InkPicture.StrokesDeleted 事件

發行項
10/29/2008

會在已經從 InkPicture 控制項的 Ink 屬性刪除 Stroke 物件之後發生。

命名空間： Microsoft.Ink
組件： Microsoft.Ink (在 Microsoft.Ink.dll 中)

語法

'宣告
Public Event StrokesDeleted As InkOverlayStrokesDeletedEventHandler
'用途
Dim instance As InkPicture
Dim handler As InkOverlayStrokesDeletedEventHandler

AddHandler instance.StrokesDeleted, handler

public event InkOverlayStrokesDeletedEventHandler StrokesDeleted

public:
 event InkOverlayStrokesDeletedEventHandler^ StrokesDeleted {
    void add (InkOverlayStrokesDeletedEventHandler^ value);
    void remove (InkOverlayStrokesDeletedEventHandler^ value);
}

/** @event */
public void add_StrokesDeleted (InkOverlayStrokesDeletedEventHandler value)
/** @event */
public void remove_StrokesDeleted (InkOverlayStrokesDeletedEventHandler value)

JScript 不支援事件。

備註

事件處理常式會收到 EventArgs (英文) 型別的引數，其中未包含任何資料。

範例

這個範例示範如何訂閱 Stoke() 事件和 StrokesDeleted 事件，修改 InkPicture 控制項的背景色彩。

當 Stoke() 事件引發時，會檢查 EditingMode 屬性。如果目前在筆墨狀態，則控制項的背景色彩會變更為白色。您必須檢查 EditingMode 屬性，因為在清除筆劃時也會引發 Stoke() 事件。

Private Sub mInkPicture_Stroke3(ByVal sender As Object, ByVal e As InkCollectorStrokeEventArgs)
    ' If you are in inking mode, change background to white.
    ' (This event will also fire in Delete mode because the movement made by
    ' the eraser is considered a stroke.)
    If (InkOverlayEditingMode.Ink = mInkPicture.EditingMode) Then
        mInkPicture.BackColor = Color.White
    End If
End Sub

private void mInkPicture_Stroke3(object sender, InkCollectorStrokeEventArgs e)
{
    // If you are in inking mode, change background to white.
    // (This event will also fire in Delete mode because the movement made by
    // the eraser is considered a stroke.)
    if (InkOverlayEditingMode.Ink == mInkPicture.EditingMode)
    {
        mInkPicture.BackColor = Color.White;
    }
}

當 StrokesDeleted 事件引發時，會檢查 Stokes() 集合。如果集合中沒有 Stroke 物件 (或者只留下橡皮擦的筆劃)，則控制項的背景色彩會變更為灰色。

Private Sub mInkPicture_StrokesDeleted(ByVal sender As Object, ByVal e As EventArgs)
    ' Change the background to gray if there are no strokes.
    ' If the last stroke was deleted by an eraser, there will be one transparent 
    ' stroke, which is the stroke made by the eraser itself.
    If (mInkPicture.Ink.Strokes.Count = 0 Or _
       (mInkPicture.Ink.Strokes.Count = 1 And _
        mInkPicture.Ink.Strokes(0).DrawingAttributes.Transparency = 255)) Then

        mInkPicture.BackColor = Color.Gray

    End If
End Sub

private void mInkPicture_StrokesDeleted(object sender, EventArgs e)
{
    // Change the background to gray if there are no strokes.
    // If the last stroke was deleted by an eraser, there will be one transparent 
    // stroke, which is the stroke made by the eraser itself.
    if (mInkPicture.Ink.Strokes.Count == 0 ||
       (mInkPicture.Ink.Strokes.Count == 1 &&
        mInkPicture.Ink.Strokes[0].DrawingAttributes.Transparency == 255))
    {
        mInkPicture.BackColor = Color.Gray;
    }

}