/// <summary>测试点击的位置（并设置SelectedPart值）</summary>
/// <param name="ctrls">需要测试的控制部件</param>
public void HitTest(PointF p, BazierPointPart ctrls = BazierPointPart.PrevControl | BazierPointPart.NextControl)
{
this.HitPart = BazierPointPart.None;
if (HitTestPoint(this.Point, p))
{
this.HitPart = BazierPointPart.Point;
}
if (ctrls.HasFlag(BazierPointPart.PrevControl) && HitTestPoint(this.PrevControl, p))
{
this.HitPart = BazierPointPart.PrevControl;
}
if (ctrls.HasFlag(BazierPointPart.NextControl) && HitTestPoint(this.NextControl, p))
{
this.HitPart = BazierPointPart.NextControl;
}
}
/// <summary>绘制贝塞尔曲线控制点</summary>
/// <param name="ctrls">要显示的控制点</param>
public void Draw(Graphics g, BazierPointPart ctrls = BazierPointPart.PrevControl | BazierPointPart.NextControl)
{
var pen = new Pen(Color.Black);
if (HitPart == BazierPointPart.None)
{
Painter.DrawDot(g, this.Point, Color.Black, false);
}
else
{
Painter.DrawDot(g, this.Point, Color.Black, HitPart == BazierPointPart.Point);
if (ctrls.HasFlag(BazierPointPart.PrevControl))
{
g.DrawLine(pen, this.Point, this.PrevControl);
Painter.DrawDot(g, this.PrevControl, Color.Black, HitPart == BazierPointPart.PrevControl);
}
if (ctrls.HasFlag(BazierPointPart.NextControl))
{
g.DrawLine(pen, this.Point, this.NextControl);
Painter.DrawDot(g, this.NextControl, Color.Black, HitPart == BazierPointPart.NextControl);
}
}
}
