InkPicture.StrokesDeleting Event
Occurs before Stroke objects are deleted from the InkPicture control's Ink property.
Namespace: Microsoft.Ink
Assembly: Microsoft.Ink (in Microsoft.Ink.dll)
Syntax
'Declaration
Public Event StrokesDeleting As InkOverlayStrokesDeletingEventHandler
'Usage
Dim instance As InkPicture
Dim handler As InkOverlayStrokesDeletingEventHandler
AddHandler instance.StrokesDeleting, handler
public event InkOverlayStrokesDeletingEventHandler StrokesDeleting
public:
event InkOverlayStrokesDeletingEventHandler^ StrokesDeleting {
void add (InkOverlayStrokesDeletingEventHandler^ value);
void remove (InkOverlayStrokesDeletingEventHandler^ value);
}
JScript does not support events.
Remarks
The event handler receives an argument of type InkOverlayStrokesDeletingEventArgs that contains data about this event.
When you create an InkOverlayStrokesDeletingEventHandler delegate, you identify the method that handles the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For performance reasons, the default event interest is off but is turned on automatically if you add an event handler.
Examples
This example demonstrates how you can subscribe to the StrokesDeleting event to enable you to restore the last deleted stroke.
When the StrokesDeleting event fires, the Stroke objects that are about to be deleted are saved.
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());
}
In response to a user action such as clicking on a MenuItem, the Stroke objects that were previously deleted are added back to the original Ink object.
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();
}
Platforms
Windows 7, Windows Vista, Windows Server 2008 R2, Windows Server 2008
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Version Information
.NET Framework
Supported in: 3.0