InkCanvas.SelectionChanging 事件

  • 参考

定义

命名空间:
System.Windows.Controls
程序集:
PresentationFramework.dll

在选择了一组新墨迹笔画和/或元素时发生。

public:
 event System::Windows::Controls::InkCanvasSelectionChangingEventHandler ^ SelectionChanging;
public event System.Windows.Controls.InkCanvasSelectionChangingEventHandler SelectionChanging;
member this.SelectionChanging : System.Windows.Controls.InkCanvasSelectionChangingEventHandler 
Public Custom Event SelectionChanging As InkCanvasSelectionChangingEventHandler 
Public Event SelectionChanging As InkCanvasSelectionChangingEventHandler

事件类型

InkCanvasSelectionChangingEventHandler

示例

以下示例使所选笔划成为蓝色。

void inkCanvas1_SelectionChanging(object sender, InkCanvasSelectionChangingEventArgs e)
{
    StrokeCollection selectedStrokes = e.GetSelectedStrokes();
    
    foreach (Stroke aStroke in inkCanvas1.Strokes)
    {
        if (selectedStrokes.Contains(aStroke))
        {
            aStroke.DrawingAttributes.Color = Colors.RoyalBlue;
        }
        else
        {
            aStroke.DrawingAttributes.Color = inkCanvas1.DefaultDrawingAttributes.Color;
        }
    }
}

Private Sub inkCanvas1_SelectionChanging(ByVal sender As Object, _
                                 ByVal e As InkCanvasSelectionChangingEventArgs)

    Dim selectedStrokes As StrokeCollection = e.GetSelectedStrokes()

    Dim aStroke As Stroke
    For Each aStroke In inkCanvas1.Strokes
        If selectedStrokes.Contains(aStroke) Then
            aStroke.DrawingAttributes.Color = Colors.RoyalBlue
        Else
            aStroke.DrawingAttributes.Color = inkCanvas1.DefaultDrawingAttributes.Color
        End If
    Next aStroke

End Sub

注解

当用户 SelectionChanging 选择笔划和/或元素时，但在应用更改之前，将引发该事件。

接收 SelectionChanging 对象时InkCanvasSelectionChangingEventHandlerInkCanvasSelectionChangingEventArgs，将处理 事件。 InkCanvasSelectionChangingEventArgs 提供在用户选择和 对象后用于访问 FrameworkElement 和 StrokeCollection 对象的方法。

应用更改后，将 SelectionChanged 引发 事件。

注意

删除 SelectionChanging 所选笔划或更改属性时 ActiveEditingMode ，不会发生该事件。

适用于

另请参阅