C# Rectangle.Inflate方法代码示例

            public Box(GroupSelector selector, int item)
            {
                bounds.Height = selector.background.Height;
                bounds.Y = selector.background.Y;
                bounds.X = selector.BoxX (item);
                bounds.Width = Math.Max (selector.BoxX (item + 1) - bounds.X, 1);

                if (item < 0 || item > selector.box_counts.Length - 1)
                    return;

                double percent = selector.box_counts [item] / (double) Math.Max (selector.box_count_max, 1);
                bar = bounds;
                bar.Height = (int) Math.Ceiling ((bounds.Height - selector.box_top_padding) * percent);
                bar.Y += bounds.Height - bar.Height - 1;

                bar.Inflate (- selector.box_spacing, 0);
            }

        private void InflateAndInvalidate(Rectangle passedRectangle)
        {
            //Create a new instance to preserve the passed Rectangle.
            Rectangle r = new Rectangle(passedRectangle.Location, passedRectangle.Size);

            r.Inflate(1, 1);
            PintaCore.Workspace.Invalidate(r);
        }

        /// <summary>
        /// Create a cursor icon with a shape that visually represents the tool's thickness.
        /// </summary>
        /// <param name="imgName">A string containing the name of the tool's icon image to use.</param>
        /// <param name="shape">The shape to draw.</param>
        /// <param name="shapeWidth">The width of the shape.</param>
        /// <param name="imgToShapeX">The horizontal distance between the image's top-left corner and the shape center.</param>
        /// <param name="imgToShapeX">The verical distance between the image's top-left corner and the shape center.</param>
        /// <param name="shapeX">The X position in the returned Pixbuf that will be the center of the shape.</param>
        /// <param name="shapeY">The Y position in the returned Pixbuf that will be the center of the shape.</param>
        /// <returns>The new cursor icon with an shape that represents the tool's thickness.</returns>
        protected Gdk.Pixbuf CreateIconWithShape(string imgName, CursorShape shape, int shapeWidth,
		                                          int imgToShapeX, int imgToShapeY,
		                                          out int shapeX, out int shapeY)
        {
            Gdk.Pixbuf img = PintaCore.Resources.GetIcon(imgName);

            double zoom = 1d;
            if (PintaCore.Workspace.HasOpenDocuments)
            {
                zoom = Math.Min(30d, PintaCore.Workspace.ActiveDocument.Workspace.Scale);
            }

            shapeWidth = (int)Math.Min(800d, ((double)shapeWidth) * zoom);
            int halfOfShapeWidth = shapeWidth / 2;

            // Calculate bounding boxes around the both image and shape
            // relative to the image top-left corner.
            Gdk.Rectangle imgBBox = new Gdk.Rectangle(0, 0, img.Width, img.Height);
            Gdk.Rectangle shapeBBox = new Gdk.Rectangle(
                imgToShapeX - halfOfShapeWidth,
                imgToShapeY - halfOfShapeWidth,
                shapeWidth,
                shapeWidth);

            // Inflate shape bounding box to allow for anti-aliasing
            shapeBBox.Inflate(2, 2);

            // To determine required size of icon,
            // find union of the image and shape bounding boxes
            // (still relative to image top-left corner)
            Gdk.Rectangle iconBBox = imgBBox.Union (shapeBBox);

            // Image top-left corner in icon co-ordinates
            int imgX = imgBBox.Left - iconBBox.Left;
            int imgY = imgBBox.Top - iconBBox.Top;

            // Shape center point in icon co-ordinates
            shapeX = imgToShapeX - iconBBox.Left;
            shapeY = imgToShapeY - iconBBox.Top;

            ImageSurface i = new ImageSurface(Format.ARGB32, iconBBox.Width, iconBBox.Height);
            using (Context g = new Context(i))
            {
                // Don't show shape if shapeWidth less than 3,
                if (shapeWidth > 3)
                {
                    int diam = Math.Max (1, shapeWidth - 2);
                    Cairo.Rectangle shapeRect = new Cairo.Rectangle(shapeX - halfOfShapeWidth,
                                                                     shapeY - halfOfShapeWidth,
                                                                     diam,
                                                                     diam);

                    Cairo.Color outerColor = new Cairo.Color (255, 255, 255, 0.5);
                    Cairo.Color innerColor = new Cairo.Color (0, 0, 0);

                    switch (shape)
                    {
                    case CursorShape.Ellipse:
                        g.DrawEllipse(shapeRect, outerColor, 1);
                        shapeRect = shapeRect.Inflate (-1, -1);
                        g.DrawEllipse(shapeRect, innerColor, 1);
                        break;
                    case CursorShape.Rectangle:
                        g.DrawRectangle(shapeRect, outerColor, 1);
                        shapeRect = shapeRect.Inflate (-1, -1);
                        g.DrawRectangle(shapeRect, innerColor, 1);
                        break;
                    }
                }

                // Draw the image
                g.DrawPixbuf(img, new Cairo.Point(imgX, imgY));
            }

            return CairoExtensions.ToPixbuf(i);
        }