Printing

[roman]

Hello,

the following Code prints the selected part of an image (best is a rectangle). Printing works good, but the CadImage in the CADEditorControl is deformed after saving the image to the stream. (The size and position of the original image changes, so the display is not correct anymore)

Everything works well until the method

Code: Select all

 img.SaveToStream(ms, ImageFormat.Jpeg, drawingSize, rasterSize);

is called. When the code returns the image dimensions are changed.

Thank you for your help.


Here is my code, you can copy it into the CADEditorControlDemo. I used a contextmenu to invoke the PrintSelection_Click event.

Code: Select all

private void PrintSelection_Click(object sender, EventArgs e)
        {
            var img = cadEditorControl.Image;

            if (img.SelectEntitiesCount < 1)
            {
                return;
            }

            CADEntity ent = img.SelectedEntities[0];

            double ratio = ent.Box.Width / ent.Box.Height;
            DRect rasterSize = new DRect(0, 0, 1000, 1000 / ratio);

            double widened = 1000 / ent.Box.Width;

            double tmpleft = -Math.Abs(img.PureExtents.left - ent.Box.left) * widened;
            double tmptop = -Math.Abs(ent.Box.top - img.PureExtents.top) * widened;

            DRect drawingSize = new DRect(tmpleft, tmptop, tmpleft + img.PureExtents.Width * widened, tmptop - img.PureExtents.Height * widened);

            using (var ms = new MemoryStream())
            {
                
                img.SaveToStream(ms, ImageFormat.Jpeg, drawingSize, rasterSize);

                ms.Flush();
                ms.Position = 0;
                var bmp = Image.FromStream(ms);

                CadPrinter.Print(bmp);
            }
}

public class CadPrinter
{
    public Image PrintImage { get; set; }
    PrintDocument printDocument = null;
    PrintPreviewDialog printPreviewDialog = new PrintPreviewDialog();

    private CadPrinter()
    {
        SetupPrint();


    }

    private void SetupToolbox()
    {
        ToolStrip ts = (ToolStrip)printPreviewDialog.Controls[1];
        ToolStripButton oldPrintButton = (ToolStripButton)ts.Items[0];
        ts.Items.Remove(oldPrintButton);
        ToolStripButton printButton = new ToolStripButton();
        printButton.ImageIndex = oldPrintButton.ImageIndex;
        printButton.Visible = true;
        ts.Items.Insert(0, printButton);
        printButton.Click += new System.EventHandler(printButton_Click);

        ToolStripComboBox cb = new ToolStripComboBox("cbOrientation");
        cb.Items.Add("Hochformat");
        cb.Items.Add("Querformat");
        cb.SelectedIndexChanged += new System.EventHandler(cb_SelectedIndexChanged);
        cb.SelectedIndex = 0;
        ts.Items.Insert(1, cb);
    }

    private static Image GetPrintImage(CADImage img, DRect box)
    {

        using (var ms = new MemoryStream())
        {
            double ratio = box.Width / box.Height;
            DRect rasterSize = new DRect(0, 0, 1000, 1000 / ratio);

            double widened = 1000 / box.Width;

            double tmpleft = -Math.Abs(img.PureExtents.left - box.left) * widened;
            double tmptop = -Math.Abs(box.top - img.PureExtents.top) * widened;
            
            DRect drawingSize = new DRect(tmpleft, tmptop, tmpleft + img.PureExtents.Width * widened, tmptop - img.PureExtents.Height * widened);

            img.SaveToStream(ms, ImageFormat.Jpeg, drawingSize, rasterSize);

            ms.Flush();
            ms.Position = 0;

            return System.Drawing.Image.FromStream(ms);
        }
    }

    public static void Print(CADImage img, DRect selection)
    {

        Print(GetPrintImage(img, selection));
    }

    public static void Print(Image bmp)
    {
        CadPrinter printer = new CadPrinter();
        printer.PrintImage = bmp;
        printer.Print();
    }



    private void Print()
    {
        SetupPrint();

        try
        {
            SetupToolbox();
            printPreviewDialog.ShowDialog();

        }
        catch (Exception e1)
        {
            MessageBox.Show(string.Format("{0}", e1.Message), "Elitec Software", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }
    }

    private void SetupPrint()
    {
        printPreviewDialog.ShowIcon = false;
        printDocument = new PrintDocument();
        printDocument.BeginPrint += new PrintEventHandler(printDocument_BeginPrint);
        printDocument.PrintPage += new PrintPageEventHandler(printDocument_PrintPage);
        printDocument.EndPrint += new PrintEventHandler(printDocument_EndPrint);
        printPreviewDialog.Document = printDocument;
        SetupToolbox();
    }

    void cb_SelectedIndexChanged(object sender, EventArgs e)
    {

        printDocument.DefaultPageSettings.Landscape = ((ToolStripComboBox)sender).SelectedItem.Equals("Querformat");
        printPreviewDialog.Document = printDocument;

        printPreviewDialog.Refresh();

    }

    void printButton_Click(object sender, EventArgs e)
    {
        PrintDialog pd = new PrintDialog();
        pd.Document = printDocument;
        if (pd.ShowDialog() == DialogResult.Cancel)
        {
            return;
        }
        else
        {
            printDocument.Print();
        }
    }

    void printDocument_EndPrint(object sender, PrintEventArgs e)
    {
        printDocument.Dispose();
    }


    void printDocument_PrintPage(object sender, PrintPageEventArgs e)
    {
        Graphics g = e.Graphics;
        g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
        g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;

        Rectangle printSize = e.MarginBounds;

        if ((double)PrintImage.Width / (double)PrintImage.Height > (double)printSize.Width / (double)printSize.Height) // image is wider
        {
            printSize.Height = (int)((double)PrintImage.Height / (double)PrintImage.Width * (double)printSize.Width);
        }
        else
        {
            printSize.Width = (int)((double)PrintImage.Width / (double)PrintImage.Height * (double)printSize.Height);
        }
        e.Graphics.DrawImage(PrintImage, printSize);

        int width = (int)(printDocument.DefaultPageSettings.PrinterResolution.X * printDocument.DefaultPageSettings.PrintableArea.Width / 100);
        int height = (int)(printDocument.DefaultPageSettings.PrinterResolution.Y * printDocument.DefaultPageSettings.PrintableArea.Height / 100);

        // set landscape
        if (printDocument.DefaultPageSettings.Landscape)
        {
            int tmp = width;
            width = height;
            height = tmp;
        }


    }

    void printDocument_BeginPrint(object sender, PrintEventArgs e)
    {

        if (e.PrintAction == PrintAction.PrintToPreview)
        {
            printDocument.OriginAtMargins = true;
            printDocument.DefaultPageSettings.Margins = new System.Drawing.Printing.Margins(50, 50, 50, 50);

        }
        else
        {
            printDocument.OriginAtMargins = false;
        }
    }
}

[support]

Hello Roman,

Please specify the exact CADImport.dll build number and post a screenshot that demonstrates the given problem.


Mikhail

[roman]

Hello,
the version is 10.2.20.51120

best regards,
Roman

[roman]

Hi,

I just upgraded to the CADEditorControl V11. This seems to work!

Thank you!

[support]

Hello Roman,

Thank you for the information. I couldn't reproduce this problem using the version 11.


Mikhail