MouseButton Enumerazione

Definizione

Definisce i valori che specificano i pulsanti sul dispositivo mouse.Defines values that specify the buttons on a mouse device.

public enum class MouseButton
public enum MouseButton
type MouseButton = 
Public Enum MouseButton
Ereditarietà
MouseButton

Campi

Left 0

Rappresenta il pulsante sinistro del mouse.The left mouse button.

Middle 1

Rappresenta il pulsante centrale del mouse.The middle mouse button.

Right 2

Rappresenta il pulsante destro del mouse.The right mouse button.

XButton1 3

Primo pulsante esteso del mouse.The first extended mouse button.

XButton2 4

Secondo pulsante esteso del mouse.The second extended mouse button.

Esempi

Nell'esempio seguente viene creato MouseDown un gestore eventi che utilizza MouseButton l'enumerazione per determinare quale pulsante è stato premuto.The following example creates a MouseDown event handler that uses the MouseButton enumeration to determine which button was pressed. A seconda del pulsante premuto, viene modificato lo sfondo del controllo che ha generato l'evento.Depending on which button was pressed, the background of the control that fired the event is changed.

private void MouseButtonDownHandler(object sender, MouseButtonEventArgs e)
{
    Control src = e.Source as Control;

    if (src != null)
    {
        switch (e.ChangedButton)
        {
            case MouseButton.Left:
                src.Background = Brushes.Green;
                break;
            case MouseButton.Middle:
                src.Background = Brushes.Red;
                break;
            case MouseButton.Right:
                src.Background = Brushes.Yellow;
                break;
            case MouseButton.XButton1:
                src.Background = Brushes.Brown;
                break;
            case MouseButton.XButton2:
                src.Background = Brushes.Purple;
                break;
            default:
                break;
        }
    }
}
Private Sub MouseButtonDownHandler(ByVal sender As Object, ByVal e As MouseButtonEventArgs)
    Dim src As Control = TryCast(e.Source, Control)

    If src IsNot Nothing Then
        Select Case e.ChangedButton
            Case MouseButton.Left
                src.Background = Brushes.Green
            Case MouseButton.Middle
                src.Background = Brushes.Red
            Case MouseButton.Right
                src.Background = Brushes.Yellow
            Case MouseButton.XButton1
                src.Background = Brushes.Brown
            Case MouseButton.XButton2
                src.Background = Brushes.Purple
            Case Else
        End Select
    End If
End Sub

Si applica a

Vedi anche