GDI+ FillPolygon

[r9]

Can anyone show me how to fill this figure with a blue color? System.Drawing.Graphics formGraphics = null; System.Drawing.Pen myPen; formGraphics = pictureBox7.CreateGraphics(); myPen = new System.Drawing.Pen(System.Drawing.Color.Black,1); formGraphics.DrawLine(myPen, 4, 4, 50, 4); formGraphics.DrawLine(myPen, 4, 4, 4, 100); formGraphics.DrawLine(myPen, 50, 4, 50, 100); formGraphics.DrawLine(myPen, 4, 100, 27, 120); formGraphics.DrawLine(myPen, 50, 100, 27, 120); Maybe with the FillPolygon method.

[Valeria Bogdevich]

Point[] points = { new Point(4, 4), new Point(50, 4), new Point(50, 100), new Point(27, 120), new Point(4, 100), new Point(4, 4)}; SolidBrush brush = new SolidBrush(Color.Blue); e.Graphics.FillPolygon(brush, points, FillMode.Alternate); e.Graphics.DrawLines(myPen, points);

[r9]

WiB: Thanks. It works perfekt. How do you know in which order to put the Points?? Eks: Point[] points = { new Point(4, 4), new Point(50, 4), new Point(50, 100), new Point(27, 120), new Point(4, 4), new Point(4, 100)}; Won't fill the figure correkt.

[Valeria Bogdevich]

Because there is a rule: You put points in the same order like it would be if you draw figure by hand without break: you start from first point in array, draw line until second, after draw line from second point to third and so on to the last point. And normally I start and finish points array with the same point, but it's not allways necessary.

[r9]

Thanks again

[r9]

WiB: Is it possible to make the mouse cursor = Cursors.Hand if the the user point the mouse inside my figure ? formGraphics.DrawLine(myPen, 4, 4, 50, 4); formGraphics.DrawLine(myPen, 4, 4, 4, 100); formGraphics.DrawLine(myPen, 50, 4, 50, 100); formGraphics.DrawLine(myPen, 4, 100, 27, 120); formGraphics.DrawLine(myPen, 50, 100, 27, 120);

[Valeria Bogdevich]

1). In OnPaint: Point[] points = { new Point(4, 4), new Point(50, 4), new Point(50, 100), new Point(27, 120), new Point(4, 100), new Point(4, 4)}; GraphicsPath path = new GraphicsPath(); path.AddLines(points); Region reg = new Region(path); bounds = reg.GetBounds(e.Graphics); 2). Override OnMouseMove method as follow: protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs e) { if (bounds.Contains(e.X, e.Y)) this.Cursor = Cursors.Hand; else this.Cursor = Cursors.Default; base.OnMouseEnter(e); } RectangleF bounds is global This is if you want to draw a shape on a form. If your shape is a control on the form, you should do it by another way. PS: Because variable bounds you inisialize only once, you should do it, for example, in constructor or you may keep it in OnPaint but make sure that you initialize it once (performance!).

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