Exemplo n.º 1
0
FReply SDockingTabWell::StartDraggingTab( TSharedRef<SDockTab> TabToStartDragging, FVector2D InTabGrabOffsetFraction, const FPointerEvent& MouseEvent )
{
	Tabs.Remove(TabToStartDragging);
	// We just removed the foreground tab.
	ForegroundTabIndex = INDEX_NONE;
	ParentTabStackPtr.Pin()->OnTabRemoved(TabToStartDragging->GetLayoutIdentifier());

	// Tha tab well keeps track of which tab we are dragging; we treat is specially during rendering and layout.
	TabBeingDraggedPtr = TabToStartDragging;
		
	TabGrabOffsetFraction = InTabGrabOffsetFraction;

	// We are about to start dragging a tab, so make sure its offset is correct
	this->ChildBeingDraggedOffset = ComputeDraggedTabOffset( MouseEvent.FindGeometry(SharedThis(this)), MouseEvent, InTabGrabOffsetFraction );

	// Start dragging.
	TSharedRef<FDockingDragOperation> DragDropOperation =
		FDockingDragOperation::New(
			TabToStartDragging,
			InTabGrabOffsetFraction,
			GetDockArea().ToSharedRef(),
			ParentTabStackPtr.Pin()->GetTabStackGeometry().Size
		);

	return FReply::Handled().BeginDragDrop( DragDropOperation );
}
Exemplo n.º 2
0
FReply SDockingTabWell::StartDraggingTab( TSharedRef<SDockTab> TabToStartDragging, FVector2D InTabGrabOffsetFraction, const FPointerEvent& MouseEvent )
{
	const bool bCanLeaveTabWell = TabToStartDragging->GetTabManager()->GetPrivateApi().CanTabLeaveTabWell( TabToStartDragging );

	// We are about to start dragging a tab, so make sure its offset is correct
	this->ChildBeingDraggedOffset = ComputeDraggedTabOffset( MouseEvent.FindGeometry(SharedThis(this)), MouseEvent, InTabGrabOffsetFraction );

	// Tha tab well keeps track of which tab we are dragging; we treat is specially during rendering and layout.
	TabBeingDraggedPtr = TabToStartDragging;	
	TabGrabOffsetFraction = InTabGrabOffsetFraction;
	Tabs.Remove(TabToStartDragging);
	

	if (bCanLeaveTabWell)
	{
		// We just removed the foreground tab.
		ForegroundTabIndex = INDEX_NONE;
		ParentTabStackPtr.Pin()->OnTabRemoved(TabToStartDragging->GetLayoutIdentifier());

#if PLATFORM_MAC
		// On Mac we need to activate the app as we may be dragging a window that is set to be invisible if the app is inactive
		FPlatformMisc::ActivateApplication();
#endif

		// Start dragging.
		TSharedRef<FDockingDragOperation> DragDropOperation =
			FDockingDragOperation::New(
				TabToStartDragging,
				InTabGrabOffsetFraction,
				GetDockArea().ToSharedRef(),
				ParentTabStackPtr.Pin()->GetTabStackGeometry().Size
			);

		return FReply::Handled().BeginDragDrop( DragDropOperation );
	}
	else
	{
		return FReply::Handled().CaptureMouse(SharedThis(this));
	}
}