示例#1
0
        void DrawImageForPrint(object sender, PrintPageEventArgs e)
        {
            // Create the output settins
            SurfaceOutputSettings printOutputSettings = new SurfaceOutputSettings(OutputFormat.png, 100, false);

            ApplyEffects(printOutputSettings);

            Image image;
            bool  disposeImage = ImageOutput.CreateImageFromSurface(surface, printOutputSettings, out image);

            try {
                ContentAlignment alignment = conf.OutputPrintCenter ? ContentAlignment.MiddleCenter : ContentAlignment.TopLeft;

                // prepare timestamp
                float  footerStringWidth  = 0;
                float  footerStringHeight = 0;
                string footerString       = null;           //DateTime.Now.ToLongDateString() + " " + DateTime.Now.ToLongTimeString();
                if (conf.OutputPrintFooter)
                {
                    footerString = FilenameHelper.FillPattern(conf.OutputPrintFooterPattern, captureDetails, false);
                    using (Font f = new Font(FontFamily.GenericSansSerif, 10, FontStyle.Regular)) {
                        footerStringWidth  = e.Graphics.MeasureString(footerString, f).Width;
                        footerStringHeight = e.Graphics.MeasureString(footerString, f).Height;
                    }
                }

                // Get a rectangle representing the printable Area
                RectangleF pageRect = e.PageSettings.PrintableArea;
                if (e.PageSettings.Landscape)
                {
                    float origWidth = pageRect.Width;
                    pageRect.Width  = pageRect.Height;
                    pageRect.Height = origWidth;
                }

                // Subtract the dateString height from the available area, this way the area stays free
                pageRect.Height -= footerStringHeight;

                GraphicsUnit gu        = GraphicsUnit.Pixel;
                RectangleF   imageRect = image.GetBounds(ref gu);
                // rotate the image if it fits the page better
                if (conf.OutputPrintAllowRotate)
                {
                    if ((pageRect.Width > pageRect.Height && imageRect.Width < imageRect.Height) || (pageRect.Width < pageRect.Height && imageRect.Width > imageRect.Height))
                    {
                        image.RotateFlip(RotateFlipType.Rotate90FlipNone);
                        imageRect = image.GetBounds(ref gu);
                        if (alignment.Equals(ContentAlignment.TopLeft))
                        {
                            alignment = ContentAlignment.TopRight;
                        }
                    }
                }

                RectangleF printRect = new RectangleF(0, 0, imageRect.Width, imageRect.Height);
                // scale the image to fit the page better
                if (conf.OutputPrintAllowEnlarge || conf.OutputPrintAllowShrink)
                {
                    SizeF resizedRect = ScaleHelper.GetScaledSize(imageRect.Size, pageRect.Size, false);
                    if ((conf.OutputPrintAllowShrink && resizedRect.Width < printRect.Width) || conf.OutputPrintAllowEnlarge && resizedRect.Width > printRect.Width)
                    {
                        printRect.Size = resizedRect;
                    }
                }

                // align the image
                printRect = ScaleHelper.GetAlignedRectangle(printRect, new RectangleF(0, 0, pageRect.Width, pageRect.Height), alignment);
                if (conf.OutputPrintFooter)
                {
                    //printRect = new RectangleF(0, 0, printRect.Width, printRect.Height - (dateStringHeight * 2));
                    using (Font f = new Font(FontFamily.GenericSansSerif, 10, FontStyle.Regular)) {
                        e.Graphics.DrawString(footerString, f, Brushes.Black, pageRect.Width / 2 - (footerStringWidth / 2), pageRect.Height);
                    }
                }
                e.Graphics.DrawImage(image, printRect, imageRect, GraphicsUnit.Pixel);
            } finally {
                if (disposeImage && image != null)
                {
                    image.Dispose();
                    image = null;
                }
            }
        }