C++ TSharedRef::GetChildWindows方法代码示例

bool FSlateWindowHelper::FindPathToWidget( const TArray<TSharedRef<SWindow>>& WindowsToSearch,  TSharedRef<const SWidget> InWidget, FWidgetPath& OutWidgetPath, EVisibility VisibilityFilter )
{
	SCOPE_CYCLE_COUNTER(STAT_FindPathToWidget);

	// Iterate over our top level windows
	bool bFoundWidget = false;

	for (int32 WindowIndex = 0; !bFoundWidget && WindowIndex < WindowsToSearch.Num(); ++WindowIndex)
	{
		// Make a widget path that contains just the top-level window
		TSharedRef<SWindow> CurWindow = WindowsToSearch[WindowIndex];
		
		FArrangedChildren JustWindow(VisibilityFilter);
		{
			JustWindow.AddWidget(FArrangedWidget(CurWindow, CurWindow->GetWindowGeometryInScreen()));
		}
		
		FWidgetPath PathToWidget(CurWindow, JustWindow);
		
		// Attempt to extend it to the desired child widget; essentially a full-window search for 'InWidget
		if ((CurWindow == InWidget) || PathToWidget.ExtendPathTo(FWidgetMatcher(InWidget), VisibilityFilter))
		{
			OutWidgetPath = PathToWidget;
			bFoundWidget = true;
		}

		if (!bFoundWidget)
		{
			// Search this window's children
			bFoundWidget = FindPathToWidget(CurWindow->GetChildWindows(), InWidget, OutWidgetPath, VisibilityFilter);
		}
	}

	return bFoundWidget;
}

void STutorialRoot::MaybeAddOverlay(TSharedRef<SWindow> InWindow)
{
	if(InWindow->HasOverlay())
	{
		// check we don't already have a widget overlay for this window
		TWeakPtr<SEditorTutorials>* FoundWidget = TutorialWidgets.Find(InWindow);
		if(FoundWidget == nullptr)
		{
			TSharedPtr<SEditorTutorials> TutorialWidget = nullptr;
			InWindow->AddOverlaySlot()
			[
				SNew(SHorizontalBox)
				+SHorizontalBox::Slot()
				.VAlign(VAlign_Fill)
				.HAlign(HAlign_Fill)
				[
					SAssignNew(TutorialWidget, SEditorTutorials)
					.ParentWindow(InWindow)
					.OnNextClicked(FOnNextClicked::CreateSP(this, &STutorialRoot::HandleNextClicked))
					.OnBackClicked(FSimpleDelegate::CreateSP(this, &STutorialRoot::HandleBackClicked))
					.OnHomeClicked(FSimpleDelegate::CreateSP(this, &STutorialRoot::HandleHomeClicked))
					.OnCloseClicked(FSimpleDelegate::CreateSP(this, &STutorialRoot::HandleCloseClicked))
					.OnGetCurrentTutorial(FOnGetCurrentTutorial::CreateSP(this, &STutorialRoot::HandleGetCurrentTutorial))
					.OnGetCurrentTutorialStage(FOnGetCurrentTutorialStage::CreateSP(this, &STutorialRoot::HandleGetCurrentTutorialStage))
					.OnLaunchTutorial(FOnLaunchTutorial::CreateSP(this, &STutorialRoot::LaunchTutorial))
					.OnWasWidgetDrawn(FOnWasWidgetDrawn::CreateSP(this, &STutorialRoot::WasWidgetDrawn))
					.OnWidgetWasDrawn(FOnWidgetWasDrawn::CreateSP(this, &STutorialRoot::WidgetWasDrawn))
				]
			];

			FoundWidget = &TutorialWidgets.Add(InWindow, TutorialWidget);

			FoundWidget->Pin()->RebuildCurrentContent();
		}
	}

	TArray<TSharedRef<SWindow>> ChildWindows = InWindow->GetChildWindows();
	for(auto& ChildWindow : ChildWindows)
	{
		MaybeAddOverlay(ChildWindow);
	}
}

TSharedPtr<SWindow> FSlateWindowHelper::FindWindowByPlatformWindow( const TArray< TSharedRef<SWindow> >& WindowsToSearch, const TSharedRef< FGenericWindow >& PlatformWindow )
{
	for (int32 WindowIndex = 0; WindowIndex < WindowsToSearch.Num(); ++WindowIndex)
	{
		TSharedRef<SWindow> SomeWindow = WindowsToSearch[WindowIndex];
		TSharedRef<FGenericWindow> SomeNativeWindow = StaticCastSharedRef<FGenericWindow>(SomeWindow->GetNativeWindow().ToSharedRef());
		
		if (SomeNativeWindow == PlatformWindow)
		{
			return SomeWindow;
		}

		// Search child windows
		TSharedPtr<SWindow> FoundChildWindow = FindWindowByPlatformWindow(SomeWindow->GetChildWindows(), PlatformWindow);

		if (FoundChildWindow.IsValid())
		{
			return FoundChildWindow;
		}
	}

	return TSharedPtr<SWindow>(nullptr);
}