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

Definition

Benachrichtigt Clientanwendungen für die Barrierefreiheit über AccessibleEvents.Notifies the accessibility client applications of AccessibleEvents.

Überlädt

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

Benachrichtigt die Clientanwendungen für die Barrierefreiheit über die angegebenen AccessibleEvents für das angegebene untergeordnete Steuerelement.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)

Benachrichtigt die Clientanwendungen für die Barrierefreiheit über die angegebenen AccessibleEvents für das angegebene untergeordnete Steuerelement.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)

Benachrichtigt die Clientanwendungen für die Barrierefreiheit über die angegebenen AccessibleEvents für das angegebene untergeordnete Steuerelement.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)

Parameter

accEvent
AccessibleEvents AccessibleEvents AccessibleEvents AccessibleEvents

Die AccessibleEvents-Enumeration, über die die Clientanwendungen für die Barrierefreiheit benachrichtigt werden sollen.The AccessibleEvents to notify the accessibility client applications of.

childID
Int32 Int32 Int32 Int32

Das untergeordnete Control, das über das barrierefreie Ereignis benachrichtigt werden soll.The child Control to notify of the accessible event.

Beispiele

Das folgende Codebeispiel veranschaulicht die Erstellung eines Diagramms Eingabehilfen-fähigen steuern, mit der AccessibleObject und Control.ControlAccessibleObject Klassen zugegriffen werden kann Informationen verfügbar machen.The following code example demonstrates the creation of an accessibility-aware chart control, using the AccessibleObject and Control.ControlAccessibleObject classes to expose accessible information. Das Steuerelement zeichnet zwei Kurven geteilt. zusammen mit einer Legende an.The control plots two curves along with a legend. Die ChartControlAccessibleObject -Klasse, die abgeleitet ControlAccessibleObject, werden in der CreateAccessibilityInstance Methode, um benutzerdefinierte zugegriffen werden Informationen für das Diagrammsteuerelement bereitzustellen.The ChartControlAccessibleObject class, which derives from ControlAccessibleObject, is used in the CreateAccessibilityInstance method to provide custom accessible information for the chart control. Da die Legende des Flächendiagramms nicht tatsächlich Control --basiertes Steuerelement, sondern gezeichnet wird vom Diagrammsteuerelement, die es weist keine Informationen für integrierte zugegriffen werden kann.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. Aus diesem Grund die ChartControlAccessibleObject -Klasse überschreibt die GetChild -Methode zur Rückgabe der CurveLegendAccessibleObject , zugegriffen werden Informationen für jeden Teil der Legende darstellt.Because of this, the ChartControlAccessibleObject class overrides the GetChild method to return the CurveLegendAccessibleObject that represents accessible information for each part of the legend. Wenn eine zugänglich-fähige Anwendung dieses Steuerelement verwendet wird, bieten das Steuerelement die erforderlichen Informationen für die zugegriffen werden kann.When an accessible-aware application uses this control, the control can provide the necessary accessible information.

Dieser Code veranschaulicht Aufrufen der AccessibilityNotifyClients Methode.This code excerpt demonstrates calling the AccessibilityNotifyClients method. Finden Sie unter den AccessibleObject Übersicht über die Klasse für das gesamte Codebeispiel dargestellt.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

Hinweise

Rufen Sie die Control.ControlAccessibleObject.NotifyClients Methode für die einzelnen AccessibleEvents sind, dass die Clientanwendungen für Barrierefreiheit benachrichtigt zu werden.You must call the Control.ControlAccessibleObject.NotifyClients method for each AccessibleEvents the accessibility client applications are to be notified of. Die NotifyClients Methode wird normalerweise aufgerufen, wenn eine Eigenschaft festgelegt oder innerhalb eines ereignishandlers.The NotifyClients method is typically called when a property is set or from within an event handler. Sie können z. B. Aufrufen der NotifyClients -Methode und übergeben Sie ein AccessibleEvents Wert Hide aus innerhalb des ereignishandlers für die Control.VisibleChanged Ereignis.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.

Siehe auch

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

Benachrichtigt die Clientanwendungen für die Barrierefreiheit über die angegebenen AccessibleEvents für das angegebene untergeordnete Steuerelement.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)

Parameter

accEvent
AccessibleEvents AccessibleEvents AccessibleEvents AccessibleEvents

Die AccessibleEvents-Enumeration, über die die Clientanwendungen für die Barrierefreiheit benachrichtigt werden sollen.The AccessibleEvents to notify the accessibility client applications of.

objectID
Int32 Int32 Int32 Int32

Der Bezeichner von AccessibleObject.The identifier of the AccessibleObject.

childID
Int32 Int32 Int32 Int32

Das untergeordnete Control, das über das barrierefreie Ereignis benachrichtigt werden soll.The child Control to notify of the accessible event.

Gilt für: