protected override void OnPaint(PaintEventArgs pe)
{
base.OnPaint(pe);
if (PieData == null)
{
return;
}
pe.Graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
pe.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
RectangleF baseRect = new RectangleF((PieWidth + BoundaryWidth) / 2, (PieWidth + BoundaryWidth) / 2, Height - 1 - PieWidth - BoundaryWidth, Height - 1 - PieWidth - BoundaryWidth);
PointF startPoint, endPoint;
float startAngle = 0;
BoundaryPen = new Pen(BoundaryColor, BoundaryWidth);
// TO PREVENT ABSURD BEHAVIOUR WHILE ANIMATING
if (isSum100)
{
// LAST SEGMENT
pe.Graphics.FillPie(new SolidBrush(PieData.Last().Color), BoundaryWidth / 2, BoundaryWidth / 2, Height - 1 - BoundaryWidth, Height - 1 - BoundaryWidth, 0, 360);
pe.Graphics.DrawArc(BoundaryPen, GetOuterBoundaryRect(baseRect), 0, 360);
if (!FillPie)
{
pe.Graphics.DrawArc(BoundaryPen, GetInnerBoundaryRect(baseRect), 0, 360);
}
}
// DRAW PIE
foreach (PieData pieData in PieData)
{
float sweepAngle = (pieData.Percent / 100) * animationAngle;
if (startAngle + sweepAngle > 360)
{
sweepAngle = 360 - startAngle;
}
pe.Graphics.FillPie(new SolidBrush(pieData.Color), BoundaryWidth / 2, BoundaryWidth / 2, Height - 1 - BoundaryWidth, Height - 1 - BoundaryWidth, startAngle, sweepAngle);
startAngle += sweepAngle;
}
// DRAW BOUNDARIES
DrawAllBoundaries(pe.Graphics, baseRect);
// LAST SEGMENT INNER AND OUTER BOUNDARY CONNECTOR
if (BoundaryWidth > 0 && !isSum100)
{
GetPieSegmentCornerPoints(startAngle, out startPoint, out endPoint);
pe.Graphics.DrawLine(BoundaryPen, startPoint, endPoint);
}
// MAKE CENTER WHITE
if (!FillPie)
{
pe.Graphics.FillPie(Brushes.White, PieWidth + BoundaryWidth, PieWidth + BoundaryWidth, 2 * ((Height - 1) / 2 - PieWidth - BoundaryWidth), 2 * ((Height - 1) / 2 - PieWidth - BoundaryWidth), 0, 360);
}
DrawValuesOnPie(pe.Graphics, baseRect.Height / 2);
DrawLegends(pe.Graphics);
}