Control.AccessibilityNotifyClients Control.AccessibilityNotifyClients Control.AccessibilityNotifyClients Control.AccessibilityNotifyClients Method

Definição

Notifica os aplicativos cliente de acessibilidade do AccessibleEvents.Notifies the accessibility client applications of AccessibleEvents.

Sobrecargas

AccessibilityNotifyClients(AccessibleEvents, Int32) AccessibilityNotifyClients(AccessibleEvents, Int32) AccessibilityNotifyClients(AccessibleEvents, Int32) AccessibilityNotifyClients(AccessibleEvents, Int32)

Notifica os aplicativos cliente de acessibilidade do AccessibleEvents especificado para o controle filho especificado.Notifies the accessibility client applications of the specified AccessibleEvents for the specified child control.

AccessibilityNotifyClients(AccessibleEvents, Int32, Int32) AccessibilityNotifyClients(AccessibleEvents, Int32, Int32) AccessibilityNotifyClients(AccessibleEvents, Int32, Int32) AccessibilityNotifyClients(AccessibleEvents, Int32, Int32)

Notifica os aplicativos cliente de acessibilidade do AccessibleEvents especificado para o controle filho especificado.Notifies the accessibility client applications of the specified AccessibleEvents for the specified child control .

AccessibilityNotifyClients(AccessibleEvents, Int32) AccessibilityNotifyClients(AccessibleEvents, Int32) AccessibilityNotifyClients(AccessibleEvents, Int32) AccessibilityNotifyClients(AccessibleEvents, Int32)

Notifica os aplicativos cliente de acessibilidade do AccessibleEvents especificado para o controle filho especificado.Notifies the accessibility client applications of the specified AccessibleEvents for the specified child control.

protected:
 void AccessibilityNotifyClients(System::Windows::Forms::AccessibleEvents accEvent, int childID);
protected void AccessibilityNotifyClients (System.Windows.Forms.AccessibleEvents accEvent, int childID);
member this.AccessibilityNotifyClients : System.Windows.Forms.AccessibleEvents * int -> unit
Protected Sub AccessibilityNotifyClients (accEvent As AccessibleEvents, childID As Integer)

Parâmetros

accEvent
AccessibleEvents AccessibleEvents AccessibleEvents AccessibleEvents

O AccessibleEvents para notificar os aplicativos cliente de acessibilidade.The AccessibleEvents to notify the accessibility client applications of.

childID
Int32 Int32 Int32 Int32

O Control filho para notificar o evento acessível.The child Control to notify of the accessible event.

Exemplos

O exemplo de código a seguir demonstra a criação de um controle de gráfico com reconhecimento de AccessibleObject acessibilidade Control.ControlAccessibleObject , usando as classes e para expor informações acessíveis.The following code example demonstrates the creation of an accessibility-aware chart control, using the AccessibleObject and Control.ControlAccessibleObject classes to expose accessible information. O controle plota duas curvas junto com uma legenda.The control plots two curves along with a legend. A ChartControlAccessibleObject classe, que deriva de ControlAccessibleObject CreateAccessibilityInstance , é usada no método para fornecer informações personalizadas acessíveis para o controle de gráfico.The ChartControlAccessibleObject class, which derives from ControlAccessibleObject, is used in the CreateAccessibilityInstance method to provide custom accessible information for the chart control. Como a legenda do gráfico não é um Control controle baseado em real, mas, em vez disso, é desenhada pelo controle de gráfico, não há nenhuma informação acessível interna.Since the chart legend is not an actual Control -based control, but instead is drawn by the chart control, it does not any built-in accessible information. Por isso, a ChartControlAccessibleObject classe substitui o GetChild método para retornar o CurveLegendAccessibleObject que representa informações acessíveis para cada parte da legenda.Because of this, the ChartControlAccessibleObject class overrides the GetChild method to return the CurveLegendAccessibleObject that represents accessible information for each part of the legend. Quando um aplicativo com reconhecimento de acessibilidade usa esse controle, o controle pode fornecer as informações de acessibilidade necessárias.When an accessible-aware application uses this control, the control can provide the necessary accessible information.

Este trecho de código demonstra como AccessibilityNotifyClients chamar o método.This code excerpt demonstrates calling the AccessibilityNotifyClients method. Consulte a AccessibleObject visão geral de classe para obter o exemplo de código completo.See the AccessibleObject class overview for the complete code example.

   // Gets or sets the location for the curve legend.
   Point get()
   {
      return location;
   }

   void set( Point value )
   {
      location = value;
      chart->Invalidate();
      
      // Notifies the chart of the location change. This is used for
      // the accessibility information. AccessibleEvents::LocationChange
      // tells the chart the reason for the notification.
      chart->AccessibilityNotifyClients( AccessibleEvents::LocationChange, (dynamic_cast<CurveLegendAccessibleObject^>(AccessibilityObject))->ID );
   }

}

property String^ Name 
{

   // Gets or sets the Name for the curve legend.
   String^ get()
   {
      return name;
   }

   void set( String^ value )
   {
      if ( name != value )
      {
         name = value;
         chart->Invalidate();
         
         // Notifies the chart of the name change. This is used for
         // the accessibility information. AccessibleEvents::NameChange
         // tells the chart the reason for the notification.
         chart->AccessibilityNotifyClients( AccessibleEvents::NameChange, (dynamic_cast<CurveLegendAccessibleObject^>(AccessibilityObject))->ID );
      }
   }

}

property bool Selected 
{

   // Gets or sets the Selected state for the curve legend.
   bool get()
   {
      return selected;
   }

   void set( bool value )
   {
      if ( selected != value )
      {
         selected = value;
         chart->Invalidate();
         
         // Notifies the chart of the selection value change. This is used for
         // the accessibility information. The AccessibleEvents value depends upon
         // if the selection is true (AccessibleEvents::SelectionAdd) or
         // false (AccessibleEvents::SelectionRemove).
         chart->AccessibilityNotifyClients( selected ? AccessibleEvents::SelectionAdd : AccessibleEvents::SelectionRemove, (dynamic_cast<CurveLegendAccessibleObject^>(AccessibilityObject))->ID );
      }
   }
// Gets or sets the location for the curve legend.
public Point Location
{   
    get {
        return location;
    }
    set {
        location = value;
        chart.Invalidate();

        // Notifies the chart of the location change. This is used for
        // the accessibility information. AccessibleEvents.LocationChange
        // tells the chart the reason for the notification.

        chart.AccessibilityNotifyClients(AccessibleEvents.LocationChange, 
            ((CurveLegendAccessibleObject)AccessibilityObject).ID);
    }
}            

// Gets or sets the Name for the curve legend.
public string Name
{   
    get {
        return name;
    }
    set {
        if (name != value) 
        {
            name = value;
            chart.Invalidate();

            // Notifies the chart of the name change. This is used for
            // the accessibility information. AccessibleEvents.NameChange
            // tells the chart the reason for the notification.

            chart.AccessibilityNotifyClients(AccessibleEvents.NameChange, 
                ((CurveLegendAccessibleObject)AccessibilityObject).ID);
        }
    }
}

// Gets or sets the Selected state for the curve legend.
public bool Selected
{   
    get {
        return selected;
    }
    set {
        if (selected != value) 
        {
            selected = value;
            chart.Invalidate();

            // Notifies the chart of the selection value change. This is used for
            // the accessibility information. The AccessibleEvents value depends upon
            // if the selection is true (AccessibleEvents.SelectionAdd) or 
            // false (AccessibleEvents.SelectionRemove).
            chart.AccessibilityNotifyClients(
                selected ? AccessibleEvents.SelectionAdd : AccessibleEvents.SelectionRemove, 
                ((CurveLegendAccessibleObject)AccessibilityObject).ID);
        }
    }
}
' Gets or sets the location for the curve legend.            
Public Property Location() As Point
    Get
        Return m_location
    End Get
    Set
        m_location = value
        chart.Invalidate()

        ' Notifies the chart of the location change. This is used for
        ' the accessibility information. AccessibleEvents.LocationChange
        ' tells the chart the reason for the notification.
        chart.ExposeAccessibilityNotifyClients(AccessibleEvents.LocationChange, _
                CType(AccessibilityObject, CurveLegendAccessibleObject).ID)
    End Set
End Property

' Gets or sets the Name for the curve legend.            
Public Property Name() As String
    Get
        Return m_name
    End Get
    Set
        If m_name <> value Then
            m_name = value
            chart.Invalidate()

            ' Notifies the chart of the name change. This is used for
            ' the accessibility information. AccessibleEvents.NameChange
            ' tells the chart the reason for the notification. 
            chart.ExposeAccessibilityNotifyClients(AccessibleEvents.NameChange, _
                    CType(AccessibilityObject, CurveLegendAccessibleObject).ID)
        End If
    End Set
End Property

' Gets or sets the Selected state for the curve legend.            
Public Property Selected() As Boolean
    Get
        Return m_selected
    End Get
    Set
        If m_selected <> value Then
            m_selected = value
            chart.Invalidate()

            ' Notifies the chart of the selection value change. This is used for
            ' the accessibility information. The AccessibleEvents value varies
            ' on whether the selection is true (AccessibleEvents.SelectionAdd) or 
            ' false (AccessibleEvents.SelectionRemove). 
            If m_selected Then
                chart.ExposeAccessibilityNotifyClients(AccessibleEvents.SelectionAdd, _
                        CType(AccessibilityObject, CurveLegendAccessibleObject).ID) 
            Else
                chart.ExposeAccessibilityNotifyClients(AccessibleEvents.SelectionRemove, _
                        CType(AccessibilityObject, CurveLegendAccessibleObject).ID) 
            End If
        End If
    End Set
End Property

Comentários

Você deve chamar o Control.ControlAccessibleObject.NotifyClients método para cada AccessibleEvents um dos aplicativos cliente de acessibilidade que devem ser notificados.You must call the Control.ControlAccessibleObject.NotifyClients method for each AccessibleEvents the accessibility client applications are to be notified of. O NotifyClients método é normalmente chamado quando uma propriedade é definida ou de dentro de um manipulador de eventos.The NotifyClients method is typically called when a property is set or from within an event handler. Por exemplo, você pode chamar o NotifyClients método e passar um AccessibleEvents valor de Hide de dentro do manipulador de eventos para o Control.VisibleChanged evento.For example, you might call the NotifyClients method and pass in an AccessibleEvents value of Hide from within the event handler for the Control.VisibleChanged event.

Veja também

AccessibilityNotifyClients(AccessibleEvents, Int32, Int32) AccessibilityNotifyClients(AccessibleEvents, Int32, Int32) AccessibilityNotifyClients(AccessibleEvents, Int32, Int32) AccessibilityNotifyClients(AccessibleEvents, Int32, Int32)

Notifica os aplicativos cliente de acessibilidade do AccessibleEvents especificado para o controle filho especificado.Notifies the accessibility client applications of the specified AccessibleEvents for the specified child control .

protected:
 void AccessibilityNotifyClients(System::Windows::Forms::AccessibleEvents accEvent, int objectID, int childID);
protected void AccessibilityNotifyClients (System.Windows.Forms.AccessibleEvents accEvent, int objectID, int childID);
member this.AccessibilityNotifyClients : System.Windows.Forms.AccessibleEvents * int * int -> unit
Protected Sub AccessibilityNotifyClients (accEvent As AccessibleEvents, objectID As Integer, childID As Integer)

Parâmetros

accEvent
AccessibleEvents AccessibleEvents AccessibleEvents AccessibleEvents

O AccessibleEvents para notificar os aplicativos cliente de acessibilidade.The AccessibleEvents to notify the accessibility client applications of.

objectID
Int32 Int32 Int32 Int32

O identificador do AccessibleObject.The identifier of the AccessibleObject.

childID
Int32 Int32 Int32 Int32

O Control filho para notificar o evento acessível.The child Control to notify of the accessible event.

Aplica-se a