InkCollectorCursorButtonUpEventHandler Delegate

Artikel
10/19/2012

Represents the method that handles the CursorButtonUp event of an InkCollector object.

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

Syntax

'Declaration
Public Delegate Sub InkCollectorCursorButtonUpEventHandler ( _
    sender As Object, _
    e As InkCollectorCursorButtonUpEventArgs _
)
'Usage
Dim instance As New InkCollectorCursorButtonUpEventHandler(AddressOf HandlerMethod)

public delegate void InkCollectorCursorButtonUpEventHandler(
    Object sender,
    InkCollectorCursorButtonUpEventArgs e
)

public delegate void InkCollectorCursorButtonUpEventHandler(
    Object^ sender, 
    InkCollectorCursorButtonUpEventArgs^ e
)

JScript does not support delegates.

Parameters

sender
Type: System.Object

The source InkCollector object of this event.

e
Type: Microsoft.Ink.InkCollectorCursorButtonUpEventArgs

The InkCollectorCursorButtonUpEventArgs object that contains the event data.

Remarks

A button on a pen tip is up when the user completes a stroke and lifts the pen from the digitizer. A button on a barrel is up when the button is not pressed.

When you create an InkCollectorCursorButtonUpEventHandler 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 in managed code if you add an event handler.

When you release the right mouse button, you receive two CursorButtonUp events—one for right button up and one for left button up.

Examples

The following example shows how you can subscribe to the CursorInRange event, CursorButtonDown event, and the CursorButtonUp event in order to have the ink pointer (when inking with the mouse) be displayed using a different color than the ink itself.

When the CursorInRange event fires, a check is made to see if this is the first time that the InkCollector object has come in contact with this particular Cursor object. If so, the DrawingAttributes property is assigned with a clone of the DefaultDrawingAttributes property. This ensures that subsequent access to the DrawingAttributes property does not throw a null reference exception. If the mouse is being used, the ink color is set to red.

Private Sub mInkObject_CursorInRange(ByVal sender As Object, ByVal e As InkCollectorCursorInRangeEventArgs)
    Const MOUSE_CURSOR_ID As Integer = 1
    If e.NewCursor Then 
        ' mInkObject can be InkCollector, InkOverlay, or InkPicture
        e.Cursor.DrawingAttributes = mInkObject.DefaultDrawingAttributes.Clone()
        ' if this cursor is the mouse, we'll set color to red 
        If (MOUSE_CURSOR_ID = e.Cursor.Id) Then
            e.Cursor.DrawingAttributes.Color = Color.Red
        End If 

    End If 
End Sub

private void mInkObject_CursorInRange(object sender, InkCollectorCursorInRangeEventArgs e)
{
    const int MOUSE_CURSOR_ID = 1;

    if (e.NewCursor)
    {
        // mInkObject can be InkCollector, InkOverlay, or InkPicture
        e.Cursor.DrawingAttributes = mInkObject.DefaultDrawingAttributes.Clone();
        // if this cursor is the mouse, we'll set color to red 
        if (MOUSE_CURSOR_ID == e.Cursor.Id)
        {
            e.Cursor.DrawingAttributes.Color = Color.Red;
        }
    }
}

When the CursorButtonDown event fires, a check is made to see if the Cursor object supplied to the event is the mouse. If so, the Color property is to set to blue.

Private Sub mInkObject_CursorButtonDown(ByVal sender As Object, ByVal e As InkCollectorCursorButtonDownEventArgs)
    Const MOUSE_CURSOR_ID As Integer = 1
    If (MOUSE_CURSOR_ID = e.Cursor.Id) Then
        e.Cursor.DrawingAttributes.Color = Color.Blue
    End If 
End Sub

private void mInkObject_CursorButtonDown(object sender, InkCollectorCursorButtonDownEventArgs e)
{
    const int MOUSE_CURSOR_ID = 1;

    if (MOUSE_CURSOR_ID == e.Cursor.Id)
    {
        e.Cursor.DrawingAttributes.Color = Color.Blue;
    }

}

When the CursorButtonUp event fires, a check is made to see if the Cursor object supplied to the event is the mouse. If so, the Color property is to set back to red.

Private Sub mInkObject_CursorButtonUp(ByVal sender As Object, ByVal e As InkCollectorCursorButtonUpEventArgs)
    Const MOUSE_CURSOR_ID As Integer = 1
    If (MOUSE_CURSOR_ID = e.Cursor.Id) Then
        e.Cursor.DrawingAttributes.Color = Color.Red
    End If 
End Sub

private void mInkObject_CursorButtonUp(object sender, InkCollectorCursorButtonUpEventArgs e)
{
    const int MOUSE_CURSOR_ID = 1;

    if (MOUSE_CURSOR_ID == e.Cursor.Id)
    {
        e.Cursor.DrawingAttributes.Color = Color.Red;
    }
}

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

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