private static double CalculateTrackOffset(MeteredSlider slider)
{
double arbitraryScalingFactor = 1.4; // don't like this!
double targetOffset = -slider.ActualHeight * slider.SliderPosition / arbitraryScalingFactor;
return(targetOffset);
}
private static double CalculateThumbSize(MeteredSlider slider)
{
double distanceFromCenter = Math.Abs(slider.SliderPosition - 0.5);
double angleInRadians = Math.Asin(2 * distanceFromCenter * 0.8);
double targetSize = Math.Cos(angleInRadians) * FullThumbHeight;
return(targetSize);
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
// The value input is not actually used (because the conversion uses properties of the slider, which comes in as the parameter
// input), but it should be the slider's Value property, which will force this calculation to be rerun at the right moments.
// The parameter input is a MeteredSlider control, or a FrameworkElement whose datacontext is a reference to the whole slider,
// either of which must be passed in using x:Reference because binding doesn't work on the parameter input.
MeteredSlider slider = (parameter as MeteredSlider) ?? (parameter as FrameworkElement)?.DataContext as MeteredSlider;
if (slider == null)
{
Console.WriteLine("The ModWheelConverters require, as a parameter, a FrameworkElement whose datacontext is a reference to the MeteredSlider control.");
return(FullThumbHeight);
}
double result = _conversion(slider);
return(result);
}
