InkCollector.MouseWheel - событие

Статья
11/04/2008

Обновлен: Ноябрь 2007

Occurs when a user moves the mouse wheel while the InkCollector object has focus.

Пространство имен: Microsoft.Ink
Сборка: Microsoft.Ink (в Microsoft.Ink.dll)

Синтаксис

'Декларация
Public Event MouseWheel As InkCollectorMouseWheelEventHandler
'Применение
Dim instance As InkCollector
Dim handler As InkCollectorMouseWheelEventHandler

AddHandler instance.MouseWheel, handler

public event InkCollectorMouseWheelEventHandler MouseWheel

public:
 event InkCollectorMouseWheelEventHandler^ MouseWheel {
    void add (InkCollectorMouseWheelEventHandler^ value);
    void remove (InkCollectorMouseWheelEventHandler^ value);
}

/** @event */
public void add_MouseWheel (InkCollectorMouseWheelEventHandler value)
/** @event */
public void remove_MouseWheel (InkCollectorMouseWheelEventHandler value)

JScript не поддерживает события.

Заметки

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

When you create an 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.

Примечание.
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.

Примеры

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();
        }
    }
}

Платформы

Windows Vista

Среды .NET Framework и .NET Compact Framework поддерживают не все версии каждой платформы. Поддерживаемые версии перечислены в разделе Требования к системе для .NET Framework.