Change ToolTip ShowDuration
Environment
| Product Version | 2022.1.117 |
| Product | RadSyntaxEditor for WPF |
Description
How to create a custom UILayer to customize the way that tooltips are shown such as extending their ShowDuration.
Solution
1. Implement a custom tooltip tagger as explained in the Custom Tagger article.
2. Implement a custom UILayer that derives from TextToolTipUILayer. In the GetLinePartUIElement method, you can get the Rectangle created by default and set the ToolTipService.ShowDuration attached property.
Creating a custom TextToolTipUILayer
public class CustomTextToolTipUILayer : TextToolTipUILayer
{
protected override FrameworkElement GetLinePartUIElement(ToolTipTag tag, Span span, UIUpdateContext updateContext)
{
var rectangle = (Rectangle)base.GetLinePartUIElement(tag, span, updateContext);
ToolTipService.SetShowDuration(rectangle, int.MaxValue);
return rectangle;
}
}3. To apply the custom UILayer, create a custom UILayersBuilder and override its BuildUILayers method. In the method, you can replace the default TextToolTipUILayer with the custom one using the Remove and AddAfter methods of the UILayerStack.
Creating a custom UILayersBuilder
public class CustomUILayersBuilder : UILayersBuilder
{
public override void BuildUILayers(UILayerStack uiLayers)
{
base.BuildUILayers(uiLayers);
uiLayers.Remove(PredefinedUILayers.TextToolTip);
uiLayers.AddAfter(PredefinedUILayers.Text, new CustomTextToolTipUILayer());
}
}4. Apply the custom UILayersBuilder using the syntax editor's property with the same name.
Creating a custom UILayersBuilder
this.syntaxEditor.UILayersBuilder = new CustomUILayersBuilder();