public override void OnValueChange(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
var passwordBox = sender as PasswordBox;
if (passwordBox == null)
{
return;
}
passwordBox.PasswordChanged -= PasswordBox_PasswordChanged;
if ((bool)e.NewValue)
{
HadTextProperty.SetValue(passwordBox);
passwordBox.PasswordChanged += PasswordBox_PasswordChanged;
}
}
private void PasswordBox_PasswordChanged(object sender, RoutedEventArgs e)
{
HadTextProperty.SetValue((PasswordBox)sender);
}