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

Definizione

Notifica alle applicazioni client di accessibilità l'oggetto AccessibleEvents.Notifies the accessibility client applications of AccessibleEvents.

Overload

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

Notifica alle applicazioni client di accessibilità l'oggetto AccessibleEvents specificato per il controllo figlio specifico.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 alle applicazioni client di accessibilità l'oggetto AccessibleEvents specificato per il controllo figlio specifico.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 alle applicazioni client di accessibilità l'oggetto AccessibleEvents specificato per il controllo figlio specifico.Notifies the accessibility client applications of the specified AccessibleEvents for the specified child control.

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

Parametri

accEvent
AccessibleEvents AccessibleEvents AccessibleEvents AccessibleEvents

Oggetto AccessibleEvents da notificare alle applicazioni client di accessibilità.The AccessibleEvents to notify the accessibility client applications of.

childID
Int32 Int32 Int32 Int32

Controllo Control figlio cui notificare l'evento accessibile.The child Control to notify of the accessible event.

Esempi

L'esempio di codice seguente illustra la creazione di un grafico di supporto per l'accessibilità controllare, tramite il AccessibleObject e Control.ControlAccessibleObject classi per esporre le informazioni accessibili.The following code example demonstrates the creation of an accessibility-aware chart control, using the AccessibleObject and Control.ControlAccessibleObject classes to expose accessible information. Il controllo è rappresentata da due curve insieme a una legenda.The control plots two curves along with a legend. Il ChartControlAccessibleObject classe che deriva da ControlAccessibleObject, viene utilizzata la CreateAccessibilityInstance metodo per fornire informazioni accessibili personalizzate per il controllo chart.The ChartControlAccessibleObject class, which derives from ControlAccessibleObject, is used in the CreateAccessibilityInstance method to provide custom accessible information for the chart control. Poiché la legenda del grafico non è un vero e proprio Control -controllo in base al, ma viene disegnata dal controllo chart, non non contiene informazioni accessibili.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. Per questo motivo, il ChartControlAccessibleObject classe esegue l'override di GetChild per restituire il CurveLegendAccessibleObject che rappresenta le informazioni accessibili per ogni parte della 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 un'applicazione accessibile riconoscere utilizza questo controllo, il controllo può fornire le informazioni necessarie accessibile.When an accessible-aware application uses this control, the control can provide the necessary accessible information.

Questo estratto di codice viene illustrato come chiamare il AccessibilityNotifyClients (metodo).This code excerpt demonstrates calling the AccessibilityNotifyClients method. Vedere il AccessibleObject Cenni preliminari sulla classe per l'esempio di codice 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

Commenti

È necessario chiamare il Control.ControlAccessibleObject.NotifyClients per ogni metodo AccessibleEvents sono le applicazioni client di accessibilità per ricevere una notifica di.You must call the Control.ControlAccessibleObject.NotifyClients method for each AccessibleEvents the accessibility client applications are to be notified of. Il NotifyClients metodo viene chiamato in genere quando una proprietà viene impostata oppure da un gestore eventi.The NotifyClients method is typically called when a property is set or from within an event handler. Ad esempio, è possibile chiamare il NotifyClients (metodo) e passare un' AccessibleEvents pari a Hide all'interno del gestore eventi per il 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.

Vedi anche

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

Notifica alle applicazioni client di accessibilità l'oggetto AccessibleEvents specificato per il controllo figlio specifico.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)

Parametri

accEvent
AccessibleEvents AccessibleEvents AccessibleEvents AccessibleEvents

Oggetto AccessibleEvents da notificare alle applicazioni client di accessibilità.The AccessibleEvents to notify the accessibility client applications of.

objectID
Int32 Int32 Int32 Int32

Identificatore di AccessibleObject.The identifier of the AccessibleObject.

childID
Int32 Int32 Int32 Int32

Controllo Control figlio cui notificare l'evento accessibile.The child Control to notify of the accessible event.

Si applica a