private void SetSourceFromProperty()
{
if (FrameworkElementService.GetIsFirstVisit(this))
{
var expression = this.GetBindingExpression(PropertyProperty);
if (expression != null && this.Source == null)
{
this.SetValue(Validator.SourceProperty, expression.DataItem as FrameworkElement);
}
}
}
private static void OnceLoaded(object sender, RoutedEventArgs e)
{
var element = sender as FrameworkElement;
var condition = FrameworkElementService.GetUnLoadedCondition(element);
if (condition.Condition())
{
condition.Action();
element.Loaded -= OnceLoaded;
element.ClearValue(FrameworkElementService.UnLoadedConditionProperty);
}
}
private static void TriggerElementPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
Validator validator = d as Validator;
if (FrameworkElementService.GetIsFirstVisit(validator.TriggerElement))
{
validator.RegisterTriggerValidationEvent();
FrameworkElementService.SetIsFirstVisit(validator.TriggerElement, false);
}
ValidationService.GetValidators(validator.TriggerElement).Add(validator);
}
protected static void ValidPropertyPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
Validator validator = d as Validator;
validator.SetSourceFromProperty();
if (validator.HasSourceContext)
{
UIThread.BeginInvoke(() =>
{
var isValid = validator.IsValid;
validator.IsValid = validator.InnerValidateWithError();
if (!isValid && !validator.IsValid && !FrameworkElementService.GetIsFirstVisit(validator))
{
validator.GapValidate();
}
}, DispatcherPriority.Normal);
}
else
{
validator.IsValid = true;
}
FrameworkElementService.SetIsFirstVisit(validator, false);
}
