mirror of
https://github.com/kevinporetti/UnrealImGui.git
synced 2025-01-19 00:40:32 +00:00
b492932055
- Replaced 'ImGui.DebugDrawOnWorldTick' with DRAW_EVENTS_ON_WORLD_TICK_START switch to enforce consistency in project setup. - Added DRAW_EVENTS_ON_POST_ACTOR_TICK to support post actor tick events (only for UE 4.18 or later). - Added DRAW_EVENTS_ORDER_WORLD_BEFORE_MULTI_CONTEXT to allow explicitly define order between multi-context and world-context draw events. - Rules can be configured in ImGui.Build.cs file.
117 lines
3.6 KiB
C++
117 lines
3.6 KiB
C++
// Distributed under the MIT License (MIT) (see accompanying LICENSE file)
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#pragma once
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#include "ImGuiContextProxy.h"
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#include "ImGuiDemo.h"
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// Manages ImGui context proxies.
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class FImGuiContextManager
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{
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public:
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FImGuiContextManager();
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FImGuiContextManager(const FImGuiContextManager&) = delete;
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FImGuiContextManager& operator=(const FImGuiContextManager&) = delete;
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FImGuiContextManager(FImGuiContextManager&&) = delete;
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FImGuiContextManager& operator=(FImGuiContextManager&&) = delete;
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~FImGuiContextManager();
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ImFontAtlas& GetFontAtlas() { return FontAtlas; }
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const ImFontAtlas& GetFontAtlas() const { return FontAtlas; }
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#if WITH_EDITOR
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// Get or create editor ImGui context proxy.
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FORCEINLINE FImGuiContextProxy& GetEditorContextProxy() { return GetEditorContextData().ContextProxy; }
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#endif
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#if !WITH_EDITOR
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// Get or create standalone game ImGui context proxy.
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FORCEINLINE FImGuiContextProxy& GetWorldContextProxy() { return GetStandaloneWorldContextData().ContextProxy; }
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#endif
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// Get or create ImGui context proxy for given world.
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FORCEINLINE FImGuiContextProxy& GetWorldContextProxy(const UWorld& World) { return GetWorldContextData(World).ContextProxy; }
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// Get or create ImGui context proxy for given world. Additionally get context index for that proxy.
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FORCEINLINE FImGuiContextProxy& GetWorldContextProxy(const UWorld& World, int32& OutContextIndex) { return GetWorldContextData(World, &OutContextIndex).ContextProxy; }
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// Get context proxy by index, or null if context with that index doesn't exist.
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FORCEINLINE FImGuiContextProxy* GetContextProxy(int32 ContextIndex)
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{
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FContextData* Data = Contexts.Find(ContextIndex);
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return Data ? &(Data->ContextProxy) : nullptr;
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}
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// Delegate called for all contexts in manager, right after calling context specific draw event. Allows listeners
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// draw the same content to multiple contexts.
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FSimpleMulticastDelegate& OnDrawMultiContext() { return DrawMultiContextEvent; }
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void Tick(float DeltaSeconds);
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private:
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#if WITH_EDITOR
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struct FContextData
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{
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FContextData(const FString& ContextName, int32 ContextIndex, FSimpleMulticastDelegate& SharedDrawEvent, ImFontAtlas& FontAtlas, FImGuiDemo& Demo, int32 InPIEInstance = -1)
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: PIEInstance(InPIEInstance)
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, ContextProxy(ContextName, &SharedDrawEvent, &FontAtlas)
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{
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ContextProxy.OnDraw().AddLambda([&Demo, ContextIndex]() { Demo.DrawControls(ContextIndex); });
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}
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FORCEINLINE bool CanTick() const { return PIEInstance < 0 || GEngine->GetWorldContextFromPIEInstance(PIEInstance); }
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int32 PIEInstance = -1;
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FImGuiContextProxy ContextProxy;
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};
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#else
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struct FContextData
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{
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FContextData(const FString& ContextName, int32 ContextIndex, FSimpleMulticastDelegate& SharedDrawEvent, ImFontAtlas& FontAtlas, FImGuiDemo& Demo)
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: ContextProxy(ContextName, &SharedDrawEvent, &FontAtlas)
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{
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ContextProxy.OnDraw().AddLambda([&Demo, ContextIndex]() { Demo.DrawControls(ContextIndex); });
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}
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FORCEINLINE bool CanTick() const { return true; }
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FImGuiContextProxy ContextProxy;
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};
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#endif // WITH_EDITOR
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void OnWorldTickStart(ELevelTick TickType, float DeltaSeconds);
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#if DRAW_EVENTS_ON_POST_ACTOR_TICK
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void OnWorldPostActorTick(UWorld* World, ELevelTick TickType, float DeltaSeconds);
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#endif
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#if WITH_EDITOR
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FContextData& GetEditorContextData();
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#endif
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#if !WITH_EDITOR
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FContextData& GetStandaloneWorldContextData();
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#endif
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FContextData& GetWorldContextData(const UWorld& World, int32* OutContextIndex = nullptr);
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TMap<int32, FContextData> Contexts;
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FImGuiDemo ImGuiDemo;
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FSimpleMulticastDelegate DrawMultiContextEvent;
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ImFontAtlas FontAtlas;
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};
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