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51e6fe68ae
#jira UE-109145 #rb daren.cheng #preflight 60a27ad607285b0001d61dfd [CL 16351434 by Patrick Boutot in ue5-main branch]
112 lines
2.3 KiB
C++
112 lines
2.3 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "SlotBase.h"
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#include "Layout/Children.h"
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#include "Widgets/SWidget.h"
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#include "Widgets/SNullWidget.h"
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PRAGMA_DISABLE_DEPRECATION_WARNINGS
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FSlotBase::FSlotBase()
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: Owner(nullptr)
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, Widget(SNullWidget::NullWidget)
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#if WITH_EDITORONLY_DATA
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, RawParentPtr(nullptr)
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#endif
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{
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}
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FSlotBase::FSlotBase(const FChildren& Children)
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: Owner(&Children)
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, Widget(SNullWidget::NullWidget)
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#if WITH_EDITORONLY_DATA
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, RawParentPtr(nullptr)
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#endif
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{
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}
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FSlotBase::FSlotBase( const TSharedRef<SWidget>& InWidget )
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: Owner(nullptr)
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, Widget(InWidget)
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#if WITH_EDITORONLY_DATA
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, RawParentPtr(nullptr)
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#endif
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{
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}
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PRAGMA_ENABLE_DEPRECATION_WARNINGS
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SWidget* FSlotBase::GetOwnerWidget() const
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{
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return GetOwner() ? &(GetOwner()->GetOwner()) : nullptr;
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}
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void FSlotBase::SetOwner(const FChildren& InChildren)
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{
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if (Owner != &InChildren)
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{
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if (ensureMsgf(Owner == nullptr, TEXT("Slots should not be reassigned to different parents.")))
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{
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Owner = &InChildren;
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AfterContentOrOwnerAssigned();
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}
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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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Widget->ConditionallyDetatchParentWidget(GetOwnerWidget());
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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::Invalidate(EInvalidateWidgetReason InvalidateReason)
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{
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// If a slot invalidates it needs to invalidate the parent of widget of its content.
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if (SWidget* OwnerWidget = GetOwnerWidget())
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{
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OwnerWidget->Invalidate(InvalidateReason);
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}
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}
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void FSlotBase::DetatchParentFromContent()
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{
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if (Widget != SNullWidget::NullWidget)
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{
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Widget->ConditionallyDetatchParentWidget(GetOwnerWidget());
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}
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}
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void FSlotBase::AfterContentOrOwnerAssigned()
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{
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if (SWidget* OwnerWidget = GetOwnerWidget())
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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(OwnerWidget->AsShared());
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}
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}
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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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