Ellipse() public méthode

public Ellipse ( IntPtr hdc, int nLeftRect, int nTopRect, int nRightRect, int nBottomRect ) : bool
hdc System.IntPtr
nLeftRect int
nTopRect int
nRightRect int
nBottomRect int
Résultat bool
Win32GDI Class Documentation
Exemple #1
0
        protected override bool OnExposeEvent(Gdk.EventExpose args)
        {
            using (Context cg = Gdk.CairoHelper.Create(args.Window))
            {
                Win32GDI GDI_Win32 = Win32GDI.getInstance();

                if (GDI_Win32.isAvailable())
                {
                    System.Drawing.Graphics wg = Gtk.DotNet.Graphics.FromDrawable(this.GdkWindow, true);
                    IntPtr hdc = wg.GetHdc();

                    int i = 0;
                    int n = 3;
                    int w = 16;
                    int h = 16;

                    Rect[] rects = new Rect[n];

                    /* Test Case 1 */
                    rects[i].x1 = 0;
                    rects[i].y1 = 0;
                    rects[i].x2 = w;
                    rects[i].y2 = h;
                    i++;

                    /* Test Case 2 */
                    rects[i].x1 = w * i + 3;
                    rects[i].y1 = 0;
                    rects[i].x2 = w * (i + 1) - 3;
                    rects[i].y2 = h;
                    i++;

                    /* Test Case 3 */
                    rects[i].x1 = w * i;
                    rects[i].y1 = 0 + 3;
                    rects[i].x2 = w * (i + 1);
                    rects[i].y2 = h - 3;
                    i++;

                    /* Fill Area with White */
                    cg.Color = new Cairo.Color(255, 255, 255);
                    Cairo.Rectangle rect = new Cairo.Rectangle(0, 0, n * w, h);
                    cg.Rectangle(rect);
                    cg.Fill();
                    cg.Stroke();

                    IntPtr blackSolidBrush = GDI_Win32.CreateSolidBrush(0);
                    IntPtr oldBrush        = GDI_Win32.SelectObject(hdc, blackSolidBrush);

                    for (i = 0; i < n; i++)
                    {
                        GDI_Win32.Ellipse(hdc, rects[i].x1, rects[i].y1, rects[i].x2, rects[i].y2);

                        dumpText += "unsigned char ellipse_case_" + (i + 1) + "[" + w * h + "] = \n";
                        dumpText += dumpPixelArea(GDI_Win32, hdc, i * w, 0, w, h) + "\n";
                    }
                }
            }
            return(true);
        }