protected virtual void OnRenderThumb(PaintThumbEventArgs e) { Graphics g = e.Graphics; Rectangle rect = e.ClipRectangle; ControlState state = e.ControlState; ThumbArrowDirection direction = ThumbArrowDirection.None; Color begin = ColorTable.ThumbBackNormal; Color end = ColorTable.TrackInnerBorder; Color border = ColorTable.ThumbBorderNormal; float mode = base.Orientation == Orientation.Horizontal ? 90f : 0f; switch (base.Orientation) { case Orientation.Horizontal: switch (base.TickStyle) { case TickStyle.None: case TickStyle.BottomRight: direction = ThumbArrowDirection.Down; break; case TickStyle.TopLeft: direction = ThumbArrowDirection.Up; break; case TickStyle.Both: direction = ThumbArrowDirection.None; break; } break; case Orientation.Vertical: switch (base.TickStyle) { case TickStyle.TopLeft: direction = ThumbArrowDirection.Left; break; case TickStyle.None: case TickStyle.BottomRight: direction = ThumbArrowDirection.Right; break; case TickStyle.Both: direction = ThumbArrowDirection.None; break; } break; } switch (state) { case ControlState.Hover: begin = ColorTable.ThumbBackHover; border = ColorTable.ThumbBorderHover; break; } using (SmoothingModeGraphics sg = new SmoothingModeGraphics(g)) { using (GraphicsPath path = GraphicsPathHelper.CreateTrackBarThumbPath( rect, direction)) { using (LinearGradientBrush brush = new LinearGradientBrush( rect, begin, end, mode)) { Blend blend = new Blend(); blend.Positions = new float[] { 0, .2f, .5f, .8f, 1f }; blend.Factors = new float[] { 1f, .7f, 0, .7f, 1f }; brush.Blend = blend; g.FillPath(brush, path); } using (Pen pen = new Pen(border)) { g.DrawPath(pen, path); } } rect.Inflate(-1, -1); using (GraphicsPath path = GraphicsPathHelper.CreateTrackBarThumbPath( rect, direction)) { using (Pen pen = new Pen(ColorTable.TrackInnerBorder)) { g.DrawPath(pen, path); } } } }