private static void ShowOverlayAdorner(DependencyObject targetElement, bool show, bool tryAgain)
{
var uiElement = targetElement as UIElement;
if (uiElement == null)
{
return;
}
var adornerLayer = AdornerLayer.GetAdornerLayer(uiElement);
if (adornerLayer == null)
{
if (tryAgain)
{
// try again later, perhaps giving layout a chance to create the adorner layer
targetElement.Dispatcher.BeginInvoke(
DispatcherPriority.Loaded,
new DispatcherOperationCallback(ShowAdornerOperation),
new object[] { targetElement, show });
}
return;
}
var adorner = uiElement.ReadLocalValue(ToolTipAdornerProperty) as OverlayAdorner;
if (show && adorner == null)
{
var overlayTemplate = GetOverlayTemplate(uiElement);
var toolTip = ToolTipService.GetToolTip(uiElement) as ToolTip;
adorner = new OverlayAdorner(uiElement, toolTip, overlayTemplate);
adornerLayer.Add(adorner);
uiElement.SetCurrentValue(ToolTipAdornerProperty, adorner);
}
else if (!show && adorner != null)
{
adorner.ClearChild();
adornerLayer.Remove(adorner);
uiElement.ClearValue(ToolTipAdornerProperty);
}
}
private static void ShowOverlayAdorner(DependencyObject targetElement, bool show, bool tryAgain)
{
var uiElement = targetElement as UIElement;
if (uiElement == null)
{
return;
}
var adornerLayer = AdornerLayer.GetAdornerLayer(uiElement);
if (adornerLayer == null)
{
if (tryAgain)
{
// try again later, perhaps giving layout a chance to create the adorner layer
targetElement.Dispatcher.BeginInvoke(DispatcherPriority.Loaded,
new DispatcherOperationCallback(ShowAdornerOperation),
new object[] { targetElement, show });
}
return;
}
var adorner = uiElement.ReadLocalValue(ToolTipAdornerProperty) as OverlayAdorner;
if (show && adorner == null)
{
var overlayTemplate = GetOverlayTemplate(uiElement);
var toolTip = ToolTipService.GetToolTip(uiElement) as ToolTip;
adorner = new OverlayAdorner(uiElement, toolTip, overlayTemplate);
adornerLayer.Add(adorner);
uiElement.SetValue(ToolTipAdornerProperty, adorner);
}
else if (!show && adorner != null)
{
adorner.ClearChild();
adornerLayer.Remove(adorner);
uiElement.ClearValue(ToolTipAdornerProperty);
}
}
