SelectionItemPattern.ElementSelectedEvent Campo
Importante
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Identifica o evento que é gerado quando uma chamada para qualquer um dos Select(), AddToSelection() ou RemoveFromSelection() resulta na seleção de um único item.
public: static initonly System::Windows::Automation::AutomationEvent ^ ElementSelectedEvent;
public static readonly System.Windows.Automation.AutomationEvent ElementSelectedEvent;
staticval mutable ElementSelectedEvent : System.Windows.Automation.AutomationEvent
Public Shared ReadOnly ElementSelectedEvent As AutomationEvent
No exemplo a seguir, os ouvintes de eventos são declarados para os SelectionItemPattern eventos.
///--------------------------------------------------------------------
/// <summary>
/// Subscribe to the selection item events of interest.
/// </summary>
/// <param name="selectionItem">
/// Automation element that supports SelectionItemPattern and is
/// a child of a selection container that supports SelectionPattern
/// </param>
/// <remarks>
/// The events are raised by the SelectionItem elements,
/// not the Selection container.
/// </remarks>
///--------------------------------------------------------------------
private void SetSelectionEventHandlers
(AutomationElement selectionItem)
{
AutomationEventHandler selectionHandler =
new AutomationEventHandler(SelectionHandler);
Automation.AddAutomationEventHandler(
SelectionItemPattern.ElementSelectedEvent,
selectionItem,
TreeScope.Element,
SelectionHandler);
Automation.AddAutomationEventHandler(
SelectionItemPattern.ElementAddedToSelectionEvent,
selectionItem,
TreeScope.Element,
SelectionHandler);
Automation.AddAutomationEventHandler(
SelectionItemPattern.ElementRemovedFromSelectionEvent,
selectionItem,
TreeScope.Element,
SelectionHandler);
}
private void SelectionHandler(object src, AutomationEventArgs e)
{
// TODO: event handling
}
'''--------------------------------------------------------------------
''' <summary>
''' Subscribe to the selection item events of interest.
''' </summary>
''' <param name="selectionItem">
''' Automation element that supports SelectionItemPattern and is
''' a child of a selection container that supports SelectionPattern
''' </param>
''' <remarks>
''' The events are raised by the SelectionItem elements,
''' not the Selection container.
''' </remarks>
'''--------------------------------------------------------------------
Private Sub SetSelectionEventHandlers( _
ByVal selectionItem As AutomationElement)
Dim selectionHandler As AutomationEventHandler = _
New AutomationEventHandler(AddressOf OnSelectionHandler)
Automation.AddAutomationEventHandler( _
SelectionItemPattern.ElementSelectedEvent, _
selectionItem, TreeScope.Element, selectionHandler)
Automation.AddAutomationEventHandler( _
SelectionItemPattern.ElementAddedToSelectionEvent, _
selectionItem, TreeScope.Element, selectionHandler)
Automation.AddAutomationEventHandler( _
SelectionItemPattern.ElementRemovedFromSelectionEvent, _
selectionItem, TreeScope.Element, selectionHandler)
End Sub
Private Sub OnSelectionHandler(ByVal src As Object, ByVal e As AutomationEventArgs)
' TODO: event handling
End Sub
Esse identificador é usado por aplicativos cliente Automação da Interface do Usuário. Automação da Interface do Usuário provedores devem usar o campo equivalente em SelectionItemPatternIdentifiers.
Produto | Versões |
---|---|
.NET Framework | 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 |
Windows Desktop | 3.0, 3.1, 5, 6, 7 |