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//------------------------------------------------------------------------------ |
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// LICENSE |
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// This software is dual-licensed to the public domain and under the following |
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// license: you are granted a perpetual, irrevocable license to copy, modify, |
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// publish, and distribute this file as you see fit. |
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// |
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// CREDITS |
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// Written by Michal Cichon |
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//------------------------------------------------------------------------------ |
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#include "BlueprintNodeBuilder.hpp" |
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#include <imgui_internal.h> |
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//------------------------------------------------------------------------------ |
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ax::NodeEditor::Utilities::BlueprintNodeBuilder::BlueprintNodeBuilder(ImTextureID texture, int textureWidth, int textureHeight) |
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: HeaderTextureId(texture), HeaderTextureWidth(textureWidth), HeaderTextureHeight(textureHeight) {} |
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void ax::NodeEditor::Utilities::BlueprintNodeBuilder::Begin(ax::NodeEditor::NodeId id) |
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{ |
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HasHeader = false; |
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HeaderMin = HeaderMax = ImVec2(); |
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ax::NodeEditor::PushStyleVar(StyleVar_NodePadding, ImVec4(8, 4, 8, 8)); |
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ax::NodeEditor::BeginNode(id); |
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ImGui::PushID(id.AsPointer()); |
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CurrentNodeId = id; |
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SetStage(Stage::Begin); |
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} |
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void ax::NodeEditor::Utilities::BlueprintNodeBuilder::End() |
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{ |
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SetStage(Stage::End); |
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ax::NodeEditor::EndNode(); |
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if (ImGui::IsItemVisible()) |
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{ |
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auto alpha = static_cast<int>(255 * ImGui::GetStyle().Alpha); |
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auto* drawList = ax::NodeEditor::GetNodeBackgroundDrawList(CurrentNodeId); |
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const auto halfBorderWidth = ax::NodeEditor::GetStyle().NodeBorderWidth * 0.5F; |
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auto headerColor = IM_COL32(0, 0, 0, alpha) | (HeaderColor & IM_COL32(255, 255, 255, 0)); |
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if ((HeaderMax.x > HeaderMin.x) && (HeaderMax.y > HeaderMin.y) && HeaderTextureId) |
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{ |
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const auto uv = ImVec2( |
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(HeaderMax.x - HeaderMin.x) / (4.0F * static_cast<float>(HeaderTextureWidth)), |
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(HeaderMax.y - HeaderMin.y) / (4.0F * static_cast<float>(HeaderTextureHeight))); |
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drawList->AddImageRounded(HeaderTextureId, |
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HeaderMin - ImVec2(8 - halfBorderWidth, 4 - halfBorderWidth), |
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HeaderMax + ImVec2(8 - halfBorderWidth, 0), |
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ImVec2(0.0F, 0.0F), uv, |
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headerColor, GetStyle().NodeRounding, 1 | 2); |
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auto headerSeparatorMin = ImVec2(HeaderMin.x, HeaderMax.y); |
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auto headerSeparatorMax = ImVec2(HeaderMax.x, HeaderMin.y); |
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if ((headerSeparatorMax.x > headerSeparatorMin.x) && (headerSeparatorMax.y > headerSeparatorMin.y)) |
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{ |
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drawList->AddLine( |
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headerSeparatorMin + ImVec2(-(8 - halfBorderWidth), -0.5F), |
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headerSeparatorMax + ImVec2((8 - halfBorderWidth), -0.5F), |
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ImColor(255, 255, 255, 96 * alpha / (3 * 255)), 1.0F); |
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} |
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} |
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} |
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CurrentNodeId = 0; |
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ImGui::PopID(); |
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ax::NodeEditor::PopStyleVar(); |
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SetStage(Stage::Invalid); |
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} |
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void ax::NodeEditor::Utilities::BlueprintNodeBuilder::Header(const ImVec4& color) |
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{ |
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HeaderColor = ImColor(color); |
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SetStage(Stage::Header); |
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} |
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void ax::NodeEditor::Utilities::BlueprintNodeBuilder::EndHeader() |
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{ |
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SetStage(Stage::Content); |
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} |
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void ax::NodeEditor::Utilities::BlueprintNodeBuilder::Input(ax::NodeEditor::PinId id) |
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{ |
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if (CurrentStage == Stage::Begin) |
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{ |
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SetStage(Stage::Content); |
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} |
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const auto applyPadding = (CurrentStage == Stage::Input); |
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SetStage(Stage::Input); |
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if (applyPadding) |
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{ |
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ImGui::Spring(0); |
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} |
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Pin(id, PinKind::Input); |
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ImGui::BeginHorizontal(id.AsPointer()); |
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} |
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void ax::NodeEditor::Utilities::BlueprintNodeBuilder::EndInput() |
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{ |
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ImGui::EndHorizontal(); |
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EndPin(); |
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} |
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void ax::NodeEditor::Utilities::BlueprintNodeBuilder::Middle() |
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{ |
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if (CurrentStage == Stage::Begin) |
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{ |
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SetStage(Stage::Content); |
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} |
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SetStage(Stage::Middle); |
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} |
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void ax::NodeEditor::Utilities::BlueprintNodeBuilder::Output(ax::NodeEditor::PinId id) |
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{ |
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if (CurrentStage == Stage::Begin) |
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{ |
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SetStage(Stage::Content); |
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} |
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const auto applyPadding = (CurrentStage == Stage::Output); |
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SetStage(Stage::Output); |
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if (applyPadding) |
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{ |
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ImGui::Spring(0); |
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} |
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Pin(id, PinKind::Output); |
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ImGui::BeginHorizontal(id.AsPointer()); |
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} |
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void ax::NodeEditor::Utilities::BlueprintNodeBuilder::EndOutput() |
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{ |
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ImGui::EndHorizontal(); |
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EndPin(); |
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} |
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bool ax::NodeEditor::Utilities::BlueprintNodeBuilder::SetStage(Stage stage) |
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{ |
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if (stage == CurrentStage) |
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{ |
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return false; |
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} |
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auto oldStage = CurrentStage; |
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CurrentStage = stage; |
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switch (oldStage) |
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{ |
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case Stage::Begin: |
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break; |
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case Stage::Header: |
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ImGui::EndHorizontal(); |
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HeaderMin = ImGui::GetItemRectMin(); |
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HeaderMax = ImGui::GetItemRectMax(); |
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// spacing between header and content |
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ImGui::Spring(0, ImGui::GetStyle().ItemSpacing.y * 2.0F); |
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break; |
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case Stage::Content: |
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break; |
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case Stage::Input: |
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ax::NodeEditor::PopStyleVar(2); |
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ImGui::Spring(1, 0); |
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ImGui::EndVertical(); |
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// #debug |
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// ImGui::GetWindowDrawList()->AddRect( |
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// ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), IM_COL32(255, 0, 0, 255)); |
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break; |
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case Stage::Middle: |
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ImGui::EndVertical(); |
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// #debug |
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// ImGui::GetWindowDrawList()->AddRect( |
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// ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), IM_COL32(255, 0, 0, 255)); |
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break; |
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case Stage::Output: |
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ax::NodeEditor::PopStyleVar(2); |
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ImGui::Spring(1, 0); |
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ImGui::EndVertical(); |
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// #debug |
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// ImGui::GetWindowDrawList()->AddRect( |
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// ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), IM_COL32(255, 0, 0, 255)); |
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break; |
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case Stage::End: |
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// break; |
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case Stage::Invalid: |
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break; |
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} |
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switch (stage) |
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{ |
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case Stage::Begin: |
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ImGui::BeginVertical("node"); |
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break; |
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case Stage::Header: |
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HasHeader = true; |
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ImGui::BeginHorizontal("header"); |
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break; |
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case Stage::Content: |
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if (oldStage == Stage::Begin) |
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{ |
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ImGui::Spring(0); |
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} |
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ImGui::BeginHorizontal("content"); |
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ImGui::Spring(0, 0); |
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break; |
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case Stage::Input: |
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ImGui::BeginVertical("inputs", ImVec2(0, 0), 0.0F); |
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ax::NodeEditor::PushStyleVar(ax::NodeEditor::StyleVar_PivotAlignment, ImVec2(0, 0.5F)); |
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ax::NodeEditor::PushStyleVar(ax::NodeEditor::StyleVar_PivotSize, ImVec2(0, 0)); |
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if (!HasHeader) |
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{ |
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ImGui::Spring(1, 0); |
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} |
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break; |
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case Stage::Middle: |
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ImGui::Spring(1); |
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ImGui::BeginVertical("middle", ImVec2(0, 0), 1.0F); |
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break; |
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case Stage::Output: |
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if (oldStage == Stage::Middle || oldStage == Stage::Input) |
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{ |
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ImGui::Spring(1); |
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} |
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else |
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{ |
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ImGui::Spring(1, 0); |
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} |
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ImGui::BeginVertical("outputs", ImVec2(0, 0), 1.0F); |
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ax::NodeEditor::PushStyleVar(ax::NodeEditor::StyleVar_PivotAlignment, ImVec2(1.0F, 0.5F)); |
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ax::NodeEditor::PushStyleVar(ax::NodeEditor::StyleVar_PivotSize, ImVec2(0, 0)); |
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if (!HasHeader) |
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{ |
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ImGui::Spring(1, 0); |
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} |
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break; |
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case Stage::End: |
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if (oldStage == Stage::Input) |
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{ |
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ImGui::Spring(1, 0); |
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} |
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if (oldStage != Stage::Begin) |
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{ |
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ImGui::EndHorizontal(); |
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} |
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ContentMin = ImGui::GetItemRectMin(); |
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ContentMax = ImGui::GetItemRectMax(); |
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// ImGui::Spring(0); |
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ImGui::EndVertical(); |
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NodeMin = ImGui::GetItemRectMin(); |
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NodeMax = ImGui::GetItemRectMax(); |
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break; |
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case Stage::Invalid: |
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break; |
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} |
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return true; |
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} |
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void ax::NodeEditor::Utilities::BlueprintNodeBuilder::Pin(ax::NodeEditor::PinId id, ax::NodeEditor::PinKind kind) |
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{ |
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ax::NodeEditor::BeginPin(id, kind); |
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} |
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void ax::NodeEditor::Utilities::BlueprintNodeBuilder::EndPin() |
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{ |
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ax::NodeEditor::EndPin(); |
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// #debug |
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// ImGui::GetWindowDrawList()->AddRectFilled( |
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// ImGui::GetItemRectMin(), ImGui::GetItemRectMax(), IM_COL32(255, 0, 0, 64)); |
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} |
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