static void ProcesswaterMark(watermarkControl Holder, Size? fitTo = null)
{
if (Holder.ctrl.IsKeyboardFocused || !String.IsNullOrWhiteSpace(Holder.TextCheckDel(Holder.ctrl)))
{
Holder.ctrl.Background = System.Windows.Media.Brushes.White;
}
else
{
var element = new Grid
{
Background = System.Windows.Media.Brushes.White,
Margin = new Thickness(0),
};
if (null != fitTo)
{
element.Width = fitTo.Value.Width;
/*
* No need fit height
if (fitTo.Value.Width > 5)
element.Width = fitTo.Value.Width - 5;
if(fitTo.Value.Height > 5)
element.Height = fitTo.Value.Height -5;
*/
}
else
{
element.Width = Holder.ctrl.ActualWidth;
}
element.Children.Add(new Label
{
Margin = new Thickness(0),
Content = GetWaterMark(Holder.ctrl),
Foreground = System.Windows.Media.Brushes.LightGray,
//FontStyle = System.Windows.FontStyles.Italic,
Background = System.Windows.Media.Brushes.Transparent,
FontSize = 10,
Opacity = 0.8,
HorizontalAlignment = HorizontalAlignment.Left,
});
Holder.ctrl.Background = new VisualBrush
{
AlignmentX = AlignmentX.Left,
AlignmentY = AlignmentY.Center,
Stretch = Stretch.Fill,
Visual = element,
};
}
}
private static void onWaterMarkChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var holder = new watermarkControl
{
ctrl = d as Control
};
if (holder.ctrl is TextBox)
{
holder.TextCheckDel = (c)=> ((TextBox)c).Text;
((TextBox)holder.ctrl).TextChanged += (o1, e1) =>
{
ProcesswaterMark(holder);
};
}
else if (holder.ctrl is PasswordBox)
{
holder.TextCheckDel = (c) => ((PasswordBox)c).Password;
((PasswordBox)holder.ctrl).PasswordChanged += (o1, e1) =>
{
ProcesswaterMark(holder);
};
}
else
{
Debug.WriteLine("Not a valid control type");
return;
}
holder.ctrl.IsKeyboardFocusedChanged += (o1, e1) =>
{
ProcesswaterMark(holder);
};
holder.ctrl.SizeChanged += (o1, e1) =>
{
ProcesswaterMark(holder, e1.NewSize);
};
ProcesswaterMark(holder);
}
