InkCanvas.SelectionChanging 事件

  • 參考

定義

命名空間:
System.Windows.Controls
組件:
PresentationFramework.dll

選取一組新的筆墨筆劃及/或項目之後，就會發生。

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

事件類型

InkCanvasSelectionChangingEventHandler

範例

下列範例會讓選取的筆劃變成藍色。

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

備註

SelectionChanging當使用者選取筆劃和/或元素時，會在套用變更之前引發事件。

當 收到 InkCanvasSelectionChangingEventArgs 物件時 InkCanvasSelectionChangingEventHandler ，就會 SelectionChanging 處理事件。 InkCanvasSelectionChangingEventArgs 提供在使用者選取物件之後存取 FrameworkElement 和 StrokeCollection 物件的方法。

套用變更之後，就會 SelectionChanged 引發 事件。

注意

刪除 SelectionChanging 選取的筆劃或屬性變更時 ActiveEditingMode ，不會發生此事件。

適用於

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