I'm trying to replicate the nowadays so fashionable "reflex" effect on a controltemplate for buttons I'm creating.
The basic idea is to create a rectangle with a gradient fill from white to transparent and then clip some of that semi-transparent rectangle with a rectanglegeometry.
The problem is that I don't know how to define a relative rectangle geometry. I kind of worked around width by defining a large value (1000), but height is a problem. For example, it works good for buttons that have a 200 height, but doesn't do anything for smaller buttons.
Any ideas?
<Rectangle RadiusX="5" RadiusY="5" StrokeThickness="1" Stroke="Transparent">
<Rectangle.Fill>
<LinearGradientBrush StartPoint="0,0" EndPoint="0,0.55">
<GradientStop Color="#66ffffff" Offset="0.0" />
<GradientStop Color="Transparent" Offset="1.0" />
</LinearGradientBrush>
</Rectangle.Fill>
<Rectangle.Clip>
<RectangleGeometry Rect="0,0,1000,60" />
</Rectangle.Clip>
</Rectangle>
You could do this with a MultiBinding
and a new IMultiValueConverter
:
public class RectangleConverter : IMultiValueConverter
{
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
// you can pass in the value to divide by if you want
return new Rect(0, 0, (double)values[0], (double)values[1] / 3.33);
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
{
throw new NotSupportedException();
}
}
And used like so in your XAML:
<lcl:RectangleConverter x:Key="rectConverter" />
...
<RectangleGeometry>
<RectangleGeometry.Rect>
<MultiBinding Converter="{StaticResource rectConverter}">
<Binding Path="ActualWidth" RelativeSource="{RelativeSource AncestorType={x:Type Button}}" />
<Binding Path="ActualHeight" RelativeSource="{RelativeSource AncestorType={x:Type Button}}" />
</MultiBinding>
</RectangleGeometry.Rect>
</RectangleGeometry>