/// <summary>
/// 根据ptA, ptB的坐标调整line坐标，主要用于裁剪掉位于线框内部的线段
/// </summary>
/// <param name="ptA">D1的坐标</param>
/// <param name="ptB">D2的坐标</param>
/// <param name="line">连接D1,D2的连线</param>
protected void AdjustLinkPosition(Link link)
{
Rect rtA = link.SrcDevice.GetPosition();
Rect rtB = link.DstDevice.GetPosition();
Point ptA = new Point(rtA.Left + link.PTSrcOffset.X, rtA.Top + link.PTSrcOffset.Y);
Point ptB = new Point(rtB.Left + link.PTDstOffset.X, rtB.Top + link.PTDstOffset.Y);
Line l = Util.Function.CalCrossPoint(ptA, ptB, rtA, rtB);
link.PTSRC = new Point(l.X1, l.Y1);
link.PTDST = new Point(l.X2, l.Y2);
link.adjustTextPosition();
}
