C# Cairo.Context.Rectangle方法代码示例

		void DrawBrush (double x, double y)
		{
			using (Cairo.Context ctx = new Cairo.Context (surface)) {
				ctx.Rectangle ((int) x - 3, (int) y - 3, 6, 6);
				ctx.Fill ();
			}

			QueueDrawArea ((int) x - 3, (int) y - 3, 6, 6);
		}

				public BgBufferUpdate (Minimpap mode)
				{
					this.mode = mode;
					
					cr = Gdk.CairoHelper.Create (mode.backgroundBuffer);
					
					cr.LineWidth = 1;
					int w = mode.backgroundBuffer.ClipRegion.Clipbox.Width;
					int h = mode.backgroundBuffer.ClipRegion.Clipbox.Height;
					cr.Rectangle (0, 0, w, h);
					if (mode.TextEditor.ColorStyle != null)
						cr.Color = mode.TextEditor.ColorStyle.Default.CairoBackgroundColor;
					cr.Fill ();
					
					maxLine = mode.TextEditor.GetTextEditorData ().VisibleLineCount;
					sx = w / (double)mode.TextEditor.Allocation.Width;
					sy = Math.Min (1, lineHeight * maxLine / (double)mode.TextEditor.GetTextEditorData ().TotalHeight );
					cr.Scale (sx, sy);
					
					handler = GLib.Idle.Add (BgBufferUpdater);
				}

        private void OnWidgetDestroyed(object sender, EventArgs args)
        {
            if (!IsRealized) {
                return;
            }

            // Copy the widget's pixels to surface, we'll use it to draw the animation
            surface = Window.CreateSimilarSurface (Cairo.Content.ColorAlpha, widget_alloc.Width, widget_alloc.Height);
            using (var cr = new Cairo.Context (surface)) {
                Gdk.CairoHelper.SetSourceWindow (cr, Window, widget_alloc.X, widget_alloc.Y);
                cr.Rectangle (0, 0, widget_alloc.Width, widget_alloc.Height);
                cr.Fill ();

                if (AnimationState != AnimationState.Going) {
                    WidgetDestroyed (this, args);
                }

            }
        }

            void OnConfigured(object o, ConfigureEventArgs args)
            {
                pixmap = new Pixmap (args.Event.Window,
                             Allocation.Width,
                             Allocation.Height);
                cairo = Gdk.CairoHelper.Create (pixmap);
                cairo.Rectangle (0, 0,
                         Allocation.Width,
                         Allocation.Height);
                cairo.Clip ();

                ArrayList oldlist = points;
                points = new ArrayList ();

                ComputePositions ();
                foreach (GraphPoint point in oldlist)
                {
                    __AddGameInfo (point.info);
                }

                UpdatePixmap ();
            }

        internal static Gdk.Pixbuf CreateBitmap(string stockId, double width, double height, double scaleFactor)
        {
            Gdk.Pixbuf result = null;

            Gtk.IconSet iconset = Gtk.IconFactory.LookupDefault (stockId);
            if (iconset != null) {
                // Find the size that better fits the requested size
                Gtk.IconSize gsize = Util.GetBestSizeFit (width);
                result = iconset.RenderIcon (Gtk.Widget.DefaultStyle, Gtk.TextDirection.Ltr, Gtk.StateType.Normal, gsize, null, null, scaleFactor);
                if (result == null || result.Width < width * scaleFactor) {
                    var gsize2x = Util.GetBestSizeFit (width * scaleFactor, iconset.Sizes);
                    if (gsize2x != Gtk.IconSize.Invalid && gsize2x != gsize)
                        // Don't dispose the previous result since the icon is owned by the IconSet
                        result = iconset.RenderIcon (Gtk.Widget.DefaultStyle, Gtk.TextDirection.Ltr, Gtk.StateType.Normal, gsize2x, null, null);
                }
            }

            if (result == null && Gtk.IconTheme.Default.HasIcon (stockId))
                result = Gtk.IconTheme.Default.LoadIcon (stockId, (int)width, (Gtk.IconLookupFlags)0);

            if (result == null)
            {
                // render a custom gtk-missing-image icon
                // if Gtk.Stock.MissingImage is not found
                int w = (int)width;
                int h = (int)height;
                #if XWT_GTK3
                Cairo.ImageSurface s = new Cairo.ImageSurface(Cairo.Format.ARGB32, w, h);
                Cairo.Context cr = new Cairo.Context(s);
                cr.SetSourceRGB(255, 255, 255);
                cr.Rectangle(0, 0, w, h);
                cr.Fill();
                cr.SetSourceRGB(0, 0, 0);
                cr.LineWidth = 1;
                cr.Rectangle(0.5, 0.5, w - 1, h - 1);
                cr.Stroke();
                cr.SetSourceRGB(255, 0, 0);
                cr.LineWidth = 3;
                cr.LineCap = Cairo.LineCap.Round;
                cr.LineJoin = Cairo.LineJoin.Round;
                cr.MoveTo(w / 4, h / 4);
                cr.LineTo((w - 1) - w / 4, (h - 1) - h / 4);
                cr.MoveTo(w / 4, (h - 1) - h / 4);
                cr.LineTo((w - 1) - w / 4, h / 4);
                cr.Stroke();
                result = Gtk3Extensions.GetFromSurface(s, 0, 0, w, h);
                #else
                using (Gdk.Pixmap pmap = new Gdk.Pixmap (Gdk.Screen.Default.RootWindow, w, h))
                using (Gdk.GC gc = new Gdk.GC (pmap)) {
                    gc.RgbFgColor = new Gdk.Color (255, 255, 255);
                    pmap.DrawRectangle (gc, true, 0, 0, w, h);
                    gc.RgbFgColor = new Gdk.Color (0, 0, 0);
                    pmap.DrawRectangle (gc, false, 0, 0, (w - 1), (h - 1));
                    gc.SetLineAttributes (3, Gdk.LineStyle.Solid, Gdk.CapStyle.Round, Gdk.JoinStyle.Round);
                    gc.RgbFgColor = new Gdk.Color (255, 0, 0);
                    pmap.DrawLine (gc, (w / 4), (h / 4), ((w - 1) - (w / 4)), ((h - 1) - (h / 4)));
                    pmap.DrawLine (gc, ((w - 1) - (w / 4)), (h / 4), (w / 4), ((h - 1) - (h / 4)));
                    result = Gdk.Pixbuf.FromDrawable (pmap, pmap.Colormap, 0, 0, 0, 0, w, h);
                }
                #endif
            }
            return result;
        }