InkOverlayStrokesDeletingEventHandler 委派

表示處理 InkOverlay 物件之 StrokesDeleting 事件的方法。

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

語法

'宣告
Public Delegate Sub InkOverlayStrokesDeletingEventHandler ( _
    sender As Object, _
    e As InkOverlayStrokesDeletingEventArgs _
)
'用途
Dim instance As New InkOverlayStrokesDeletingEventHandler(AddressOf HandlerMethod)

public delegate void InkOverlayStrokesDeletingEventHandler(
    Object sender,
    InkOverlayStrokesDeletingEventArgs e
)

public delegate void InkOverlayStrokesDeletingEventHandler(
    Object^ sender, 
    InkOverlayStrokesDeletingEventArgs^ e
)

/** @delegate */
public delegate void InkOverlayStrokesDeletingEventHandler(
    Object sender,
    InkOverlayStrokesDeletingEventArgs e
)

JScript 不支援委派。

參數

• sender
  型別：System.Object
  這個事件的來源 InkOverlay 物件。

• e
  型別：Microsoft.Ink.InkOverlayStrokesDeletingEventArgs
  包含事件資料的 InkOverlayStrokesDeletingEventArgs 物件。

備註

StrokesDeleting 事件發生於從 InkOverlay.Ink 屬性刪除 Stroke 物件之前。

在建立 InkOverlayStrokesDeletingEventHandler 委派 (Delegate) 時，您會識別處理事件的方法。若要使事件與您的事件處理常式產生關聯，請將委派的執行個體 (Instance) 加入至事件。除非您移除委派，否則每當事件發生時就會呼叫事件處理常式。基於效能考量，相關事件的預設是關閉的，但會在您加入事件處理常式時自動在「Managed 程式碼」中開啟。

範例

這個範例會示範如何訂閱 StrokesDeleting 事件，讓您還原最後刪除的筆劃。

當 StrokesDeleting 事件引發時，會儲存即將刪除的 Stroke 物件。

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());
}

為回應使用者動作，例如按一下 MenuItem (英文)，先前已刪除的 Stroke 物件會重新加入至原始的 Ink 物件。

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();
}

平台

Windows Vista

.NET Framework 和 .NET Compact Framework 並不支援各種平台的所有版本。如需支援平台版本的相關資訊，請參閱 .NET Framework 系統需求。

版本資訊

.NET Framework

支援版本：3.0

請參閱

參考

Microsoft.Ink 命名空間

InkOverlay.Ink