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78 lines
1.5 KiB
C++
78 lines
1.5 KiB
C++
// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.
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#include "SlotBase.h"
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#include "Widgets/SWidget.h"
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#include "Widgets/SNullWidget.h"
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FSlotBase::FSlotBase()
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: RawParentPtr(nullptr)
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, Widget( SNullWidget::NullWidget )
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{
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}
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FSlotBase::FSlotBase( const TSharedRef<SWidget>& InWidget )
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: RawParentPtr(nullptr)
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, Widget( InWidget )
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{
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}
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const TSharedPtr<SWidget> FSlotBase::DetachWidget()
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{
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if (Widget != SNullWidget::NullWidget)
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{
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#if SLATE_PARENT_POINTERS
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Widget->ConditionallyDetatchParentWidget(RawParentPtr);
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#endif
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// Invalidate Prepass?
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const TSharedRef<SWidget> MyExWidget = Widget;
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Widget = SNullWidget::NullWidget;
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return MyExWidget;
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}
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else
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{
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// Nothing to detach!
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return TSharedPtr<SWidget>();
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}
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}
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void FSlotBase::DetatchParentFromContent()
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{
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#if SLATE_PARENT_POINTERS
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if (Widget != SNullWidget::NullWidget)
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{
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Widget->ConditionallyDetatchParentWidget(RawParentPtr);
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}
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#endif
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}
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void FSlotBase::AfterContentOrOwnerAssigned()
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{
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if (GSlateLayoutCaching && RawParentPtr)
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{
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RawParentPtr->InvalidatePrepass();
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}
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#if SLATE_PARENT_POINTERS
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if (RawParentPtr)
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{
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if (Widget != SNullWidget::NullWidget)
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{
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// TODO NDarnell I want to enable this, but too many places in the codebase
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// have made assumptions about being able to freely reparent widgets, while they're
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// still connected to an existing hierarchy.
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//ensure(!Widget->IsParentValid());
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Widget->AssignParentWidget(RawParentPtr->AsShared());
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}
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}
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#endif
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}
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FSlotBase::~FSlotBase()
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{
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DetatchParentFromContent();
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}
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