public static void RotateGraphicVisual(GraphicVisual graphicVisual, double angle, Point center)
{
RotateTransform tr = new RotateTransform(angle, center.X, center.Y);
graphicVisual.Origin = tr.Transform(graphicVisual.Origin);
graphicVisual.Angle += angle;
}
//public static void ScaleGraphicVisual(GraphicVisual graphicVisual, Vector scale, Point refer)
//{
// if (graphicVisual is GroupVisual)
// {
// throw new NotImplementedException();
// }
// else if (graphicVisual is GeomVisual)
// {
// Transform tr = new ScaleTransform(scale.X, scale.Y, refer.X, refer.Y);
// graphicVisual.Origin = tr.Transform(graphicVisual.Origin);
// Vector locScales = Func.VectorRotate(graphicVisual.Angle, scale.X, scale.Y);
// GeomVisual gv = graphicVisual as GeomVisual;
// IGeom geom = gv.Geom;
// GeomHelper.ScaleGeom(ref geom, locScales.X, locScales.Y);
// gv.Geom = geom;
// }
//}
public static void ScaleGraphicVisual(GraphicVisual graphicVisual, double scaleX, double scaleY, Point refer)
{
//ScaleTransform tr = new ScaleTransform(scaleX, scaleY, refer.X, refer.Y);
//graphicVisual.Origin = tr.Transform(graphicVisual.Origin);
if (graphicVisual is GroupVisual)
{
throw new NotImplementedException();
}
else if (graphicVisual is GeomVisual)
{
GeomVisual gv = graphicVisual as GeomVisual;
IGeom geom = gv.Geom;
Point localRefer = gv.Transform.Inverse.Transform(refer);
GeomHelper.ScaleGeom(ref geom, scaleX, scaleY, localRefer);
gv.Geom = geom;
}
}
/// <summary>
///
/// </summary>
public static DrawingGroup GetGraphicVisualDrawing(GraphicVisual graphicVisual)
{
var gp = graphicVisual as GroupVisual;
if (gp != null)
{
// GroupVisual 自身没有绘制（没有覆写OnRender方法）, 所以 GroupVisual 的 Drawing 为空（null）；
// 通过递归、遍历获取 GroupVisual 子级（Children）GraphicVisual 的 Drawing,
// 集合形成表示 GroupVisual 图形的 DrawingGroup
DrawingGroup drawingGroup = new DrawingGroup();
foreach (GraphicVisual gv in gp)
{
drawingGroup.Children.Add(GetGraphicVisualDrawing(gv));
}
return(drawingGroup);
}
else
{
return(graphicVisual.Drawing);
}
}
public static void MoveGraphicVisual(GraphicVisual graphicVisual, Vector delta)
{
graphicVisual.Origin += delta;
}