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Fix issue with ImGui popup/modal windows not being able to be closed in transparent mouse input mode. The issue was caused by relying on ImGui::IsWindowHovered to determine whether an ImGui window was being hovered over, which doesn't work as expected with popups and modals. The ImGui documentation instead recommends using ImGuiIO::WantCaptureMouse to determine mouse input forwarding, so now SImGuiWidget relies on this value to update it's transparent mouse input state. (#25)

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yash3ahuja 2020-03-24 18:26:14 -07:00 committed by GitHub
parent a35585f26a
commit 73cdfe8d83
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 9 additions and 2 deletions
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2
Source/ImGui/Private/ImGuiContextProxy.cpp
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@ -158,6 +158,8 @@ void FImGuiContextProxy::BeginFrame(float DeltaTime)
ImGui::NewFrame();
bWantsMouseCapture = IO.WantCaptureMouse;
bIsFrameStarted = true;
bIsDrawEarlyDebugCalled = false;
bIsDrawDebugCalled = false;

5
Source/ImGui/Private/ImGuiContextProxy.h
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@ -53,6 +53,9 @@ public:
// Whether this context has mouse hovering any window (read once per frame during context update).
bool IsMouseHoveringAnyWindow() const { return bIsMouseHoveringAnyWindow; }
// Whether ImGui will use the mouse inputs.
bool WantsMouseCapture() const { return bWantsMouseCapture; }
// Cursor type desired by this context (updated once per frame during context update).
EMouseCursor::Type GetMouseCursor() const { return MouseCursor; }
@ -93,6 +96,8 @@ private:
bool bIsDrawEarlyDebugCalled = false;
bool bIsDrawDebugCalled = false;
bool bWantsMouseCapture = false;
FImGuiInputState InputState;
TArray<FImGuiDrawList> DrawLists;

4
Source/ImGui/Private/Widgets/SImGuiWidget.cpp
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@ -390,13 +390,13 @@ void SImGuiWidget::ReturnFocus()
void SImGuiWidget::UpdateInputState()
{
auto& Properties = ModuleManager->GetProperties();
auto* ContextPropxy = ModuleManager->GetContextManager().GetContextProxy(ContextIndex);
auto* ContextProxy = ModuleManager->GetContextManager().GetContextProxy(ContextIndex);
const bool bEnableTransparentMouseInput = Properties.IsMouseInputShared()
#if PLATFORM_ANDROID || PLATFORM_IOS
&& (FSlateApplication::Get().GetCursorPos() != FVector2D::ZeroVector)
#endif
&& !(ContextPropxy->IsMouseHoveringAnyWindow() || ContextPropxy->HasActiveItem());
&& !(ContextProxy->WantsMouseCapture() || ContextProxy->HasActiveItem());
if (bTransparentMouseInput != bEnableTransparentMouseInput)
{
bTransparentMouseInput = bEnableTransparentMouseInput;