private bool HitTestDrawing(GeometryDrawing drawing, Point pt)
{
Pen pen = drawing.Pen;
Brush brush = drawing.Brush;
if (pen != null && brush == null)
{
if (drawing.Geometry.StrokeContains(pen, pt))
{
return true;
}
else
{
Geometry geometry = drawing.Geometry;
EllipseGeometry ellipse = null;
RectangleGeometry rectangle = null;
PathGeometry path = null;
if (TryCast.Cast(geometry, out ellipse))
{
if (ellipse.FillContains(pt))
{
return true;
}
}
else if (TryCast.Cast(geometry, out rectangle))
{
if (rectangle.FillContains(pt))
{
return true;
}
}
else if (TryCast.Cast(geometry, out path))
{
PathFigureCollection pathFigures = path.Figures;
int itemCount = pathFigures.Count;
if (itemCount == 1)
{
if (pathFigures[0].IsClosed && path.FillContains(pt))
{
return true;
}
}
else
{
for (int f = 0; f < itemCount; f++)
{
PathFigure pathFigure = pathFigures[f];
if (pathFigure.IsClosed)
{
PathFigureCollection testFigures = new PathFigureCollection();
testFigures.Add(pathFigure);
PathGeometry testPath = new PathGeometry();
testPath.Figures = testFigures;
if (testPath.FillContains(pt))
{
return true;
}
}
}
}
}
}
}
else if (brush != null && drawing.Geometry.FillContains(pt))
{
return true;
}
return false;
}
