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zgui/libs/node_editor/imgui_node_editor.cpp

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feat: update to 068e90b418b7da440a15db6495f2a37239d30bff
2024-09-08 23:52:23 +00:00
//------------------------------------------------------------------------------
// VERSION 0.9.1
//
// LICENSE
// This software is dual-licensed to the public domain and under the following
// license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit.
//
// CREDITS
// Written by Michal Cichon
//------------------------------------------------------------------------------
# include "imgui_node_editor_internal.h"
# include <cstdio> // snprintf
# include <string>
# include <fstream>
# include <bitset>
# include <climits>
# include <algorithm>
# include <sstream>
# include <streambuf>
# include <type_traits>
// https://stackoverflow.com/a/8597498
# define DECLARE_HAS_NESTED(Name, Member) \
\
template<class T> \
struct has_nested_ ## Name \
{ \
typedef char yes; \
typedef yes(&no)[2]; \
\
template<class U> static yes test(decltype(U::Member)*); \
template<class U> static no test(...); \
\
static bool const value = sizeof(test<T>(0)) == sizeof(yes); \
};
namespace ax {
namespace NodeEditor {
namespace Detail {
# if !defined(IMGUI_VERSION_NUM) || (IMGUI_VERSION_NUM < 18822)
# define DECLARE_KEY_TESTER(Key) \
DECLARE_HAS_NESTED(Key, Key) \
struct KeyTester_ ## Key \
{ \
template <typename T> \
static int Get(typename std::enable_if<has_nested_ ## Key<ImGuiKey_>::value, T>::type*) \
{ \
return ImGui::GetKeyIndex(T::Key); \
} \
\
template <typename T> \
static int Get(typename std::enable_if<!has_nested_ ## Key<ImGuiKey_>::value, T>::type*) \
{ \
return -1; \
} \
}
DECLARE_KEY_TESTER(ImGuiKey_F);
DECLARE_KEY_TESTER(ImGuiKey_D);
static inline int GetKeyIndexForF()
{
return KeyTester_ImGuiKey_F::Get<ImGuiKey_>(nullptr);
}
static inline int GetKeyIndexForD()
{
return KeyTester_ImGuiKey_D::Get<ImGuiKey_>(nullptr);
}
# else
static inline ImGuiKey GetKeyIndexForF()
{
return ImGuiKey_F;
}
static inline ImGuiKey GetKeyIndexForD()
{
return ImGuiKey_D;
}
# endif
} // namespace Detail
} // namespace NodeEditor
} // namespace ax
//------------------------------------------------------------------------------
namespace ed = ax::NodeEditor::Detail;
//------------------------------------------------------------------------------
static const int c_BackgroundChannelCount = 1;
static const int c_LinkChannelCount = 4;
static const int c_UserLayersCount = 5;
static const int c_UserLayerChannelStart = 0;
static const int c_BackgroundChannelStart = c_UserLayerChannelStart + c_UserLayersCount;
static const int c_LinkStartChannel = c_BackgroundChannelStart + c_BackgroundChannelCount;
static const int c_NodeStartChannel = c_LinkStartChannel + c_LinkChannelCount;
static const int c_BackgroundChannel_SelectionRect = c_BackgroundChannelStart + 0;
static const int c_UserChannel_Content = c_UserLayerChannelStart + 1;
static const int c_UserChannel_Grid = c_UserLayerChannelStart + 2;
static const int c_UserChannel_HintsBackground = c_UserLayerChannelStart + 3;
static const int c_UserChannel_Hints = c_UserLayerChannelStart + 4;
static const int c_LinkChannel_Selection = c_LinkStartChannel + 0;
static const int c_LinkChannel_Links = c_LinkStartChannel + 1;
static const int c_LinkChannel_Flow = c_LinkStartChannel + 2;
static const int c_LinkChannel_NewLink = c_LinkStartChannel + 3;
static const int c_ChannelsPerNode = 5;
static const int c_NodeBaseChannel = 0;
static const int c_NodeBackgroundChannel = 1;
static const int c_NodeUserBackgroundChannel = 2;
static const int c_NodePinChannel = 3;
static const int c_NodeContentChannel = 4;
static const float c_GroupSelectThickness = 6.0f; // canvas pixels
static const float c_LinkSelectThickness = 5.0f; // canvas pixels
static const float c_NavigationZoomMargin = 0.1f; // percentage of visible bounds
static const float c_MouseZoomDuration = 0.15f; // seconds
static const float c_SelectionFadeOutDuration = 0.15f; // seconds
static const auto c_MaxMoveOverEdgeSpeed = 10.0f;
static const auto c_MaxMoveOverEdgeDistance = 300.0f;
#if IMGUI_VERSION_NUM > 18101
static const auto c_AllRoundCornersFlags = ImDrawFlags_RoundCornersAll;
#else
static const auto c_AllRoundCornersFlags = 15;
#endif
//------------------------------------------------------------------------------
# if defined(_DEBUG) && defined(_WIN32)
extern "C" __declspec(dllimport) void __stdcall OutputDebugStringA(const char* string);
static void LogV(const char* fmt, va_list args)
{
const int buffer_size = 1024;
static char buffer[1024];
vsnprintf(buffer, buffer_size - 1, fmt, args);
buffer[buffer_size - 1] = 0;
ImGui::LogText("\nNode Editor: %s", buffer);
OutputDebugStringA("NodeEditor: ");
OutputDebugStringA(buffer);
OutputDebugStringA("\n");
}
# endif
void ed::Log(const char* fmt, ...)
{
# if defined(_DEBUG) && defined(_WIN32)
va_list args;
va_start(args, fmt);
LogV(fmt, args);
va_end(args);
# endif
}
//------------------------------------------------------------------------------
static bool IsGroup(const ed::Node* node)
{
if (node && node->m_Type == ed::NodeType::Group)
return true;
else
return false;
}
//------------------------------------------------------------------------------
static void ImDrawListSplitter_Grow(ImDrawList* draw_list, ImDrawListSplitter* splitter, int channels_count)
{
IM_ASSERT(splitter != nullptr);
IM_ASSERT(splitter->_Count <= channels_count);
if (splitter->_Count == 1)
{
splitter->Split(draw_list, channels_count);
return;
}
int old_channels_count = splitter->_Channels.Size;
if (old_channels_count < channels_count)
{
splitter->_Channels.reserve(channels_count);
splitter->_Channels.resize(channels_count);
}
int old_used_channels_count = splitter->_Count;
splitter->_Count = channels_count;
for (int i = old_used_channels_count; i < channels_count; i++)
{
if (i >= old_channels_count)
{
IM_PLACEMENT_NEW(&splitter->_Channels[i]) ImDrawChannel();
}
else
{
splitter->_Channels[i]._CmdBuffer.resize(0);
splitter->_Channels[i]._IdxBuffer.resize(0);
}
}
}
static void ImDrawList_ChannelsGrow(ImDrawList* draw_list, int channels_count)
{
ImDrawListSplitter_Grow(draw_list, &draw_list->_Splitter, channels_count);
}
static void ImDrawListSplitter_SwapChannels(ImDrawListSplitter* splitter, int left, int right)
{
IM_ASSERT(left < splitter->_Count && right < splitter->_Count);
if (left == right)
return;
auto currentChannel = splitter->_Current;
auto* leftCmdBuffer = &splitter->_Channels[left]._CmdBuffer;
auto* leftIdxBuffer = &splitter->_Channels[left]._IdxBuffer;
auto* rightCmdBuffer = &splitter->_Channels[right]._CmdBuffer;
auto* rightIdxBuffer = &splitter->_Channels[right]._IdxBuffer;
leftCmdBuffer->swap(*rightCmdBuffer);
leftIdxBuffer->swap(*rightIdxBuffer);
if (currentChannel == left)
splitter->_Current = right;
else if (currentChannel == right)
splitter->_Current = left;
}
static void ImDrawList_SwapChannels(ImDrawList* drawList, int left, int right)
{
ImDrawListSplitter_SwapChannels(&drawList->_Splitter, left, right);
}
static void ImDrawList_SwapSplitter(ImDrawList* drawList, ImDrawListSplitter& splitter)
{
auto& currentSplitter = drawList->_Splitter;
std::swap(currentSplitter._Current, splitter._Current);
std::swap(currentSplitter._Count, splitter._Count);
currentSplitter._Channels.swap(splitter._Channels);
}
//static void ImDrawList_TransformChannel_Inner(ImVector<ImDrawVert>& vtxBuffer, const ImVector<ImDrawIdx>& idxBuffer, const ImVector<ImDrawCmd>& cmdBuffer, const ImVec2& preOffset, const ImVec2& scale, const ImVec2& postOffset)
//{
// auto idxRead = idxBuffer.Data;
//
// int indexOffset = 0;
// for (auto& cmd : cmdBuffer)
// {
// auto idxCount = cmd.ElemCount;
//
// if (idxCount == 0) continue;
//
// auto minIndex = idxRead[indexOffset];
// auto maxIndex = idxRead[indexOffset];
//
// for (auto i = 1u; i < idxCount; ++i)
// {
// auto idx = idxRead[indexOffset + i];
// minIndex = std::min(minIndex, idx);
// maxIndex = ImMax(maxIndex, idx);
// }
//
// for (auto vtx = vtxBuffer.Data + minIndex, vtxEnd = vtxBuffer.Data + maxIndex + 1; vtx < vtxEnd; ++vtx)
// {
// vtx->pos.x = (vtx->pos.x + preOffset.x) * scale.x + postOffset.x;
// vtx->pos.y = (vtx->pos.y + preOffset.y) * scale.y + postOffset.y;
// }
//
// indexOffset += idxCount;
// }
//}
//static void ImDrawList_TransformChannels(ImDrawList* drawList, int begin, int end, const ImVec2& preOffset, const ImVec2& scale, const ImVec2& postOffset)
//{
// int lastCurrentChannel = drawList->_ChannelsCurrent;
// if (lastCurrentChannel != 0)
// drawList->ChannelsSetCurrent(0);
//
// auto& vtxBuffer = drawList->VtxBuffer;
//
// if (begin == 0 && begin != end)
// {
// ImDrawList_TransformChannel_Inner(vtxBuffer, drawList->IdxBuffer, drawList->CmdBuffer, preOffset, scale, postOffset);
// ++begin;
// }
//
// for (int channelIndex = begin; channelIndex < end; ++channelIndex)
// {
// auto& channel = drawList->_Channels[channelIndex];
// ImDrawList_TransformChannel_Inner(vtxBuffer, channel.IdxBuffer, channel.CmdBuffer, preOffset, scale, postOffset);
// }
//
// if (lastCurrentChannel != 0)
// drawList->ChannelsSetCurrent(lastCurrentChannel);
//}
//static void ImDrawList_ClampClipRects_Inner(ImVector<ImDrawCmd>& cmdBuffer, const ImVec4& clipRect, const ImVec2& offset)
//{
// for (auto& cmd : cmdBuffer)
// {
// cmd.ClipRect.x = ImMax(cmd.ClipRect.x + offset.x, clipRect.x);
// cmd.ClipRect.y = ImMax(cmd.ClipRect.y + offset.y, clipRect.y);
// cmd.ClipRect.z = std::min(cmd.ClipRect.z + offset.x, clipRect.z);
// cmd.ClipRect.w = std::min(cmd.ClipRect.w + offset.y, clipRect.w);
// }
//}
//static void ImDrawList_TranslateAndClampClipRects(ImDrawList* drawList, int begin, int end, const ImVec2& offset)
//{
// int lastCurrentChannel = drawList->_ChannelsCurrent;
// if (lastCurrentChannel != 0)
// drawList->ChannelsSetCurrent(0);
//
// auto clipRect = drawList->_ClipRectStack.back();
//
// if (begin == 0 && begin != end)
// {
// ImDrawList_ClampClipRects_Inner(drawList->CmdBuffer, clipRect, offset);
// ++begin;
// }
//
// for (int channelIndex = begin; channelIndex < end; ++channelIndex)
// {
// auto& channel = drawList->_Channels[channelIndex];
// ImDrawList_ClampClipRects_Inner(channel.CmdBuffer, clipRect, offset);
// }
//
// if (lastCurrentChannel != 0)
// drawList->ChannelsSetCurrent(lastCurrentChannel);
//}
static void ImDrawList_PathBezierOffset(ImDrawList* drawList, float offset, const ImVec2& p0, const ImVec2& p1, const ImVec2& p2, const ImVec2& p3)
{
using namespace ed;
auto acceptPoint = [drawList, offset](const ImCubicBezierSubdivideSample& r)
{
drawList->PathLineTo(r.Point + ImNormalized(ImVec2(-r.Tangent.y, r.Tangent.x)) * offset);
};
ImCubicBezierSubdivide(acceptPoint, p0, p1, p2, p3);
}
/*
static void ImDrawList_PolyFillScanFlood(ImDrawList *draw, std::vector<ImVec2>* poly, ImColor color, int gap = 1, float strokeWidth = 1.0f)
{
std::vector<ImVec2> scanHits;
ImVec2 min, max; // polygon min/max points
auto io = ImGui::GetIO();
float y;
bool isMinMaxDone = false;
unsigned int polysize = poly->size();
// find the orthagonal bounding box
// probably can put this as a predefined
if (!isMinMaxDone)
{
min.x = min.y = FLT_MAX;
max.x = max.y = FLT_MIN;
for (auto p : *poly)
{
if (p.x < min.x) min.x = p.x;
if (p.y < min.y) min.y = p.y;
if (p.x > max.x) max.x = p.x;
if (p.y > max.y) max.y = p.y;
}
isMinMaxDone = true;
}
// Bounds check
if ((max.x < 0) || (min.x > io.DisplaySize.x) || (max.y < 0) || (min.y > io.DisplaySize.y)) return;
// Vertically clip
if (min.y < 0) min.y = 0;
if (max.y > io.DisplaySize.y) max.y = io.DisplaySize.y;
// so we know we start on the outside of the object we step out by 1.
min.x -= 1;
max.x += 1;
// Initialise our starting conditions
y = min.y;
// Go through each scan line iteratively, jumping by 'gap' pixels each time
while (y < max.y)
{
scanHits.clear();
{
int jump = 1;
ImVec2 fp = poly->at(0);
for (size_t i = 0; i < polysize - 1; i++)
{
ImVec2 pa = poly->at(i);
ImVec2 pb = poly->at(i + 1);
// jump double/dud points
if (pa.x == pb.x && pa.y == pb.y) continue;
// if we encounter our hull/poly start point, then we've now created the
// closed
// hull, jump the next segment and reset the first-point
if ((!jump) && (fp.x == pb.x) && (fp.y == pb.y))
{
if (i < polysize - 2)
{
fp = poly->at(i + 2);
jump = 1;
i++;
}
}
else
{
jump = 0;
}
// test to see if this segment makes the scan-cut.
if ((pa.y > pb.y && y < pa.y && y > pb.y) || (pa.y < pb.y && y > pa.y && y < pb.y))
{
ImVec2 intersect;
intersect.y = y;
if (pa.x == pb.x)
{
intersect.x = pa.x;
}
else
{
intersect.x = (pb.x - pa.x) / (pb.y - pa.y) * (y - pa.y) + pa.x;
}
scanHits.push_back(intersect);
}
}
// Sort the scan hits by X, so we have a proper left->right ordering
sort(scanHits.begin(), scanHits.end(), [](ImVec2 const &a, ImVec2 const &b) { return a.x < b.x; });
// generate the line segments.
{
int i = 0;
int l = scanHits.size() - 1; // we need pairs of points, this prevents segfault.
for (i = 0; i < l; i += 2)
{
draw->AddLine(scanHits[i], scanHits[i + 1], color, strokeWidth);
}
}
}
y += gap;
} // for each scan line
scanHits.clear();
}
*/
static void ImDrawList_AddBezierWithArrows(ImDrawList* drawList, const ImCubicBezierPoints& curve, float thickness,
float startArrowSize, float startArrowWidth, float endArrowSize, float endArrowWidth,
bool fill, ImU32 color, float strokeThickness, const ImVec2* startDirHint = nullptr, const ImVec2* endDirHint = nullptr)
{
using namespace ax;
if ((color >> 24) == 0)
return;
const auto half_thickness = thickness * 0.5f;
if (fill)
{
drawList->AddBezierCubic(curve.P0, curve.P1, curve.P2, curve.P3, color, thickness);
if (startArrowSize > 0.0f)
{
const auto start_dir = ImNormalized(startDirHint ? *startDirHint : ImCubicBezierTangent(curve.P0, curve.P1, curve.P2, curve.P3, 0.0f));
const auto start_n = ImVec2(-start_dir.y, start_dir.x);
const auto half_width = startArrowWidth * 0.5f;
const auto tip = curve.P0 - start_dir * startArrowSize;
drawList->PathLineTo(curve.P0 - start_n * ImMax(half_width, half_thickness));
drawList->PathLineTo(curve.P0 + start_n * ImMax(half_width, half_thickness));
drawList->PathLineTo(tip);
drawList->PathFillConvex(color);
}
if (endArrowSize > 0.0f)
{
const auto end_dir = ImNormalized(endDirHint ? -*endDirHint : ImCubicBezierTangent(curve.P0, curve.P1, curve.P2, curve.P3, 1.0f));
const auto end_n = ImVec2( -end_dir.y, end_dir.x);
const auto half_width = endArrowWidth * 0.5f;
const auto tip = curve.P3 + end_dir * endArrowSize;
drawList->PathLineTo(curve.P3 + end_n * ImMax(half_width, half_thickness));
drawList->PathLineTo(curve.P3 - end_n * ImMax(half_width, half_thickness));
drawList->PathLineTo(tip);
drawList->PathFillConvex(color);
}
}
else
{
if (startArrowSize > 0.0f)
{
const auto start_dir = ImNormalized(ImCubicBezierTangent(curve.P0, curve.P1, curve.P2, curve.P3, 0.0f));
const auto start_n = ImVec2(-start_dir.y, start_dir.x);
const auto half_width = startArrowWidth * 0.5f;
const auto tip = curve.P0 - start_dir * startArrowSize;
if (half_width > half_thickness)
drawList->PathLineTo(curve.P0 - start_n * half_width);
drawList->PathLineTo(tip);
if (half_width > half_thickness)
drawList->PathLineTo(curve.P0 + start_n * half_width);
}
ImDrawList_PathBezierOffset(drawList, half_thickness, curve.P0, curve.P1, curve.P2, curve.P3);
if (endArrowSize > 0.0f)
{
const auto end_dir = ImNormalized(ImCubicBezierTangent(curve.P0, curve.P1, curve.P2, curve.P3, 1.0f));
const auto end_n = ImVec2( -end_dir.y, end_dir.x);
const auto half_width = endArrowWidth * 0.5f;
const auto tip = curve.P3 + end_dir * endArrowSize;
if (half_width > half_thickness)
drawList->PathLineTo(curve.P3 + end_n * half_width);
drawList->PathLineTo(tip);
if (half_width > half_thickness)
drawList->PathLineTo(curve.P3 - end_n * half_width);
}
ImDrawList_PathBezierOffset(drawList, half_thickness, curve.P3, curve.P2, curve.P1, curve.P0);
drawList->PathStroke(color, true, strokeThickness);
}
}
//------------------------------------------------------------------------------
//
// Pin
//
//------------------------------------------------------------------------------
void ed::Pin::Draw(ImDrawList* drawList, DrawFlags flags)
{
if (flags & Hovered)
{
drawList->ChannelsSetCurrent(m_Node->m_Channel + c_NodePinChannel);
drawList->AddRectFilled(m_Bounds.Min, m_Bounds.Max,
m_Color, m_Rounding, m_Corners);
if (m_BorderWidth > 0.0f)
{
FringeScaleScope fringe(1.0f);
drawList->AddRect(m_Bounds.Min, m_Bounds.Max,
m_BorderColor, m_Rounding, m_Corners, m_BorderWidth);
}
if (!Editor->IsSelected(m_Node))
m_Node->Draw(drawList, flags);
}
}
ImVec2 ed::Pin::GetClosestPoint(const ImVec2& p) const
{
auto pivot = m_Pivot;
auto extent = m_Radius + m_ArrowSize;
if (m_SnapLinkToDir && extent > 0.0f)
{
pivot.Min += m_Dir * extent;
pivot.Max += m_Dir * extent;
extent = 0;
}
return ImRect_ClosestPoint(pivot, p, true, extent);
}
ImLine ed::Pin::GetClosestLine(const Pin* pin) const
{
auto pivotA = m_Pivot;
auto pivotB = pin->m_Pivot;
auto extentA = m_Radius + m_ArrowSize;
auto extentB = pin->m_Radius + pin->m_ArrowSize;
if (m_SnapLinkToDir && extentA > 0.0f)
{
pivotA.Min += m_Dir * extentA;
pivotA.Max += m_Dir * extentA;
extentA = 0;
}
if (pin->m_SnapLinkToDir && extentB > 0.0f)
{
pivotB.Min += pin->m_Dir * extentB;
pivotB.Max += pin->m_Dir * extentB;
extentB = 0;
}
return ImRect_ClosestLine(pivotA, pivotB, extentA, extentB);
}
//------------------------------------------------------------------------------
//
// Node
//
//------------------------------------------------------------------------------
bool ed::Node::AcceptDrag()
{
m_DragStart = m_Bounds.Min;
return true;
}
void ed::Node::UpdateDrag(const ImVec2& offset)
{
auto size = m_Bounds.GetSize();
m_Bounds.Min = ImFloor(m_DragStart + offset);
m_Bounds.Max = m_Bounds.Min + size;
}
bool ed::Node::EndDrag()
{
return m_Bounds.Min != m_DragStart;
}
void ed::Node::Draw(ImDrawList* drawList, DrawFlags flags)
{
if (flags == Detail::Object::None)
{
drawList->ChannelsSetCurrent(m_Channel + c_NodeBackgroundChannel);
drawList->AddRectFilled(
m_Bounds.Min,
m_Bounds.Max,
m_Color, m_Rounding);
if (IsGroup(this))
{
drawList->AddRectFilled(
m_GroupBounds.Min,
m_GroupBounds.Max,
m_GroupColor, m_GroupRounding);
if (m_GroupBorderWidth > 0.0f)
{
FringeScaleScope fringe(1.0f);
drawList->AddRect(
m_GroupBounds.Min,
m_GroupBounds.Max,
m_GroupBorderColor, m_GroupRounding, c_AllRoundCornersFlags, m_GroupBorderWidth);
}
}
# if 0
// #debug: highlight group regions
auto drawRect = [drawList](const ImRect& rect, ImU32 color)
{
if (ImRect_IsEmpty(rect)) return;
drawList->AddRectFilled(rect.Min, rect.Max, color);
};
drawRect(GetRegionBounds(NodeRegion::Top), IM_COL32(255, 0, 0, 64));
drawRect(GetRegionBounds(NodeRegion::Bottom), IM_COL32(255, 0, 0, 64));
drawRect(GetRegionBounds(NodeRegion::Left), IM_COL32(0, 255, 0, 64));
drawRect(GetRegionBounds(NodeRegion::Right), IM_COL32(0, 255, 0, 64));
drawRect(GetRegionBounds(NodeRegion::TopLeft), IM_COL32(255, 0, 255, 64));
drawRect(GetRegionBounds(NodeRegion::TopRight), IM_COL32(255, 0, 255, 64));
drawRect(GetRegionBounds(NodeRegion::BottomLeft), IM_COL32(255, 0, 255, 64));
drawRect(GetRegionBounds(NodeRegion::BottomRight), IM_COL32(255, 0, 255, 64));
drawRect(GetRegionBounds(NodeRegion::Center), IM_COL32(0, 0, 255, 64));
drawRect(GetRegionBounds(NodeRegion::Header), IM_COL32(0, 255, 255, 64));
# endif
DrawBorder(drawList, m_BorderColor, m_BorderWidth);
}
else if (flags & Selected)
{
const auto borderColor = Editor->GetColor(StyleColor_SelNodeBorder);
const auto& editorStyle = Editor->GetStyle();
drawList->ChannelsSetCurrent(m_Channel + c_NodeBaseChannel);
DrawBorder(drawList, borderColor, editorStyle.SelectedNodeBorderWidth, editorStyle.SelectedNodeBorderOffset);
}
else if (!IsGroup(this) && (flags & Hovered))
{
const auto borderColor = Editor->GetColor(StyleColor_HovNodeBorder);
const auto& editorStyle = Editor->GetStyle();
drawList->ChannelsSetCurrent(m_Channel + c_NodeBaseChannel);
DrawBorder(drawList, borderColor, editorStyle.HoveredNodeBorderWidth, editorStyle.HoverNodeBorderOffset);
}
}
void ed::Node::DrawBorder(ImDrawList* drawList, ImU32 color, float thickness, float offset)
{
if (thickness > 0.0f)
{
const ImVec2 extraOffset = ImVec2(offset, offset);
drawList->AddRect(m_Bounds.Min - extraOffset, m_Bounds.Max + extraOffset,
color, ImMax(0.0f, m_Rounding + offset), c_AllRoundCornersFlags, thickness);
}
}
void ed::Node::GetGroupedNodes(std::vector<Node*>& result, bool append)
{
if (!append)
result.resize(0);
if (!IsGroup(this))
return;
const auto firstNodeIndex = result.size();
Editor->FindNodesInRect(m_GroupBounds, result, true, false);
for (auto index = firstNodeIndex; index < result.size(); ++index)
result[index]->GetGroupedNodes(result, true);
}
ImRect ed::Node::GetRegionBounds(NodeRegion region) const
{
if (m_Type == NodeType::Node)
{
if (region == NodeRegion::Header)
return m_Bounds;
}
else if (m_Type == NodeType::Group)
{
const float activeAreaMinimumSize = ImMax(ImMax(
Editor->GetView().InvScale * c_GroupSelectThickness,
m_GroupBorderWidth), c_GroupSelectThickness);
const float minimumSize = activeAreaMinimumSize * 5;
auto bounds = m_Bounds;
if (bounds.GetWidth() < minimumSize)
bounds.Expand(ImVec2(minimumSize - bounds.GetWidth(), 0.0f));
if (bounds.GetHeight() < minimumSize)
bounds.Expand(ImVec2(0.0f, minimumSize - bounds.GetHeight()));
if (region == NodeRegion::Top)
{
bounds.Max.y = bounds.Min.y + activeAreaMinimumSize;
bounds.Min.x += activeAreaMinimumSize;
bounds.Max.x -= activeAreaMinimumSize;
return bounds;
}
else if (region == NodeRegion::Bottom)
{
bounds.Min.y = bounds.Max.y - activeAreaMinimumSize;
bounds.Min.x += activeAreaMinimumSize;
bounds.Max.x -= activeAreaMinimumSize;
return bounds;
}
else if (region == NodeRegion::Left)
{
bounds.Max.x = bounds.Min.x + activeAreaMinimumSize;
bounds.Min.y += activeAreaMinimumSize;
bounds.Max.y -= activeAreaMinimumSize;
return bounds;
}
else if (region == NodeRegion::Right)
{
bounds.Min.x = bounds.Max.x - activeAreaMinimumSize;
bounds.Min.y += activeAreaMinimumSize;
bounds.Max.y -= activeAreaMinimumSize;
return bounds;
}
else if (region == NodeRegion::TopLeft)
{
bounds.Max.x = bounds.Min.x + activeAreaMinimumSize * 2;
bounds.Max.y = bounds.Min.y + activeAreaMinimumSize * 2;
return bounds;
}
else if (region == NodeRegion::TopRight)
{
bounds.Min.x = bounds.Max.x - activeAreaMinimumSize * 2;
bounds.Max.y = bounds.Min.y + activeAreaMinimumSize * 2;
return bounds;
}
else if (region == NodeRegion::BottomRight)
{
bounds.Min.x = bounds.Max.x - activeAreaMinimumSize * 2;
bounds.Min.y = bounds.Max.y - activeAreaMinimumSize * 2;
return bounds;
}
else if (region == NodeRegion::BottomLeft)
{
bounds.Max.x = bounds.Min.x + activeAreaMinimumSize * 2;
bounds.Min.y = bounds.Max.y - activeAreaMinimumSize * 2;
return bounds;
}
else if (region == NodeRegion::Header)
{
bounds.Min.x += activeAreaMinimumSize;
bounds.Max.x -= activeAreaMinimumSize;
bounds.Min.y += activeAreaMinimumSize;
bounds.Max.y = ImMax(bounds.Min.y + activeAreaMinimumSize, m_GroupBounds.Min.y);
return bounds;
}
else if (region == NodeRegion::Center)
{
bounds.Max.x -= activeAreaMinimumSize;
bounds.Min.y = ImMax(bounds.Min.y + activeAreaMinimumSize, m_GroupBounds.Min.y);
bounds.Min.x += activeAreaMinimumSize;
bounds.Max.y -= activeAreaMinimumSize;
return bounds;
}
}
return ImRect();
}
ed::NodeRegion ed::Node::GetRegion(const ImVec2& point) const
{
if (m_Type == NodeType::Node)
{
if (m_Bounds.Contains(point))
return NodeRegion::Header;
else
return NodeRegion::None;
}
else if (m_Type == NodeType::Group)
{
static const NodeRegion c_Regions[] =
{
// Corners first, they may overlap other regions.
NodeRegion::TopLeft,
NodeRegion::TopRight,
NodeRegion::BottomLeft,
NodeRegion::BottomRight,
NodeRegion::Header,
NodeRegion::Top,
NodeRegion::Bottom,
NodeRegion::Left,
NodeRegion::Right,
NodeRegion::Center
};
for (auto region : c_Regions)
{
auto bounds = GetRegionBounds(region);
if (bounds.Contains(point))
return region;
}
}
return NodeRegion::None;
}
//------------------------------------------------------------------------------
//
// Link
//
//------------------------------------------------------------------------------
void ed::Link::Draw(ImDrawList* drawList, DrawFlags flags)
{
if (flags == None)
{
drawList->ChannelsSetCurrent(c_LinkChannel_Links);
Draw(drawList, m_Color, 0.0f);
}
else if (flags & Selected)
{
const auto borderColor = Editor->GetColor(StyleColor_SelLinkBorder);
drawList->ChannelsSetCurrent(c_LinkChannel_Selection);
Draw(drawList, borderColor, 4.5f);
}
else if (flags & Hovered)
{
const auto borderColor = Editor->GetColor(StyleColor_HovLinkBorder);
drawList->ChannelsSetCurrent(c_LinkChannel_Selection);
Draw(drawList, borderColor, 2.0f);
}
else if (flags & Highlighted)
{
drawList->ChannelsSetCurrent(c_LinkChannel_Selection);
Draw(drawList, m_HighlightColor, 3.5f);
}
}
void ed::Link::Draw(ImDrawList* drawList, ImU32 color, float extraThickness) const
{
if (!m_IsLive)
return;
const auto curve = GetCurve();
ImDrawList_AddBezierWithArrows(drawList, curve, m_Thickness + extraThickness,
m_StartPin && m_StartPin->m_ArrowSize > 0.0f ? m_StartPin->m_ArrowSize + extraThickness : 0.0f,
m_StartPin && m_StartPin->m_ArrowWidth > 0.0f ? m_StartPin->m_ArrowWidth + extraThickness : 0.0f,
m_EndPin && m_EndPin->m_ArrowSize > 0.0f ? m_EndPin->m_ArrowSize + extraThickness : 0.0f,
m_EndPin && m_EndPin->m_ArrowWidth > 0.0f ? m_EndPin->m_ArrowWidth + extraThickness : 0.0f,
true, color, 1.0f,
m_StartPin && m_StartPin->m_SnapLinkToDir ? &m_StartPin->m_Dir : nullptr,
m_EndPin && m_EndPin->m_SnapLinkToDir ? &m_EndPin->m_Dir : nullptr);
}
void ed::Link::UpdateEndpoints()
{
const auto line = m_StartPin->GetClosestLine(m_EndPin);
m_Start = line.A;
m_End = line.B;
}
ImCubicBezierPoints ed::Link::GetCurve() const
{
auto easeLinkStrength = [](const ImVec2& a, const ImVec2& b, float strength)
{
const auto distanceX = b.x - a.x;
const auto distanceY = b.y - a.y;
const auto distance = ImSqrt(distanceX * distanceX + distanceY * distanceY);
const auto halfDistance = distance * 0.5f;
if (halfDistance < strength)
strength = strength * ImSin(IM_PI * 0.5f * halfDistance / strength);
return strength;
};
const auto startStrength = easeLinkStrength(m_Start, m_End, m_StartPin->m_Strength);
const auto endStrength = easeLinkStrength(m_Start, m_End, m_EndPin->m_Strength);
const auto cp0 = m_Start + m_StartPin->m_Dir * startStrength;
const auto cp1 = m_End + m_EndPin->m_Dir * endStrength;
ImCubicBezierPoints result;
result.P0 = m_Start;
result.P1 = cp0;
result.P2 = cp1;
result.P3 = m_End;
return result;
}
bool ed::Link::TestHit(const ImVec2& point, float extraThickness) const
{
if (!m_IsLive)
return false;
auto bounds = GetBounds();
if (extraThickness > 0.0f)
bounds.Expand(extraThickness);
if (!bounds.Contains(point))
return false;
const auto bezier = GetCurve();
const auto result = ImProjectOnCubicBezier(point, bezier.P0, bezier.P1, bezier.P2, bezier.P3, 50);
return result.Distance <= m_Thickness + extraThickness;
}
bool ed::Link::TestHit(const ImRect& rect, bool allowIntersect) const
{
if (!m_IsLive)
return false;
const auto bounds = GetBounds();
if (rect.Contains(bounds))
return true;
if (!allowIntersect || !rect.Overlaps(bounds))
return false;
const auto bezier = GetCurve();
const auto p0 = rect.GetTL();
const auto p1 = rect.GetTR();
const auto p2 = rect.GetBR();
const auto p3 = rect.GetBL();
if (ImCubicBezierLineIntersect(bezier.P0, bezier.P1, bezier.P2, bezier.P3, p0, p1).Count > 0)
return true;
if (ImCubicBezierLineIntersect(bezier.P0, bezier.P1, bezier.P2, bezier.P3, p1, p2).Count > 0)
return true;
if (ImCubicBezierLineIntersect(bezier.P0, bezier.P1, bezier.P2, bezier.P3, p2, p3).Count > 0)
return true;
if (ImCubicBezierLineIntersect(bezier.P0, bezier.P1, bezier.P2, bezier.P3, p3, p0).Count > 0)
return true;
return false;
}
ImRect ed::Link::GetBounds() const
{
if (m_IsLive)
{
const auto curve = GetCurve();
auto bounds = ImCubicBezierBoundingRect(curve.P0, curve.P1, curve.P2, curve.P3);
if (bounds.GetWidth() == 0.0f)
{
bounds.Min.x -= 0.5f;
bounds.Max.x += 0.5f;
}
if (bounds.GetHeight() == 0.0f)
{
bounds.Min.y -= 0.5f;
bounds.Max.y += 0.5f;
}
if (m_StartPin->m_ArrowSize)
{
const auto start_dir = ImNormalized(ImCubicBezierTangent(curve.P0, curve.P1, curve.P2, curve.P3, 0.0f));
const auto p0 = curve.P0;
const auto p1 = curve.P0 - start_dir * m_StartPin->m_ArrowSize;
const auto min = ImMin(p0, p1);
const auto max = ImMax(p0, p1);
auto arrowBounds = ImRect(min, ImMax(max, min + ImVec2(1, 1)));
bounds.Add(arrowBounds);
}
if (m_EndPin->m_ArrowSize)
{
const auto end_dir = ImNormalized(ImCubicBezierTangent(curve.P0, curve.P1, curve.P2, curve.P3, 1.0f));
const auto p0 = curve.P3;
const auto p1 = curve.P3 + end_dir * m_EndPin->m_ArrowSize;
const auto min = ImMin(p0, p1);
const auto max = ImMax(p0, p1);
auto arrowBounds = ImRect(min, ImMax(max, min + ImVec2(1, 1)));
bounds.Add(arrowBounds);
}
return bounds;
}
else
return ImRect();
}
//------------------------------------------------------------------------------
//
// Editor Context
//
//------------------------------------------------------------------------------
ed::EditorContext::EditorContext(const ax::NodeEditor::Config* config)
: m_Config(config)
, m_EditorActiveId(0)
, m_IsFirstFrame(true)
, m_IsFocused(false)
, m_IsHovered(false)
, m_IsHoveredWithoutOverlapp(false)
, m_ShortcutsEnabled(true)
, m_Style()
, m_Nodes()
, m_Pins()
, m_Links()
, m_SelectionId(1)
, m_LastActiveLink(nullptr)
, m_Canvas()
, m_IsCanvasVisible(false)
, m_NodeBuilder(this)
, m_HintBuilder(this)
, m_CurrentAction(nullptr)
, m_NavigateAction(this, m_Canvas)
, m_SizeAction(this)
, m_DragAction(this)
, m_SelectAction(this)
, m_ContextMenuAction(this)
, m_ShortcutAction(this)
, m_CreateItemAction(this)
, m_DeleteItemsAction(this)
, m_AnimationControllers{ &m_FlowAnimationController }
, m_FlowAnimationController(this)
, m_HoveredNode(0)
, m_HoveredPin(0)
, m_HoveredLink(0)
, m_DoubleClickedNode(0)
, m_DoubleClickedPin(0)
, m_DoubleClickedLink(0)
, m_BackgroundClickButtonIndex(-1)
, m_BackgroundDoubleClickButtonIndex(-1)
, m_IsInitialized(false)
, m_Settings()
, m_DrawList(nullptr)
, m_ExternalChannel(0)
{
}
ed::EditorContext::~EditorContext()
{
if (m_IsInitialized)
SaveSettings();
for (auto link : m_Links) delete link.m_Object;
for (auto pin : m_Pins) delete pin.m_Object;
for (auto node : m_Nodes) delete node.m_Object;
m_Splitter.ClearFreeMemory();
}
void ed::EditorContext::Begin(const char* id, const ImVec2& size)
{
m_EditorActiveId = ImGui::GetID(id);
ImGui::PushID(id);
auto availableContentSize = ImGui::GetContentRegionAvail();
ImVec2 canvasSize = ImFloor(size);
if (canvasSize.x <= 0.0f)
canvasSize.x = ImMax(4.0f, availableContentSize.x);
if (canvasSize.y <= 0.0f)
canvasSize.y = ImMax(4.0f, availableContentSize.y);
if (!m_IsInitialized)
{
// Cycle canvas, so it has a chance to initialize its size before settings are loaded
if (m_Canvas.Begin(id, canvasSize))
m_Canvas.End();
LoadSettings();
m_IsInitialized = true;
}
//ImGui::LogToClipboard();
//Log("---- begin ----");
static auto resetAndCollect = [](auto& objects)
{
objects.erase(std::remove_if(objects.begin(), objects.end(), [](auto objectWrapper)
{
if (objectWrapper->m_DeleteOnNewFrame)
{
delete objectWrapper.m_Object;
return true;
}
else
{
objectWrapper->Reset();
return false;
}
}), objects.end());
};
resetAndCollect(m_Nodes);
resetAndCollect(m_Pins);
resetAndCollect(m_Links);
m_DrawList = ImGui::GetWindowDrawList();
ImDrawList_SwapSplitter(m_DrawList, m_Splitter);
m_ExternalChannel = m_DrawList->_Splitter._Current;
if (m_CurrentAction && m_CurrentAction->IsDragging() && m_NavigateAction.MoveOverEdge(canvasSize))
{
auto& io = ImGui::GetIO();
auto offset = m_NavigateAction.GetMoveScreenOffset();
for (int i = 0; i < 5; ++i)
io.MouseClickedPos[i] = io.MouseClickedPos[i] - offset;
}
else
m_NavigateAction.StopMoveOverEdge();
auto previousSize = m_Canvas.Rect().GetSize();
auto previousVisibleRect = m_Canvas.ViewRect();
m_IsCanvasVisible = m_Canvas.Begin(id, canvasSize);
//ImGui::PushStyleColor(ImGuiCol_ChildBg, ImVec4(0, 0, 0, 0));
//ImGui::BeginChild(id, size, false,
// ImGuiWindowFlags_NoMove |
// ImGuiWindowFlags_NoScrollbar |
// ImGuiWindowFlags_NoScrollWithMouse);
m_IsFocused = ImGui::IsWindowFocused();
//
m_NavigateAction.SetWindow(m_Canvas.ViewRect().Min, m_Canvas.ViewRect().GetSize());
// Handle canvas size change. Scale to Y axis, center on X.
if (!ImRect_IsEmpty(previousVisibleRect) && previousSize != canvasSize)
{
m_NavigateAction.FinishNavigation();
auto centerX = (previousVisibleRect.Max.x + previousVisibleRect.Min.x) * 0.5f;
auto centerY = (previousVisibleRect.Max.y + previousVisibleRect.Min.y) * 0.5f;
auto currentVisibleRect = m_Canvas.ViewRect();
auto currentAspectRatio = currentVisibleRect.GetHeight() ? (currentVisibleRect.GetWidth() / currentVisibleRect.GetHeight()) : 0.0f;
auto width = previousVisibleRect.GetWidth();
auto height = previousVisibleRect.GetHeight();
if (m_Config.CanvasSizeMode == ax::NodeEditor::CanvasSizeMode::FitVerticalView)
{
height = previousVisibleRect.GetHeight();
width = height * currentAspectRatio;
}
else if (m_Config.CanvasSizeMode == ax::NodeEditor::CanvasSizeMode::FitHorizontalView)
{
width = previousVisibleRect.GetWidth();
height = width / currentAspectRatio;
}
else if (m_Config.CanvasSizeMode == ax::NodeEditor::CanvasSizeMode::CenterOnly)
{
width = currentVisibleRect.GetWidth();
height = currentVisibleRect.GetHeight();
}
previousVisibleRect.Min.x = centerX - 0.5f * width;
previousVisibleRect.Max.x = centerX + 0.5f * width;
previousVisibleRect.Min.y = centerY - 0.5f * height;
previousVisibleRect.Max.y = centerY + 0.5f * height;
m_NavigateAction.NavigateTo(previousVisibleRect, Detail::NavigateAction::ZoomMode::Exact, 0.0f);
}
m_Canvas.SetView(m_NavigateAction.GetView());
// #debug #clip
//ImGui::Text("CLIP = { x=%g y=%g w=%g h=%g r=%g b=%g }",
// clipMin.x, clipMin.y, clipMax.x - clipMin.x, clipMax.y - clipMin.y, clipMax.x, clipMax.y);
// Reserve channels for background and links
ImDrawList_ChannelsGrow(m_DrawList, c_NodeStartChannel);
if (HasSelectionChanged())
++m_SelectionId;
m_LastSelectedObjects = m_SelectedObjects;
}
void ed::EditorContext::End()
{
//auto& io = ImGui::GetIO();
auto control = BuildControl(m_CurrentAction && m_CurrentAction->IsDragging()); // NavigateAction.IsMovingOverEdge()
//auto& editorStyle = GetStyle();
m_HoveredNode = control.HotNode && m_CurrentAction == nullptr ? control.HotNode->m_ID : 0;
m_HoveredPin = control.HotPin && m_CurrentAction == nullptr ? control.HotPin->m_ID : 0;
m_HoveredLink = control.HotLink && m_CurrentAction == nullptr ? control.HotLink->m_ID : 0;
m_DoubleClickedNode = control.DoubleClickedNode ? control.DoubleClickedNode->m_ID : 0;
m_DoubleClickedPin = control.DoubleClickedPin ? control.DoubleClickedPin->m_ID : 0;
m_DoubleClickedLink = control.DoubleClickedLink ? control.DoubleClickedLink->m_ID : 0;
m_BackgroundClickButtonIndex = control.BackgroundClickButtonIndex;
m_BackgroundDoubleClickButtonIndex = control.BackgroundDoubleClickButtonIndex;
//if (DoubleClickedNode) LOG_TRACE(0, "DOUBLE CLICK NODE: %d", DoubleClickedNode);
//if (DoubleClickedPin) LOG_TRACE(0, "DOUBLE CLICK PIN: %d", DoubleClickedPin);
//if (DoubleClickedLink) LOG_TRACE(0, "DOUBLE CLICK LINK: %d", DoubleClickedLink);
//if (BackgroundDoubleClicked) LOG_TRACE(0, "DOUBLE CLICK BACKGROUND", DoubleClickedLink);
const bool isSelecting = m_CurrentAction && m_CurrentAction->AsSelect() != nullptr;
const bool isDragging = m_CurrentAction && m_CurrentAction->AsDrag() != nullptr;
//const bool isSizing = CurrentAction && CurrentAction->AsSize() != nullptr;
// Draw nodes
for (auto node : m_Nodes)
if (node->m_IsLive && node->IsVisible())
node->Draw(m_DrawList);
// Draw links
for (auto link : m_Links)
if (link->m_IsLive && link->IsVisible())
link->Draw(m_DrawList);
// Highlight selected objects
{
auto selectedObjects = &m_SelectedObjects;
if (auto selectAction = m_CurrentAction ? m_CurrentAction->AsSelect() : nullptr)
selectedObjects = &selectAction->m_CandidateObjects;
for (auto selectedObject : *selectedObjects)
{
if (selectedObject->IsVisible())
selectedObject->Draw(m_DrawList, Object::Selected);
}
// Highlight adjacent links
static auto isLinkHighlightedForPin = [](const Pin& pin)
{
return pin.m_Node->m_HighlightConnectedLinks && pin.m_Node->m_IsSelected;
};
for (auto& link : m_Links)
{
if (!link->m_IsLive || !link->IsVisible())
continue;
auto isLinkHighlighted = isLinkHighlightedForPin(*link->m_StartPin) || isLinkHighlightedForPin(*link->m_EndPin);
if (!isLinkHighlighted)
continue;
link->Draw(m_DrawList, Object::Highlighted);
}
}
if (!isSelecting)
{
auto hoveredObject = control.HotObject;
if (auto dragAction = m_CurrentAction ? m_CurrentAction->AsDrag() : nullptr)
hoveredObject = dragAction->m_DraggedObject;
if (auto sizeAction = m_CurrentAction ? m_CurrentAction->AsSize() : nullptr)
hoveredObject = sizeAction->m_SizedNode;
if (hoveredObject && !IsSelected(hoveredObject) && hoveredObject->IsVisible())
hoveredObject->Draw(m_DrawList, Object::Hovered);
}
// Draw animations
for (auto controller : m_AnimationControllers)
controller->Draw(m_DrawList);
if (m_CurrentAction && !m_CurrentAction->Process(control))
m_CurrentAction = nullptr;
if (m_NavigateAction.m_IsActive)
m_NavigateAction.Process(control);
else
m_NavigateAction.Accept(control);
if (nullptr == m_CurrentAction)
{
EditorAction* possibleAction = nullptr;
auto accept = [&possibleAction, &control](EditorAction& action)
{
auto result = action.Accept(control);
if (result == EditorAction::True)
return true;
else if (/*!possibleAction &&*/ result == EditorAction::Possible)
possibleAction = &action;
else if (result == EditorAction::Possible)
action.Reject();
return false;
};
if (accept(m_ContextMenuAction))
m_CurrentAction = &m_ContextMenuAction;
else if (accept(m_ShortcutAction))
m_CurrentAction = &m_ShortcutAction;
else if (accept(m_SizeAction))
m_CurrentAction = &m_SizeAction;
else if (accept(m_DragAction))
m_CurrentAction = &m_DragAction;
else if (accept(m_CreateItemAction))
m_CurrentAction = &m_CreateItemAction;
else if (accept(m_DeleteItemsAction))
m_CurrentAction = &m_DeleteItemsAction;
else if (accept(m_SelectAction))
m_CurrentAction = &m_SelectAction;
if (possibleAction)
ImGui::SetMouseCursor(possibleAction->GetCursor());
if (m_CurrentAction && possibleAction)
possibleAction->Reject();
}
if (m_CurrentAction)
ImGui::SetMouseCursor(m_CurrentAction->GetCursor());
// Draw selection rectangle
m_SelectAction.Draw(m_DrawList);
bool sortGroups = false;
if (control.ActiveNode)
{
if (!IsGroup(control.ActiveNode))
{
// Bring active node to front
auto activeNodeIt = std::find(m_Nodes.begin(), m_Nodes.end(), control.ActiveNode);
std::rotate(activeNodeIt, activeNodeIt + 1, m_Nodes.end());
}
else if (!isDragging && m_CurrentAction && m_CurrentAction->AsDrag())
{
// Bring content of dragged group to front
std::vector<Node*> nodes;
control.ActiveNode->GetGroupedNodes(nodes);
std::stable_partition(m_Nodes.begin(), m_Nodes.end(), [&nodes](Node* node)
{
return std::find(nodes.begin(), nodes.end(), node) == nodes.end();
});
sortGroups = true;
}
}
// Sort nodes if bounds of node changed
if (sortGroups || ((m_Settings.m_DirtyReason & (SaveReasonFlags::Position | SaveReasonFlags::Size)) != SaveReasonFlags::None))
{
// Bring all groups before regular nodes
auto groupsItEnd = std::stable_partition(m_Nodes.begin(), m_Nodes.end(), IsGroup);
// Sort groups by area
std::sort(m_Nodes.begin(), groupsItEnd, [this](Node* lhs, Node* rhs)
{
const auto& lhsSize = lhs == m_SizeAction.m_SizedNode ? m_SizeAction.GetStartGroupBounds().GetSize() : lhs->m_GroupBounds.GetSize();
const auto& rhsSize = rhs == m_SizeAction.m_SizedNode ? m_SizeAction.GetStartGroupBounds().GetSize() : rhs->m_GroupBounds.GetSize();
const auto lhsArea = lhsSize.x * lhsSize.y;
const auto rhsArea = rhsSize.x * rhsSize.y;
return lhsArea > rhsArea;
});
}
// Apply Z order
std::stable_sort(m_Nodes.begin(), m_Nodes.end(), [](const auto& lhs, const auto& rhs)
{
return lhs->m_ZPosition < rhs->m_ZPosition;
});
# if 1
// Every node has few channels assigned. Grow channel list
// to hold twice as much of channels and place them in
// node drawing order.
{
// Copy group nodes
auto liveNodeCount = static_cast<int>(std::count_if(m_Nodes.begin(), m_Nodes.end(), [](Node* node) { return node->m_IsLive; }));
// Reserve two additional channels for sorted list of channels
auto nodeChannelCount = m_DrawList->_Splitter._Count;
ImDrawList_ChannelsGrow(m_DrawList, m_DrawList->_Splitter._Count + c_ChannelsPerNode * liveNodeCount + c_LinkChannelCount);
int targetChannel = nodeChannelCount;
auto copyNode = [this, &targetChannel](Node* node)
{
if (!node->m_IsLive)
return;
for (int i = 0; i < c_ChannelsPerNode; ++i)
ImDrawList_SwapChannels(m_DrawList, node->m_Channel + i, targetChannel + i);
node->m_Channel = targetChannel;
targetChannel += c_ChannelsPerNode;
};
auto groupsItEnd = std::find_if(m_Nodes.begin(), m_Nodes.end(), [](Node* node) { return !IsGroup(node); });
// Copy group nodes
std::for_each(m_Nodes.begin(), groupsItEnd, copyNode);
// Copy links
for (int i = 0; i < c_LinkChannelCount; ++i, ++targetChannel)
ImDrawList_SwapChannels(m_DrawList, c_LinkStartChannel + i, targetChannel);
// Copy normal nodes
std::for_each(groupsItEnd, m_Nodes.end(), copyNode);
}
# endif
// ImGui::PopClipRect();
// Draw grid
# if 1 // #FIXME
{
//auto& style = ImGui::GetStyle();
m_DrawList->ChannelsSetCurrent(c_UserChannel_Grid);
ImVec2 offset = m_Canvas.ViewOrigin() * (1.0f / m_Canvas.ViewScale());
ImU32 GRID_COLOR = GetColor(StyleColor_Grid, ImClamp(m_Canvas.ViewScale() * m_Canvas.ViewScale(), 0.0f, 1.0f));
float GRID_SX = 32.0f;// * m_Canvas.ViewScale();
float GRID_SY = 32.0f;// * m_Canvas.ViewScale();
ImVec2 VIEW_POS = m_Canvas.ViewRect().Min;
ImVec2 VIEW_SIZE = m_Canvas.ViewRect().GetSize();
m_DrawList->AddRectFilled(VIEW_POS, VIEW_POS + VIEW_SIZE, GetColor(StyleColor_Bg));
for (float x = fmodf(offset.x, GRID_SX); x < VIEW_SIZE.x; x += GRID_SX)
m_DrawList->AddLine(ImVec2(x, 0.0f) + VIEW_POS, ImVec2(x, VIEW_SIZE.y) + VIEW_POS, GRID_COLOR);
for (float y = fmodf(offset.y, GRID_SY); y < VIEW_SIZE.y; y += GRID_SY)
m_DrawList->AddLine(ImVec2(0.0f, y) + VIEW_POS, ImVec2(VIEW_SIZE.x, y) + VIEW_POS, GRID_COLOR);
}
# endif
# if 0
{
auto userChannel = drawList->_Splitter._Count;
auto channelsToCopy = c_UserLayersCount;
ImDrawList_ChannelsGrow(drawList, userChannel + channelsToCopy);
for (int i = 0; i < channelsToCopy; ++i)
ImDrawList_SwapChannels(drawList, userChannel + i, c_UserLayerChannelStart + i);
}
# endif
# if 0
{
auto preOffset = ImVec2(0, 0);
auto postOffset = m_OldCanvas.WindowScreenPos + m_OldCanvas.ClientOrigin;
auto scale = m_OldCanvas.Zoom;
ImDrawList_TransformChannels(drawList, 0, 1, preOffset, scale, postOffset);
ImDrawList_TransformChannels(drawList, c_BackgroundChannelStart, drawList->_ChannelsCount - 1, preOffset, scale, postOffset);
auto clipTranslation = m_OldCanvas.WindowScreenPos - m_OldCanvas.FromScreen(m_OldCanvas.WindowScreenPos);
ImGui::PushClipRect(m_OldCanvas.WindowScreenPos + ImVec2(1, 1), m_OldCanvas.WindowScreenPos + m_OldCanvas.WindowScreenSize - ImVec2(1, 1), false);
ImDrawList_TranslateAndClampClipRects(drawList, 0, 1, clipTranslation);
ImDrawList_TranslateAndClampClipRects(drawList, c_BackgroundChannelStart, drawList->_ChannelsCount - 1, clipTranslation);
ImGui::PopClipRect();
// #debug: Static grid in local space
//for (float x = 0; x < Canvas.WindowScreenSize.x; x += 100)
// drawList->AddLine(ImVec2(x, 0.0f) + Canvas.WindowScreenPos, ImVec2(x, Canvas.WindowScreenSize.y) + Canvas.WindowScreenPos, IM_COL32(255, 0, 0, 128));
//for (float y = 0; y < Canvas.WindowScreenSize.y; y += 100)
// drawList->AddLine(ImVec2(0.0f, y) + Canvas.WindowScreenPos, ImVec2(Canvas.WindowScreenSize.x, y) + Canvas.WindowScreenPos, IM_COL32(255, 0, 0, 128));
}
# endif
# if 1
// Move user and hint channels to top
{
// Clip plane is transformed to global space.
// These channels already have clip planes in global space, so
// we move them to clip plane. Batch transformation in canvas
// will bring them back to global space.
auto preTransformClipRect = [this](int channelIndex)
{
ImDrawChannel& channel = m_DrawList->_Splitter._Channels[channelIndex];
for (ImDrawCmd& cmd : channel._CmdBuffer)
{
auto a = ToCanvas(ImVec2(cmd.ClipRect.x, cmd.ClipRect.y));
auto b = ToCanvas(ImVec2(cmd.ClipRect.z, cmd.ClipRect.w));
cmd.ClipRect = ImVec4(a.x, a.y, b.x, b.y);
}
};
m_DrawList->ChannelsSetCurrent(0);
auto channelCount = m_DrawList->_Splitter._Count;
ImDrawList_ChannelsGrow(m_DrawList, channelCount + 3);
ImDrawList_SwapChannels(m_DrawList, c_UserChannel_HintsBackground, channelCount + 0);
ImDrawList_SwapChannels(m_DrawList, c_UserChannel_Hints, channelCount + 1);
ImDrawList_SwapChannels(m_DrawList, c_UserChannel_Content, channelCount + 2);
preTransformClipRect(channelCount + 0);
preTransformClipRect(channelCount + 1);
preTransformClipRect(channelCount + 2);
}
# endif
UpdateAnimations();
m_DrawList->ChannelsMerge();
// #debug
// drawList->AddRectFilled(ImVec2(-10.0f, -10.0f), ImVec2(10.0f, 10.0f), IM_COL32(255, 0, 255, 255));
// ImGui::EndChild();
// ImGui::PopStyleColor();
if (m_IsCanvasVisible)
m_Canvas.End();
ImDrawList_SwapSplitter(m_DrawList, m_Splitter);
// Draw border
{
auto& style = ImGui::GetStyle();
auto borderShadoColor = style.Colors[ImGuiCol_BorderShadow];
auto borderColor = style.Colors[ImGuiCol_Border];
m_DrawList->AddRect(m_Canvas.Rect().Min + ImVec2(1, 1), m_Canvas.Rect().Max - ImVec2(1, 1), ImColor(borderShadoColor));
m_DrawList->AddRect(m_Canvas.Rect().Min, m_Canvas.Rect().Max, ImColor(borderColor));
}
// #metrics
// ShowMetrics(control);
ImGui::PopID();
if (!m_CurrentAction && m_IsFirstFrame && !m_Settings.m_Selection.empty())
{
ClearSelection();
for (auto id : m_Settings.m_Selection)
if (auto object = FindObject(id))
SelectObject(object);
}
if (HasSelectionChanged())
MakeDirty(SaveReasonFlags::Selection);
if (m_Settings.m_IsDirty && !m_CurrentAction)
SaveSettings();
m_DrawList = nullptr;
m_IsFirstFrame = false;
}
bool ed::EditorContext::DoLink(LinkId id, PinId startPinId, PinId endPinId, ImU32 color, float thickness)
{
//auto& editorStyle = GetStyle();
auto startPin = FindPin(startPinId);
auto endPin = FindPin(endPinId);
if (!startPin || !startPin->m_IsLive || !endPin || !endPin->m_IsLive)
return false;
startPin->m_HasConnection = true;
endPin->m_HasConnection = true;
auto link = GetLink(id);
link->m_StartPin = startPin;
link->m_EndPin = endPin;
link->m_Color = color;
link->m_HighlightColor= GetColor(StyleColor_HighlightLinkBorder);
link->m_Thickness = thickness;
link->m_IsLive = true;
link->UpdateEndpoints();
return true;
}
void ed::EditorContext::SetNodePosition(NodeId nodeId, const ImVec2& position)
{
auto node = FindNode(nodeId);
if (!node)
{
node = CreateNode(nodeId);
node->m_IsLive = false;
}
if (node->m_Bounds.Min != position)
{
node->m_Bounds.Translate(position - node->m_Bounds.Min);
node->m_Bounds.Floor();
MakeDirty(NodeEditor::SaveReasonFlags::Position, node);
}
}
void ed::EditorContext::SetGroupSize(NodeId nodeId, const ImVec2& size)
{
auto node = FindNode(nodeId);
if (!node)
{
node = CreateNode(nodeId);
node->m_IsLive = false;
}
node->m_Type = NodeType::Group;
if (node->m_GroupBounds.GetSize() != size)
{
node->m_GroupBounds.Min = node->m_Bounds.Min;
node->m_GroupBounds.Max = node->m_Bounds.Min + size;
node->m_GroupBounds.Floor();
MakeDirty(NodeEditor::SaveReasonFlags::Size, node);
}
}
ImVec2 ed::EditorContext::GetNodePosition(NodeId nodeId)
{
auto node = FindNode(nodeId);
if (!node)
return ImVec2(FLT_MAX, FLT_MAX);
return node->m_Bounds.Min;
}
ImVec2 ed::EditorContext::GetNodeSize(NodeId nodeId)
{
auto node = FindNode(nodeId);
if (!node)
return ImVec2(0, 0);
return node->m_Bounds.GetSize();
}
void ed::EditorContext::SetNodeZPosition(NodeId nodeId, float z)
{
auto node = FindNode(nodeId);
if (!node)
{
node = CreateNode(nodeId);
node->m_IsLive = false;
}
node->m_ZPosition = z;
}
float ed::EditorContext::GetNodeZPosition(NodeId nodeId)
{
auto node = FindNode(nodeId);
if (!node)
return 0.0f;
return node->m_ZPosition;
}
void ed::EditorContext::MarkNodeToRestoreState(Node* node)
{
node->m_RestoreState = true;
}
void ed::EditorContext::UpdateNodeState(Node* node)
{
bool tryLoadState = node->m_RestoreState;
node->m_RestoreState = false;
auto settings = m_Settings.FindNode(node->m_ID);
if (!settings)
return;
if (!tryLoadState && settings->m_WasUsed)
return;
if (!settings->m_WasUsed)
{
MakeDirty(SaveReasonFlags::AddNode, node);
settings->m_WasUsed = true;
}
// Load state from config (if possible)
if (tryLoadState)
{
NodeSettings newSettings = *settings;
if (NodeSettings::Parse(m_Config.LoadNode(node->m_ID), newSettings))
*settings = newSettings;
}
node->m_Bounds.Min = settings->m_Location;
node->m_Bounds.Max = node->m_Bounds.Min + settings->m_Size;
node->m_Bounds.Floor();
node->m_GroupBounds.Min = settings->m_Location;
node->m_GroupBounds.Max = node->m_GroupBounds.Min + settings->m_GroupSize;
node->m_GroupBounds.Floor();
}
void ed::EditorContext::RemoveSettings(Object* object)
{
if (auto node = object->AsNode())
{
m_Settings.RemoveNode(node->m_ID);
MakeDirty(SaveReasonFlags::RemoveNode, node);
}
}
void ed::EditorContext::ClearSelection()
{
for (auto& object : m_SelectedObjects)
object->m_IsSelected = false;
m_SelectedObjects.clear();
}
void ed::EditorContext::SelectObject(Object* object)
{
m_SelectedObjects.push_back(object);
object->m_IsSelected = true;
}
void ed::EditorContext::DeselectObject(Object* object)
{
auto objectIt = std::find(m_SelectedObjects.begin(), m_SelectedObjects.end(), object);
if (objectIt == m_SelectedObjects.end())
return;
object->m_IsSelected = false;
m_SelectedObjects.erase(objectIt);
}
void ed::EditorContext::SetSelectedObject(Object* object)
{
ClearSelection();
SelectObject(object);
}
void ed::EditorContext::ToggleObjectSelection(Object* object)
{
if (IsSelected(object))
DeselectObject(object);
else
SelectObject(object);
}
bool ed::EditorContext::IsSelected(Object* object)
{
return object && object->m_IsSelected;
// return std::find(m_SelectedObjects.begin(), m_SelectedObjects.end(), object) != m_SelectedObjects.end();
}
const ed::vector<ed::Object*>& ed::EditorContext::GetSelectedObjects()
{
return m_SelectedObjects;
}
bool ed::EditorContext::IsAnyNodeSelected()
{
for (auto object : m_SelectedObjects)
if (object->AsNode())
return true;
return false;
}
bool ed::EditorContext::IsAnyLinkSelected()
{
for (auto object : m_SelectedObjects)
if (object->AsLink())
return true;
return false;
}
bool ed::EditorContext::HasSelectionChanged()
{
return m_LastSelectedObjects != m_SelectedObjects;
}
ed::Node* ed::EditorContext::FindNodeAt(const ImVec2& p)
{
for (auto node : m_Nodes)
if (node->TestHit(p))
return node;
return nullptr;
}
void ed::EditorContext::FindNodesInRect(const ImRect& r, vector<Node*>& result, bool append, bool includeIntersecting)
{
if (!append)
result.resize(0);
if (ImRect_IsEmpty(r))
return;
for (auto node : m_Nodes)
if (node->TestHit(r, includeIntersecting))
result.push_back(node);
}
void ed::EditorContext::FindLinksInRect(const ImRect& r, vector<Link*>& result, bool append)
{
if (!append)
result.resize(0);
if (ImRect_IsEmpty(r))
return;
for (auto link : m_Links)
if (link->TestHit(r))
result.push_back(link);
}
bool ed::EditorContext::HasAnyLinks(NodeId nodeId) const
{
for (auto link : m_Links)
{
if (!link->m_IsLive)
continue;
if (link->m_StartPin->m_Node->m_ID == nodeId || link->m_EndPin->m_Node->m_ID == nodeId)
return true;
}
return false;
}
bool ed::EditorContext::HasAnyLinks(PinId pinId) const
{
for (auto link : m_Links)
{
if (!link->m_IsLive)
continue;
if (link->m_StartPin->m_ID == pinId || link->m_EndPin->m_ID == pinId)
return true;
}
return false;
}
int ed::EditorContext::BreakLinks(NodeId nodeId)
{
int result = 0;
for (auto link : m_Links)
{
if (!link->m_IsLive)
continue;
if (link->m_StartPin->m_Node->m_ID == nodeId || link->m_EndPin->m_Node->m_ID == nodeId)
{
if (GetItemDeleter().Add(link))
++result;
}
}
return result;
}
int ed::EditorContext::BreakLinks(PinId pinId)
{
int result = 0;
for (auto link : m_Links)
{
if (!link->m_IsLive)
continue;
if (link->m_StartPin->m_ID == pinId || link->m_EndPin->m_ID == pinId)
{
if (GetItemDeleter().Add(link))
++result;
}
}
return result;
}
void ed::EditorContext::FindLinksForNode(NodeId nodeId, vector<Link*>& result, bool add)
{
if (!add)
result.clear();
for (auto link : m_Links)
{
if (!link->m_IsLive)
continue;
if (link->m_StartPin->m_Node->m_ID == nodeId || link->m_EndPin->m_Node->m_ID == nodeId)
result.push_back(link);
}
}
bool ed::EditorContext::PinHadAnyLinks(PinId pinId)
{
auto pin = FindPin(pinId);
if (!pin || !pin->m_IsLive)
return false;
return pin->m_HasConnection || pin->m_HadConnection;
}
void ed::EditorContext::NotifyLinkDeleted(Link* link)
{
if (m_LastActiveLink == link)
m_LastActiveLink = nullptr;
}
void ed::EditorContext::Suspend(SuspendFlags flags)
{
IM_ASSERT(m_DrawList != nullptr && "Suspend was called outiside of Begin/End.");
auto lastChannel = m_DrawList->_Splitter._Current;
m_DrawList->ChannelsSetCurrent(m_ExternalChannel);
if (m_IsCanvasVisible)
m_Canvas.Suspend();
m_DrawList->ChannelsSetCurrent(lastChannel);
if ((flags & SuspendFlags::KeepSplitter) != SuspendFlags::KeepSplitter)
ImDrawList_SwapSplitter(m_DrawList, m_Splitter);
}
void ed::EditorContext::Resume(SuspendFlags flags)
{
IM_ASSERT(m_DrawList != nullptr && "Reasume was called outiside of Begin/End.");
if ((flags & SuspendFlags::KeepSplitter) != SuspendFlags::KeepSplitter)
ImDrawList_SwapSplitter(m_DrawList, m_Splitter);
auto lastChannel = m_DrawList->_Splitter._Current;
m_DrawList->ChannelsSetCurrent(m_ExternalChannel);
if (m_IsCanvasVisible)
m_Canvas.Resume();
m_DrawList->ChannelsSetCurrent(lastChannel);
}
bool ed::EditorContext::IsSuspended()
{
return m_Canvas.IsSuspended();
}
bool ed::EditorContext::IsFocused()
{
return m_IsFocused;
}
bool ed::EditorContext::IsHovered() const
{
return m_IsHovered;
}
bool ed::EditorContext::IsHoveredWithoutOverlapp() const
{
return m_IsHoveredWithoutOverlapp;
}
bool ed::EditorContext::CanAcceptUserInput() const
{
return m_IsFocused && m_IsHovered;
}
int ed::EditorContext::CountLiveNodes() const
{
return (int)std::count_if(m_Nodes.begin(), m_Nodes.end(), [](const Node* node) { return node->m_IsLive; });
}
int ed::EditorContext::CountLivePins() const
{
return (int)std::count_if(m_Pins.begin(), m_Pins.end(), [](const Pin* pin) { return pin->m_IsLive; });
}
int ed::EditorContext::CountLiveLinks() const
{
return (int)std::count_if(m_Links.begin(), m_Links.end(), [](const Link* link) { return link->m_IsLive; });
}
ed::Pin* ed::EditorContext::CreatePin(PinId id, PinKind kind)
{
IM_ASSERT(nullptr == FindObject(id));
auto pin = new Pin(this, id, kind);
m_Pins.push_back({id, pin});
std::sort(m_Pins.begin(), m_Pins.end());
return pin;
}
ed::Node* ed::EditorContext::CreateNode(NodeId id)
{
IM_ASSERT(nullptr == FindObject(id));
auto node = new Node(this, id);
m_Nodes.push_back({id, node});
//std::sort(Nodes.begin(), Nodes.end());
auto settings = m_Settings.FindNode(id);
if (!settings)
settings = m_Settings.AddNode(id);
UpdateNodeState(node);
if (settings->m_GroupSize.x > 0 || settings->m_GroupSize.y > 0)
node->m_Type = NodeType::Group;
node->m_IsLive = false;
return node;
}
ed::Link* ed::EditorContext::CreateLink(LinkId id)
{
IM_ASSERT(nullptr == FindObject(id));
auto link = new Link(this, id);
m_Links.push_back({id, link});
std::sort(m_Links.begin(), m_Links.end());
return link;
}
template <typename C, typename Id>
static inline auto FindItemInLinear(C& container, Id id)
{
# if defined(_DEBUG)
auto start = container.data();
auto end = container.data() + container.size();
for (auto it = start; it < end; ++it)
if ((*it).m_ID == id)
return it->m_Object;
# else
for (auto item : container)
if (item.m_ID == id)
return item.m_Object;
# endif
return static_cast<decltype(container[0].m_Object)>(nullptr);
}
template <typename C, typename Id>
static inline auto FindItemIn(C& container, Id id)
{
//# if defined(_DEBUG)
// auto start = container.data();
// auto end = container.data() + container.size();
// for (auto it = start; it < end; ++it)
// if ((*it)->ID == id)
// return *it;
//# else
// for (auto item : container)
// if (item->ID == id)
// return item;
//# endif
auto key = typename C::value_type{ id, nullptr };
auto first = container.cbegin();
auto last = container.cend();
auto it = std::lower_bound(first, last, key);
if (it != last && (key.m_ID == it->m_ID))
return it->m_Object;
else
return static_cast<decltype(it->m_Object)>(nullptr);
}
ed::Node* ed::EditorContext::FindNode(NodeId id)
{
return FindItemInLinear(m_Nodes, id);
}
ed::Pin* ed::EditorContext::FindPin(PinId id)
{
return FindItemIn(m_Pins, id);
}
ed::Link* ed::EditorContext::FindLink(LinkId id)
{
return FindItemIn(m_Links, id);
}
ed::Object* ed::EditorContext::FindObject(ObjectId id)
{
if (id.IsNodeId())
return FindNode(id.AsNodeId());
else if (id.IsLinkId())
return FindLink(id.AsLinkId());
else if (id.IsPinId())
return FindPin(id.AsPinId());
else
return nullptr;
}
ed::Node* ed::EditorContext::GetNode(NodeId id)
{
auto node = FindNode(id);
if (!node)
node = CreateNode(id);
return node;
}
ed::Pin* ed::EditorContext::GetPin(PinId id, PinKind kind)
{
if (auto pin = FindPin(id))
{
pin->m_Kind = kind;
return pin;
}
else
return CreatePin(id, kind);
}
ed::Link* ed::EditorContext::GetLink(LinkId id)
{
if (auto link = FindLink(id))
return link;
else
return CreateLink(id);
}
void ed::EditorContext::LoadSettings()
{
ed::Settings::Parse(m_Config.Load(), m_Settings);
if (ImRect_IsEmpty(m_Settings.m_VisibleRect))
{
m_NavigateAction.m_Scroll = m_Settings.m_ViewScroll;
m_NavigateAction.m_Zoom = m_Settings.m_ViewZoom;
}
else
{
m_NavigateAction.NavigateTo(m_Settings.m_VisibleRect, NavigateAction::ZoomMode::Exact, 0.0f);
}
}
void ed::EditorContext::SaveSettings()
{
m_Config.BeginSave();
for (auto& node : m_Nodes)
{
auto settings = m_Settings.FindNode(node->m_ID);
settings->m_Location = node->m_Bounds.Min;
settings->m_Size = node->m_Bounds.GetSize();
if (IsGroup(node))
settings->m_GroupSize = node->m_GroupBounds.GetSize();
if (!node->m_RestoreState && settings->m_IsDirty && m_Config.SaveNodeSettings)
{
if (m_Config.SaveNode(node->m_ID, settings->Serialize().dump(), settings->m_DirtyReason))
settings->ClearDirty();
}
}
m_Settings.m_Selection.resize(0);
for (auto& object : m_SelectedObjects)
m_Settings.m_Selection.push_back(object->ID());
m_Settings.m_ViewScroll = m_NavigateAction.m_Scroll;
m_Settings.m_ViewZoom = m_NavigateAction.m_Zoom;
m_Settings.m_VisibleRect = m_NavigateAction.m_VisibleRect;
if (m_Config.Save(m_Settings.Serialize(), m_Settings.m_DirtyReason))
m_Settings.ClearDirty();
m_Config.EndSave();
}
void ed::EditorContext::MakeDirty(SaveReasonFlags reason)
{
m_Settings.MakeDirty(reason);
}
void ed::EditorContext::MakeDirty(SaveReasonFlags reason, Node* node)
{
m_Settings.MakeDirty(reason, node);
}
ed::Link* ed::EditorContext::FindLinkAt(const ImVec2& p)
{
for (auto& link : m_Links)
if (link->TestHit(p, c_LinkSelectThickness))
return link;
return nullptr;
}
ImU32 ed::EditorContext::GetColor(StyleColor colorIndex) const
{
return ImColor(m_Style.Colors[colorIndex]);
}
ImU32 ed::EditorContext::GetColor(StyleColor colorIndex, float alpha) const
{
auto color = m_Style.Colors[colorIndex];
return ImColor(color.x, color.y, color.z, color.w * alpha);
}
int ed::EditorContext::GetNodeIds(NodeId* nodes, int size) const
{
if (size <= 0)
return 0;
int result = 0;
for (auto node : m_Nodes)
{
if (!node->m_IsLive)
continue;
*nodes++ = node->m_ID;
++result;
if (--size == 0)
break;
}
return result;
}
void ed::EditorContext::RegisterAnimation(Animation* animation)
{
m_LiveAnimations.push_back(animation);
}
void ed::EditorContext::UnregisterAnimation(Animation* animation)
{
auto it = std::find(m_LiveAnimations.begin(), m_LiveAnimations.end(), animation);
if (it != m_LiveAnimations.end())
m_LiveAnimations.erase(it);
}
void ed::EditorContext::UpdateAnimations()
{
m_LastLiveAnimations = m_LiveAnimations;
for (auto animation : m_LastLiveAnimations)
{
const bool isLive = (std::find(m_LiveAnimations.begin(), m_LiveAnimations.end(), animation) != m_LiveAnimations.end());
if (isLive)
animation->Update();
}
}
void ed::EditorContext::Flow(Link* link, FlowDirection direction)
{
m_FlowAnimationController.Flow(link, direction);
}
void ed::EditorContext::SetUserContext(bool globalSpace)
{
const auto mousePos = ImGui::GetMousePos();
// Move drawing cursor to mouse location and prepare layer for
// content added by user.
if (globalSpace)
ImGui::SetCursorScreenPos(m_Canvas.FromLocal(mousePos));
else
ImGui::SetCursorScreenPos(m_Canvas.FromLocal(mousePos));
//ImGui::SetCursorScreenPos(ImFloor(mousePos));
//ImGui::SetCursorScreenPos(ImVec2(floorf(mousePos.x), floorf(mousePos.y)));
if (!IsSuspended())
{
m_DrawList->ChannelsSetCurrent(c_UserChannel_Content);
}
// #debug
// drawList->AddCircleFilled(ImGui::GetMousePos(), 4, IM_COL32(0, 255, 0, 255));
}
void ed::EditorContext::EnableShortcuts(bool enable)
{
m_ShortcutsEnabled = enable;
}
bool ed::EditorContext::AreShortcutsEnabled()
{
return m_ShortcutsEnabled;
}
ed::Control ed::EditorContext::BuildControl(bool allowOffscreen)
{
m_IsHovered = false;
m_IsHoveredWithoutOverlapp = false;
const auto windowHovered = ImGui::IsWindowHovered();
const auto widgetHovered = ImGui::IsMouseHoveringRect(m_Canvas.ViewRect().Min, m_Canvas.ViewRect().Max, true);
if (!allowOffscreen && !windowHovered && !widgetHovered)
return Control();
const auto mousePos = ImGui::GetMousePos();
// Expand clip rectangle to always contain cursor
auto editorRect = m_Canvas.ViewRect();
auto isMouseOffscreen = allowOffscreen && !editorRect.Contains(mousePos);
if (isMouseOffscreen)
{
// Extend clip rect to capture off-screen mouse cursor
editorRect.Add(ImFloor(mousePos));
editorRect.Add(ImVec2(ImCeil(mousePos.x), ImCeil(mousePos.y)));
ImGui::PushClipRect(editorRect.Min, editorRect.Max, false);
}
ImGuiID activeId = 0;
Object* hotObject = nullptr;
Object* activeObject = nullptr;
Object* clickedObject = nullptr;
Object* doubleClickedObject = nullptr;
ImGuiButtonFlags extraFlags = ImGuiButtonFlags_None;
extraFlags |= ImGuiButtonFlags_MouseButtonLeft;
extraFlags |= ImGuiButtonFlags_MouseButtonRight;
extraFlags |= ImGuiButtonFlags_MouseButtonMiddle;
static auto invisibleButtonEx = [](const char* str_id, const ImVec2& size_arg, ImGuiButtonFlags extraFlags) -> int
{
using namespace ImGui;
ImGuiWindow* window = GetCurrentWindow();
if (window->SkipItems)
return -1;
if (size_arg.x == 0.0f || size_arg.y == 0.0f)
return false;
const ImGuiID id = window->GetID(str_id);
ImVec2 size = CalcItemSize(size_arg, 0.0f, 0.0f);
const ImRect bb(window->DC.CursorPos, window->DC.CursorPos + size);
ItemSize(size);
if (!ItemAdd(bb, id))
return -1;
auto buttonIndex = ImGui::GetCurrentContext()->ActiveIdMouseButton;
bool hovered, held;
bool pressed = ButtonBehavior(bb, id, &hovered, &held, extraFlags);
return pressed ? buttonIndex : -1;
};
// Emits invisible button and returns true if it is clicked.
auto emitInteractiveAreaEx = [&activeId](ObjectId id, const ImRect& rect, ImGuiButtonFlags extraFlags) -> int
{
char idString[33] = { 0 }; // itoa can output 33 bytes maximum
snprintf(idString, 32, "%p", id.AsPointer());
ImGui::SetCursorScreenPos(rect.Min);
// debug
//if (id < 0) return ImGui::Button(idString, to_imvec(rect.size));
auto buttonIndex = invisibleButtonEx(idString, rect.GetSize(), extraFlags);
// #debug
//ImGui::GetWindowDrawList()->AddRectFilled(ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), IM_COL32(0, 255, 0, 64));
if (ImGui::IsItemActive())
activeId = ImGui::GetActiveID();
return buttonIndex;
};
auto emitInteractiveArea = [&emitInteractiveAreaEx, extraFlags](ObjectId id, const ImRect& rect)
{
return emitInteractiveAreaEx(id, rect, extraFlags);
};
// Check input interactions over area.
auto checkInteractionsInArea = [this, &emitInteractiveArea, &hotObject, &activeObject, &clickedObject, &doubleClickedObject](ObjectId id, const ImRect& rect, Object* object)
{
if (emitInteractiveArea(id, rect) >= 0)
clickedObject = object;
if (!doubleClickedObject && ImGui::IsMouseDoubleClicked(m_Config.DragButtonIndex) && ImGui::IsItemHovered())
doubleClickedObject = object;
if (!hotObject && ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem))
hotObject = object;
if (ImGui::IsItemActive())
activeObject = object;
};
// Process live nodes and pins.
for (auto nodeIt = m_Nodes.rbegin(), nodeItEnd = m_Nodes.rend(); nodeIt != nodeItEnd; ++nodeIt)
{
auto node = *nodeIt;
if (!node->m_IsLive) continue;
// Check for interactions with live pins in node before
// processing node itself. Pins does not overlap each other
// and all are within node bounds.
for (auto pin = node->m_LastPin; pin; pin = pin->m_PreviousPin)
{
if (!pin->m_IsLive) continue;
checkInteractionsInArea(pin->m_ID, pin->m_Bounds, pin);
}
// Check for interactions with node.
if (node->m_Type == NodeType::Group)
{
// Node with a hole
ImGui::PushID(node->m_ID.AsPointer());
static const NodeRegion c_Regions[] =
{
NodeRegion::TopLeft,
NodeRegion::TopRight,
NodeRegion::BottomLeft,
NodeRegion::BottomRight,
NodeRegion::Top,
NodeRegion::Bottom,
NodeRegion::Left,
NodeRegion::Right,
NodeRegion::Header,
};
for (auto region : c_Regions)
{
auto bounds = node->GetRegionBounds(region);
if (ImRect_IsEmpty(bounds))
continue;
checkInteractionsInArea(NodeId(static_cast<int>(region)), bounds, node);
}
ImGui::PopID();
}
else
checkInteractionsInArea(node->m_ID, node->m_Bounds, node);
}
// Links are not regular widgets and must be done manually since
// ImGui does not support interactive elements with custom hit maps.
//
// Links can steal input from background.
// Links are just over background. So if anything else
// is hovered we can skip them.
if (nullptr == hotObject)
hotObject = FindLinkAt(mousePos);
ImGuiButtonFlags backgroundExtraFlags = ImGuiButtonFlags_None;
if (m_Config.DragButtonIndex == 0 || m_Config.SelectButtonIndex == 0 || m_Config.NavigateButtonIndex == 0)
backgroundExtraFlags |= ImGuiButtonFlags_MouseButtonLeft;
if (m_Config.DragButtonIndex == 1 || m_Config.SelectButtonIndex == 1 || m_Config.NavigateButtonIndex == 1)
backgroundExtraFlags |= ImGuiButtonFlags_MouseButtonRight;
if (m_Config.DragButtonIndex == 2 || m_Config.SelectButtonIndex == 2 || m_Config.NavigateButtonIndex == 2)
backgroundExtraFlags |= ImGuiButtonFlags_MouseButtonMiddle;
auto isMouseDoubleClickOverBackground = [doubleClickedObject, backgroundExtraFlags]() -> int
{
if (doubleClickedObject)
return -1;
if (!ImGui::IsItemHovered())
return -1;
if ((backgroundExtraFlags & ImGuiButtonFlags_MouseButtonLeft) && ImGui::IsMouseDoubleClicked(ImGuiMouseButton_Left))
return ImGuiButtonFlags_MouseButtonLeft;
if ((backgroundExtraFlags & ImGuiButtonFlags_MouseButtonRight) && ImGui::IsMouseDoubleClicked(ImGuiButtonFlags_MouseButtonRight))
return ImGuiButtonFlags_MouseButtonRight;
if ((backgroundExtraFlags & ImGuiButtonFlags_MouseButtonMiddle) && ImGui::IsMouseDoubleClicked(ImGuiButtonFlags_MouseButtonMiddle))
return ImGuiButtonFlags_MouseButtonMiddle;
return -1;
};
// Check for interaction with background.
auto backgroundClickButonIndex = emitInteractiveAreaEx(NodeId(0), editorRect, backgroundExtraFlags);
auto backgroundDoubleClickButtonIndex = isMouseDoubleClickOverBackground();
auto isBackgroundActive = ImGui::IsItemActive();
auto isBackgroundHot = !hotObject;
auto isDragging = ImGui::IsMouseDragging(0, 1) || ImGui::IsMouseDragging(1, 1) || ImGui::IsMouseDragging(2, 1);
if (backgroundDoubleClickButtonIndex >= 0)
backgroundClickButonIndex = -1;
if (isMouseOffscreen)
ImGui::PopClipRect();
// Process link input using background interactions.
auto hotLink = hotObject ? hotObject->AsLink() : nullptr;
// ImGui take care of tracking active items. With link
// we must do this ourself.
if (!isDragging && isBackgroundActive && hotLink && !m_LastActiveLink)
m_LastActiveLink = hotLink;
if (isBackgroundActive && m_LastActiveLink)
{
activeObject = m_LastActiveLink;
isBackgroundActive = false;
}
else if (!isBackgroundActive && m_LastActiveLink)
m_LastActiveLink = nullptr;
// Steal click from backgrounds if link is hovered.
if (!isDragging && backgroundClickButonIndex >= 0 && hotLink)
{
clickedObject = hotLink;
backgroundClickButonIndex = -1;
}
// Steal double-click from backgrounds if link is hovered.
if (!isDragging && backgroundDoubleClickButtonIndex >= 0 && hotLink)
{
doubleClickedObject = hotLink;
backgroundDoubleClickButtonIndex = -1;
}
if (activeId)
m_EditorActiveId = activeId;
if (ImGui::IsAnyItemActive() && ImGui::GetActiveID() != m_EditorActiveId)
return Control();
m_IsHovered = ImGui::IsItemHovered(ImGuiHoveredFlags_RectOnly);
m_IsHoveredWithoutOverlapp = ImGui::IsItemHovered();
if (!allowOffscreen && !m_IsHovered)
return Control();
# if IMGUI_VERSION_NUM >= 18836
if (m_IsHoveredWithoutOverlapp)
ImGui::SetItemKeyOwner(ImGuiKey_MouseWheelY);
# elif IMGUI_VERSION_NUM >= 17909
if (m_IsHoveredWithoutOverlapp)
ImGui::SetItemUsingMouseWheel();
# endif
return Control(hotObject, activeObject, clickedObject, doubleClickedObject,
isBackgroundHot, isBackgroundActive, backgroundClickButonIndex, backgroundDoubleClickButtonIndex);
}
void ed::EditorContext::ShowMetrics(const Control& control)
{
auto& io = ImGui::GetIO();
auto getObjectName = [](Object* object)
{
if (!object) return "";
else if (object->AsNode()) return "Node";
else if (object->AsPin()) return "Pin";
else if (object->AsLink()) return "Link";
else return "";
};
auto getHotObjectName = [&control, &getObjectName]()
{
if (control.HotObject)
return getObjectName(control.HotObject);
else if (control.BackgroundHot)
return "Background";
else
return "<unknown>";
};
auto getActiveObjectName = [&control, &getObjectName]()
{
if (control.ActiveObject)
return getObjectName(control.ActiveObject);
else if (control.BackgroundActive)
return "Background";
else
return "<unknown>";
};
auto liveNodeCount = CountLiveNodes();
auto livePinCount = CountLivePins();
auto liveLinkCount = CountLiveLinks();
auto canvasRect = m_Canvas.Rect();
auto viewRect = m_Canvas.ViewRect();
auto localMousePos = m_Canvas.ToLocal(io.MousePos);
auto globalMousePos = io.MousePos;
ImGui::SetCursorScreenPos(canvasRect.Min + ImVec2(5, 5));
ImGui::BeginGroup();
ImGui::Text("Is Focused: %s", m_IsFocused ? "true" : "false");
ImGui::Text("Is Hovered: %s", m_IsHovered ? "true" : "false");
ImGui::Text("Is Hovered (without overlapp): %s", m_IsHoveredWithoutOverlapp ? "true" : "false");
ImGui::Text("Accept Input: %s", CanAcceptUserInput() ? "true" : "false");
ImGui::Text("View Position: { x=%g y=%g }", viewRect.Min.x, viewRect.Min.y);
ImGui::Text("View Size: { w=%g h=%g }", viewRect.GetWidth(), viewRect.GetHeight());
ImGui::Text("Canvas Size: { w=%g h=%g }", canvasRect.GetWidth(), canvasRect.GetHeight());
ImGui::Text("Mouse: { x=%.0f y=%.0f } global: { x=%g y=%g }", localMousePos.x, localMousePos.y, globalMousePos.x, globalMousePos.y);
ImGui::Text("Live Nodes: %d", liveNodeCount);
ImGui::Text("Live Pins: %d", livePinCount);
ImGui::Text("Live Links: %d", liveLinkCount);
ImGui::Text("Hot Object: %s (%p)", getHotObjectName(), control.HotObject ? control.HotObject->ID().AsPointer() : nullptr);
if (auto node = control.HotObject ? control.HotObject->AsNode() : nullptr)
{
ImGui::SameLine();
ImGui::Text("{ x=%g y=%g w=%g h=%g }", node->m_Bounds.Min.x, node->m_Bounds.Min.y, node->m_Bounds.GetWidth(), node->m_Bounds.GetHeight());
}
ImGui::Text("Active Object: %s (%p)", getActiveObjectName(), control.ActiveObject ? control.ActiveObject->ID().AsPointer() : nullptr);
if (auto node = control.ActiveObject ? control.ActiveObject->AsNode() : nullptr)
{
ImGui::SameLine();
ImGui::Text("{ x=%g y=%g w=%g h=%g }", node->m_Bounds.Min.x, node->m_Bounds.Min.y, node->m_Bounds.GetWidth(), node->m_Bounds.GetHeight());
}
ImGui::Text("Action: %s", m_CurrentAction ? m_CurrentAction->GetName() : "<none>");
ImGui::Text("Action Is Dragging: %s", m_CurrentAction && m_CurrentAction->IsDragging() ? "Yes" : "No");
m_NavigateAction.ShowMetrics();
m_SizeAction.ShowMetrics();
m_DragAction.ShowMetrics();
m_SelectAction.ShowMetrics();
m_ContextMenuAction.ShowMetrics();
m_CreateItemAction.ShowMetrics();
m_DeleteItemsAction.ShowMetrics();
ImGui::EndGroup();
}
//------------------------------------------------------------------------------
//
// Node Settings
//
//------------------------------------------------------------------------------
void ed::NodeSettings::ClearDirty()
{
m_IsDirty = false;
m_DirtyReason = SaveReasonFlags::None;
}
void ed::NodeSettings::MakeDirty(SaveReasonFlags reason)
{
m_IsDirty = true;
m_DirtyReason = m_DirtyReason | reason;
}
ed::json::value ed::NodeSettings::Serialize()
{
json::value result;
result["location"]["x"] = m_Location.x;
result["location"]["y"] = m_Location.y;
if (m_GroupSize.x > 0 || m_GroupSize.y > 0)
{
result["group_size"]["x"] = m_GroupSize.x;
result["group_size"]["y"] = m_GroupSize.y;
}
return result;
}
bool ed::NodeSettings::Parse(const std::string& string, NodeSettings& settings)
{
auto settingsValue = json::value::parse(string);
if (settingsValue.is_discarded())
return false;
return Parse(settingsValue, settings);
}
bool ed::NodeSettings::Parse(const json::value& data, NodeSettings& result)
{
if (!data.is_object())
return false;
auto tryParseVector = [](const json::value& v, ImVec2& result) -> bool
{
if (v.is_object())
{
auto xValue = v["x"];
auto yValue = v["y"];
if (xValue.is_number() && yValue.is_number())
{
result.x = static_cast<float>(xValue.get<double>());
result.y = static_cast<float>(yValue.get<double>());
return true;
}
}
return false;
};
if (!tryParseVector(data["location"], result.m_Location))
return false;
if (data.contains("group_size") && !tryParseVector(data["group_size"], result.m_GroupSize))
return false;
return true;
}
//------------------------------------------------------------------------------
//
// Settings
//
//------------------------------------------------------------------------------
ed::NodeSettings* ed::Settings::AddNode(NodeId id)
{
m_Nodes.push_back(NodeSettings(id));
return &m_Nodes.back();
}
ed::NodeSettings* ed::Settings::FindNode(NodeId id)
{
for (auto& settings : m_Nodes)
if (settings.m_ID == id)
return &settings;
return nullptr;
}
void ed::Settings::RemoveNode(NodeId id)
{
auto node = FindNode(id);
if (!node)
return;
*node = NodeSettings(id);
}
void ed::Settings::ClearDirty(Node* node)
{
if (node)
{
auto settings = FindNode(node->m_ID);
IM_ASSERT(settings);
settings->ClearDirty();
}
else
{
m_IsDirty = false;
m_DirtyReason = SaveReasonFlags::None;
for (auto& knownNode : m_Nodes)
knownNode.ClearDirty();
}
}
void ed::Settings::MakeDirty(SaveReasonFlags reason, Node* node)
{
m_IsDirty = true;
m_DirtyReason = m_DirtyReason | reason;
if (node)
{
auto settings = FindNode(node->m_ID);
IM_ASSERT(settings);
settings->MakeDirty(reason);
}
}
std::string ed::Settings::Serialize()
{
json::value result;
auto serializeObjectId = [](ObjectId id)
{
auto value = std::to_string(reinterpret_cast<uintptr_t>(id.AsPointer()));
switch (id.Type())
{
default:
case NodeEditor::Detail::ObjectType::None: return value;
case NodeEditor::Detail::ObjectType::Node: return "node:" + value;
case NodeEditor::Detail::ObjectType::Link: return "link:" + value;
case NodeEditor::Detail::ObjectType::Pin: return "pin:" + value;
}
};
auto& nodes = result["nodes"];
for (auto& node : m_Nodes)
{
if (node.m_WasUsed)
nodes[serializeObjectId(node.m_ID)] = node.Serialize();
}
auto& selection = result["selection"];
for (auto& id : m_Selection)
selection.push_back(serializeObjectId(id));
auto& view = result["view"];
view["scroll"]["x"] = m_ViewScroll.x;
view["scroll"]["y"] = m_ViewScroll.y;
view["zoom"] = m_ViewZoom;
view["visible_rect"]["min"]["x"] = m_VisibleRect.Min.x;
view["visible_rect"]["min"]["y"] = m_VisibleRect.Min.y;
view["visible_rect"]["max"]["x"] = m_VisibleRect.Max.x;
view["visible_rect"]["max"]["y"] = m_VisibleRect.Max.y;
return result.dump();
}
bool ed::Settings::Parse(const std::string& string, Settings& settings)
{
Settings result = settings;
auto settingsValue = json::value::parse(string);
if (settingsValue.is_discarded())
return false;
if (!settingsValue.is_object())
return false;
auto tryParseVector = [](const json::value& v, ImVec2& result) -> bool
{
if (v.is_object() && v.contains("x") && v.contains("y"))
{
auto xValue = v["x"];
auto yValue = v["y"];
if (xValue.is_number() && yValue.is_number())
{
result.x = static_cast<float>(xValue.get<double>());
result.y = static_cast<float>(yValue.get<double>());
return true;
}
}
return false;
};
auto deserializeObjectId = [](const std::string& str)
{
auto separator = str.find_first_of(':');
auto idStart = str.c_str() + ((separator != std::string::npos) ? separator + 1 : 0);
auto id = reinterpret_cast<void*>(strtoull(idStart, nullptr, 10));
if (str.compare(0, separator, "node") == 0)
return ObjectId(NodeId(id));
else if (str.compare(0, separator, "link") == 0)
return ObjectId(LinkId(id));
else if (str.compare(0, separator, "pin") == 0)
return ObjectId(PinId(id));
else
// fallback to old format
return ObjectId(NodeId(id)); //return ObjectId();
};
//auto& settingsObject = settingsValue.get<json::object>();
auto& nodesValue = settingsValue["nodes"];
if (nodesValue.is_object())
{
for (auto& node : nodesValue.get<json::object>())
{
auto id = deserializeObjectId(node.first.c_str()).AsNodeId();
auto nodeSettings = result.FindNode(id);
if (!nodeSettings)
nodeSettings = result.AddNode(id);
NodeSettings::Parse(node.second, *nodeSettings);
}
}
auto& selectionValue = settingsValue["selection"];
if (selectionValue.is_array())
{
const auto selectionArray = selectionValue.get<json::array>();
result.m_Selection.reserve(selectionArray.size());
result.m_Selection.resize(0);
for (auto& selection : selectionArray)
{
if (selection.is_string())
result.m_Selection.push_back(deserializeObjectId(selection.get<json::string>()));
}
}
auto& viewValue = settingsValue["view"];
if (viewValue.is_object())
{
auto& viewScrollValue = viewValue["scroll"];
auto& viewZoomValue = viewValue["zoom"];
if (!tryParseVector(viewScrollValue, result.m_ViewScroll))
result.m_ViewScroll = ImVec2(0, 0);
result.m_ViewZoom = viewZoomValue.is_number() ? static_cast<float>(viewZoomValue.get<double>()) : 1.0f;
if (!viewValue.contains("visible_rect") || !tryParseVector(viewValue["visible_rect"]["min"], result.m_VisibleRect.Min) || !tryParseVector(viewValue["visible_rect"]["max"], result.m_VisibleRect.Max))
result.m_VisibleRect = {};
}
settings = std::move(result);
return true;
}
//------------------------------------------------------------------------------
//
// Animation
//
//------------------------------------------------------------------------------
ed::Animation::Animation(EditorContext* editor):
Editor(editor),
m_State(Stopped),
m_Time(0.0f),
m_Duration(0.0f)
{
}
ed::Animation::~Animation()
{
Stop();
}
void ed::Animation::Play(float duration)
{
if (IsPlaying())
Stop();
m_State = Playing;
if (duration < 0)
duration = 0.0f;
m_Time = 0.0f;
m_Duration = duration;
OnPlay();
Editor->RegisterAnimation(this);
if (duration == 0.0f)
Finish();
}
void ed::Animation::Stop()
{
if (!IsPlaying())
return;
m_State = Stopped;
Editor->UnregisterAnimation(this);
OnStop();
}
void ed::Animation::Finish()
{
if (!IsPlaying())
return;
OnFinish();
Stop();
}
void ed::Animation::Update()
{
if (!IsPlaying())
return;
m_Time += ImMax(0.0f, ImGui::GetIO().DeltaTime);
if (m_Time < m_Duration)
{
const float progress = GetProgress();
OnUpdate(progress);
}
else
{
OnFinish();
Stop();
}
}
//------------------------------------------------------------------------------
//
// Navigate Animation
//
//------------------------------------------------------------------------------
ed::NavigateAnimation::NavigateAnimation(EditorContext* editor, NavigateAction& scrollAction):
Animation(editor),
Action(scrollAction)
{
}
void ed::NavigateAnimation::NavigateTo(const ImRect& target, float duration)
{
Stop();
m_Start = Action.GetViewRect();
m_Target = target;
// Skip tiny animations
auto minoffset = m_Target.Min - m_Start.Min;
auto maxOffset = m_Target.Max - m_Start.Max;
auto epsilon = 1e-4f;
if (ImFabs(minoffset.x) < epsilon && ImFabs(minoffset.y) < epsilon &&
ImFabs(maxOffset.x) < epsilon && ImFabs(maxOffset.y) < epsilon)
{
duration = 0;
}
Play(duration);
}
void ed::NavigateAnimation::OnUpdate(float progress)
{
ImRect current;
current.Min = ImEasing::EaseOutQuad(m_Start.Min, m_Target.Min - m_Start.Min, progress);
current.Max = ImEasing::EaseOutQuad(m_Start.Max, m_Target.Max - m_Start.Max, progress);
Action.SetViewRect(current);
}
void ed::NavigateAnimation::OnStop()
{
Editor->MakeDirty(SaveReasonFlags::Navigation);
}
void ed::NavigateAnimation::OnFinish()
{
Action.SetViewRect(m_Target);
Editor->MakeDirty(SaveReasonFlags::Navigation);
}
//------------------------------------------------------------------------------
//
// Flow Animation
//
//------------------------------------------------------------------------------
ed::FlowAnimation::FlowAnimation(FlowAnimationController* controller):
Animation(controller->Editor),
Controller(controller),
m_Link(nullptr),
m_Offset(0.0f),
m_PathLength(0.0f)
{
}
void ed::FlowAnimation::Flow(ed::Link* link, float markerDistance, float speed, float duration)
{
Stop();
if (m_Link != link)
{
m_Offset = 0.0f;
ClearPath();
}
if (m_MarkerDistance != markerDistance)
ClearPath();
m_MarkerDistance = markerDistance;
m_Speed = speed;
m_Link = link;
Play(duration);
}
void ed::FlowAnimation::Draw(ImDrawList* drawList)
{
if (!IsPlaying() || !IsLinkValid() || !m_Link->IsVisible())
return;
if (!IsPathValid())
UpdatePath();
m_Offset = fmodf(m_Offset, m_MarkerDistance);
if (m_Offset < 0)
m_Offset += m_MarkerDistance;
const auto progress = GetProgress();
const auto flowAlpha = 1.0f - progress * progress;
const auto flowColor = Editor->GetColor(StyleColor_Flow, flowAlpha);
//const auto flowPath = Link->GetCurve();
m_Link->Draw(drawList, flowColor, 2.0f);
if (IsPathValid())
{
//Offset = 0;
const auto markerAlpha = powf(1.0f - progress, 0.35f);
const auto markerRadius = 4.0f * (1.0f - progress) + 2.0f;
const auto markerColor = Editor->GetColor(StyleColor_FlowMarker, markerAlpha);
for (float d = m_Offset; d < m_PathLength; d += m_MarkerDistance)
drawList->AddCircleFilled(SamplePath(d), markerRadius, markerColor);
}
}
bool ed::FlowAnimation::IsLinkValid() const
{
return m_Link && m_Link->m_IsLive;
}
bool ed::FlowAnimation::IsPathValid() const
{
return m_Path.size() > 1 && m_PathLength > 0.0f && m_Link->m_Start == m_LastStart && m_Link->m_End == m_LastEnd;
}
void ed::FlowAnimation::UpdatePath()
{
if (!IsLinkValid())
{
ClearPath();
return;
}
const auto curve = m_Link->GetCurve();
m_LastStart = m_Link->m_Start;
m_LastEnd = m_Link->m_End;
m_PathLength = ImCubicBezierLength(curve.P0, curve.P1, curve.P2, curve.P3);
auto collectPointsCallback = [this](ImCubicBezierFixedStepSample& result)
{
m_Path.push_back(CurvePoint{ result.Length, result.Point });
};
const auto step = ImMax(m_MarkerDistance * 0.5f, 15.0f);
m_Path.resize(0);
ImCubicBezierFixedStep(collectPointsCallback, curve, step, false, 0.5f, 0.001f);
}
void ed::FlowAnimation::ClearPath()
{
vector<CurvePoint>().swap(m_Path);
m_PathLength = 0.0f;
}
ImVec2 ed::FlowAnimation::SamplePath(float distance) const
{
//distance = ImMax(0.0f, std::min(distance, PathLength));
auto endPointIt = std::find_if(m_Path.begin(), m_Path.end(), [distance](const CurvePoint& p) { return distance < p.Distance; });
if (endPointIt == m_Path.end())
endPointIt = m_Path.end() - 1;
else if (endPointIt == m_Path.begin())
endPointIt = m_Path.begin() + 1;
const auto& start = endPointIt[-1];
const auto& end = *endPointIt;
const auto t = (distance - start.Distance) / (end.Distance - start.Distance);
return start.Point + (end.Point - start.Point) * t;
}
void ed::FlowAnimation::OnUpdate(float progress)
{
IM_UNUSED(progress);
m_Offset += m_Speed * ImGui::GetIO().DeltaTime;
}
void ed::FlowAnimation::OnStop()
{
Controller->Release(this);
}
//------------------------------------------------------------------------------
//
// Flow Animation Controller
//
//------------------------------------------------------------------------------
ed::FlowAnimationController::FlowAnimationController(EditorContext* editor):
AnimationController(editor)
{
}
ed::FlowAnimationController::~FlowAnimationController()
{
for (auto animation : m_Animations)
delete animation;
}
void ed::FlowAnimationController::Flow(Link* link, FlowDirection direction)
{
if (!link || !link->m_IsLive)
return;
auto& editorStyle = GetStyle();
auto animation = GetOrCreate(link);
float speedDirection = 1.0f;
if (direction == FlowDirection::Backward)
speedDirection = -1.0f;
animation->Flow(link, editorStyle.FlowMarkerDistance, editorStyle.FlowSpeed * speedDirection, editorStyle.FlowDuration);
}
void ed::FlowAnimationController::Draw(ImDrawList* drawList)
{
if (m_Animations.empty())
return;
drawList->ChannelsSetCurrent(c_LinkChannel_Flow);
for (auto animation : m_Animations)
animation->Draw(drawList);
}
ed::FlowAnimation* ed::FlowAnimationController::GetOrCreate(Link* link)
{
// Return live animation which match target link
{
auto animationIt = std::find_if(m_Animations.begin(), m_Animations.end(), [link](FlowAnimation* animation) { return animation->m_Link == link; });
if (animationIt != m_Animations.end())
return *animationIt;
}
// There are no live animations for target link, try to reuse inactive old one
if (!m_FreePool.empty())
{
auto animation = m_FreePool.back();
m_FreePool.pop_back();
return animation;
}
// Cache miss, allocate new one
auto animation = new FlowAnimation(this);
m_Animations.push_back(animation);
return animation;
}
void ed::FlowAnimationController::Release(FlowAnimation* animation)
{
IM_UNUSED(animation);
}
//------------------------------------------------------------------------------
//
// Navigate Action
//
//------------------------------------------------------------------------------
const float ed::NavigateAction::s_DefaultZoomLevels[] =
{
0.1f, 0.15f, 0.20f, 0.25f, 0.33f, 0.5f, 0.75f, 1.0f, 1.25f, 1.50f, 2.0f, 2.5f, 3.0f, 4.0f, 5.0f, 6.0f, 7.0f, 8.0f
};
const int ed::NavigateAction::s_DefaultZoomLevelCount = sizeof(s_DefaultZoomLevels) / sizeof(*s_DefaultZoomLevels);
ed::NavigateAction::NavigateAction(EditorContext* editor, ImGuiEx::Canvas& canvas):
EditorAction(editor),
m_IsActive(false),
m_Zoom(1),
m_VisibleRect(),
m_Scroll(0, 0),
m_ScrollStart(0, 0),
m_ScrollDelta(0, 0),
m_Canvas(canvas),
m_WindowScreenPos(0, 0),
m_WindowScreenSize(0, 0),
m_Animation(editor, *this),
m_Reason(NavigationReason::Unknown),
m_LastSelectionId(0),
m_LastObject(nullptr),
m_MovingOverEdge(false),
m_MoveScreenOffset(0, 0),
m_ZoomLevels(editor->GetConfig().CustomZoomLevels.Size > 0 ? editor->GetConfig().CustomZoomLevels.Data : s_DefaultZoomLevels),
m_ZoomLevelCount(editor->GetConfig().CustomZoomLevels.Size > 0 ? editor->GetConfig().CustomZoomLevels.Size : s_DefaultZoomLevelCount)
{
}
ed::EditorAction::AcceptResult ed::NavigateAction::Accept(const Control& control)
{
IM_ASSERT(!m_IsActive);
if (m_IsActive)
return False;
if (Editor->CanAcceptUserInput() /*&& !ImGui::IsAnyItemActive()*/ && ImGui::IsMouseDragging(Editor->GetConfig().NavigateButtonIndex, 0.0f))
{
m_IsActive = true;
m_ScrollStart = m_Scroll;
m_ScrollDelta = ImGui::GetMouseDragDelta(Editor->GetConfig().NavigateButtonIndex);
m_Scroll = m_ScrollStart - m_ScrollDelta * m_Zoom;
}
auto& io = ImGui::GetIO();
if (Editor->CanAcceptUserInput() && ImGui::IsKeyPressed(GetKeyIndexForF()) && Editor->AreShortcutsEnabled())
{
const auto zoomMode = io.KeyShift ? NavigateAction::ZoomMode::WithMargin : NavigateAction::ZoomMode::None;
auto findHotObjectToZoom = [this, &control, &io]() -> Object*
{
if (control.HotObject)
{
if (auto pin = control.HotObject->AsPin())
return pin->m_Node;
else
return control.HotObject;
}
else if (control.BackgroundHot)
{
auto node = Editor->FindNodeAt(io.MousePos);
if (IsGroup(node))
return node;
}
return nullptr;
};
bool navigateToContent = false;
if (!Editor->GetSelectedObjects().empty())
{
if (m_Reason != NavigationReason::Selection || m_LastSelectionId != Editor->GetSelectionId() || (zoomMode != NavigateAction::ZoomMode::None))
{
m_LastSelectionId = Editor->GetSelectionId();
NavigateTo(Editor->GetSelectionBounds(), zoomMode, -1.0f, NavigationReason::Selection);
}
else
navigateToContent = true;
}
else if(auto hotObject = findHotObjectToZoom())
{
if (m_Reason != NavigationReason::Object || m_LastObject != hotObject || (zoomMode != NavigateAction::ZoomMode::None))
{
m_LastObject = hotObject;
auto bounds = hotObject->GetBounds();
NavigateTo(bounds, zoomMode, -1.0f, NavigationReason::Object);
}
else
navigateToContent = true;
}
else
navigateToContent = true;
if (navigateToContent)
NavigateTo(Editor->GetContentBounds(), NavigateAction::ZoomMode::WithMargin, -1.0f, NavigationReason::Content);
}
auto visibleRect = GetViewRect();
if (m_VisibleRect.Min != visibleRect.Min || m_VisibleRect.Max != visibleRect.Max)
{
m_VisibleRect = visibleRect;
Editor->MakeDirty(SaveReasonFlags::Navigation);
}
// // #debug
// if (m_DrawList)
// m_DrawList->AddCircleFilled(io.MousePos, 4.0f, IM_COL32(255, 0, 255, 255));
if (HandleZoom(control))
return True;
return m_IsActive ? True : False;
}
bool ed::NavigateAction::Process(const Control& control)
{
IM_UNUSED(control);
if (!m_IsActive)
return false;
if (ImGui::IsMouseDragging(Editor->GetConfig().NavigateButtonIndex, 0.0f))
{
m_ScrollDelta = ImGui::GetMouseDragDelta(Editor->GetConfig().NavigateButtonIndex);
m_Scroll = m_ScrollStart - m_ScrollDelta * m_Zoom;
m_VisibleRect = GetViewRect();
// if (IsActive && Animation.IsPlaying())
// Animation.Target = Animation.Target - ScrollDelta * Animation.TargetZoom;
}
else
{
if (m_Scroll != m_ScrollStart)
Editor->MakeDirty(SaveReasonFlags::Navigation);
m_IsActive = false;
}
// #TODO: Handle zoom while scrolling
// HandleZoom(control);
return m_IsActive;
}
bool ed::NavigateAction::HandleZoom(const Control& control)
{
IM_UNUSED(control);
const auto currentAction = Editor->GetCurrentAction();
const auto allowOffscreen = currentAction && currentAction->IsDragging();
auto& io = ImGui::GetIO();
if (!io.MouseWheel || (!allowOffscreen && !Editor->IsHoveredWithoutOverlapp()))// && !ImGui::IsAnyItemActive())
return false;
auto savedScroll = m_Scroll;
auto savedZoom = m_Zoom;
m_Animation.Finish();
auto mousePos = io.MousePos;
auto newZoom = GetNextZoom(io.MouseWheel);
auto oldView = GetView();
m_Zoom = newZoom;
auto newView = GetView();
auto screenPos = m_Canvas.FromLocal(mousePos, oldView);
auto canvasPos = m_Canvas.ToLocal(screenPos, newView);
auto offset = (canvasPos - mousePos) * m_Zoom;
auto targetScroll = m_Scroll - offset;
auto visibleRect = GetViewRect();
if (m_Scroll != savedScroll || m_Zoom != savedZoom || m_VisibleRect.Min != visibleRect.Min || m_VisibleRect.Max != visibleRect.Max)
{
m_Scroll = savedScroll;
m_Zoom = savedZoom;
m_VisibleRect = visibleRect;
Editor->MakeDirty(SaveReasonFlags::Navigation);
}
auto targetRect = m_Canvas.CalcViewRect(ImGuiEx::CanvasView(-targetScroll, newZoom));
NavigateTo(targetRect, c_MouseZoomDuration, NavigationReason::MouseZoom);
return true;
}
void ed::NavigateAction::ShowMetrics()
{
EditorAction::ShowMetrics();
ImGui::Text("%s:", GetName());
ImGui::Text(" Active: %s", m_IsActive ? "yes" : "no");
ImGui::Text(" Scroll: { x=%g y=%g }", m_Scroll.x, m_Scroll.y);
ImGui::Text(" Zoom: %g", m_Zoom);
ImGui::Text(" Visible Rect: { l=%g t=%g, r=%g b=%g w=%g h=%g }",
m_VisibleRect.Min.x, m_VisibleRect.Min.y,
m_VisibleRect.Max.x, m_VisibleRect.Max.y,
m_VisibleRect.Max.x - m_VisibleRect.Min.x,
m_VisibleRect.Max.y - m_VisibleRect.Min.y);
}
void ed::NavigateAction::NavigateTo(const ImRect& bounds, ZoomMode zoomMode, float duration, NavigationReason reason)
{
if (ImRect_IsEmpty(bounds))
return;
if (duration < 0.0f)
duration = GetStyle().ScrollDuration;
if (zoomMode == ZoomMode::None)
{
auto viewRect = m_Canvas.ViewRect();
auto viewRectCenter = viewRect.GetCenter();
auto targetCenter = bounds.GetCenter();
viewRect.Translate(targetCenter - viewRectCenter);
NavigateTo(viewRect, duration, reason);
}
else
{
// Grow rect by 5% to leave some reasonable margin
// from the edges of the canvas.
auto rect = bounds;
if (zoomMode == ZoomMode::WithMargin)
{
auto extend = ImMax(rect.GetWidth(), rect.GetHeight());
rect.Expand(extend * c_NavigationZoomMargin * 0.5f);
}
NavigateTo(rect, duration, reason);
}
}
void ed::NavigateAction::NavigateTo(const ImRect& target, float duration, NavigationReason reason)
{
m_Reason = reason;
m_Animation.NavigateTo(target, duration);
}
void ed::NavigateAction::StopNavigation()
{
m_Animation.Stop();
}
void ed::NavigateAction::FinishNavigation()
{
m_Animation.Finish();
}
bool ed::NavigateAction::MoveOverEdge(const ImVec2& canvasSize)
{
// Don't interrupt non-edge animations
if (m_Animation.IsPlaying())
return false;
auto& io = ImGui::GetIO();
const auto screenMousePos = io.MousePos;
const auto screenRect = ImRect(ImGui::GetCursorScreenPos(), ImGui::GetCursorScreenPos() + canvasSize);
// Mouse is over screen, do nothing
if (screenRect.Contains(screenMousePos))
return false;
// Several backend move mouse position to -FLT_MAX to indicate
// uninitialized/unknown state. To prevent all sorts
// of math problems, we just ignore such state.
if (screenMousePos.x <= -FLT_MAX || screenMousePos.y <= -FLT_MAX)
return false;
const auto minDistance = ImVec2(-c_MaxMoveOverEdgeDistance, -c_MaxMoveOverEdgeDistance);
const auto maxDistance = ImVec2( c_MaxMoveOverEdgeDistance, c_MaxMoveOverEdgeDistance);
const auto screenPointOnEdge = ImRect_ClosestPoint(screenRect, screenMousePos, true);
const auto offset = ImMin(ImMax(screenPointOnEdge - screenMousePos, minDistance), maxDistance);
const auto relativeOffset = -offset * io.DeltaTime * c_MaxMoveOverEdgeSpeed;
m_Scroll = m_Scroll + relativeOffset;
m_MoveScreenOffset = relativeOffset;
m_MovingOverEdge = true;
return true;
}
void ed::NavigateAction::StopMoveOverEdge()
{
if (m_MovingOverEdge)
{
Editor->MakeDirty(SaveReasonFlags::Navigation);
m_MoveScreenOffset = ImVec2(0, 0);
m_MovingOverEdge = false;
}
}
void ed::NavigateAction::SetWindow(ImVec2 position, ImVec2 size)
{
m_WindowScreenPos = position;
m_WindowScreenSize = size;
}
ImGuiEx::CanvasView ed::NavigateAction::GetView() const
{
return ImGuiEx::CanvasView(-m_Scroll, m_Zoom);
}
ImVec2 ed::NavigateAction::GetViewOrigin() const
{
return -m_Scroll;
}
float ed::NavigateAction::GetViewScale() const
{
return m_Zoom;
}
void ed::NavigateAction::SetViewRect(const ImRect& rect)
{
auto view = m_Canvas.CalcCenterView(rect);
m_Scroll = -view.Origin;
m_Zoom = view.Scale;
}
ImRect ed::NavigateAction::GetViewRect() const
{
return m_Canvas.CalcViewRect(GetView());
}
float ed::NavigateAction::GetNextZoom(float steps)
{
if (this->Editor->GetConfig().EnableSmoothZoom)
{
return MatchSmoothZoom(steps);
}
else
{
auto fixedSteps = (int)steps;
return MatchZoom(fixedSteps, m_ZoomLevels[fixedSteps < 0 ? 0 : m_ZoomLevelCount - 1]);
}
}
float ed::NavigateAction::MatchSmoothZoom(float steps)
{
const auto power = Editor->GetConfig().SmoothZoomPower;
const auto newZoom = m_Zoom * powf(power, steps);
if (newZoom < m_ZoomLevels[0])
return m_ZoomLevels[0];
else if (newZoom > m_ZoomLevels[m_ZoomLevelCount - 1])
return m_ZoomLevels[m_ZoomLevelCount - 1];
else
return newZoom;
}
float ed::NavigateAction::MatchZoom(int steps, float fallbackZoom)
{
auto currentZoomIndex = MatchZoomIndex(steps);
if (currentZoomIndex < 0)
return fallbackZoom;
auto currentZoom = m_ZoomLevels[currentZoomIndex];
if (fabsf(currentZoom - m_Zoom) > 0.001f)
return currentZoom;
auto newIndex = currentZoomIndex + steps;
if (newIndex >= 0 && newIndex < m_ZoomLevelCount)
return m_ZoomLevels[newIndex];
else
return fallbackZoom;
}
int ed::NavigateAction::MatchZoomIndex(int direction)
{
int bestIndex = -1;
float bestDistance = 0.0f;
for (int i = 0; i < m_ZoomLevelCount; ++i)
{
auto distance = fabsf(m_ZoomLevels[i] - m_Zoom);
if (distance < bestDistance || bestIndex < 0)
{
bestDistance = distance;
bestIndex = i;
}
}
if (bestDistance > 0.001f)
{
if (direction > 0)
{
++bestIndex;
if (bestIndex >= m_ZoomLevelCount)
bestIndex = m_ZoomLevelCount - 1;
}
else if (direction < 0)
{
--bestIndex;
if (bestIndex < 0)
bestIndex = 0;
}
}
return bestIndex;
}
//------------------------------------------------------------------------------
//
// Size Action
//
//------------------------------------------------------------------------------
ed::SizeAction::SizeAction(EditorContext* editor):
EditorAction(editor),
m_IsActive(false),
m_Clean(false),
m_SizedNode(nullptr),
m_Pivot(NodeRegion::None),
m_Cursor(ImGuiMouseCursor_Arrow)
{
}
ed::EditorAction::AcceptResult ed::SizeAction::Accept(const Control& control)
{
IM_ASSERT(!m_IsActive);
if (m_IsActive)
return False;
if (control.ActiveNode && IsGroup(control.ActiveNode) && ImGui::IsMouseDragging(Editor->GetConfig().DragButtonIndex, 1))
{
//const auto mousePos = to_point(ImGui::GetMousePos());
//const auto closestPoint = control.ActiveNode->Bounds.get_closest_point_hollow(mousePos, static_cast<int>(control.ActiveNode->Rounding));
auto pivot = GetRegion(control.ActiveNode);
if (pivot != NodeRegion::Header && pivot != NodeRegion::Center)
{
m_StartBounds = control.ActiveNode->m_Bounds;
m_StartGroupBounds = control.ActiveNode->m_GroupBounds;
m_LastSize = control.ActiveNode->m_Bounds.GetSize();
m_MinimumSize = ImVec2(0, 0);
m_LastDragOffset = ImVec2(0, 0);
m_Pivot = pivot;
m_Cursor = ChooseCursor(m_Pivot);
m_SizedNode = control.ActiveNode;
m_IsActive = true;
}
}
else if (control.HotNode && IsGroup(control.HotNode))
{
m_Cursor = ChooseCursor(GetRegion(control.HotNode));
return Possible;
}
return m_IsActive ? True : False;
}
bool ed::SizeAction::Process(const Control& control)
{
if (m_Clean)
{
m_Clean = false;
if (m_SizedNode->m_Bounds.Min != m_StartBounds.Min || m_SizedNode->m_GroupBounds.Min != m_StartGroupBounds.Min)
Editor->MakeDirty(SaveReasonFlags::Position | SaveReasonFlags::User, m_SizedNode);
if (m_SizedNode->m_Bounds.GetSize() != m_StartBounds.GetSize() || m_SizedNode->m_GroupBounds.GetSize() != m_StartGroupBounds.GetSize())
Editor->MakeDirty(SaveReasonFlags::Size | SaveReasonFlags::User, m_SizedNode);
m_SizedNode = nullptr;
}
if (!m_IsActive)
return false;
if (control.ActiveNode == m_SizedNode)
{
const auto dragOffset = (control.ActiveNode == m_SizedNode) ? ImGui::GetMouseDragDelta(0, 0.0f) : m_LastDragOffset;
m_LastDragOffset = dragOffset;
if (m_MinimumSize.x == 0.0f && m_LastSize.x != m_SizedNode->m_Bounds.GetWidth())
m_MinimumSize.x = m_SizedNode->m_Bounds.GetWidth();
if (m_MinimumSize.y == 0.0f && m_LastSize.y != m_SizedNode->m_Bounds.GetHeight())
m_MinimumSize.y = m_SizedNode->m_Bounds.GetHeight();
auto minimumSize = ImMax(m_MinimumSize, m_StartBounds.GetSize() - m_StartGroupBounds.GetSize());
auto newBounds = m_StartBounds;
if ((m_Pivot & NodeRegion::Top) == NodeRegion::Top)
newBounds.Min.y = ImMin(newBounds.Max.y - minimumSize.y, Editor->AlignPointToGrid(newBounds.Min.y + dragOffset.y));
if ((m_Pivot & NodeRegion::Bottom) == NodeRegion::Bottom)
newBounds.Max.y = ImMax(newBounds.Min.y + minimumSize.y, Editor->AlignPointToGrid(newBounds.Max.y + dragOffset.y));
if ((m_Pivot & NodeRegion::Left) == NodeRegion::Left)
newBounds.Min.x = ImMin(newBounds.Max.x - minimumSize.x, Editor->AlignPointToGrid(newBounds.Min.x + dragOffset.x));
if ((m_Pivot & NodeRegion::Right) == NodeRegion::Right)
newBounds.Max.x = ImMax(newBounds.Min.x + minimumSize.x, Editor->AlignPointToGrid(newBounds.Max.x + dragOffset.x));
newBounds.Floor();
m_LastSize = newBounds.GetSize();
m_SizedNode->m_Bounds = newBounds;
m_SizedNode->m_GroupBounds = newBounds;
m_SizedNode->m_GroupBounds.Min.x -= m_StartBounds.Min.x - m_StartGroupBounds.Min.x;
m_SizedNode->m_GroupBounds.Min.y -= m_StartBounds.Min.y - m_StartGroupBounds.Min.y;
m_SizedNode->m_GroupBounds.Max.x -= m_StartBounds.Max.x - m_StartGroupBounds.Max.x;
m_SizedNode->m_GroupBounds.Max.y -= m_StartBounds.Max.y - m_StartGroupBounds.Max.y;
}
else if (!control.ActiveNode)
{
m_Clean = true;
m_IsActive = false;
return true;
}
return m_IsActive;
}
void ed::SizeAction::ShowMetrics()
{
EditorAction::ShowMetrics();
auto getObjectName = [](Object* object)
{
if (!object) return "";
else if (object->AsNode()) return "Node";
else if (object->AsPin()) return "Pin";
else if (object->AsLink()) return "Link";
else return "";
};
ImGui::Text("%s:", GetName());
ImGui::Text(" Active: %s", m_IsActive ? "yes" : "no");
ImGui::Text(" Node: %s (%p)", getObjectName(m_SizedNode), m_SizedNode ? m_SizedNode->m_ID.AsPointer() : nullptr);
if (m_SizedNode && m_IsActive)
{
ImGui::Text(" Bounds: { x=%g y=%g w=%g h=%g }", m_SizedNode->m_Bounds.Min.x, m_SizedNode->m_Bounds.Min.y, m_SizedNode->m_Bounds.GetWidth(), m_SizedNode->m_Bounds.GetHeight());
ImGui::Text(" Group Bounds: { x=%g y=%g w=%g h=%g }", m_SizedNode->m_GroupBounds.Min.x, m_SizedNode->m_GroupBounds.Min.y, m_SizedNode->m_GroupBounds.GetWidth(), m_SizedNode->m_GroupBounds.GetHeight());
ImGui::Text(" Start Bounds: { x=%g y=%g w=%g h=%g }", m_StartBounds.Min.x, m_StartBounds.Min.y, m_StartBounds.GetWidth(), m_StartBounds.GetHeight());
ImGui::Text(" Start Group Bounds: { x=%g y=%g w=%g h=%g }", m_StartGroupBounds.Min.x, m_StartGroupBounds.Min.y, m_StartGroupBounds.GetWidth(), m_StartGroupBounds.GetHeight());
ImGui::Text(" Minimum Size: { w=%g h=%g }", m_MinimumSize.x, m_MinimumSize.y);
ImGui::Text(" Last Size: { w=%g h=%g }", m_LastSize.x, m_LastSize.y);
}
}
ed::NodeRegion ed::SizeAction::GetRegion(Node* node)
{
return node->GetRegion(ImGui::GetMousePos());
}
ImGuiMouseCursor ed::SizeAction::ChooseCursor(NodeRegion region)
{
switch (region)
{
default:
case NodeRegion::Center:
return ImGuiMouseCursor_Arrow;
case NodeRegion::Top:
case NodeRegion::Bottom:
return ImGuiMouseCursor_ResizeNS;
case NodeRegion::Left:
case NodeRegion::Right:
return ImGuiMouseCursor_ResizeEW;
case NodeRegion::TopLeft:
case NodeRegion::BottomRight:
return ImGuiMouseCursor_ResizeNWSE;
case NodeRegion::TopRight:
case NodeRegion::BottomLeft:
return ImGuiMouseCursor_ResizeNESW;
}
}
//------------------------------------------------------------------------------
//
// Drag Action
//
//------------------------------------------------------------------------------
ed::DragAction::DragAction(EditorContext* editor):
EditorAction(editor),
m_IsActive(false),
m_Clear(false),
m_DraggedObject(nullptr)
{
}
ed::EditorAction::AcceptResult ed::DragAction::Accept(const Control& control)
{
IM_ASSERT(!m_IsActive);
if (m_IsActive)
return False;
if (Editor->CanAcceptUserInput() && control.ActiveObject && ImGui::IsMouseDragging(Editor->GetConfig().DragButtonIndex, 1))
{
if (!control.ActiveObject->AcceptDrag())
return False;
m_DraggedObject = control.ActiveObject;
m_Objects.resize(0);
m_Objects.push_back(m_DraggedObject);
if (Editor->IsSelected(m_DraggedObject))
{
for (auto selectedObject : Editor->GetSelectedObjects())
if (auto selectedNode = selectedObject->AsNode())
if (selectedNode != m_DraggedObject && selectedNode->AcceptDrag())
m_Objects.push_back(selectedNode);
}
auto& io = ImGui::GetIO();
if (!io.KeyShift)
{
std::vector<Node*> groupedNodes;
for (auto object : m_Objects)
if (auto node = object->AsNode())
node->GetGroupedNodes(groupedNodes, true);
auto isAlreadyPicked = [this](Node* node)
{
return std::find(m_Objects.begin(), m_Objects.end(), node) != m_Objects.end();
};
for (auto candidate : groupedNodes)
if (!isAlreadyPicked(candidate) && candidate->AcceptDrag())
m_Objects.push_back(candidate);
}
m_IsActive = true;
}
else if (control.HotNode && IsGroup(control.HotNode) && control.HotNode->GetRegion(ImGui::GetMousePos()) == NodeRegion::Header)
{
return Possible;
}
return m_IsActive ? True : False;
}
bool ed::DragAction::Process(const Control& control)
{
if (m_Clear)
{
m_Clear = false;
for (auto object : m_Objects)
{
if (object->EndDrag())
Editor->MakeDirty(SaveReasonFlags::Position | SaveReasonFlags::User, object->AsNode());
}
m_Objects.resize(0);
m_DraggedObject = nullptr;
}
if (!m_IsActive)
return false;
if (control.ActiveObject == m_DraggedObject)
{
auto dragOffset = ImGui::GetMouseDragDelta(Editor->GetConfig().DragButtonIndex, 0.0f);
auto draggedOrigin = m_DraggedObject->DragStartLocation();
auto alignPivot = ImVec2(0, 0);
// TODO: Move this experimental alignment to closes pivot out of internals to node API
if (auto draggedNode = m_DraggedObject->AsNode())
{
float x = FLT_MAX;
float y = FLT_MAX;
auto testPivot = [this, &x, &y, &draggedOrigin, &dragOffset, &alignPivot](const ImVec2& pivot)
{
auto initial = draggedOrigin + dragOffset + pivot;
auto candidate = Editor->AlignPointToGrid(initial) - draggedOrigin - pivot;
if (ImFabs(candidate.x) < ImFabs(ImMin(x, FLT_MAX)))
{
x = candidate.x;
alignPivot.x = pivot.x;
}
if (ImFabs(candidate.y) < ImFabs(ImMin(y, FLT_MAX)))
{
y = candidate.y;
alignPivot.y = pivot.y;
}
};
for (auto pin = draggedNode->m_LastPin; pin; pin = pin->m_PreviousPin)
{
auto pivot = pin->m_Pivot.GetCenter() - draggedNode->m_Bounds.Min;
testPivot(pivot);
}
//testPivot(point(0, 0));
}
auto alignedOffset = Editor->AlignPointToGrid(draggedOrigin + dragOffset + alignPivot) - draggedOrigin - alignPivot;
if (!ImGui::GetIO().KeyAlt)
dragOffset = alignedOffset;
for (auto object : m_Objects)
object->UpdateDrag(dragOffset);
}
else if (!control.ActiveObject)
{
m_Clear = true;
m_IsActive = false;
return true;
}
return m_IsActive;
}
void ed::DragAction::ShowMetrics()
{
EditorAction::ShowMetrics();
auto getObjectName = [](Object* object)
{
if (!object) return "";
else if (object->AsNode()) return "Node";
else if (object->AsPin()) return "Pin";
else if (object->AsLink()) return "Link";
else return "";
};
ImGui::Text("%s:", GetName());
ImGui::Text(" Active: %s", m_IsActive ? "yes" : "no");
ImGui::Text(" Node: %s (%p)", getObjectName(m_DraggedObject), m_DraggedObject ? m_DraggedObject->ID().AsPointer() : nullptr);
}
//------------------------------------------------------------------------------
//
// Select Action
//
//------------------------------------------------------------------------------
ed::SelectAction::SelectAction(EditorContext* editor):
EditorAction(editor),
m_IsActive(false),
m_SelectGroups(false),
m_SelectLinkMode(false),
m_CommitSelection(false),
m_StartPoint(),
m_Animation(editor)
{
}
ed::EditorAction::AcceptResult ed::SelectAction::Accept(const Control& control)
{
IM_ASSERT(!m_IsActive);
if (m_IsActive)
return False;
auto& io = ImGui::GetIO();
m_SelectGroups = io.KeyShift;
m_SelectLinkMode = io.KeyAlt;
m_SelectedObjectsAtStart.clear();
if (Editor->CanAcceptUserInput() && control.BackgroundHot && ImGui::IsMouseDragging(Editor->GetConfig().SelectButtonIndex, 1))
{
m_IsActive = true;
m_StartPoint = ImGui_GetMouseClickPos(Editor->GetConfig().SelectButtonIndex);
m_EndPoint = m_StartPoint;
// Links and nodes cannot be selected together
if ((m_SelectLinkMode && Editor->IsAnyNodeSelected()) ||
(!m_SelectLinkMode && Editor->IsAnyLinkSelected()))
{
Editor->ClearSelection();
}
if (io.KeyCtrl)
m_SelectedObjectsAtStart = Editor->GetSelectedObjects();
}
else if (control.BackgroundClickButtonIndex == Editor->GetConfig().SelectButtonIndex)
{
Editor->ClearSelection();
}
else
{
Object* clickedObject = control.ClickedNode ? static_cast<Object*>(control.ClickedNode) : static_cast<Object*>(control.ClickedLink);
if (clickedObject)
{
// Links and nodes cannot be selected together
if ((clickedObject->AsLink() && Editor->IsAnyNodeSelected()) ||
(clickedObject->AsNode() && Editor->IsAnyLinkSelected()))
{
Editor->ClearSelection();
}
if (io.KeyCtrl)
Editor->ToggleObjectSelection(clickedObject);
else
Editor->SetSelectedObject(clickedObject);
}
}
if (m_IsActive)
m_Animation.Stop();
return m_IsActive ? True : False;
}
bool ed::SelectAction::Process(const Control& control)
{
IM_UNUSED(control);
if (m_CommitSelection)
{
Editor->ClearSelection();
for (auto object : m_CandidateObjects)
Editor->SelectObject(object);
m_CandidateObjects.clear();
m_CommitSelection = false;
}
if (!m_IsActive)
return false;
if (ImGui::IsMouseDragging(Editor->GetConfig().SelectButtonIndex, 0))
{
m_EndPoint = ImGui::GetMousePos();
auto topLeft = ImVec2(std::min(m_StartPoint.x, m_EndPoint.x), std::min(m_StartPoint.y, m_EndPoint.y));
auto bottomRight = ImVec2(ImMax(m_StartPoint.x, m_EndPoint.x), ImMax(m_StartPoint.y, m_EndPoint.y));
auto rect = ImRect(topLeft, bottomRight);
if (rect.GetWidth() <= 0)
rect.Max.x = rect.Min.x + 1;
if (rect.GetHeight() <= 0)
rect.Max.y = rect.Min.y + 1;
vector<Node*> nodes;
vector<Link*> links;
if (m_SelectLinkMode)
{
Editor->FindLinksInRect(rect, links);
m_CandidateObjects.assign(links.begin(), links.end());
}
else
{
Editor->FindNodesInRect(rect, nodes);
m_CandidateObjects.assign(nodes.begin(), nodes.end());
if (m_SelectGroups)
{
auto endIt = std::remove_if(m_CandidateObjects.begin(), m_CandidateObjects.end(), [](Object* object) { return !IsGroup(object->AsNode()); });
m_CandidateObjects.erase(endIt, m_CandidateObjects.end());
}
else
{
auto endIt = std::remove_if(m_CandidateObjects.begin(), m_CandidateObjects.end(), [](Object* object) { return IsGroup(object->AsNode()); });
m_CandidateObjects.erase(endIt, m_CandidateObjects.end());
}
}
m_CandidateObjects.insert(m_CandidateObjects.end(), m_SelectedObjectsAtStart.begin(), m_SelectedObjectsAtStart.end());
std::sort(m_CandidateObjects.begin(), m_CandidateObjects.end());
m_CandidateObjects.erase(std::unique(m_CandidateObjects.begin(), m_CandidateObjects.end()), m_CandidateObjects.end());
}
else
{
m_IsActive = false;
m_Animation.Play(c_SelectionFadeOutDuration);
m_CommitSelection = true;
return true;
}
return m_IsActive;
}
void ed::SelectAction::ShowMetrics()
{
EditorAction::ShowMetrics();
ImGui::Text("%s:", GetName());
ImGui::Text(" Active: %s", m_IsActive ? "yes" : "no");
}
void ed::SelectAction::Draw(ImDrawList* drawList)
{
if (!m_IsActive && !m_Animation.IsPlaying())
return;
const auto alpha = m_Animation.IsPlaying() ? ImEasing::EaseOutQuad(1.0f, -1.0f, m_Animation.GetProgress()) : 1.0f;
const auto fillColor = Editor->GetColor(m_SelectLinkMode ? StyleColor_LinkSelRect : StyleColor_NodeSelRect, alpha);
const auto outlineColor = Editor->GetColor(m_SelectLinkMode ? StyleColor_LinkSelRectBorder : StyleColor_NodeSelRectBorder, alpha);
drawList->ChannelsSetCurrent(c_BackgroundChannel_SelectionRect);
auto min = ImVec2(std::min(m_StartPoint.x, m_EndPoint.x), std::min(m_StartPoint.y, m_EndPoint.y));
auto max = ImVec2(ImMax(m_StartPoint.x, m_EndPoint.x), ImMax(m_StartPoint.y, m_EndPoint.y));
drawList->AddRectFilled(min, max, fillColor);
drawList->AddRect(min, max, outlineColor);
}
//------------------------------------------------------------------------------
//
// Context Menu Action
//
//------------------------------------------------------------------------------
ed::ContextMenuAction::ContextMenuAction(EditorContext* editor):
EditorAction(editor),
m_CandidateMenu(Menu::None),
m_CurrentMenu(Menu::None),
m_ContextId()
{
}
ed::EditorAction::AcceptResult ed::ContextMenuAction::Accept(const Control& control)
{
const auto isPressed = ImGui::IsMouseClicked(Editor->GetConfig().ContextMenuButtonIndex);
const auto isReleased = ImGui::IsMouseReleased(Editor->GetConfig().ContextMenuButtonIndex);
const auto isDragging = ImGui::IsMouseDragging(Editor->GetConfig().ContextMenuButtonIndex, 1);
if (isPressed || isReleased || isDragging)
{
Menu candidateMenu = ContextMenuAction::None;
ObjectId contextId;
if (auto hotObejct = control.HotObject)
{
if (hotObejct->AsNode())
candidateMenu = Node;
else if (hotObejct->AsPin())
candidateMenu = Pin;
else if (hotObejct->AsLink())
candidateMenu = Link;
if (candidateMenu != None)
contextId = hotObejct->ID();
}
else if (control.BackgroundHot)
candidateMenu = Background;
if (isPressed)
{
m_CandidateMenu = candidateMenu;
m_ContextId = contextId;
return Possible;
}
else if (isReleased && m_CandidateMenu == candidateMenu && m_ContextId == contextId)
{
m_CurrentMenu = m_CandidateMenu;
m_CandidateMenu = ContextMenuAction::None;
return True;
}
else
{
m_CandidateMenu = None;
m_CurrentMenu = None;
m_ContextId = ObjectId();
return False;
}
}
return False;
}
bool ed::ContextMenuAction::Process(const Control& control)
{
IM_UNUSED(control);
m_CandidateMenu = None;
m_CurrentMenu = None;
m_ContextId = ObjectId();
return false;
}
void ed::ContextMenuAction::Reject()
{
m_CandidateMenu = None;
m_CurrentMenu = None;
m_ContextId = ObjectId();
}
void ed::ContextMenuAction::ShowMetrics()
{
EditorAction::ShowMetrics();
auto getMenuName = [](Menu menu)
{
switch (menu)
{
default:
case None: return "None";
case Node: return "Node";
case Pin: return "Pin";
case Link: return "Link";
case Background: return "Background";
}
};
ImGui::Text("%s:", GetName());
ImGui::Text(" Menu: %s", getMenuName(m_CurrentMenu));
}
bool ed::ContextMenuAction::ShowNodeContextMenu(NodeId* nodeId)
{
if (m_CurrentMenu != Node)
return false;
*nodeId = m_ContextId.AsNodeId();
Editor->SetUserContext();
return true;
}
bool ed::ContextMenuAction::ShowPinContextMenu(PinId* pinId)
{
if (m_CurrentMenu != Pin)
return false;
*pinId = m_ContextId.AsPinId();
Editor->SetUserContext();
return true;
}
bool ed::ContextMenuAction::ShowLinkContextMenu(LinkId* linkId)
{
if (m_CurrentMenu != Link)
return false;
*linkId = m_ContextId.AsLinkId();
Editor->SetUserContext();
return true;
}
bool ed::ContextMenuAction::ShowBackgroundContextMenu()
{
if (m_CurrentMenu != Background)
return false;
Editor->SetUserContext();
return true;
}
//------------------------------------------------------------------------------
//
// Cut/Copy/Paste Action
//
//------------------------------------------------------------------------------
ed::ShortcutAction::ShortcutAction(EditorContext* editor):
EditorAction(editor),
m_IsActive(false),
m_InAction(false),
m_CurrentAction(Action::None),
m_Context()
{
}
ed::EditorAction::AcceptResult ed::ShortcutAction::Accept(const Control& control)
{
if (!Editor->IsFocused() || !Editor->AreShortcutsEnabled())
return False;
Action candidateAction = None;
auto& io = ImGui::GetIO();
if (io.KeyCtrl && !io.KeyShift && !io.KeyAlt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_X)))
candidateAction = Cut;
if (io.KeyCtrl && !io.KeyShift && !io.KeyAlt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_C)))
candidateAction = Copy;
if (io.KeyCtrl && !io.KeyShift && !io.KeyAlt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_V)))
candidateAction = Paste;
if (io.KeyCtrl && !io.KeyShift && !io.KeyAlt && ImGui::IsKeyPressed(GetKeyIndexForD()))
candidateAction = Duplicate;
if (!io.KeyCtrl && !io.KeyShift && !io.KeyAlt && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Space)))
candidateAction = CreateNode;
if (candidateAction != None)
{
if (candidateAction != Paste && candidateAction != CreateNode)
{
auto& selection = Editor->GetSelectedObjects();
if (!selection.empty())
{
// #TODO: Find a way to simplify logic.
m_Context.assign(selection.begin(), selection.end());
// Expand groups
vector<Node*> extra;
for (auto object : m_Context)
{
auto node = object->AsNode();
if (IsGroup(node))
node->GetGroupedNodes(extra, true);
}
// Apply groups and remove duplicates
if (!extra.empty())
{
m_Context.insert(m_Context.end(), extra.begin(), extra.end());
std::sort(m_Context.begin(), m_Context.end());
m_Context.erase(std::unique(m_Context.begin(), m_Context.end()), m_Context.end());
}
}
else if (control.HotObject && control.HotObject->IsSelectable() && !IsGroup(control.HotObject->AsNode()))
{
m_Context.push_back(control.HotObject);
}
if (m_Context.empty())
return False;
// Does copying only links make sense?
//const auto hasOnlyLinks = std::all_of(Context.begin(), Context.end(), [](Object* object) { return object->AsLink() != nullptr; });
//if (hasOnlyLinks)
// return False;
// If no links are selected, pick all links between nodes within context
const auto hasAnyLinks = std::any_of(m_Context.begin(), m_Context.end(), [](Object* object) { return object->AsLink() != nullptr; });
if (!hasAnyLinks && m_Context.size() > 1) // one node cannot make connection to anything
{
// Collect nodes in sorted vector viable for binary search
std::vector<ObjectWrapper<Node>> nodes;
nodes.reserve(m_Context.size());
std::for_each(m_Context.begin(), m_Context.end(), [&nodes](Object* object) { if (auto node = object->AsNode()) nodes.push_back({node->m_ID, node}); });
std::sort(nodes.begin(), nodes.end());
auto isNodeInContext = [&nodes](NodeId nodeId)
{
return std::binary_search(nodes.begin(), nodes.end(), ObjectWrapper<Node>{nodeId, nullptr});
};
// Collect links connected to nodes and drop those reaching out of context
std::vector<Link*> links;
for (auto node : nodes)
Editor->FindLinksForNode(node.m_ID, links, true);
// Remove duplicates
std::sort(links.begin(), links.end());
links.erase(std::unique(links.begin(), links.end()), links.end());
// Drop out of context links
links.erase(std::remove_if(links.begin(), links.end(), [&isNodeInContext](Link* link)
{
return !isNodeInContext(link->m_StartPin->m_Node->m_ID) || !isNodeInContext(link->m_EndPin->m_Node->m_ID);
}), links.end());
// Append links and remove duplicates
m_Context.insert(m_Context.end(), links.begin(), links.end());
}
}
else
m_Context.resize(0);
m_IsActive = true;
m_CurrentAction = candidateAction;
return True;
}
return False;
}
bool ed::ShortcutAction::Process(const Control& control)
{
IM_UNUSED(control);
m_IsActive = false;
m_CurrentAction = None;
m_Context.resize(0);
return false;
}
void ed::ShortcutAction::Reject()
{
m_IsActive = false;
m_CurrentAction = None;
m_Context.resize(0);
}
void ed::ShortcutAction::ShowMetrics()
{
EditorAction::ShowMetrics();
auto getActionName = [](Action action)
{
switch (action)
{
default:
case None: return "None";
case Cut: return "Cut";
case Copy: return "Copy";
case Paste: return "Paste";
case Duplicate: return "Duplicate";
case CreateNode: return "CreateNode";
}
};
ImGui::Text("%s:", GetName());
ImGui::Text(" Action: %s", getActionName(m_CurrentAction));
}
bool ed::ShortcutAction::Begin()
{
if (m_IsActive)
m_InAction = true;
return m_IsActive;
}
void ed::ShortcutAction::End()
{
if (m_IsActive)
m_InAction = false;
}
bool ed::ShortcutAction::AcceptCut()
{
IM_ASSERT(m_InAction);
return m_CurrentAction == Cut;
}
bool ed::ShortcutAction::AcceptCopy()
{
IM_ASSERT(m_InAction);
return m_CurrentAction == Copy;
}
bool ed::ShortcutAction::AcceptPaste()
{
IM_ASSERT(m_InAction);
return m_CurrentAction == Paste;
}
bool ed::ShortcutAction::AcceptDuplicate()
{
IM_ASSERT(m_InAction);
return m_CurrentAction == Duplicate;
}
bool ed::ShortcutAction::AcceptCreateNode()
{
IM_ASSERT(m_InAction);
return m_CurrentAction == CreateNode;
}
//------------------------------------------------------------------------------
//
// Create Item Action
//
//------------------------------------------------------------------------------
ed::CreateItemAction::CreateItemAction(EditorContext* editor):
EditorAction(editor),
m_InActive(false),
m_NextStage(None),
m_CurrentStage(None),
m_ItemType(NoItem),
m_UserAction(Unknown),
m_LinkColor(IM_COL32_WHITE),
m_LinkThickness(1.0f),
m_LinkStart(nullptr),
m_LinkEnd(nullptr),
m_IsActive(false),
m_DraggedPin(nullptr),
m_IsInGlobalSpace(false)
{
}
ed::EditorAction::AcceptResult ed::CreateItemAction::Accept(const Control& control)
{
IM_ASSERT(!m_IsActive);
if (m_IsActive)
return EditorAction::False;
if (control.ActivePin && ImGui::IsMouseDragging(Editor->GetConfig().DragButtonIndex, 1))
{
m_DraggedPin = control.ActivePin;
DragStart(m_DraggedPin);
Editor->ClearSelection();
}
else if (control.HotPin)
{
return EditorAction::Possible;
}
else
return EditorAction::False;
m_IsActive = true;
return EditorAction::True;
}
bool ed::CreateItemAction::Process(const Control& control)
{
IM_ASSERT(m_IsActive);
if (!m_IsActive)
return false;
if (m_DraggedPin && control.ActivePin == m_DraggedPin && (m_CurrentStage == Possible))
{
const auto draggingFromSource = (m_DraggedPin->m_Kind == PinKind::Output);
ed::Pin cursorPin(Editor, 0, draggingFromSource ? PinKind::Input : PinKind::Output);
cursorPin.m_Pivot = ImRect(ImGui::GetMousePos(), ImGui::GetMousePos());
cursorPin.m_Dir = -m_DraggedPin->m_Dir;
cursorPin.m_Strength = m_DraggedPin->m_Strength;
ed::Link candidate(Editor, 0);
candidate.m_Color = m_LinkColor;
candidate.m_StartPin = draggingFromSource ? m_DraggedPin : &cursorPin;
candidate.m_EndPin = draggingFromSource ? &cursorPin : m_DraggedPin;
ed::Pin*& freePin = draggingFromSource ? candidate.m_EndPin : candidate.m_StartPin;
if (control.HotPin)
{
DropPin(control.HotPin);
if (m_UserAction == UserAccept)
freePin = control.HotPin;
}
else if (control.BackgroundHot)
DropNode();
else
DropNothing();
auto drawList = Editor->GetDrawList();
drawList->ChannelsSetCurrent(c_LinkChannel_NewLink);
candidate.UpdateEndpoints();
candidate.Draw(drawList, m_LinkColor, m_LinkThickness);
}
else if (m_CurrentStage == Possible || !control.ActivePin)
{
if (!Editor->CanAcceptUserInput())
{
m_DraggedPin = nullptr;
DropNothing();
}
DragEnd();
m_IsActive = false;
}
return m_IsActive;
}
void ed::CreateItemAction::ShowMetrics()
{
EditorAction::ShowMetrics();
auto getStageName = [](Stage stage)
{
switch (stage)
{
case None: return "None";
case Possible: return "Possible";
case Create: return "Create";
default: return "<unknown>";
}
};
auto getActionName = [](Action action)
{
switch (action)
{
default:
case Unknown: return "Unknown";
case UserReject: return "Reject";
case UserAccept: return "Accept";
}
};
auto getItemName = [](Type item)
{
switch (item)
{
default:
case NoItem: return "None";
case Node: return "Node";
case Link: return "Link";
}
};
ImGui::Text("%s:", GetName());
ImGui::Text(" Stage: %s", getStageName(m_CurrentStage));
ImGui::Text(" User Action: %s", getActionName(m_UserAction));
ImGui::Text(" Item Type: %s", getItemName(m_ItemType));
}
void ed::CreateItemAction::SetStyle(ImU32 color, float thickness)
{
m_LinkColor = color;
m_LinkThickness = thickness;
}
bool ed::CreateItemAction::Begin()
{
IM_ASSERT(false == m_InActive);
m_InActive = true;
m_CurrentStage = m_NextStage;
m_UserAction = Unknown;
m_LinkColor = IM_COL32_WHITE;
m_LinkThickness = 1.0f;
if (m_CurrentStage == None)
return false;
m_LastChannel = Editor->GetDrawList()->_Splitter._Current;
return true;
}
void ed::CreateItemAction::End()
{
IM_ASSERT(m_InActive);
if (m_IsInGlobalSpace)
{
ImGui::PopClipRect();
Editor->Resume(SuspendFlags::KeepSplitter);
auto currentChannel = Editor->GetDrawList()->_Splitter._Current;
if (currentChannel != m_LastChannel)
Editor->GetDrawList()->ChannelsSetCurrent(m_LastChannel);
m_IsInGlobalSpace = false;
}
m_InActive = false;
}
void ed::CreateItemAction::DragStart(Pin* startPin)
{
IM_ASSERT(!m_InActive);
m_NextStage = Possible;
m_LinkStart = startPin;
m_LinkEnd = nullptr;
}
void ed::CreateItemAction::DragEnd()
{
IM_ASSERT(!m_InActive);
if (m_CurrentStage == Possible && m_UserAction == UserAccept)
{
m_NextStage = Create;
}
else
{
m_NextStage = None;
m_ItemType = NoItem;
m_LinkStart = nullptr;
m_LinkEnd = nullptr;
}
}
void ed::CreateItemAction::DropPin(Pin* endPin)
{
IM_ASSERT(!m_InActive);
m_ItemType = Link;
m_LinkEnd = endPin;
}
void ed::CreateItemAction::DropNode()
{
IM_ASSERT(!m_InActive);
m_ItemType = Node;
m_LinkEnd = nullptr;
}
void ed::CreateItemAction::DropNothing()
{
IM_ASSERT(!m_InActive);
m_ItemType = NoItem;
m_LinkEnd = nullptr;
}
ed::CreateItemAction::Result ed::CreateItemAction::RejectItem()
{
IM_ASSERT(m_InActive);
if (!m_InActive || m_CurrentStage == None || m_ItemType == NoItem)
return Indeterminate;
m_UserAction = UserReject;
return True;
}
ed::CreateItemAction::Result ed::CreateItemAction::AcceptItem()
{
IM_ASSERT(m_InActive);
if (!m_InActive || m_CurrentStage == None || m_ItemType == NoItem)
return Indeterminate;
m_UserAction = UserAccept;
if (m_CurrentStage == Create)
{
m_NextStage = None;
m_ItemType = NoItem;
m_LinkStart = nullptr;
m_LinkEnd = nullptr;
return True;
}
else
return False;
}
ed::CreateItemAction::Result ed::CreateItemAction::QueryLink(PinId* startId, PinId* endId)
{
IM_ASSERT(m_InActive);
if (!m_InActive || m_CurrentStage == None || m_ItemType != Link)
return Indeterminate;
auto linkStartId = m_LinkStart->m_ID;
auto linkEndId = m_LinkEnd->m_ID;
*startId = linkStartId;
*endId = linkEndId;
Editor->SetUserContext(true);
if (!m_IsInGlobalSpace)
{
Editor->Suspend(SuspendFlags::KeepSplitter);
auto rect = Editor->GetRect();
ImGui::PushClipRect(rect.Min + ImVec2(1, 1), rect.Max - ImVec2(1, 1), false);
m_IsInGlobalSpace = true;
}
return True;
}
ed::CreateItemAction::Result ed::CreateItemAction::QueryNode(PinId* pinId)
{
IM_ASSERT(m_InActive);
if (!m_InActive || m_CurrentStage == None || m_ItemType != Node)
return Indeterminate;
*pinId = m_LinkStart ? m_LinkStart->m_ID : 0;
Editor->SetUserContext(true);
if (!m_IsInGlobalSpace)
{
Editor->Suspend(SuspendFlags::KeepSplitter);
auto rect = Editor->GetRect();
ImGui::PushClipRect(rect.Min + ImVec2(1, 1), rect.Max - ImVec2(1, 1), false);
m_IsInGlobalSpace = true;
}
return True;
}
//------------------------------------------------------------------------------
//
// Delete Items Action
//
//------------------------------------------------------------------------------
ed::DeleteItemsAction::DeleteItemsAction(EditorContext* editor):
EditorAction(editor),
m_IsActive(false),
m_InInteraction(false),
m_CurrentItemType(Unknown),
m_UserAction(Undetermined)
{
}
void ed::DeleteItemsAction::DeleteDeadLinks(NodeId nodeId)
{
vector<ed::Link*> links;
Editor->FindLinksForNode(nodeId, links, true);
for (auto link : links)
{
link->m_DeleteOnNewFrame = true;
auto it = std::find(m_CandidateObjects.begin(), m_CandidateObjects.end(), link);
if (it != m_CandidateObjects.end())
continue;
m_CandidateObjects.push_back(link);
}
}
void ed::DeleteItemsAction::DeleteDeadPins(NodeId nodeId)
{
auto node = Editor->FindNode(nodeId);
if (!node)
return;
for (auto pin = node->m_LastPin; pin; pin = pin->m_PreviousPin)
pin->m_DeleteOnNewFrame = true;
}
ed::EditorAction::AcceptResult ed::DeleteItemsAction::Accept(const Control& control)
{
IM_ASSERT(!m_IsActive);
if (m_IsActive)
return False;
auto& io = ImGui::GetIO();
if (Editor->CanAcceptUserInput() && ImGui::IsKeyPressed(ImGui::GetKeyIndex(ImGuiKey_Delete)) && Editor->AreShortcutsEnabled())
{
auto& selection = Editor->GetSelectedObjects();
if (!selection.empty())
{
m_CandidateObjects = selection;
m_IsActive = true;
return True;
}
}
else if (control.ClickedLink && io.KeyAlt)
{
m_CandidateObjects.clear();
m_CandidateObjects.push_back(control.ClickedLink);
m_IsActive = true;
return True;
}
else if (!m_ManuallyDeletedObjects.empty())
{
m_CandidateObjects = m_ManuallyDeletedObjects;
m_ManuallyDeletedObjects.clear();
m_IsActive = true;
return True;
}
return m_IsActive ? True : False;
}
bool ed::DeleteItemsAction::Process(const Control& control)
{
IM_UNUSED(control);
if (!m_IsActive)
return false;
m_IsActive = false;
return true;
}
void ed::DeleteItemsAction::ShowMetrics()
{
EditorAction::ShowMetrics();
//auto getObjectName = [](Object* object)
//{
// if (!object) return "";
// else if (object->AsNode()) return "Node";
// else if (object->AsPin()) return "Pin";
// else if (object->AsLink()) return "Link";
// else return "";
//};
ImGui::Text("%s:", GetName());
ImGui::Text(" Active: %s", m_IsActive ? "yes" : "no");
//ImGui::Text(" Node: %s (%d)", getObjectName(DeleteItemsgedNode), DeleteItemsgedNode ? DeleteItemsgedNode->ID : 0);
}
bool ed::DeleteItemsAction::Add(Object* object)
{
if (Editor->GetCurrentAction() != nullptr)
return false;
m_ManuallyDeletedObjects.push_back(object);
return true;
}
bool ed::DeleteItemsAction::Begin()
{
if (!m_IsActive)
return false;
IM_ASSERT(!m_InInteraction);
m_InInteraction = true;
m_CurrentItemType = Unknown;
m_UserAction = Undetermined;
return m_IsActive;
}
void ed::DeleteItemsAction::End()
{
if (!m_IsActive)
return;
IM_ASSERT(m_InInteraction);
m_InInteraction = false;
}
bool ed::DeleteItemsAction::QueryLink(LinkId* linkId, PinId* startId, PinId* endId)
{
ObjectId objectId;
if (!QueryItem(&objectId, Link))
return false;
if (auto id = objectId.AsLinkId())
*linkId = id;
else
return false;
if (startId || endId)
{
auto link = Editor->FindLink(*linkId);
if (startId)
*startId = link->m_StartPin->m_ID;
if (endId)
*endId = link->m_EndPin->m_ID;
}
return true;
}
bool ed::DeleteItemsAction::QueryNode(NodeId* nodeId)
{
ObjectId objectId;
if (!QueryItem(&objectId, Node))
return false;
if (auto id = objectId.AsNodeId())
*nodeId = id;
else
return false;
return true;
}
bool ed::DeleteItemsAction::QueryItem(ObjectId* itemId, IteratorType itemType)
{
if (!m_InInteraction)
return false;
if (m_CurrentItemType != itemType)
{
m_CurrentItemType = itemType;
m_CandidateItemIndex = 0;
}
else if (m_UserAction == Undetermined)
{
RejectItem();
}
m_UserAction = Undetermined;
auto itemCount = (int)m_CandidateObjects.size();
while (m_CandidateItemIndex < itemCount)
{
auto item = m_CandidateObjects[m_CandidateItemIndex];
if (itemType == Node)
{
if (auto node = item->AsNode())
{
*itemId = node->m_ID;
return true;
}
}
else if (itemType == Link)
{
if (auto link = item->AsLink())
{
*itemId = link->m_ID;
return true;
}
}
++m_CandidateItemIndex;
}
if (m_CandidateItemIndex == itemCount)
m_CurrentItemType = Unknown;
return false;
}
bool ed::DeleteItemsAction::AcceptItem(bool deleteDependencies)
{
if (!m_InInteraction)
return false;
m_UserAction = Accepted;
RemoveItem(deleteDependencies);
return true;
}
void ed::DeleteItemsAction::RejectItem()
{
if (!m_InInteraction)
return;
m_UserAction = Rejected;
DropCurrentItem();
}
void ed::DeleteItemsAction::RemoveItem(bool deleteDependencies)
{
auto item = DropCurrentItem();
Editor->DeselectObject(item);
Editor->RemoveSettings(item);
item->m_DeleteOnNewFrame = true;
if (deleteDependencies && m_CurrentItemType == Node)
{
auto node = item->ID().AsNodeId();
DeleteDeadLinks(node);
DeleteDeadPins(node);
}
if (m_CurrentItemType == Link)
Editor->NotifyLinkDeleted(item->AsLink());
}
ed::Object* ed::DeleteItemsAction::DropCurrentItem()
{
auto item = m_CandidateObjects[m_CandidateItemIndex];
m_CandidateObjects.erase(m_CandidateObjects.begin() + m_CandidateItemIndex);
return item;
}
//------------------------------------------------------------------------------
//
// Node Builder
//
//------------------------------------------------------------------------------
ed::NodeBuilder::NodeBuilder(EditorContext* editor):
Editor(editor),
m_CurrentNode(nullptr),
m_CurrentPin(nullptr)
{
}
ed::NodeBuilder::~NodeBuilder()
{
m_Splitter.ClearFreeMemory();
m_PinSplitter.ClearFreeMemory();
}
void ed::NodeBuilder::Begin(NodeId nodeId)
{
IM_ASSERT(nullptr == m_CurrentNode);
m_CurrentNode = Editor->GetNode(nodeId);
Editor->UpdateNodeState(m_CurrentNode);
if (m_CurrentNode->m_CenterOnScreen)
{
auto bounds = Editor->GetViewRect();
auto offset = bounds.GetCenter() - m_CurrentNode->m_Bounds.GetCenter();
if (ImLengthSqr(offset) > 0)
{
if (::IsGroup(m_CurrentNode))
{
std::vector<Node*> groupedNodes;
m_CurrentNode->GetGroupedNodes(groupedNodes);
groupedNodes.push_back(m_CurrentNode);
for (auto node : groupedNodes)
{
node->m_Bounds.Translate(ImFloor(offset));
node->m_GroupBounds.Translate(ImFloor(offset));
Editor->MakeDirty(SaveReasonFlags::Position | SaveReasonFlags::User, node);
}
}
else
{
m_CurrentNode->m_Bounds.Translate(ImFloor(offset));
m_CurrentNode->m_GroupBounds.Translate(ImFloor(offset));
Editor->MakeDirty(SaveReasonFlags::Position | SaveReasonFlags::User, m_CurrentNode);
}
}
m_CurrentNode->m_CenterOnScreen = false;
}
// Position node on screen
ImGui::SetCursorScreenPos(m_CurrentNode->m_Bounds.Min);
auto& editorStyle = Editor->GetStyle();
const auto alpha = ImGui::GetStyle().Alpha;
m_CurrentNode->m_IsLive = true;
m_CurrentNode->m_LastPin = nullptr;
m_CurrentNode->m_Color = Editor->GetColor(StyleColor_NodeBg, alpha);
m_CurrentNode->m_BorderColor = Editor->GetColor(StyleColor_NodeBorder, alpha);
m_CurrentNode->m_BorderWidth = editorStyle.NodeBorderWidth;
m_CurrentNode->m_Rounding = editorStyle.NodeRounding;
m_CurrentNode->m_GroupColor = Editor->GetColor(StyleColor_GroupBg, alpha);
m_CurrentNode->m_GroupBorderColor = Editor->GetColor(StyleColor_GroupBorder, alpha);
m_CurrentNode->m_GroupBorderWidth = editorStyle.GroupBorderWidth;
m_CurrentNode->m_GroupRounding = editorStyle.GroupRounding;
m_CurrentNode->m_HighlightConnectedLinks = editorStyle.HighlightConnectedLinks != 0.0f;
m_IsGroup = false;
// Grow channel list and select user channel
if (auto drawList = Editor->GetDrawList())
{
m_CurrentNode->m_Channel = drawList->_Splitter._Count;
ImDrawList_ChannelsGrow(drawList, drawList->_Splitter._Count + c_ChannelsPerNode);
drawList->ChannelsSetCurrent(m_CurrentNode->m_Channel + c_NodeContentChannel);
m_Splitter.Clear();
ImDrawList_SwapSplitter(drawList, m_Splitter);
}
// Begin outer group
ImGui::BeginGroup();
// Apply frame padding. Begin inner group if necessary.
if (editorStyle.NodePadding.x != 0 || editorStyle.NodePadding.y != 0 || editorStyle.NodePadding.z != 0 || editorStyle.NodePadding.w != 0)
{
ImGui::SetCursorPos(ImGui::GetCursorPos() + ImVec2(editorStyle.NodePadding.x, editorStyle.NodePadding.y));
ImGui::BeginGroup();
}
}
void ed::NodeBuilder::End()
{
IM_ASSERT(nullptr != m_CurrentNode);
if (auto drawList = Editor->GetDrawList())
{
IM_ASSERT(drawList->_Splitter._Count == 1); // Did you forgot to call drawList->ChannelsMerge()?
ImDrawList_SwapSplitter(drawList, m_Splitter);
}
// Apply frame padding. This must be done in this convoluted way if outer group
// size must contain inner group padding.
auto& editorStyle = Editor->GetStyle();
if (editorStyle.NodePadding.x != 0 || editorStyle.NodePadding.y != 0 || editorStyle.NodePadding.z != 0 || editorStyle.NodePadding.w != 0)
{
ImGui::EndGroup();
ImGui::SameLine(0, editorStyle.NodePadding.z);
ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(0.0f, 0.0f));
ImGui::Dummy(ImVec2(0, 0)); // bump cursor at the end of the line and move to next one
ImGui::Dummy(ImVec2(0, editorStyle.NodePadding.w)); // apply padding
ImGui::PopStyleVar();
}
// End outer group.
ImGui::EndGroup();
m_NodeRect = ImGui_GetItemRect();
m_NodeRect.Floor();
if (m_CurrentNode->m_Bounds.GetSize() != m_NodeRect.GetSize())
{
m_CurrentNode->m_Bounds.Max = m_CurrentNode->m_Bounds.Min + m_NodeRect.GetSize();
Editor->MakeDirty(SaveReasonFlags::Size, m_CurrentNode);
}
if (m_IsGroup)
{
// Groups cannot have pins. Discard them.
for (auto pin = m_CurrentNode->m_LastPin; pin; pin = pin->m_PreviousPin)
pin->Reset();
m_CurrentNode->m_Type = NodeType::Group;
m_CurrentNode->m_GroupBounds = m_GroupBounds;
m_CurrentNode->m_LastPin = nullptr;
}
else
m_CurrentNode->m_Type = NodeType::Node;
m_CurrentNode = nullptr;
}
void ed::NodeBuilder::BeginPin(PinId pinId, PinKind kind)
{
IM_ASSERT(nullptr != m_CurrentNode);
IM_ASSERT(nullptr == m_CurrentPin);
IM_ASSERT(false == m_IsGroup);
auto& editorStyle = Editor->GetStyle();
m_CurrentPin = Editor->GetPin(pinId, kind);
m_CurrentPin->m_Node = m_CurrentNode;
m_CurrentPin->m_IsLive = true;
m_CurrentPin->m_Color = Editor->GetColor(StyleColor_PinRect);
m_CurrentPin->m_BorderColor = Editor->GetColor(StyleColor_PinRectBorder);
m_CurrentPin->m_BorderWidth = editorStyle.PinBorderWidth;
m_CurrentPin->m_Rounding = editorStyle.PinRounding;
m_CurrentPin->m_Corners = static_cast<int>(editorStyle.PinCorners);
m_CurrentPin->m_Radius = editorStyle.PinRadius;
m_CurrentPin->m_ArrowSize = editorStyle.PinArrowSize;
m_CurrentPin->m_ArrowWidth = editorStyle.PinArrowWidth;
m_CurrentPin->m_Dir = kind == PinKind::Output ? editorStyle.SourceDirection : editorStyle.TargetDirection;
m_CurrentPin->m_Strength = editorStyle.LinkStrength;
m_CurrentPin->m_SnapLinkToDir = editorStyle.SnapLinkToPinDir != 0.0f;
m_CurrentPin->m_PreviousPin = m_CurrentNode->m_LastPin;
m_CurrentNode->m_LastPin = m_CurrentPin;
m_PivotAlignment = editorStyle.PivotAlignment;
m_PivotSize = editorStyle.PivotSize;
m_PivotScale = editorStyle.PivotScale;
m_ResolvePinRect = true;
m_ResolvePivot = true;
if (auto drawList = Editor->GetDrawList())
{
m_PinSplitter.Clear();
ImDrawList_SwapSplitter(drawList, m_PinSplitter);
}
ImGui::BeginGroup();
}
void ed::NodeBuilder::EndPin()
{
IM_ASSERT(nullptr != m_CurrentPin);
if (auto drawList = Editor->GetDrawList())
{
IM_ASSERT(drawList->_Splitter._Count == 1); // Did you forgot to call drawList->ChannelsMerge()?
ImDrawList_SwapSplitter(drawList, m_PinSplitter);
}
ImGui::EndGroup();
if (m_ResolvePinRect)
m_CurrentPin->m_Bounds = ImGui_GetItemRect();
if (m_ResolvePivot)
{
auto& pinRect = m_CurrentPin->m_Bounds;
if (m_PivotSize.x < 0)
m_PivotSize.x = pinRect.GetWidth();
if (m_PivotSize.y < 0)
m_PivotSize.y = pinRect.GetHeight();
m_CurrentPin->m_Pivot.Min = pinRect.Min + ImMul(pinRect.GetSize(), m_PivotAlignment);
m_CurrentPin->m_Pivot.Max = m_CurrentPin->m_Pivot.Min + ImMul(m_PivotSize, m_PivotScale);
}
// #debug: Draw pin bounds
//Editor->GetDrawList()->AddRect(m_CurrentPin->m_Bounds.Min, m_CurrentPin->m_Bounds.Max, IM_COL32(255, 255, 0, 255));
// #debug: Draw pin pivot rectangle
//Editor->GetDrawList()->AddRect(m_CurrentPin->m_Pivot.Min, m_CurrentPin->m_Pivot.Max, IM_COL32(255, 0, 255, 255));
m_CurrentPin = nullptr;
}
void ed::NodeBuilder::PinRect(const ImVec2& a, const ImVec2& b)
{
IM_ASSERT(nullptr != m_CurrentPin);
m_CurrentPin->m_Bounds = ImRect(a, b);
m_CurrentPin->m_Bounds.Floor();
m_ResolvePinRect = false;
}
void ed::NodeBuilder::PinPivotRect(const ImVec2& a, const ImVec2& b)
{
IM_ASSERT(nullptr != m_CurrentPin);
m_CurrentPin->m_Pivot = ImRect(a, b);
m_ResolvePivot = false;
}
void ed::NodeBuilder::PinPivotSize(const ImVec2& size)
{
IM_ASSERT(nullptr != m_CurrentPin);
m_PivotSize = size;
m_ResolvePivot = true;
}
void ed::NodeBuilder::PinPivotScale(const ImVec2& scale)
{
IM_ASSERT(nullptr != m_CurrentPin);
m_PivotScale = scale;
m_ResolvePivot = true;
}
void ed::NodeBuilder::PinPivotAlignment(const ImVec2& alignment)
{
IM_ASSERT(nullptr != m_CurrentPin);
m_PivotAlignment = alignment;
m_ResolvePivot = true;
}
void ed::NodeBuilder::Group(const ImVec2& size)
{
IM_ASSERT(nullptr != m_CurrentNode);
IM_ASSERT(nullptr == m_CurrentPin);
IM_ASSERT(false == m_IsGroup);
m_IsGroup = true;
if (IsGroup(m_CurrentNode))
ImGui::Dummy(m_CurrentNode->m_GroupBounds.GetSize());
else
ImGui::Dummy(size);
m_GroupBounds = ImGui_GetItemRect();
m_GroupBounds.Floor();
}
ImDrawList* ed::NodeBuilder::GetUserBackgroundDrawList() const
{
return GetUserBackgroundDrawList(m_CurrentNode);
}
ImDrawList* ed::NodeBuilder::GetUserBackgroundDrawList(Node* node) const
{
if (node && node->m_IsLive)
{
auto drawList = Editor->GetDrawList();
drawList->ChannelsSetCurrent(node->m_Channel + c_NodeUserBackgroundChannel);
return drawList;
}
else
return nullptr;
}
//------------------------------------------------------------------------------
//
// Node Builder
//
//------------------------------------------------------------------------------
ed::HintBuilder::HintBuilder(EditorContext* editor):
Editor(editor),
m_IsActive(false),
m_CurrentNode(nullptr)
{
}
bool ed::HintBuilder::Begin(NodeId nodeId)
{
IM_ASSERT(nullptr == m_CurrentNode);
auto& view = Editor->GetView();
auto& rect = Editor->GetRect();
const float c_min_zoom = 0.75f;
const float c_max_zoom = 0.50f;
if (view.Scale > 0.75f)
return false;
auto node = Editor->FindNode(nodeId);
if (!IsGroup(node))
return false;
m_CurrentNode = node;
m_LastChannel = Editor->GetDrawList()->_Splitter._Current;
Editor->Suspend(SuspendFlags::KeepSplitter);
const auto alpha = ImMax(0.0f, std::min(1.0f, (view.Scale - c_min_zoom) / (c_max_zoom - c_min_zoom)));
Editor->GetDrawList()->ChannelsSetCurrent(c_UserChannel_HintsBackground);
ImGui::PushClipRect(rect.Min + ImVec2(1, 1), rect.Max - ImVec2(1, 1), false);
Editor->GetDrawList()->ChannelsSetCurrent(c_UserChannel_Hints);
ImGui::PushClipRect(rect.Min + ImVec2(1, 1), rect.Max - ImVec2(1, 1), false);
ImGui::PushStyleVar(ImGuiStyleVar_Alpha, alpha);
m_IsActive = true;
return true;
}
void ed::HintBuilder::End()
{
if (!m_IsActive)
return;
ImGui::PopStyleVar();
Editor->GetDrawList()->ChannelsSetCurrent(c_UserChannel_Hints);
ImGui::PopClipRect();
Editor->GetDrawList()->ChannelsSetCurrent(c_UserChannel_HintsBackground);
ImGui::PopClipRect();
Editor->GetDrawList()->ChannelsSetCurrent(m_LastChannel);
Editor->Resume(SuspendFlags::KeepSplitter);
m_IsActive = false;
m_CurrentNode = nullptr;
}
ImVec2 ed::HintBuilder::GetGroupMin()
{
IM_ASSERT(nullptr != m_CurrentNode);
return Editor->ToScreen(m_CurrentNode->m_Bounds.Min);
}
ImVec2 ed::HintBuilder::GetGroupMax()
{
IM_ASSERT(nullptr != m_CurrentNode);
return Editor->ToScreen(m_CurrentNode->m_Bounds.Max);
}
ImDrawList* ed::HintBuilder::GetForegroundDrawList()
{
IM_ASSERT(nullptr != m_CurrentNode);
auto drawList = Editor->GetDrawList();
drawList->ChannelsSetCurrent(c_UserChannel_Hints);
return drawList;
}
ImDrawList* ed::HintBuilder::GetBackgroundDrawList()
{
IM_ASSERT(nullptr != m_CurrentNode);
auto drawList = Editor->GetDrawList();
drawList->ChannelsSetCurrent(c_UserChannel_HintsBackground);
return drawList;
}
//------------------------------------------------------------------------------
//
// Style
//
//------------------------------------------------------------------------------
void ed::Style::PushColor(StyleColor colorIndex, const ImVec4& color)
{
ColorModifier modifier;
modifier.Index = colorIndex;
modifier.Value = Colors[colorIndex];
m_ColorStack.push_back(modifier);
Colors[colorIndex] = color;
}
void ed::Style::PopColor(int count)
{
while (count > 0)
{
auto& modifier = m_ColorStack.back();
Colors[modifier.Index] = modifier.Value;
m_ColorStack.pop_back();
--count;
}
}
void ed::Style::PushVar(StyleVar varIndex, float value)
{
auto* var = GetVarFloatAddr(varIndex);
IM_ASSERT(var != nullptr);
VarModifier modifier;
modifier.Index = varIndex;
modifier.Value = ImVec4(*var, 0, 0, 0);
*var = value;
m_VarStack.push_back(modifier);
}
void ed::Style::PushVar(StyleVar varIndex, const ImVec2& value)
{
auto* var = GetVarVec2Addr(varIndex);
IM_ASSERT(var != nullptr);
VarModifier modifier;
modifier.Index = varIndex;
modifier.Value = ImVec4(var->x, var->y, 0, 0);
*var = value;
m_VarStack.push_back(modifier);
}
void ed::Style::PushVar(StyleVar varIndex, const ImVec4& value)
{
auto* var = GetVarVec4Addr(varIndex);
IM_ASSERT(var != nullptr);
VarModifier modifier;
modifier.Index = varIndex;
modifier.Value = *var;
*var = value;
m_VarStack.push_back(modifier);
}
void ed::Style::PopVar(int count)
{
while (count > 0)
{
auto& modifier = m_VarStack.back();
if (auto floatValue = GetVarFloatAddr(modifier.Index))
*floatValue = modifier.Value.x;
else if (auto vec2Value = GetVarVec2Addr(modifier.Index))
*vec2Value = ImVec2(modifier.Value.x, modifier.Value.y);
else if (auto vec4Value = GetVarVec4Addr(modifier.Index))
*vec4Value = modifier.Value;
m_VarStack.pop_back();
--count;
}
}
const char* ed::Style::GetColorName(StyleColor colorIndex) const
{
switch (colorIndex)
{
case StyleColor_Bg: return "Bg";
case StyleColor_Grid: return "Grid";
case StyleColor_NodeBg: return "NodeBg";
case StyleColor_NodeBorder: return "NodeBorder";
case StyleColor_HovNodeBorder: return "HoveredNodeBorder";
case StyleColor_SelNodeBorder: return "SelNodeBorder";
case StyleColor_NodeSelRect: return "NodeSelRect";
case StyleColor_NodeSelRectBorder: return "NodeSelRectBorder";
case StyleColor_HovLinkBorder: return "HoveredLinkBorder";
case StyleColor_SelLinkBorder: return "SelLinkBorder";
case StyleColor_HighlightLinkBorder: return "HighlightLinkBorder";
case StyleColor_LinkSelRect: return "LinkSelRect";
case StyleColor_LinkSelRectBorder: return "LinkSelRectBorder";
case StyleColor_PinRect: return "PinRect";
case StyleColor_PinRectBorder: return "PinRectBorder";
case StyleColor_Flow: return "Flow";
case StyleColor_FlowMarker: return "FlowMarker";
case StyleColor_GroupBg: return "GroupBg";
case StyleColor_GroupBorder: return "GroupBorder";
case StyleColor_Count: break;
}
IM_ASSERT(0);
return "Unknown";
}
float* ed::Style::GetVarFloatAddr(StyleVar idx)
{
switch (idx)
{
case StyleVar_NodeRounding: return &NodeRounding;
case StyleVar_NodeBorderWidth: return &NodeBorderWidth;
case StyleVar_HoveredNodeBorderWidth: return &HoveredNodeBorderWidth;
case StyleVar_SelectedNodeBorderWidth: return &SelectedNodeBorderWidth;
case StyleVar_PinRounding: return &PinRounding;
case StyleVar_PinBorderWidth: return &PinBorderWidth;
case StyleVar_LinkStrength: return &LinkStrength;
case StyleVar_ScrollDuration: return &ScrollDuration;
case StyleVar_FlowMarkerDistance: return &FlowMarkerDistance;
case StyleVar_FlowSpeed: return &FlowSpeed;
case StyleVar_FlowDuration: return &FlowDuration;
case StyleVar_PinCorners: return &PinCorners;
case StyleVar_PinRadius: return &PinRadius;
case StyleVar_PinArrowSize: return &PinArrowSize;
case StyleVar_PinArrowWidth: return &PinArrowWidth;
case StyleVar_GroupRounding: return &GroupRounding;
case StyleVar_GroupBorderWidth: return &GroupBorderWidth;
case StyleVar_HighlightConnectedLinks: return &HighlightConnectedLinks;
case StyleVar_SnapLinkToPinDir: return &SnapLinkToPinDir;
case StyleVar_HoveredNodeBorderOffset: return &HoverNodeBorderOffset;
case StyleVar_SelectedNodeBorderOffset: return &SelectedNodeBorderOffset;
default: return nullptr;
}
}
ImVec2* ed::Style::GetVarVec2Addr(StyleVar idx)
{
switch (idx)
{
case StyleVar_SourceDirection: return &SourceDirection;
case StyleVar_TargetDirection: return &TargetDirection;
case StyleVar_PivotAlignment: return &PivotAlignment;
case StyleVar_PivotSize: return &PivotSize;
case StyleVar_PivotScale: return &PivotScale;
default: return nullptr;
}
}
ImVec4* ed::Style::GetVarVec4Addr(StyleVar idx)
{
switch (idx)
{
case StyleVar_NodePadding: return &NodePadding;
default: return nullptr;
}
}
//------------------------------------------------------------------------------
//
// Config
//
//------------------------------------------------------------------------------
ed::Config::Config(const ax::NodeEditor::Config* config)
{
if (config)
*static_cast<ax::NodeEditor::Config*>(this) = *config;
}
std::string ed::Config::Load()
{
std::string data;
if (LoadSettings)
{
const auto size = LoadSettings(nullptr, UserPointer);
if (size > 0)
{
data.resize(size);
LoadSettings(const_cast<char*>(data.data()), UserPointer);
}
}
else if (SettingsFile)
{
std::ifstream file(SettingsFile);
if (file)
{
file.seekg(0, std::ios_base::end);
auto size = static_cast<size_t>(file.tellg());
file.seekg(0, std::ios_base::beg);
data.reserve(size);
data.assign(std::istreambuf_iterator<char>(file), std::istreambuf_iterator<char>());
}
}
return data;
}
std::string ed::Config::LoadNode(NodeId nodeId)
{
std::string data;
if (LoadNodeSettings)
{
const auto size = LoadNodeSettings(nodeId, nullptr, UserPointer);
if (size > 0)
{
data.resize(size);
LoadNodeSettings(nodeId, const_cast<char*>(data.data()), UserPointer);
}
}
return data;
}
void ed::Config::BeginSave()
{
if (BeginSaveSession)
BeginSaveSession(UserPointer);
}
bool ed::Config::Save(const std::string& data, SaveReasonFlags flags)
{
if (SaveSettings)
{
return SaveSettings(data.c_str(), data.size(), flags, UserPointer);
}
else if (SettingsFile)
{
std::ofstream settingsFile(SettingsFile);
if (settingsFile)
settingsFile << data;
return !!settingsFile;
}
return false;
}
bool ed::Config::SaveNode(NodeId nodeId, const std::string& data, SaveReasonFlags flags)
{
if (SaveNodeSettings)
return SaveNodeSettings(nodeId, data.c_str(), data.size(), flags, UserPointer);
return false;
}
void ed::Config::EndSave()
{
if (EndSaveSession)
EndSaveSession(UserPointer);
}