protected bool detectLabelOverlap(GraphPane pane, Graphics g, TextObj text, out Region textBoundsRegion, IPointList points, int pointIndex, bool pointsAreSticks)
{
string shape, coords;
text.GetCoords(pane, g, 1.0f, out shape, out coords);
if (shape != "poly")
{
throw new InvalidOperationException("shape must be 'poly'");
}
string[] textBoundsPointStrings = coords.Split(",".ToCharArray());
if (textBoundsPointStrings.Length != 9)
{
throw new InvalidOperationException("coords length must be 8");
}
Point[] textBoundsPoints = new[]
{
new Point(Convert.ToInt32(textBoundsPointStrings[0]), Convert.ToInt32(textBoundsPointStrings[1])),
new Point(Convert.ToInt32(textBoundsPointStrings[2]), Convert.ToInt32(textBoundsPointStrings[3])),
new Point(Convert.ToInt32(textBoundsPointStrings[4]), Convert.ToInt32(textBoundsPointStrings[5])),
new Point(Convert.ToInt32(textBoundsPointStrings[6]), Convert.ToInt32(textBoundsPointStrings[7]))
};
byte[] textBoundsPointTypes = new[]
{
(byte)PathPointType.Start,
(byte)PathPointType.Line,
(byte)PathPointType.Line,
(byte)PathPointType.Line
};
GraphicsPath textBoundsPath = new GraphicsPath(textBoundsPoints, textBoundsPointTypes);
textBoundsPath.CloseFigure();
textBoundsRegion = new Region(textBoundsPath);
textBoundsRegion.Intersect(pane.Chart.Rect);
RectangleF[] textBoundsRectangles = textBoundsRegion.GetRegionScans(g.Transform);
for (int j = 0; j < textBoundsRectangles.Length; ++j)
{
if (IsVisibleToClip(g, textBoundsRectangles[j]))
{
return(true);
}
}
return(false);
}