InkPicture.SelectionChanging Event

Artículo
12/12/2007

Occurs when the selection of ink within the InkPicture control is about to change, such as through alterations to the user interface, cut-and-paste procedures, or the Selection property.

Namespace: Microsoft.Ink
Assembly: Microsoft.Ink (in microsoft.ink.dll)

Syntax

'Declaration
Public Event SelectionChanging As InkOverlaySelectionChangingEventHandler
'Usage
Dim instance As InkPicture
Dim handler As InkOverlaySelectionChangingEventHandler

AddHandler instance.SelectionChanging, handler

public event InkOverlaySelectionChangingEventHandler SelectionChanging

public:
event InkOverlaySelectionChangingEventHandler^ SelectionChanging {
    void add (InkOverlaySelectionChangingEventHandler^ value);
    void remove (InkOverlaySelectionChangingEventHandler^ value);
}

/** @event */
public void add_SelectionChanging (InkOverlaySelectionChangingEventHandler value)

/** @event */
public void remove_SelectionChanging (InkOverlaySelectionChangingEventHandler value)

In JScript, you can handle the events defined by a class, but you cannot define your own.

Not applicable.

Remarks

The event handler receives an argument of type InkOverlaySelectionChangingEventArgs that contains data about this event.

When you create an InkOverlaySelectionChangingEventHandler 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.

Example

This C# example adds a SelectionChanging event hander to an InkPicture control, theInkPicture. Before the selection actually occurs, the colors of the selected Stroke objects are turned red. Note that this permanently turns the selected strokes red.

[C#]

using Microsoft.Ink;
//...
  theInkPicture.SelectionChanging += new InkOverlaySelectionChangingEventHandler(theInkPicture_SelectionChanging);
//...
  private void theInkPicture_SelectionChanging(object sender, InkOverlaySelectionChangingEventArgs e)
  {
     foreach (Stroke selectedStroke in e.NewSelection)
     {
         selectedStroke.DrawingAttributes.Color = Color.Red;
     }
  }
//...

This Microsoft® Visual Basic® .NET example adds a SelectionChanging event hander to an InkPicture control, theInkPicture. Before the selection actually occurs, the colors of the selected Stroke objects are turned red. Note that this permanently turns the selected strokes red.

[Visual Basic]

Imports Microsoft.Ink
'...
    Private WithEvents theInkPicture As InkPicture
'...
    Private Sub theInkPicture_SelectionChanging(ByVal sender As Object, _
        ByVal e As Microsoft.Ink.InkOverlaySelectionChangingEventArgs) _
    Handles theInkPicture.SelectionChanging
        Dim selectedStroke As Stroke
        For Each selectedStroke In e.NewSelection
            selectedStroke.DrawingAttributes.Color = Color.Red
        Next
    End Sub
'...

Platforms

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

Version Information

.NET Framework

Supported in: 3.0

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