private void Page_Loaded(object sender, RoutedEventArgs e)
{
AddRandomPoint();
AddRandomPoint();
AddRandomPoint();
// these are functions that sets different properties of drawn ellipses;
// these functions can be replaced by real, non-demo ones.
chart.AddPropertyBindingForNamedPart<Point>("ellipse", Ellipse.FillProperty, p =>
{
double hue = Math.Sin(1000 * (p.X + p.Y)) * 180 + 180;
var color = new HsbColor(hue, 0.2, 1);
return new SolidColorBrush(color.ToArgbColor()).MakeTransparent(0.7);
});
chart.AddPropertyBindingForNamedPart<Point>("ellipse", Ellipse.StrokeProperty, p =>
{
double hue = Math.Sin(1000 * (p.X + p.Y)) * 180 + 180;
var color = new HsbColor(hue, 1, 1);
return new SolidColorBrush(color.ToArgbColor());
});
chart.AddPropertyBindingForNamedPart<Point>("ellipse", Ellipse.RenderTransformProperty, p => new RotateTransform(120 * Math.Atan2(p.Y, p.X)));
chart.AddPropertyBinding<Point>(ViewportPanel.ViewportWidthProperty, p => 0.2 * Math.Abs(Math.Sin(p.X)));
chart.AddPropertyBinding<Point>(ViewportPanel.ViewportHeightProperty, p => 0.2 * Math.Abs(Math.Cos(p.X)));
DataContext = points;
}
/// <summary>
/// Creates color from HSB color space with random hue and saturation and brighness equal to 1.
/// </summary>
/// <returns></returns>
public static Color CreateColorWithRandomHue()
{
double hue = random.NextDouble() * 360;
HsbColor hsbColor = new HsbColor(hue, 1, 1);
return(hsbColor.ToArgbColor());
}
public static SolidColorBrush ChangeLightness(this SolidColorBrush brush, double lightnessFactor)
{
Color color = brush.Color;
HsbColor hsbColor = HsbColor.FromArgbColor(color);
hsbColor.Brightness *= lightnessFactor;
if (hsbColor.Brightness > 1.0)
{
hsbColor.Brightness = 1.0;
}
SolidColorBrush result = new SolidColorBrush(hsbColor.ToArgbColor());
return(result);
}
public static SolidColorBrush ChangeSaturation(this SolidColorBrush brush, double saturationFactor)
{
Color color = brush.Color;
HsbColor hsbColor = HsbColor.FromArgbColor(color);
hsbColor.Saturation *= saturationFactor;
if (hsbColor.Saturation > 1.0)
{
hsbColor.Saturation = 1.0;
}
SolidColorBrush result = new SolidColorBrush(hsbColor.ToArgbColor());
return(result);
}
/// <summary>
/// Creates color from HSB color space with random hue and saturation and brighness equal to 1.
/// </summary>
/// <returns></returns>
public static Color CreateColorWithRandomHue()
{
double hue = random.NextDouble() * 360;
HsbColor hsbColor = new HsbColor(hue, 1, 1);
return hsbColor.ToArgbColor();
}
