private void btnAddPoly_Click(object sender, EventArgs e)
{
if (ofdPolygon.ShowDialog(this) == DialogResult.Cancel)
{
return;
}
using (Stream input = ofdPolygon.OpenFile())
{
PolygonWrapper wrapper = new PolygonWrapper(ofdPolygon.FileName, PolygonFactory.Read(new StreamReader(input, Encoding.ASCII), true));
lbPolygons.Items.Add(wrapper);
_UpdatePictureBox();
}
}
private void _UpdatePictureBox()
{
if (pbDrawing.Image != null)
{
pbDrawing.Image.Dispose();
pbDrawing.Image = null;
}
if (lbPolygons.Items.Count == 0)
{
return;
}
IPolygon finalPolygon = ((PolygonWrapper)lbPolygons.Items[0]).Polygon;
bool first = true;
bool disposeIt = false;
foreach (Object obj in lbPolygons.Items)
{
if (first)
{
first = false;
continue;
}
PolygonWrapper wrapper = (PolygonWrapper)obj;
IPolygon oldPolygon = finalPolygon;
finalPolygon = finalPolygon.ClipPolygon(wrapper.Polygon, (ClipOp)cbClipOps.SelectedItem);
if (disposeIt)
{
oldPolygon.Dispose();
}
else
{
disposeIt = true;
}
}
GraphicsPath polyPath = finalPolygon.ToGraphicsPath(ContourType.All, GraphicsPathType.Polygons);
if (disposeIt)
{
finalPolygon.Dispose();
}
RectangleF bounds = polyPath.GetBounds();
if ((int)bounds.Width == 0 || (int)bounds.Height == 0)
{
pbDrawing.Image = null;
polyPath.Dispose();
return;
}
Matrix translateMatrix = new Matrix();
translateMatrix.Translate(bounds.X * -1.0f, bounds.Y * -1.0f);
polyPath.Transform(translateMatrix);
Image image = new Bitmap((int)bounds.Width, (int)bounds.Height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
using (Graphics bitmapGraphics = Graphics.FromImage(image))
{
bitmapGraphics.SmoothingMode = SmoothingMode.HighQuality;
bitmapGraphics.Clear(Color.LightBlue);
bitmapGraphics.FillPath(Brushes.LightGreen, polyPath);
using (Pen p = new Pen(Color.DarkGreen, Math.Max(Math.Max(bounds.Width, bounds.Height) * 0.0025f, 2)))
{
bitmapGraphics.DrawPath(p, polyPath);
p.Color = Color.DarkBlue;
bitmapGraphics.DrawRectangle(p, 0, 0, bounds.Width, bounds.Height);
}
}
polyPath.Dispose();
pbDrawing.Image = image;
}