DrawingAttributes Class
Specifies the appearance of a Stroke
Assembly: PresentationCore (in PresentationCore.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
Use the DrawingAttributes property to specify settings such as color, width, transparency, and the shape of the stylus tip for a Stroke.
Use the DefaultDrawingAttributes property to specify the drawing attributes for the strokes added to an InkCanvas. Only strokes that are added after the DefaultDrawingAttributes undergo change show the updated attributes. The appearance of the strokes that are already on the InkCanvas does not change.
For a list of initial property values for an instance of the DrawingAttributes class, see the DrawingAttributes constructor.
The following example demonstrates how to use two DrawingAttributes objects to simulate using a pen and a highlighter on the same InkCanvas. The example assumes the root element in the XAML file is a DockPanel called root. It also assumes that there is a Button called switchHighlighter and that the Click event is connected to the event handler defined in this example.
Private WithEvents inkCanvas1 As New InkCanvas() Private inkDA As DrawingAttributes Private highlighterDA As DrawingAttributes Private useHighlighter As Boolean = False ' Add an InkCanvas to the window, and allow the user to ' switch between using a green pen and a purple highlighter ' on the InkCanvas. Private Sub WindowLoaded(ByVal sender As Object, ByVal e As RoutedEventArgs) inkCanvas1.Background = Brushes.DarkSlateBlue inkCanvas1.DefaultDrawingAttributes.Color = Colors.SpringGreen ' Add the InkCanvas to the DockPanel, named root. root.Children.Add(inkCanvas1) ' Set up the DrawingAttributes for the pen. inkDA = New DrawingAttributes() With inkDA .Color = Colors.SpringGreen .Height = 5 .Width = 5 .FitToCurve = True End With ' Set up the DrawingAttributes for the highlighter. highlighterDA = New DrawingAttributes() With highlighterDA .Color = Colors.Orchid .IsHighlighter = True .IgnorePressure = True .StylusTip = StylusTip.Rectangle .Height = 30 .Width = 10 End With inkCanvas1.DefaultDrawingAttributes = inkDA End Sub 'WindowLoaded ' Create a button called switchHighlighter and use ' SwitchHighlighter_Click to handle the Click event. ' The useHighlighter variable is a boolean that indicates ' whether the InkCanvas renders ink as a highlighter. ' Switch between using the 'pen' DrawingAttributes and the ' 'highlighter' DrawingAttributes when the user clicks on . Private Sub SwitchHighlighter_Click(ByVal sender As [Object], ByVal e As RoutedEventArgs) useHighlighter = Not useHighlighter If useHighlighter Then switchHighlighter.Content = "Use Pen" inkCanvas1.DefaultDrawingAttributes = highlighterDA Else switchHighlighter.Content = "Use Highlighter" inkCanvas1.DefaultDrawingAttributes = inkDA End If End Sub 'SwitchHighlighter_Click
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.