protected override Size MeasureOverride(Size availableSize)
{
var rect = new Rect();
var arc = new Arc(new Point(0, 0), this.MinAngle, this.MaxAngle, this.ReservedSpace / 2 + this.TickLength, this.IsDirectionReversed);
rect.Union(arc.GetPoint(arc.Start));
var a = TickHelper.ToAngle(this.Value, this.Minimum, this.Maximum, arc);
rect.Union(arc.GetPoint(a));
foreach (var p in arc.GetQuadrants(arc.Start, a))
{
rect.Union(p);
}
return rect.Size;
}
internal static Arc Fill(Size availableSize, double start, double end)
{
if (availableSize.Width == 0 ||
double.IsNaN(availableSize.Width) ||
availableSize.Height == 0 ||
double.IsNaN(availableSize.Height))
{
return new Arc(new Point(0, 0), start, end, 0, false);
}
var p0 = new Point(0, 0);
var arc = new Arc(p0, start, end, 1, false);
var rect = new Rect();
var ps = arc.GetPoint(start);
rect.Union(ps);
rect.Union(arc.GetPoint(end));
foreach (var quadrant in arc.GetQuadrants(start, end))
{
rect.Union(quadrant);
}
var wf = availableSize.Width / rect.Width;
var hf = availableSize.Height / rect.Height;
var r = Math.Min(wf, hf);
rect.Scale(r, r);
var v = rect.FindTranslationToCenter(availableSize);
return new Arc(p0 + v, start, end, r, false);
}
