private void RemoveRandomGradientStop(RadialGradientBrush gradientBrush)
{
if (gradientBrush != null && gradientBrush.GradientStops.Count > 0)
{
gradientBrush.GradientStops.RemoveAt(_random.Next(0, gradientBrush.GradientStops.Count - 1));
}
}
public static WBrush ToBrush(this Brush brush)
{
if (brush == null)
{
return(null);
}
if (brush is SolidColorBrush solidColorBrush)
{
return(solidColorBrush.Color.ToBrush());
}
if (brush is LinearGradientBrush linearGradientBrush)
{
var orderedStops = linearGradientBrush.GradientStops.OrderBy(x => x.Offset).ToList();
var gradientStopCollection = new WGradientStopCollection();
foreach (var item in orderedStops)
{
gradientStopCollection.Add(new WGradientStop {
Offset = item.Offset, Color = item.Color.ToWindowsColor()
});
}
var p1 = linearGradientBrush.StartPoint;
var p2 = linearGradientBrush.EndPoint;
return(new WLinearGradientBrush(gradientStopCollection, 0)
{
StartPoint = new WPoint(p1.X, p1.Y),
EndPoint = new WPoint(p2.X, p2.Y)
});
}
#if UWP_18362
if (brush is RadialGradientBrush radialGradientBrush)
{
var wRadialGradientBrush = new WRadialGradientBrush()
{
Center = new WPoint(radialGradientBrush.Center.X, radialGradientBrush.Center.Y),
RadiusX = radialGradientBrush.Radius,
RadiusY = radialGradientBrush.Radius
};
var orderedStops = radialGradientBrush.GradientStops.OrderBy(x => x.Offset).ToList();
foreach (var gradientStop in orderedStops)
{
wRadialGradientBrush.GradientStops.Add(
new WGradientStop {
Color = gradientStop.Color.ToWindowsColor(), Offset = gradientStop.Offset
});
}
return(wRadialGradientBrush);
}
#endif
return(null);
}
private void ToggleMappingMode(RadialGradientBrush gradientBrush)
{
if (gradientBrush != null)
{
gradientBrush.MappingMode = ((gradientBrush.MappingMode == BrushMappingMode.RelativeToBoundingBox) ? BrushMappingMode.Absolute : BrushMappingMode.RelativeToBoundingBox);
RandomizeCenter(gradientBrush);
RandomizeRadius(gradientBrush);
RandomizeGradientOrigin(gradientBrush);
}
}
private void AddRandomGradientStop(RadialGradientBrush gradientBrush)
{
if (gradientBrush != null)
{
var stop = new GradientStop();
stop.Color = Color.FromArgb(Byte.MaxValue, (byte)_random.Next(256), (byte)_random.Next(256), (byte)_random.Next(256));
stop.Offset = _random.NextDouble();
gradientBrush.GradientStops.Add(stop);
}
}
public static WBrush?CreateBrush(this RadialGradientPaint radialGradientPaint)
{
var brush = new WRadialGradientBrush
{
Center = radialGradientPaint.Center.ToNative(),
RadiusX = radialGradientPaint.Radius,
RadiusY = radialGradientPaint.Radius
};
brush.GradientStops.AddRange(radialGradientPaint.GradientStops);
return(brush);
}
private void RandomizeCenter(RadialGradientBrush gradientBrush)
{
if (gradientBrush != null)
{
if (gradientBrush.MappingMode == BrushMappingMode.Absolute)
{
gradientBrush.Center = new Point(_random.Next(0, 100), _random.Next(0, 100));
}
else
{
gradientBrush.Center = new Point(_random.NextDouble(), _random.NextDouble());
}
}
}
private void RandomizeGradientOrigin(RadialGradientBrush gradientBrush)
{
if (gradientBrush != null)
{
if (gradientBrush.MappingMode == BrushMappingMode.Absolute)
{
gradientBrush.GradientOrigin = new Point(_random.Next(0, 100), _random.Next(0, 100));
}
else
{
gradientBrush.GradientOrigin = new Point(_random.Next(-100, 100) / 100f, _random.Next(-100, 100) / 100f);
}
}
}
private void RandomizeEllipseRadius(RadialGradientBrush gradientBrush)
{
if (gradientBrush != null)
{
if (gradientBrush.MappingMode == BrushMappingMode.Absolute)
{
gradientBrush.EllipseRadius = new Point(_random.Next(10, 200), _random.Next(10, 200));
}
else
{
gradientBrush.EllipseRadius = new Point(_random.NextDouble(), _random.NextDouble());
}
}
}
private void RandomizeRadius(RadialGradientBrush gradientBrush)
{
if (gradientBrush != null)
{
if (gradientBrush.MappingMode == BrushMappingMode.Absolute)
{
gradientBrush.RadiusX = _random.Next(10, 200);
gradientBrush.RadiusY = _random.Next(10, 200);
}
else
{
gradientBrush.RadiusX = _random.NextDouble();
gradientBrush.RadiusY = _random.NextDouble();
}
}
}
private void ReplaceGradientButton_Click(object sender, RoutedEventArgs e)
{
DynamicGradientBrush = new RadialGradientBrush();
DynamicGradientBrush.FallbackColor = Color.FromArgb(Byte.MaxValue, (byte)_random.Next(256), (byte)_random.Next(256), (byte)_random.Next(256));
// Set brush before adding stops
RectangleWithDynamicGradient.Fill = DynamicGradientBrush;
DynamicGradientBrush.GradientStops.Clear();
for (int i = 0; i < _random.Next(2, 5); i++)
{
AddRandomGradientStop(DynamicGradientBrush);
}
// Set brush after adding stops
TextBlockWithDynamicGradient.Foreground = DynamicGradientBrush;
Bindings.Update();
}
