private static TooltipPopup GetOrCreateTooltipPopup (FrameworkElement control)
{
var window = control.GetParent<Window>();
if (window == null)
return null;
TooltipPopup popup = GetTooltipPopup(window);
if (popup == null) {
popup = new TooltipPopup { Owner = window };
SetTooltipPopup(window, popup);
window.LocationChanged += UpdatePopup;
window.SizeChanged += UpdatePopup;
}
return popup;
}
private static TooltipPopup GetOrCreateTooltipPopup(FrameworkElement control)
{
var window = control.GetParent <Window>();
if (window == null)
{
return(null);
}
TooltipPopup popup = GetTooltipPopup(window);
if (popup == null)
{
popup = new TooltipPopup {
Owner = window
};
SetTooltipPopup(window, popup);
window.LocationChanged += UpdatePopup;
window.SizeChanged += UpdatePopup;
}
return(popup);
}
private static void UpdatePopup(object sender, EventArgs args)
{
var window = sender as Window;
FrameworkElement control;
if (window != null) // window change event, apply to previously validated control
{
control = GetCurrentValidatedControl(window);
}
else // validated control change event
{
control = (FrameworkElement)sender;
window = control.GetParent <Window>();
}
if (control == null) // no controls validated yet
{
return;
}
TooltipPopup popup = GetOrCreateTooltipPopup(window);
if (popup == null) // controls not yet loaded, can't get root window
{
return;
}
var icon = GetValidationIcon(control);
SetCurrentValidatedControl(window, control);
object message = GetMessage(icon);
if (icon == null || !control.IsKeyboardFocused ||
(message == null) ||
(message is string && ((string)message).IsNullOrEmpty()) ||
(message is IEnumerable <object> && !((IEnumerable <object>)message).Any()))
{
popup.Hide();
}
else
{
var pos = icon.PointToScreen(new Point(0, 0));
var popupContent = BindingOperations.GetBinding(popup, ContentControl.ContentProperty);
if (popupContent == null || !ReferenceEquals(popupContent.Source, icon))
{
BindingOperations.SetBinding(popup, ContentControl.ContentProperty,
new Binding {
Source = icon, Path = new PropertyPath(MessageProperty)
});
}
popup.Show();
if (pos.X + icon.ActualWidth + PopupPosDelta + popup.Width - TooltipPopup.ShadowMargin
<= SystemParameters.VirtualScreenTop + SystemParameters.VirtualScreenWidth)
{
popup.Left = pos.X + icon.ActualWidth + PopupPosDelta;
popup.Top = pos.Y - PopupPosDelta;
}
else
{
popup.Left = pos.X + icon.ActualWidth - popup.Width + TooltipPopup.ShadowMargin;
popup.Top = pos.Y + icon.ActualHeight + PopupPosDelta;
}
}
}
private static void SetTooltipPopup(Window d, TooltipPopup value)
{
d.SetValue(TooltipPopupProperty, value);
}
private static void SetTooltipPopup (Window d, TooltipPopup value)
{
d.SetValue(TooltipPopupProperty, value);
}