public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
double percentage = (double)value;
GradientStop start = GradientStops.First();
GradientStop stop = GradientStops.Last();
foreach (GradientStop gradientStop in GradientStops)
{
if (start.Offset < gradientStop.Offset && gradientStop.Offset < percentage)
{
start = gradientStop;
}
if (percentage < gradientStop.Offset && gradientStop.Offset < stop.Offset)
{
stop = gradientStop;
}
}
return(new SolidColorBrush(Color.FromScRgb((float)((percentage - stop.Offset) * (start.Color.ScA - stop.Color.ScA) / (start.Offset - stop.Offset) + stop.Color.ScA),
(float)((percentage - stop.Offset) * (start.Color.ScR - stop.Color.ScR) / (start.Offset - stop.Offset) + stop.Color.ScR),
(float)((percentage - stop.Offset) * (start.Color.ScG - stop.Color.ScG) / (start.Offset - stop.Offset) + stop.Color.ScG),
(float)((percentage - stop.Offset) * (start.Color.ScB - stop.Color.ScB) / (start.Offset - stop.Offset) + stop.Color.ScB))));
}
void OnRemoveButtonClicked(object sender, EventArgs e)
{
if (gradientStops.Count <= 0)
{
return;
}
offsets--;
gradientStops.Remove(gradientStops.Last());
UpdateOffsets();
UpdateBackground();
}
void OnNewGradientRemoved(object sender, EventArgs e)
{
if (_gradientStops.Count <= 0)
{
return;
}
_offsets--;
_gradientStops.Remove(_gradientStops.Last());
UpdateOffsets(_gradientStops, _offsets);
UpdateBackground();
}