C++ TAttribute::IsBound方法代码示例

TSharedRef<SToolTip> FUICommandInfo::MakeTooltip( const TAttribute<FText>& InText, const TAttribute< EVisibility >& InToolTipVisibility ) const
{
	return 
		SNew(SToolTip)
		.Visibility(InToolTipVisibility.IsBound() ? InToolTipVisibility : EVisibility::Visible)
		.Content()
		[
			SNew(SVerticalBox)
			+SVerticalBox::Slot()
			.Padding(0.0f, 0.0f, 0.0f, 4.0f)
			[
				SNew(STextBlock)
				.Text(InText.IsBound() ? InText : GetDescription())
				.Font(FCoreStyle::Get().GetFontStyle( "ToolTip.Font" ))
				.ColorAndOpacity( FSlateColor::UseForeground() )
			]
			+SVerticalBox::Slot()
			[
				SNew(STextBlock)
				.Text(GetInputText())
				.Font(FCoreStyle::Get().GetFontStyle( "ToolTip.Font" ))
				.ColorAndOpacity( FSlateColor::UseSubduedForeground() )
			]
		];
}

	/** Sets the text and delegate for the hyperlink */
	virtual void SetHyperlink( const FSimpleDelegate& InHyperlink, const TAttribute< FText >& InHyperlinkText = TAttribute< FText >() ) override
	{
		Hyperlink = InHyperlink;

		// Only replace the text if specified
		if ( InHyperlinkText.IsBound() )
		{
			HyperlinkText = InHyperlinkText;
		}
	}

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()
		];
}

void SMessageLogMessageListRow::CreateMessage(const TSharedRef<SHorizontalBox>& InHorzBox, const TSharedRef<IMessageToken>& InMessageToken, float Padding)
{
	TSharedPtr<SWidget> RowContent;
	FName IconBrushName;

	TAttribute<EVisibility> TokenContentVisbility;
	
	switch (InMessageToken->GetType())
	{
	case EMessageToken::Image:
	{
		const TSharedRef<FImageToken> ImageToken = StaticCastSharedRef<FImageToken>(InMessageToken);

		if (ImageToken->GetImageName() != NAME_None)
		{
			if (InMessageToken->GetOnMessageTokenActivated().IsBound())
			{
				RowContent = SNew(SButton)
					.OnClicked(this, &SMessageLogMessageListRow::HandleTokenButtonClicked, InMessageToken)
					.Content()
					[
						SNew(SImage)
						.Image(FEditorStyle::GetBrush(ImageToken->GetImageName()))
					];
			}
			else
			{
				RowContent = SNew(SImage)
					.Image(FEditorStyle::GetBrush(ImageToken->GetImageName()));
			}
		}
	}
		break;

	case EMessageToken::Object:
	{
		const TSharedRef<FUObjectToken> UObjectToken = StaticCastSharedRef<FUObjectToken>(InMessageToken);

		IconBrushName = FName("PropertyWindow.Button_Browse");

		UObject* Object = nullptr;

		// Due to blueprint reconstruction, we can't directly use the Object as it will get trashed during the blueprint reconstruction and the message token will no longer point to the right UObject.
		// Instead we will retrieve the object from the name which should always be good.
		if (UObjectToken->GetObject().IsValid())
		{
			if (!UObjectToken->ToText().ToString().Equals(UObjectToken->GetObject().Get()->GetName()))
			{
				Object = FindObject<UObject>(nullptr, *UObjectToken->GetOriginalObjectPathName());
			}
			else
			{
				Object = const_cast<UObject*>(UObjectToken->GetObject().Get());
			}
		}
		else
		{
			// We have no object (probably because is now stale), try finding the original object linked to this message token to see if it still exist
			Object = FindObject<UObject>(nullptr, *UObjectToken->GetOriginalObjectPathName());
		}

		RowContent = CreateHyperlink(InMessageToken, FUObjectToken::DefaultOnGetObjectDisplayName().IsBound()
			? FUObjectToken::DefaultOnGetObjectDisplayName().Execute(Object, true)
			: UObjectToken->ToText());
	}
		break;

	case EMessageToken::URL:
	{
		const TSharedRef<FURLToken> URLToken = StaticCastSharedRef<FURLToken>(InMessageToken);

		IconBrushName = FName("MessageLog.Url");
		RowContent = CreateHyperlink(InMessageToken, FText::FromString(URLToken->GetURL()));
	}
		break;
	case EMessageToken::EdGraph:
	{
		IconBrushName = FName("PropertyWindow.Button_Browse");
		RowContent = CreateHyperlink(InMessageToken, InMessageToken->ToText());
	}
	break;
	case EMessageToken::Action:
	{
		const TSharedRef<FActionToken> ActionToken = StaticCastSharedRef<FActionToken>(InMessageToken);

		IconBrushName = FName("MessageLog.Action");
		RowContent = SNew(SHyperlink)
			.Text(InMessageToken->ToText())
			.ToolTipText(ActionToken->GetActionDescription())
			.TextStyle(FEditorStyle::Get(), "MessageLog")
			.OnNavigate(this, &SMessageLogMessageListRow::HandleActionHyperlinkNavigate, ActionToken);

		TokenContentVisbility = TAttribute<EVisibility>::Create(TAttribute<EVisibility>::FGetter::CreateRaw(this, &SMessageLogMessageListRow::GetActionLinkVisibility, ActionToken));
	}
		break;

	case EMessageToken::AssetName:
	{
		const TSharedRef<FAssetNameToken> AssetNameToken = StaticCastSharedRef<FAssetNameToken>(InMessageToken);

//.........这里部分代码省略.........