| public static Clamp ( double min, double max, double value ) : double | ||
| min | double | |
| max | double | |
| value | double | |
| return | double | |
public override void DrawPie(double fraction)
{
// Calculate the pie path
fraction = Theme.Clamp(0.0, 1.0, fraction);
double a1 = 3.0 * Math.PI / 2.0;
double a2 = a1 + 2.0 * Math.PI * fraction;
if (fraction == 0.0)
{
return;
}
Context.Cairo.MoveTo(Context.X, Context.Y);
Context.Cairo.Arc(Context.X, Context.Y, Context.Radius, a1, a2);
Context.Cairo.LineTo(Context.X, Context.Y);
// Fill the pie
Color color_a = Colors.GetWidgetColor(GtkColorClass.Background, StateType.Selected);
Color color_b = CairoExtensions.ColorShade(color_a, 1.4);
var fill = new RadialGradient(Context.X, Context.Y, 0,
Context.X, Context.Y, 2.0 * Context.Radius);
fill.AddColorStop(0, color_a);
fill.AddColorStop(1, color_b);
Context.Cairo.SetSource(fill);
Context.Cairo.FillPreserve();
fill.Dispose();
// Stroke the pie
Context.Cairo.SetSourceColor(CairoExtensions.ColorShade(color_a, 0.8));
Context.Cairo.LineWidth = Context.LineWidth;
Context.Cairo.Stroke();
}
public override void DrawPie(double fraction)
{
// Calculate the pie path
fraction = Theme.Clamp(0.0, 1.0, fraction);
double a1 = 3.0 * Math.PI / 2.0;
double a2 = a1 + 2.0 * Math.PI * fraction;
if (fraction == 0.0)
{
return;
}
Context.Cairo.MoveTo(Context.X, Context.Y);
Context.Cairo.Arc(Context.X, Context.Y, Context.Radius, a1, a2);
Context.Cairo.LineTo(Context.X, Context.Y);
// Fill the pie
Color color_a = CairoExtensions.GdkRGBAToCairoColor(
Widget.StyleContext.GetBackgroundColor(StateFlags.Selected));
Color color_b = CairoExtensions.ColorShade(color_a, 1.4);
RadialGradient fill = new RadialGradient(Context.X, Context.Y, 0,
Context.X, Context.Y, 2.0 * Context.Radius);
fill.AddColorStop(0, color_a);
fill.AddColorStop(1, color_b);
Context.Cairo.Pattern = fill;
Context.Cairo.FillPreserve();
fill.Destroy();
// Stroke the pie
Context.Cairo.Color = CairoExtensions.ColorShade(color_a, 0.8);
Context.Cairo.LineWidth = Context.LineWidth;
Context.Cairo.Stroke();
}
