InkOverlayStrokesDeletingEventArgs.StrokesToDelete 属性

项目
10/28/2008

获取激发 StrokesDeleting 事件时删除的 Strokes 集合。

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

语法

声明
Public ReadOnly Property StrokesToDelete As Strokes
用法
Dim instance As InkOverlayStrokesDeletingEventArgs
Dim value As Strokes

value = instance.StrokesToDelete

public Strokes StrokesToDelete { get; }

public:
property Strokes^ StrokesToDelete {
    Strokes^ get ();
}

/** @property */
public Strokes get_StrokesToDelete()

public function get StrokesToDelete () : Strokes

属性值

类型：Microsoft.Ink.Strokes
激发 StrokesDeleting 事件时删除的 Strokes 集合。

示例

此示例演示如何订阅 StrokesDeleting 事件，以使您能够还原最后一个删除的笔画。

激发 StrokesDeleting 事件时，将保存即将删除的 Stroke 对象。

Private Sub mInkObject_StrokesDeleting(ByVal sender As Object, ByVal e As InkOverlayStrokesDeletingEventArgs)
    ' Store strokes for later undo. They must be stored in
    ' a separate Ink object. 
    mInkDeleted = New Ink()
    mInkDeleted.AddStrokesAtRectangle(e.StrokesToDelete, e.StrokesToDelete.GetBoundingBox())
End Sub

private void mInkObject_StrokesDeleting(object sender, InkOverlayStrokesDeletingEventArgs e)
{
    // Store strokes for later undo. They must be stored in
    // a separate Ink object. 
    mInkDeleted = new Ink();
    mInkDeleted.AddStrokesAtRectangle(e.StrokesToDelete, e.StrokesToDelete.GetBoundingBox());
}

为响应用户操作（比如单击 MenuItem），以前删除的 Stroke 对象将添加回原始 Ink 对象。

If Not mInkDeleted Is Nothing Then
    ' Add strokes back.  (You need to use Ink.AddStrokesAtRectangle as opposed
    ' to Strokes.Add because you are dealing with two different Ink objects.)
    mInkObject.Ink.AddStrokesAtRectangle(mInkDeleted.Strokes, mInkDeleted.Strokes.GetBoundingBox())
    mInkDeleted = Nothing
    ' For best performance, you should Invalidate the rectangle created by the 
    ' bounding box (converted from ink space to pixel space).  For simplicity,
    ' we will just refresh the entire control.
    Refresh()
End If

if (mInkDeleted != null)
{
    // Add strokes back.  (You need to use Ink.AddStrokesAtRectangle as opposed
    // to Strokes.Add because you are dealing with two different Ink objects.)
    mInkObject.Ink.AddStrokesAtRectangle(mInkDeleted.Strokes, mInkDeleted.Strokes.GetBoundingBox());
    mInkDeleted = null;
    // For best performance, you should Invalidate the rectangle created by the 
    // bounding box (converted from ink space to pixel space).  For simplicity,
    // we will just refresh the entire control.
    Refresh();
}