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ResourceGraphs - Adding ImGuiNodeEditor
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| Original file line number | Diff line number | Diff line change |
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| //------------------------------------------------------------------------------ | ||
| // 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 | ||
| //------------------------------------------------------------------------------ | ||
| # define IMGUI_DEFINE_MATH_OPERATORS | ||
| # include "builders.h" | ||
| # include <imgui_internal.h> | ||
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| //------------------------------------------------------------------------------ | ||
| namespace ed = ax::NodeEditor; | ||
| namespace util = ax::NodeEditor::Utilities; | ||
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| util::BlueprintNodeBuilder::BlueprintNodeBuilder(ImTextureID texture, int textureWidth, int textureHeight): | ||
| HeaderTextureId(texture), | ||
| HeaderTextureWidth(textureWidth), | ||
| HeaderTextureHeight(textureHeight), | ||
| CurrentNodeId(0), | ||
| CurrentStage(Stage::Invalid), | ||
| HasHeader(false) | ||
| { | ||
| } | ||
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| void util::BlueprintNodeBuilder::Begin(ed::NodeId id) | ||
| { | ||
| HasHeader = false; | ||
| HeaderMin = HeaderMax = ImVec2(); | ||
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| ed::PushStyleVar(StyleVar_NodePadding, ImVec4(8, 4, 8, 8)); | ||
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| ed::BeginNode(id); | ||
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| ImGui::PushID(id.AsPointer()); | ||
| CurrentNodeId = id; | ||
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| SetStage(Stage::Begin); | ||
| } | ||
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| void util::BlueprintNodeBuilder::End() | ||
| { | ||
| SetStage(Stage::End); | ||
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| ed::EndNode(); | ||
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| if (ImGui::IsItemVisible()) | ||
| { | ||
| auto alpha = static_cast<int>(255 * ImGui::GetStyle().Alpha); | ||
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| auto drawList = ed::GetNodeBackgroundDrawList(CurrentNodeId); | ||
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| const auto halfBorderWidth = ed::GetStyle().NodeBorderWidth * 0.5f; | ||
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| auto headerColor = IM_COL32(0, 0, 0, alpha) | (HeaderColor & IM_COL32(255, 255, 255, 0)); | ||
| if ((HeaderMax.x > HeaderMin.x) && (HeaderMax.y > HeaderMin.y) && HeaderTextureId) | ||
| { | ||
| const auto uv = ImVec2( | ||
| (HeaderMax.x - HeaderMin.x) / (float)(4.0f * HeaderTextureWidth), | ||
| (HeaderMax.y - HeaderMin.y) / (float)(4.0f * HeaderTextureHeight)); | ||
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| drawList->AddImageRounded(HeaderTextureId, | ||
| HeaderMin - ImVec2(8 - halfBorderWidth, 4 - halfBorderWidth), | ||
| HeaderMax + ImVec2(8 - halfBorderWidth, 0), | ||
| ImVec2(0.0f, 0.0f), uv, | ||
| #if IMGUI_VERSION_NUM > 18101 | ||
| headerColor, GetStyle().NodeRounding, ImDrawFlags_RoundCornersTop); | ||
| #else | ||
| headerColor, GetStyle().NodeRounding, 1 | 2); | ||
| #endif | ||
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| if (ContentMin.y > HeaderMax.y) | ||
| { | ||
| drawList->AddLine( | ||
| ImVec2(HeaderMin.x - (8 - halfBorderWidth), HeaderMax.y - 0.5f), | ||
| ImVec2(HeaderMax.x + (8 - halfBorderWidth), HeaderMax.y - 0.5f), | ||
| ImColor(255, 255, 255, 96 * alpha / (3 * 255)), 1.0f); | ||
| } | ||
| } | ||
| } | ||
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| CurrentNodeId = 0; | ||
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| ImGui::PopID(); | ||
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| ed::PopStyleVar(); | ||
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| SetStage(Stage::Invalid); | ||
| } | ||
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| void util::BlueprintNodeBuilder::Header(const ImVec4& color) | ||
| { | ||
| HeaderColor = ImColor(color); | ||
| SetStage(Stage::Header); | ||
| } | ||
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| void util::BlueprintNodeBuilder::EndHeader() | ||
| { | ||
| SetStage(Stage::Content); | ||
| } | ||
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| void util::BlueprintNodeBuilder::Input(ed::PinId id) | ||
| { | ||
| if (CurrentStage == Stage::Begin) | ||
| SetStage(Stage::Content); | ||
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| const auto applyPadding = (CurrentStage == Stage::Input); | ||
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| SetStage(Stage::Input); | ||
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| if (applyPadding) | ||
| ImGui::Spring(0); | ||
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| Pin(id, PinKind::Input); | ||
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| ImGui::BeginHorizontal(id.AsPointer()); | ||
| } | ||
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| void util::BlueprintNodeBuilder::EndInput() | ||
| { | ||
| ImGui::EndHorizontal(); | ||
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| EndPin(); | ||
| } | ||
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| void util::BlueprintNodeBuilder::Middle() | ||
| { | ||
| if (CurrentStage == Stage::Begin) | ||
| SetStage(Stage::Content); | ||
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| SetStage(Stage::Middle); | ||
| } | ||
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| void util::BlueprintNodeBuilder::Output(ed::PinId id) | ||
| { | ||
| if (CurrentStage == Stage::Begin) | ||
| SetStage(Stage::Content); | ||
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| const auto applyPadding = (CurrentStage == Stage::Output); | ||
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| SetStage(Stage::Output); | ||
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| if (applyPadding) | ||
| ImGui::Spring(0); | ||
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| Pin(id, PinKind::Output); | ||
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| ImGui::BeginHorizontal(id.AsPointer()); | ||
| } | ||
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| void util::BlueprintNodeBuilder::EndOutput() | ||
| { | ||
| ImGui::EndHorizontal(); | ||
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| EndPin(); | ||
| } | ||
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| bool util::BlueprintNodeBuilder::SetStage(Stage stage) | ||
| { | ||
| if (stage == CurrentStage) | ||
| return false; | ||
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| auto oldStage = CurrentStage; | ||
| CurrentStage = stage; | ||
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| ImVec2 cursor; | ||
| switch (oldStage) | ||
| { | ||
| case Stage::Begin: | ||
| break; | ||
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| case Stage::Header: | ||
| ImGui::EndHorizontal(); | ||
| HeaderMin = ImGui::GetItemRectMin(); | ||
| HeaderMax = ImGui::GetItemRectMax(); | ||
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| // spacing between header and content | ||
| ImGui::Spring(0, ImGui::GetStyle().ItemSpacing.y * 2.0f); | ||
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| break; | ||
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| case Stage::Content: | ||
| break; | ||
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| case Stage::Input: | ||
| ed::PopStyleVar(2); | ||
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| ImGui::Spring(1, 0); | ||
| ImGui::EndVertical(); | ||
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| // #debug | ||
| // ImGui::GetWindowDrawList()->AddRect( | ||
| // ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), IM_COL32(255, 0, 0, 255)); | ||
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| break; | ||
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| case Stage::Middle: | ||
| ImGui::EndVertical(); | ||
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| // #debug | ||
| // ImGui::GetWindowDrawList()->AddRect( | ||
| // ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), IM_COL32(255, 0, 0, 255)); | ||
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| break; | ||
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| case Stage::Output: | ||
| ed::PopStyleVar(2); | ||
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| ImGui::Spring(1, 0); | ||
| ImGui::EndVertical(); | ||
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| // #debug | ||
| // ImGui::GetWindowDrawList()->AddRect( | ||
| // ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), IM_COL32(255, 0, 0, 255)); | ||
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| break; | ||
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| case Stage::End: | ||
| break; | ||
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| case Stage::Invalid: | ||
| break; | ||
| } | ||
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| switch (stage) | ||
| { | ||
| case Stage::Begin: | ||
| ImGui::BeginVertical("node"); | ||
| break; | ||
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| case Stage::Header: | ||
| HasHeader = true; | ||
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| ImGui::BeginHorizontal("header"); | ||
| break; | ||
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| case Stage::Content: | ||
| if (oldStage == Stage::Begin) | ||
| ImGui::Spring(0); | ||
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| ImGui::BeginHorizontal("content"); | ||
| ImGui::Spring(0, 0); | ||
| break; | ||
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| case Stage::Input: | ||
| ImGui::BeginVertical("inputs", ImVec2(0, 0), 0.0f); | ||
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| ed::PushStyleVar(ed::StyleVar_PivotAlignment, ImVec2(0, 0.5f)); | ||
| ed::PushStyleVar(ed::StyleVar_PivotSize, ImVec2(0, 0)); | ||
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| if (!HasHeader) | ||
| ImGui::Spring(1, 0); | ||
| break; | ||
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| case Stage::Middle: | ||
| ImGui::Spring(1); | ||
| ImGui::BeginVertical("middle", ImVec2(0, 0), 1.0f); | ||
| break; | ||
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| case Stage::Output: | ||
| if (oldStage == Stage::Middle || oldStage == Stage::Input) | ||
| ImGui::Spring(1); | ||
| else | ||
| ImGui::Spring(1, 0); | ||
| ImGui::BeginVertical("outputs", ImVec2(0, 0), 1.0f); | ||
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| ed::PushStyleVar(ed::StyleVar_PivotAlignment, ImVec2(1.0f, 0.5f)); | ||
| ed::PushStyleVar(ed::StyleVar_PivotSize, ImVec2(0, 0)); | ||
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| if (!HasHeader) | ||
| ImGui::Spring(1, 0); | ||
| break; | ||
|
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| case Stage::End: | ||
| if (oldStage == Stage::Input) | ||
| ImGui::Spring(1, 0); | ||
| if (oldStage != Stage::Begin) | ||
| ImGui::EndHorizontal(); | ||
| ContentMin = ImGui::GetItemRectMin(); | ||
| ContentMax = ImGui::GetItemRectMax(); | ||
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| //ImGui::Spring(0); | ||
| ImGui::EndVertical(); | ||
| NodeMin = ImGui::GetItemRectMin(); | ||
| NodeMax = ImGui::GetItemRectMax(); | ||
| break; | ||
|
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| case Stage::Invalid: | ||
| break; | ||
| } | ||
|
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| return true; | ||
| } | ||
|
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| void util::BlueprintNodeBuilder::Pin(ed::PinId id, ed::PinKind kind) | ||
| { | ||
| ed::BeginPin(id, kind); | ||
| } | ||
|
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| void util::BlueprintNodeBuilder::EndPin() | ||
| { | ||
| ed::EndPin(); | ||
|
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| // #debug | ||
| // ImGui::GetWindowDrawList()->AddRectFilled( | ||
| // ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), IM_COL32(255, 0, 0, 64)); | ||
| } |
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