Uredi

Deli z drugimi prek

ToolTip.Opened Event

  • Reference

Definition

Namespace:
System.Windows.Controls
Assembly:
PresentationFramework.dll

Occurs when a ToolTip becomes visible.

public:
 event System::Windows::RoutedEventHandler ^ Opened;
public event System.Windows.RoutedEventHandler Opened;
member this.Opened : System.Windows.RoutedEventHandler 
Public Custom Event Opened As RoutedEventHandler

Event Type

RoutedEventHandler

Examples

The following example shows how to set an event handler for the Opened and Closed events.

tooltip.Opened +=
  new RoutedEventHandler(whenToolTipOpens);
tooltip.Closed +=
  new RoutedEventHandler(whenToolTipCloses);

AddHandler tooltip.Opened, AddressOf whenToolTipOpens
AddHandler tooltip.Closed, AddressOf whenToolTipCloses


void whenToolTipOpens(object sender, RoutedEventArgs e)
{
    Ellipse ell = new Ellipse();
    if (sender.GetType().FullName.Equals("System.Windows.Shapes.Ellipse"))
    {
        ell = (Ellipse)sender;
        ell.Fill = Brushes.Blue;
    }
    else if (sender.GetType().FullName.Equals(
                             "System.Windows.Controls.ToolTip"))
    {
        ToolTip t = (ToolTip)sender;
        Popup p = (Popup)t.Parent;
        ell = (Ellipse)p.PlacementTarget;
        ell.Fill = Brushes.Blue;
    }
}

void whenToolTipCloses(object sender, RoutedEventArgs e)
{
    Ellipse ell = new Ellipse();
    if (sender.GetType().FullName.Equals(
                      "System.Windows.Shapes.Ellipse"))
    {
        ell = (Ellipse)sender;
        ell.Fill = Brushes.Gray;
    }
    else if (sender.GetType().FullName.Equals(
                           "System.Windows.Controls.ToolTip"))
    {
        ToolTip t = (ToolTip)sender;
        Popup p = (Popup)t.Parent;
        ell = (Ellipse)p.PlacementTarget;
        ell.Fill = Brushes.Gray;
    }
}


Private Sub whenToolTipOpens(ByVal sender As Object, ByVal e As RoutedEventArgs)
    Dim ell As New Ellipse()
    If sender.GetType().FullName.Equals("System.Windows.Shapes.Ellipse") Then
        ell = CType(sender, Ellipse)
        ell.Fill = Brushes.Blue
    ElseIf sender.GetType().FullName.Equals("System.Windows.Controls.ToolTip") Then
        Dim t As ToolTip = CType(sender, ToolTip)
        Dim p As Popup = CType(t.Parent, Popup)
        ell = CType(p.PlacementTarget, Ellipse)
        ell.Fill = Brushes.Blue
    End If
End Sub

Private Sub whenToolTipCloses(ByVal sender As Object, ByVal e As RoutedEventArgs)
    Dim ell As New Ellipse()
    If sender.GetType().FullName.Equals("System.Windows.Shapes.Ellipse") Then
        ell = CType(sender, Ellipse)
        ell.Fill = Brushes.Gray
    ElseIf sender.GetType().FullName.Equals("System.Windows.Controls.ToolTip") Then
        Dim t As ToolTip = CType(sender, ToolTip)
        Dim p As Popup = CType(t.Parent, Popup)
        ell = CType(p.PlacementTarget, Ellipse)
        ell.Fill = Brushes.Gray
    End If
End Sub

Remarks

The FrameworkElement.ToolTipOpening event is also raised when the ToolTip control opens.

Routed Event Information
Identifier field OpenedEvent
Routing strategy Bubbling
Delegate RoutedEventHandler

Applies to

See also