private void ZoomAndRotate(GraphicLinkNode gln, MyGraphic relativeGraphic)
{
Matrix m1 = new Matrix();
Matrix m2 = new Matrix();
Matrix m3 = new Matrix();
double zoomScale = 1;
double preX1 = ((System.Windows.Shapes.Line)relativeGraphic.Shape).X1;
double preY1 = ((System.Windows.Shapes.Line)relativeGraphic.Shape).Y1;
double preX2 = ((System.Windows.Shapes.Line)relativeGraphic.Shape).X2;
double preY2 = ((System.Windows.Shapes.Line)relativeGraphic.Shape).Y2;
double nowX1 = preX1 + offset_x;
double nowY1 = preY1 + offset_y;
double nowX2 = preX2 + offset_x;
double nowY2 = preY2 + offset_y;
double preLength = MathTool.getInstance().distanceP2P(new StylusPoint(preX2, preY2), new StylusPoint(preX1, preY1));
double nowLength;
if (gln.Rule == "HeadIntersect")//修改第一个点
{
((System.Windows.Shapes.Line)relativeGraphic.Shape).X1 = nowX1;
((System.Windows.Shapes.Line)relativeGraphic.Shape).Y1 = nowY1;
if (relativeGraphic.ShapeType == "arrow" || relativeGraphic.ShapeType == "loopArc")
{
double angle1 = MathTool.getInstance().getAngleP2P(new StylusPoint(preX1, preY1), new StylusPoint(preX2, preY2));
double angle2 = MathTool.getInstance().getAngleP2P(new StylusPoint(nowX1, nowY1), new StylusPoint(preX2, preY2));
double angle = angle2 - angle1;//旋转角度
nowLength = MathTool.getInstance().distanceP2P(new StylusPoint(preX2, preY2), new StylusPoint(nowX1, nowY1));
if (preLength == 0 || nowLength == 0)
{
zoomScale = 1;
}
else
{
zoomScale = nowLength / preLength;
}
m1.RotateAt(-angle, preX2, preY2);
m2.ScaleAt(zoomScale, zoomScale, preX2, preY2);
Matrix m = m1 * m2;
relativeGraphic.Strokes[0].Transform(m, true);
relativeGraphic.Strokes[0].DrawingAttributes.StylusTipTransform = new Matrix(1, 0, 0, 1, 0, 0);
relativeGraphic.Strokes[1].Transform(m1, true);
if (relativeGraphic.Strokes.Count == 3)//笔迹数为3时
{
relativeGraphic.Strokes[2].Transform(m1, true);
}
}
}
else if (gln.Rule == "TailIntersect")//修改最后点
{
((System.Windows.Shapes.Line)relativeGraphic.Shape).X2 = nowX2;
((System.Windows.Shapes.Line)relativeGraphic.Shape).Y2 = nowY2;
if (relativeGraphic.ShapeType == "arrow" || relativeGraphic.ShapeType == "loopArc")
{
double angle1 = MathTool.getInstance().getAngleP2P(new StylusPoint(preX2, preY2), new StylusPoint(preX1, preY1));
double angle2 = MathTool.getInstance().getAngleP2P(new StylusPoint(nowX2, nowY2), new StylusPoint(preX1, preY1));
double angle = angle2 - angle1;//旋转角度
nowLength = MathTool.getInstance().distanceP2P(new StylusPoint(nowX2, nowY2), new StylusPoint(preX1, preY1));
if (preLength == 0 || nowLength == 0)
{
zoomScale = 1;
}
else
{
zoomScale = nowLength / preLength;
}
m1.RotateAt(-angle, preX1, preY1);
relativeGraphic.Strokes[0].Transform(m1, false);
m2.ScaleAt(zoomScale, zoomScale, preX1, preY1);
relativeGraphic.Strokes[0].Transform(m2, false);
//************************************
//用于计算箭头的头部移动位置
StylusPoint p = new StylusPoint(preX2, preY2);
StylusPointCollection ps = new StylusPointCollection();
ps.Add(p);
Stroke s = new Stroke(ps);
//*************************************
//箭的头部只旋转和移动，不缩放
if (relativeGraphic.Strokes.Count == 2)//笔迹数为2时
{
relativeGraphic.Strokes[1].Transform(m1, false);
s.Transform(m1, false);
m3.Translate(nowX2 - s.StylusPoints[0].X, nowY2 - s.StylusPoints[0].Y);
relativeGraphic.Strokes[1].Transform(m3, false);
}
else if (relativeGraphic.Strokes.Count == 3)//笔迹数为3时
{
relativeGraphic.Strokes[1].Transform(m1, false);
relativeGraphic.Strokes[2].Transform(m1, false);
s.Transform(m1, false);
m3.Translate(nowX2 - s.StylusPoints[0].X, nowY2 - s.StylusPoints[0].Y);
relativeGraphic.Strokes[1].Transform(m3, false);
relativeGraphic.Strokes[2].Transform(m3, false);
}
}
}
}
