Visual.HitTestCore Method

Definition

Determina si un punto geométrico está dentro de los límites del objeto visual.Determines whether a point or geometry value is within the bounds of the visual object.

Overloads

HitTestCore(GeometryHitTestParameters)

Determina si un valor geométrico está dentro de los límites del objeto visual.Determines whether a geometry value is within the bounds of the visual object.

HitTestCore(PointHitTestParameters)

Determina si un valor de coordenada de punto está dentro de los límites del objeto visual.Determines whether a point coordinate value is within the bounds of the visual object.

HitTestCore(GeometryHitTestParameters)

Determina si un valor geométrico está dentro de los límites del objeto visual.Determines whether a geometry value is within the bounds of the visual object.

protected:
 virtual System::Windows::Media::GeometryHitTestResult ^ HitTestCore(System::Windows::Media::GeometryHitTestParameters ^ hitTestParameters);
protected virtual System.Windows.Media.GeometryHitTestResult HitTestCore (System.Windows.Media.GeometryHitTestParameters hitTestParameters);
abstract member HitTestCore : System.Windows.Media.GeometryHitTestParameters -> System.Windows.Media.GeometryHitTestResult
override this.HitTestCore : System.Windows.Media.GeometryHitTestParameters -> System.Windows.Media.GeometryHitTestResult
Protected Overridable Function HitTestCore (hitTestParameters As GeometryHitTestParameters) As GeometryHitTestResult

Parameters

hitTestParameters
GeometryHitTestParameters

Objeto GeometryHitTestParameters que especifica el objeto Geometry en el que se ejecuta la prueba de posicionamiento.A GeometryHitTestParameters object that specifies the Geometry to hit test against.

Returns

GeometryHitTestResult

Objeto GeometryHitTestResult que representa el resultado de la prueba de posicionamiento.A GeometryHitTestResult that represents the result of the hit test.

Examples

En el ejemplo siguiente se muestra cómo se invalida el método HitTestCore(GeometryHitTestParameters).The following example shows how to override the HitTestCore(GeometryHitTestParameters) method. Uno de los motivos por los que podría querer invalidar este método es proporcionar funcionalidad adicional durante el proceso de prueba de posicionamiento.One reason you might want to override this method is to provide additional functionality during the hit testing process.

// Override default hit test support in visual object.
protected override GeometryHitTestResult HitTestCore(GeometryHitTestParameters hitTestParameters)
{
    IntersectionDetail intersectionDetail = IntersectionDetail.NotCalculated;

    // Perform custom actions during the hit test processing.

    return new GeometryHitTestResult(this, intersectionDetail);
}
' Override default hit test support in visual object.
Protected Overrides Overloads Function HitTestCore(ByVal hitTestParameters As GeometryHitTestParameters) As GeometryHitTestResult
    Dim intersectionDetail As IntersectionDetail = IntersectionDetail.NotCalculated

    ' Perform custom actions during the hit test processing.

    Return New GeometryHitTestResult(Me, intersectionDetail)
End Function

Remarks

Puede invalidar la compatibilidad con la prueba de posicionamiento predeterminada para un objeto visual invalidando el método HitTestCore.You can override default hit testing support for a visual object by overriding the HitTestCore method. Esto significa que cuando se invoca el método HitTest, se llama a la implementación invalidada de HitTestCore.This means that when you invoke the HitTest method, your overridden implementation of HitTestCore is called. Se llama al método invalidado cuando una prueba de posicionamiento cae dentro del rectángulo delimitador del objeto visual, incluso si la coordenada está fuera de la geometría del objeto visual.Your overridden method is called when a hit test falls within the bounding rectangle of the visual object, even if the coordinate falls outside the geometry of the visual object.

HitTestCore(PointHitTestParameters)

Determina si un valor de coordenada de punto está dentro de los límites del objeto visual.Determines whether a point coordinate value is within the bounds of the visual object.

protected:
 virtual System::Windows::Media::HitTestResult ^ HitTestCore(System::Windows::Media::PointHitTestParameters ^ hitTestParameters);
protected virtual System.Windows.Media.HitTestResult HitTestCore (System.Windows.Media.PointHitTestParameters hitTestParameters);
abstract member HitTestCore : System.Windows.Media.PointHitTestParameters -> System.Windows.Media.HitTestResult
override this.HitTestCore : System.Windows.Media.PointHitTestParameters -> System.Windows.Media.HitTestResult
Protected Overridable Function HitTestCore (hitTestParameters As PointHitTestParameters) As HitTestResult

Parameters

hitTestParameters
PointHitTestParameters

Objeto PointHitTestParameters que especifica el objeto Point en el que se ejecuta la prueba de posicionamiento.A PointHitTestParameters object that specifies the Point to hit test against.

Returns

HitTestResult

Objeto HitTestResult, que representa el objeto Visual devuelto desde la prueba de posicionamiento.A HitTestResult that represents the Visual that is returned from a hit test.

Examples

En el ejemplo siguiente se muestra cómo se invalida el método HitTestCore(PointHitTestParameters).The following example shows how to override the HitTestCore(PointHitTestParameters) method. Uno de los motivos por los que podría querer invalidar este método es proporcionar funcionalidad adicional durante el proceso de prueba de posicionamiento.One reason you might want to override this method is to provide additional functionality during the hit testing process.

// Override default hit test support in visual object.
protected override HitTestResult HitTestCore(PointHitTestParameters hitTestParameters)
{
    Point pt = hitTestParameters.HitPoint;

    // Perform custom actions during the hit test processing,
    // which may include verifying that the point actually
    // falls within the rendered content of the visual.

    // Return hit on bounding rectangle of visual object.
    return new PointHitTestResult(this, pt);
}
' Override default hit test support in visual object.
Protected Overrides Overloads Function HitTestCore(ByVal hitTestParameters As PointHitTestParameters) As HitTestResult
    Dim pt As Point = hitTestParameters.HitPoint

    ' Perform custom actions during the hit test processing,
    ' which may include verifying that the point actually
    ' falls within the rendered content of the visual.

    ' Return hit on bounding rectangle of visual object.
    Return New PointHitTestResult(Me, pt)
End Function

Remarks

Puede invalidar la compatibilidad con la prueba de posicionamiento predeterminada en objetos visuales invalidando el método HitTestCore.You can override the default hit testing support on visual objects by overriding the HitTestCore method. Esto significa que cuando se invoca el método HitTest, se llama a la implementación invalidada de HitTestCore.This means that when you invoke the HitTest method, your overridden implementation of HitTestCore is called. Se llama al método invalidado cuando una prueba de posicionamiento cae dentro del rectángulo delimitador del objeto visual, incluso si la coordenada está fuera de la geometría del objeto visual.Your overridden method is called when a hit test falls within the bounding rectangle of the visual object, even if the coordinate falls outside the geometry of the visual object.

Applies to