126 lines
2.8 KiB
C++
126 lines
2.8 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
|
|
|
|
#include "Components/CanvasPanel.h"
|
|
#include "Layout/ArrangedChildren.h"
|
|
#include "Components/CanvasPanelSlot.h"
|
|
|
|
#include UE_INLINE_GENERATED_CPP_BY_NAME(CanvasPanel)
|
|
|
|
#define LOCTEXT_NAMESPACE "UMG"
|
|
|
|
/////////////////////////////////////////////////////
|
|
// UCanvasPanel
|
|
|
|
UCanvasPanel::UCanvasPanel(const FObjectInitializer& ObjectInitializer)
|
|
: Super(ObjectInitializer)
|
|
{
|
|
bIsVariable = false;
|
|
SetVisibilityInternal(ESlateVisibility::SelfHitTestInvisible);
|
|
}
|
|
|
|
void UCanvasPanel::ReleaseSlateResources(bool bReleaseChildren)
|
|
{
|
|
Super::ReleaseSlateResources(bReleaseChildren);
|
|
|
|
MyCanvas.Reset();
|
|
}
|
|
|
|
UClass* UCanvasPanel::GetSlotClass() const
|
|
{
|
|
return UCanvasPanelSlot::StaticClass();
|
|
}
|
|
|
|
void UCanvasPanel::OnSlotAdded(UPanelSlot* InSlot)
|
|
{
|
|
// Add the child to the live canvas if it already exists
|
|
if ( MyCanvas.IsValid() )
|
|
{
|
|
CastChecked<UCanvasPanelSlot>(InSlot)->BuildSlot(MyCanvas.ToSharedRef());
|
|
}
|
|
}
|
|
|
|
void UCanvasPanel::OnSlotRemoved(UPanelSlot* InSlot)
|
|
{
|
|
// Remove the widget from the live slot if it exists.
|
|
if ( MyCanvas.IsValid() && InSlot->Content)
|
|
{
|
|
TSharedPtr<SWidget> Widget = InSlot->Content->GetCachedWidget();
|
|
if ( Widget.IsValid() )
|
|
{
|
|
MyCanvas->RemoveSlot(Widget.ToSharedRef());
|
|
}
|
|
}
|
|
}
|
|
|
|
TSharedRef<SWidget> UCanvasPanel::RebuildWidget()
|
|
{
|
|
MyCanvas = SNew(SConstraintCanvas);
|
|
|
|
for ( UPanelSlot* PanelSlot : Slots )
|
|
{
|
|
if ( UCanvasPanelSlot* TypedSlot = Cast<UCanvasPanelSlot>(PanelSlot) )
|
|
{
|
|
TypedSlot->Parent = this;
|
|
TypedSlot->BuildSlot(MyCanvas.ToSharedRef());
|
|
}
|
|
}
|
|
|
|
return MyCanvas.ToSharedRef();
|
|
}
|
|
|
|
UCanvasPanelSlot* UCanvasPanel::AddChildToCanvas(UWidget* Content)
|
|
{
|
|
return Cast<UCanvasPanelSlot>( Super::AddChild(Content) );
|
|
}
|
|
|
|
TSharedPtr<SConstraintCanvas> UCanvasPanel::GetCanvasWidget() const
|
|
{
|
|
return MyCanvas;
|
|
}
|
|
|
|
bool UCanvasPanel::GetGeometryForSlot(int32 SlotIndex, FGeometry& ArrangedGeometry) const
|
|
{
|
|
UCanvasPanelSlot* PanelSlot = CastChecked<UCanvasPanelSlot>(Slots[SlotIndex]);
|
|
return GetGeometryForSlot(PanelSlot, ArrangedGeometry);
|
|
}
|
|
|
|
bool UCanvasPanel::GetGeometryForSlot(UCanvasPanelSlot* InSlot, FGeometry& ArrangedGeometry) const
|
|
{
|
|
if ( InSlot->Content == nullptr )
|
|
{
|
|
return false;
|
|
}
|
|
|
|
TSharedPtr<SConstraintCanvas> Canvas = GetCanvasWidget();
|
|
if ( Canvas.IsValid() )
|
|
{
|
|
FArrangedChildren ArrangedChildren(EVisibility::All);
|
|
Canvas->ArrangeChildren(Canvas->GetCachedGeometry(), ArrangedChildren);
|
|
|
|
for ( int32 ChildIndex = 0; ChildIndex < ArrangedChildren.Num(); ChildIndex++ )
|
|
{
|
|
if ( ArrangedChildren[ChildIndex].Widget == InSlot->Content->GetCachedWidget() )
|
|
{
|
|
ArrangedGeometry = ArrangedChildren[ChildIndex].Geometry;
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
#if WITH_EDITOR
|
|
|
|
const FText UCanvasPanel::GetPaletteCategory()
|
|
{
|
|
return LOCTEXT("Panel", "Panel");
|
|
}
|
|
|
|
#endif
|
|
|
|
/////////////////////////////////////////////////////
|
|
|
|
#undef LOCTEXT_NAMESPACE
|
|
|