/// <summary>Called when the <see cref="P:System.Windows.Controls.ContentControl.Content" /> property changes. </summary>
/// <param name="oldContent">The old value of the <see cref="P:System.Windows.Controls.ContentControl.Content" /> property.</param>
/// <param name="newContent">The new value of the <see cref="P:System.Windows.Controls.ContentControl.Content" /> property.</param>
// Token: 0x0600588F RID: 22671 RVA: 0x00188508 File Offset: 0x00186708
protected override void OnContentChanged(object oldContent, object newContent)
{
PopupControlService popupControlService = PopupControlService.Current;
if (this == popupControlService.CurrentToolTip && (bool)base.GetValue(PopupControlService.ServiceOwnedProperty) && newContent is ToolTip)
{
popupControlService.OnRaiseToolTipClosingEvent(null, EventArgs.Empty);
popupControlService.OnRaiseToolTipOpeningEvent(null, EventArgs.Empty);
return;
}
base.OnContentChanged(oldContent, newContent);
}
protected override void OnContentChanged(object oldContent, object newContent)
{
PopupControlService popupControlService = PopupControlService.Current;
// Whenever the tooltip for a control is not an instance of a ToolTip, the framework creates a wrapper
// ToolTip instance. Such a ToolTip is tagged ServiceOwned and its Content property is bound to the
// ToolTipProperty of the Owner element. So while such a ServiceOwned ToolTip is visible if the
// ToolTipProperty on the Owner changes to be a real ToolTip instance then it causes a crash
// complaining that the ServiceOwned ToolTip is wrapping another nested ToolTip. The condition here
// detects this case and merely dismisses the old ToolTip and displays the new ToolTip instead thus
// avoiding the use of a wrapper ToolTip.
if (this == popupControlService.CurrentToolTip &&
(bool)GetValue(PopupControlService.ServiceOwnedProperty) &&
newContent is ToolTip)
{
popupControlService.OnRaiseToolTipClosingEvent(null, EventArgs.Empty);
popupControlService.OnRaiseToolTipOpeningEvent(null, EventArgs.Empty);
}
else
{
base.OnContentChanged(oldContent, newContent);
}
}