InkOverlay.StrokesDeleted 事件

项目
11/04/2008

在从 InkOverlay.Ink 属性中删除一个或多个 Stroke 对象之后发生。

命名空间： Microsoft.Ink
程序集： Microsoft.Ink（在 Microsoft.Ink.dll 中）

语法

声明
Public Event StrokesDeleted As InkOverlayStrokesDeletedEventHandler
用法
Dim instance As InkOverlay
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 不支持事件。

备注

在对附加到 InkOverlay 对象的墨迹调用 Ink.DeleteStroke 或 Ink.DeleteStrokes 方法时激发此事件。

事件处理程序接收 EventArgs 类型的参数，该参数不包含任何数据。

示例

此示例演示如何订阅 Stoke() 和 StrokesDeleted 事件来修改墨迹呈现的控件的背景色。

当激发 Stoke() 事件时，将检查 EditingMode 属性。如果当前处于墨迹模式，则控件的背景色更改为白色。必须检查 EditingMode 属性，因为擦除笔画时也会激发 Stoke() 事件。

Private Sub mInkObject_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 = mInkObject.EditingMode) Then
        mInkObject.AttachedControl.BackColor = Color.White
    End If
End Sub

private void mInkObject_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 == mInkObject.EditingMode)
    {
        mInkObject.AttachedControl.BackColor = Color.White;
    }

}

当激发 StrokesDeleted 事件时，将检查 Stokes() 集合。如果该集合中不存在 Stroke 对象（或只剩下橡皮擦的笔画），则控件的背景色更改为灰色。

Private Sub mInkObject_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 (mInkObject.Ink.Strokes.Count = 0 Or _
       (mInkObject.Ink.Strokes.Count = 1 And _
        mInkObject.Ink.Strokes(0).DrawingAttributes.Transparency = 255)) Then

        mInkObject.AttachedControl.BackColor = Color.Gray

    End If
End Sub

private void mInkObject_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 (mInkObject.Ink.Strokes.Count == 0 ||
       (mInkObject.Ink.Strokes.Count == 1 &&
        mInkObject.Ink.Strokes[0].DrawingAttributes.Transparency == 255))
    {
        mInkObject.AttachedControl.BackColor = Color.Gray;
    }

}