mirror of
https://github.com/kevinporetti/UnrealImGui.git
synced 2025-01-18 16:30:32 +00:00
052ae0a201
- ImGui Context Proxy Tick function has been split for Tick and Draw. Both functions may now be called separately from different places but they will be processed only once per frame. This opens possibility to define own mechanisms to trigger draw events and to independently update contexts. - Multi-context draw event delegate is passed to ImGui Context Proxy during construction rather than as an argument of Tick function. - To minimise lag between ending ImGui frame and rendering its output, ImGui Widget updates its own context just before painting. - Contexts without widget (editor, dedicated server) are updated by manager during post-tick event. - Instead of setting global CurrentContextIndex by ImGui Context Manager, information about context is passed to ImGui Demo as part of a closure. - Fixed bug in ImGui Demo where inactive contexts were triggering multi-PIE warning.
109 lines
3.2 KiB
C++
109 lines
3.2 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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#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, FImGuiDemo& Demo, int32 InPIEInstance = -1)
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: PIEInstance(InPIEInstance)
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, ContextProxy(ContextName, &SharedDrawEvent)
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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, FImGuiDemo& Demo)
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: ContextProxy(ContextName, &SharedDrawEvent)
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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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#if WITH_EDITOR
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void OnWorldTickStart(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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};
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