InkOverlay.MouseWheel Event
Occurs when a user moves the mouse wheel while the InkOverlay object has focus.
Namespace: Microsoft.Ink
Assembly: Microsoft.Ink (in Microsoft.Ink.dll)
Syntax
'Declaration
Public Event MouseWheel As InkCollectorMouseWheelEventHandler
'Usage
Dim instance As InkOverlay
Dim handler As InkCollectorMouseWheelEventHandler
AddHandler instance.MouseWheel, handler
public event InkCollectorMouseWheelEventHandler MouseWheel
public:
event InkCollectorMouseWheelEventHandler^ MouseWheel {
void add (InkCollectorMouseWheelEventHandler^ value);
void remove (InkCollectorMouseWheelEventHandler^ value);
}
JScript does not support events.
Remarks
The event handler receives an argument of type CancelMouseEventArgs containing data about this event.
When you create a InkCollectorMouseDownEventHandler 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.
To improve real-time ink performance, hide the mouse cursor while inking. To do so, hide the mouse cursor in the MouseDown event handler, and show the mouse cursor in the MouseUp event handler.
Note
The CancelMouseEventArgs object's X and Y properties are in pixels and not the HIMETRIC units that are associated with the ink space. This is because this event replaces the related mouse event of an application that is not pen-aware, and that type of application is depicted in pixels.
Examples
In this example, when the MouseWheel event fires, all strokes are scrolled according to the mouse wheel rotation amount and direction.
Private Sub mInkObject_MouseWheel(ByVal sender As Object, ByVal e As CancelMouseEventArgs)
Using S As Strokes = mInkObject.Ink.Strokes
If (S.Count > 0) Then
S.Move(0, e.Delta)
panelInkCanvas.Invalidate()
End If
End Using
End Sub
private void mInkObject_MouseWheel(object sender, CancelMouseEventArgs e)
{
using (Strokes S = mInkObject.Ink.Strokes)
{
if (S.Count > 0)
{
S.Move(0, e.Delta);
panelInkCanvas.Invalidate();
}
}
}
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