MouseWheelEventArgs MouseWheelEventArgs MouseWheelEventArgs MouseWheelEventArgs Class

Definición

Proporciona datos para varios eventos que informan de cambios en el valor delta de la rueda del mouse.Provides data for various events that report changes to the mouse wheel delta value of a mouse device.

public ref class MouseWheelEventArgs : System::Windows::Input::MouseEventArgs
public class MouseWheelEventArgs : System.Windows.Input.MouseEventArgs
type MouseWheelEventArgs = class
    inherit MouseEventArgs
Public Class MouseWheelEventArgs
Inherits MouseEventArgs
Herencia

Ejemplos

En el ejemplo siguiente se mueve una TextBox superior si la rueda del mouse Delta es positivo y mueve el TextBox desplegable si la rueda del mouse Delta es negativo.The following example moves a TextBox up if the mouse wheel Delta is positive and moves the TextBox down if the mouse wheel Delta is negative. El TextBox se adjunta a un Canvas.The TextBox is attached to a Canvas.

// Moves the TextBox named box when the mouse wheel is rotated.
// The TextBox is on a Canvas named MainCanvas.
private void MouseWheelHandler(object sender, MouseWheelEventArgs e)
{
    // If the mouse wheel delta is positive, move the box up.
    if (e.Delta > 0)
    {
        if (Canvas.GetTop(box) >= 1)
        {
            Canvas.SetTop(box, Canvas.GetTop(box) - 1);
        }
    }

    // If the mouse wheel delta is negative, move the box down.
    if (e.Delta < 0)
    {
        if ((Canvas.GetTop(box) + box.Height) <= (MainCanvas.Height))
        {
            Canvas.SetTop(box, Canvas.GetTop(box) + 1);
        }
    }

}
' Moves the TextBox named box when the mouse wheel is rotated.
' The TextBox is on a Canvas named MainCanvas.
Private Sub MouseWheelHandler(ByVal sender As Object, ByVal e As MouseWheelEventArgs)
    ' If the mouse wheel delta is positive, move the box up.
    If e.Delta > 0 Then
        If Canvas.GetTop(box) >= 1 Then
            Canvas.SetTop(box, Canvas.GetTop(box) - 1)
        End If
    End If

    ' If the mouse wheel delta is negative, move the box down.
    If e.Delta < 0 Then
        If (Canvas.GetTop(box) + box.Height) <= MainCanvas.Height Then
            Canvas.SetTop(box, Canvas.GetTop(box) + 1)
        End If
    End If

End Sub

Comentarios

MouseWheelEventArgs se utiliza con los siguientes eventos:MouseWheelEventArgs is used with the following events:

El Delta propiedad es positivo si la rueda del mouse se mueve hacia arriba o hacia delante (hacia el usuario) o negativo si la rueda del mouse se mueve hacia abajo o hacia atrás (hacia el usuario).The Delta property is positive if the mouse wheel is moved upward or forward (away from the user) or negative if the mouse wheel is moved downward or backward (toward the user).

Este evento se desencadena incluso para los movimientos de la rueda del mouse pequeño.This event is raised even for small mouse wheel movements. En algunos escenarios, es adecuado implementar los controladores que limitación los deltas de rueda del mouse pequeño comprobando si el valor delta supera un umbral determinado.For some scenarios, it is appropriate to implement handlers that throttle small mouse wheel deltas by checking whether the delta exceeds a certain threshold. En caso contrario, podría invocar el controlador para los casos donde estaba tan pequeño que cualquier interfaz de usuario que está relacionada con el movimiento de la rueda del mouse no se actualizaría el delta de la rueda del mouse.Otherwise, you might invoke your handler for cases where the mouse wheel delta was so small that any UI that is tied to the mouse wheel movement would not update. Exactamente cómo implementar el comportamiento de umbral en un controlador y cuál debe ser ese umbral es completamente específico de la implementación.Exactly how you implement the threshold behavior in a handler and what that threshold should be is entirely implementation-specific.

Constructores

MouseWheelEventArgs(MouseDevice, Int32, Int32) MouseWheelEventArgs(MouseDevice, Int32, Int32) MouseWheelEventArgs(MouseDevice, Int32, Int32) MouseWheelEventArgs(MouseDevice, Int32, Int32)

Inicializa una nueva instancia de la clase MouseWheelEventArgs.Initializes a new instance of the MouseWheelEventArgs class.

Propiedades

Delta Delta Delta Delta

Obtiene un valor que indica la medida en que ha cambiado la rueda del mouse.Gets a value that indicates the amount that the mouse wheel has changed.

Device Device Device Device

Obtiene el dispositivo de entrada que inició este evento.Gets the input device that initiated this event.

(Inherited from InputEventArgs)
Handled Handled Handled Handled

Obtiene o establece un valor que indica el estado actual del control de eventos para un evento enrutado cuando recorre la ruta.Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route.

(Inherited from RoutedEventArgs)
LeftButton LeftButton LeftButton LeftButton

Obtiene el estado actual del botón primario del mouse.Gets the current state of the left mouse button.

(Inherited from MouseEventArgs)
MiddleButton MiddleButton MiddleButton MiddleButton

Obtiene el estado actual del botón central del mouse.Gets the current state of the middle mouse button.

(Inherited from MouseEventArgs)
MouseDevice MouseDevice MouseDevice MouseDevice

Obtiene el dispositivo de mouse asociado a este evento.Gets the mouse device associated with this event.

(Inherited from MouseEventArgs)
OriginalSource OriginalSource OriginalSource OriginalSource

Obtiene el origen inicial de los informes determinado por pruebas de acceso puro, antes de que una clase primaria realice posibles ajustes de Source.Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class.

(Inherited from RoutedEventArgs)
RightButton RightButton RightButton RightButton

Obtiene el estado actual del botón secundario del mouse.Gets the current state of the right mouse button.

(Inherited from MouseEventArgs)
RoutedEvent RoutedEvent RoutedEvent RoutedEvent

Obtiene o establece el RoutedEvent asociado a esta instancia RoutedEventArgs.Gets or sets the RoutedEvent associated with this RoutedEventArgs instance.

(Inherited from RoutedEventArgs)
Source Source Source Source

Obtiene o establece una referencia al objeto que generó el evento.Gets or sets a reference to the object that raised the event.

(Inherited from RoutedEventArgs)
StylusDevice StylusDevice StylusDevice StylusDevice

Obtiene el dispositivo de lápiz óptico asociado a este evento.Gets the stylus device associated with this event.

(Inherited from MouseEventArgs)
Timestamp Timestamp Timestamp Timestamp

Obtiene la hora a la que se produjo este evento.Gets the time when this event occurred.

(Inherited from InputEventArgs)
XButton1 XButton1 XButton1 XButton1

Obtiene el estado actual del primer botón de mouse extendido.Gets the current state of the first extended mouse button.

(Inherited from MouseEventArgs)
XButton2 XButton2 XButton2 XButton2

Obtiene el estado del segundo botón de mouse extendido.Gets the state of the second extended mouse button.

(Inherited from MouseEventArgs)

Métodos

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determina si el objeto especificado es igual al objeto actual.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Sirve como la función hash predeterminada.Serves as the default hash function.

(Inherited from Object)
GetPosition(IInputElement) GetPosition(IInputElement) GetPosition(IInputElement) GetPosition(IInputElement)

Obtiene la posición del puntero del mouse con respecto al elemento especificado.Returns the position of the mouse pointer relative to the specified element.

(Inherited from MouseEventArgs)
GetType() GetType() GetType() GetType()

Obtiene el Type de la instancia actual.Gets the Type of the current instance.

(Inherited from Object)
InvokeEventHandler(Delegate, Object) InvokeEventHandler(Delegate, Object) InvokeEventHandler(Delegate, Object) InvokeEventHandler(Delegate, Object)

Invoca los controladores de eventos de una manera específica del tipo, lo que puede aumentar la eficacia del sistema de eventos.Invokes event handlers in a type-specific way, which can increase event system efficiency.

MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Crea una copia superficial del Object actual.Creates a shallow copy of the current Object.

(Inherited from Object)
OnSetSource(Object) OnSetSource(Object) OnSetSource(Object) OnSetSource(Object)

Cuando se invalida en una clase derivada, proporciona una entrada de devolución de llamada de notificación cada vez que seleccione el valor de la Source propiedad de los cambios de la instancia.When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes.

(Inherited from RoutedEventArgs)
ToString() ToString() ToString() ToString()

Devuelve una cadena que representa el objeto actual.Returns a string that represents the current object.

(Inherited from Object)

Se aplica a

Consulte también: