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Added automatic ImGui context switching when updating different editor and PIE worlds. Allows to use ImGui API during world update with controls being drawn in correct viewport.

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This commit is contained in:
Sebastian 2017-10-28 22:25:44 +01:00
parent 126b59d2c6
commit 3f33545f8b
3 changed files with 54 additions and 2 deletions
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33
Source/ImGui/Private/ImGuiContextManager.cpp
View File

@ -55,8 +55,19 @@ namespace
#endif // WITH_EDITOR
}
FImGuiContextManager::FImGuiContextManager()
{
#if WITH_EDITOR
FWorldDelegates::OnWorldTickStart.AddRaw(this, &FImGuiContextManager::OnWorldTickStart);
#endif
}
FImGuiContextManager::~FImGuiContextManager()
{
#if WITH_EDITOR
// Order matters because contexts can be created during World Tick Start events.
FWorldDelegates::OnWorldTickStart.RemoveAll(this);
#endif
Contexts.Empty();
ImGui::Shutdown();
}
@ -77,6 +88,16 @@ void FImGuiContextManager::Tick(float DeltaSeconds)
}
}
#if WITH_EDITOR
void FImGuiContextManager::OnWorldTickStart(ELevelTick TickType, float DeltaSeconds)
{
if (GWorld)
{
GetWorldContextProxy(*GWorld).SetAsCurrent();
}
}
#endif // WITH_EDITOR
#if WITH_EDITOR
FImGuiContextManager::FContextData& FImGuiContextManager::GetEditorContextData()
{
@ -109,6 +130,18 @@ FImGuiContextManager::FContextData& FImGuiContextManager::GetWorldContextData(co
{
using namespace Utilities;
#if WITH_EDITOR
if (World.WorldType == EWorldType::Editor)
{
if (OutIndex)
{
*OutIndex = Utilities::EDITOR_CONTEXT_INDEX;
}
return GetEditorContextData();
}
#endif
const FWorldContext* WorldContext = GetWorldContext(World);
const int32 Index = GetWorldContextIndex(*WorldContext);

6
Source/ImGui/Private/ImGuiContextManager.h
View File

@ -11,7 +11,7 @@ class FImGuiContextManager
{
public:
FImGuiContextManager() = default;
FImGuiContextManager();
FImGuiContextManager(const FImGuiContextManager&) = delete;
FImGuiContextManager& operator=(const FImGuiContextManager&) = delete;
@ -86,6 +86,10 @@ private:
#endif // WITH_EDITOR
#if WITH_EDITOR
void OnWorldTickStart(ELevelTick TickType, float DeltaSeconds);
#endif
#if WITH_EDITOR
FContextData& GetEditorContextData();
#endif

17
Source/ImGui/Private/Utilities/WorldContextIndex.h
View File

@ -38,7 +38,22 @@ namespace Utilities
// In single-PIE with dedicated server or multi-PIE sessions worlds have PIEInstance starting from 1 for server
// and 2+ for clients, what maps directly to our index.
return WorldContext.WorldType == EWorldType::PIE ? FMath::Max(WorldContext.PIEInstance, 1) : STANDALONE_GAME_CONTEXT_INDEX;
switch (WorldContext.WorldType)
{
case EWorldType::PIE:
return FMath::Max(WorldContext.PIEInstance, 1);
case EWorldType::Game:
return STANDALONE_GAME_CONTEXT_INDEX;
case EWorldType::Editor:
return EDITOR_CONTEXT_INDEX;
default:
return INVALID_CONTEXT_INDEX;
}
}
int32 GetWorldContextIndex(const UWorld& World)
{
return (World.WorldType == EWorldType::Editor) ? EDITOR_CONTEXT_INDEX : GetWorldContextIndex(World.GetGameInstance());
}
#else