C++ TAttribute::Get方法代码示例

		/** Appends the key binding to the end of the provided ToolTip */
		static FText AppendKeyBindingToToolTip( const TAttribute<FText> ToolTip, TWeakPtr< const FUICommandInfo> Command )
		{
			TSharedPtr<const FUICommandInfo> CommandPtr = Command.Pin();

			if( CommandPtr.IsValid() && CommandPtr->GetActiveChord()->IsValidChord() )
			{
				FFormatNamedArguments Args;
				Args.Add( TEXT("ToolTipDescription"), ToolTip.Get() );
				Args.Add( TEXT("Keybinding"), CommandPtr->GetInputText() );
				return FText::Format( NSLOCTEXT("ToolBar", "ToolTip + Keybinding", "{ToolTipDescription} ({Keybinding})"), Args );
			}
			else
			{
				return ToolTip.Get();
			}
		}

void FMenuBuilder::BeginSection( FName InExtensionHook, const TAttribute< FText >& InHeadingText )
{
	check(CurrentSectionExtensionHook == NAME_None && !bSectionNeedsToBeApplied);

	ApplyHook(InExtensionHook, EExtensionHook::Before);
	
	// Do not actually apply the section header, because if this section is ended immediately
	// then nothing ever gets created, preventing empty sections from ever appearing
	bSectionNeedsToBeApplied = true;
	CurrentSectionExtensionHook = InExtensionHook;
	CurrentSectionHeadingText = InHeadingText.Get();

	// Do apply the section beginning if we are in developer "show me all the hooks" mode
	if (FMultiBoxSettings::DisplayMultiboxHooks.Get())
	{
		ApplySectionBeginning();
	}

	ApplyHook(InExtensionHook, EExtensionHook::First);
}

TSharedRef< class SToolTip > FDocumentation::CreateToolTip(const TAttribute<FText>& Text, const TSharedPtr<SWidget>& OverrideContent, const FString& Link, const FString& ExcerptName) const
{
	TSharedPtr< SDocumentationToolTip > DocToolTip;

	if ( !Text.IsBound() && Text.Get().IsEmpty() )
	{
		return SNew( SToolTip );
	}

	if ( OverrideContent.IsValid() )
	{
		SAssignNew( DocToolTip, SDocumentationToolTip )
		.DocumentationLink( Link )
		.ExcerptName( ExcerptName )
		[
			OverrideContent.ToSharedRef()
		];
	}
	else
	{
		SAssignNew( DocToolTip, SDocumentationToolTip )
		.Text( Text )
		.DocumentationLink( Link )
		.ExcerptName( ExcerptName );
	}
	
	return SNew( SToolTip )
		.IsInteractive( DocToolTip.ToSharedRef(), &SDocumentationToolTip::IsInteractive )

		// Emulate text-only tool-tip styling that SToolTip uses when no custom content is supplied.  We want documentation tool-tips to 
		// be styled just like text-only tool-tips
		.BorderImage( FCoreStyle::Get().GetBrush("ToolTip.BrightBackground") )
		.TextMargin(FMargin(11.0f))
		[
			DocToolTip.ToSharedRef()
		];
}

		static FText PassThroughAttribute( TAttribute< FString > InString )
		{
			return FText::FromString( InString.Get( TEXT("") ) );
		}

		static FString GetPIENotifyText(TAttribute<FGraphAppearanceInfo> Appearance, FString DefaultText)
		{
			FString OverrideText = Appearance.Get().PIENotifyText;
			return OverrideText.Len() ? OverrideText : DefaultText;
		}

/**
 * Builds this MultiBlock widget up from the MultiBlock associated with it
 */
void SToolBarButtonBlock::BuildMultiBlockWidget(const ISlateStyle* StyleSet, const FName& StyleName)
{
	struct Local
	{
		/** Appends the key binding to the end of the provided ToolTip */
		static FText AppendKeyBindingToToolTip( const TAttribute<FText> ToolTip, TWeakPtr< const FUICommandInfo> Command )
		{
			TSharedPtr<const FUICommandInfo> CommandPtr = Command.Pin();

			if( CommandPtr.IsValid() && CommandPtr->GetActiveChord()->IsValidChord() )
			{
				FFormatNamedArguments Args;
				Args.Add( TEXT("ToolTipDescription"), ToolTip.Get() );
				Args.Add( TEXT("Keybinding"), CommandPtr->GetInputText() );
				return FText::Format( NSLOCTEXT("ToolBar", "ToolTip + Keybinding", "{ToolTipDescription} ({Keybinding})"), Args );
			}
			else
			{
				return ToolTip.Get();
			}
		}
	};


	TSharedRef< const FMultiBox > MultiBox( OwnerMultiBoxWidget.Pin()->GetMultiBox() );
	
	TSharedRef< const FToolBarButtonBlock > ToolBarButtonBlock = StaticCastSharedRef< const FToolBarButtonBlock >( MultiBlock.ToSharedRef() );

	// Allow the block to override the action's label and tool tip string, if desired
	TAttribute<FText> ActualLabel;
	if (ToolBarButtonBlock->LabelOverride.IsSet())
	{
		ActualLabel = ToolBarButtonBlock->LabelOverride;
	}
	else
	{
		ActualLabel = ToolBarButtonBlock->GetAction()->GetLabel();
	}

	// Add this widget to the search list of the multibox
	if (MultiBlock->GetSearchable())
		OwnerMultiBoxWidget.Pin()->AddSearchElement(this->AsWidget(), ActualLabel.Get());

	TAttribute<FText> ActualToolTip;
	if (ToolBarButtonBlock->ToolTipOverride.IsSet())
	{
		ActualToolTip = ToolBarButtonBlock->ToolTipOverride;
	}
	else
	{
		ActualToolTip = ToolBarButtonBlock->GetAction()->GetDescription();
	}

	// If a key is bound to the command, append it to the tooltip text.
	TWeakPtr<const FUICommandInfo> Action = ToolBarButtonBlock->GetAction();
	ActualToolTip = TAttribute< FText >::Create( TAttribute< FText >::FGetter::CreateStatic( &Local::AppendKeyBindingToToolTip, ActualToolTip, Action ) );
	
	// If we were supplied an image than go ahead and use that, otherwise we use a null widget
	TSharedRef< SWidget > IconWidget =
		SNew( SImage )
		.Visibility( this, &SToolBarButtonBlock::GetIconVisibility, false )	
		.Image( this, &SToolBarButtonBlock::GetIconBrush );
	TSharedRef< SWidget > SmallIconWidget =
		SNew( SImage )
		.Visibility( this, &SToolBarButtonBlock::GetIconVisibility, true )	
		.Image( this, &SToolBarButtonBlock::GetSmallIconBrush );

	// Create the content for our button
	TSharedRef< SWidget > ButtonContent =

		SNew(SHorizontalBox)
		.AddMetaData<FTagMetaData>(FTagMetaData(TutorialHighlightName))

		+ SHorizontalBox::Slot()
		.FillWidth(1)
		.VAlign(VAlign_Center)
		[
			SNew( SVerticalBox )

			// Icon image
			+ SVerticalBox::Slot()
			.AutoHeight()
			.HAlign( HAlign_Center )	// Center the icon horizontally, so that large labels don't stretch out the artwork
			[
				IconWidget
			]
			+ SVerticalBox::Slot().AutoHeight()
			.HAlign( HAlign_Center )
			[
				SmallIconWidget
			]

			// Label text
			+ SVerticalBox::Slot().AutoHeight()
			.HAlign( HAlign_Center )	// Center the label text horizontally
			[
				SNew( STextBlock )
//.........这里部分代码省略.........

void SAssetSearchBox::SetText(const TAttribute< FText >& InNewText)
{
    InputText->SetText(InNewText);
    PreCommittedText = InNewText.Get();
}