CAD Viewer problem

[vitoluigi]

Hi,

it's the first time I write here. I implemented a CAD Viewer following the demo. All types of images are opened and the zoom is applied. But there are two problems: when I open an image dwg or dxf there are no colors and I can not interpret the letters that are replaced with strange symbols. What am I forgetting? Attach images to better understand the problem.

Immagine.png (26.34 KiB) Viewed 13542 times

Thanks for your help

[support]

Hello,

Could you please also attach the source code of your CAD Viewer for better understanding of the problem?

Mikhail

[vitoluigi]

Sure, for now place these functions that are the main ones

Code: Select all

public void LoadFile(string fileName)
        {
            _fileName = fileName;
       
            if (fileName != null)
            {
                if (cadImage != null)
                {
                    cadImage.Dispose();
                    cadImage = null;
                    //this.lForm.LayerList.Clear();
                }

                ImageScale = 1.0f;

                this.cadImage = CADImage.CreateImageByExtension(fileName);
                CADImport.CADConst.DefaultSHXParameters.UseSHXFonts = this.useSHXFonts;
                if (this.useSHXFonts)
                    DoSHXFonts();
                else
                    DoTTFFonts();
                this.cadImage.ChangeGraphicsMode(graphicsMode, renderMode);      
                this.cadImage.GraphicsOutMode = graphicsMode;
                this.cadImage.ChangeDrawMode(graphicsMode, cadPictBox);
                this.cadImage.ChangeGraphicsMode(graphicsMode, renderMode);
                if (this.cadImage is CADRasterImage)
                    (this.cadImage as CADRasterImage).Control = this.cadPictBox;
            }
            if (this.cadImage != null)
            {
                CADImage.CodePage = System.Text.Encoding.Default.CodePage;//note - charset was set here
                CADImage.LastLoadedFilePath = Path.GetDirectoryName(fileName);
                CreateNewLoadThread(fileName);
            }
        }

Code: Select all

private void LoadCADImage(object fileNameObj)
        {
            lock (cadImage)
            {
                string fileName = (string)fileNameObj;
                
                if (CADConst.IsWebPath(fileName))
                    this.cadImage.LoadFromWeb(fileName);
                else
                    cadImage.LoadFromFile(fileName);
            }
 
            SetCADImageOptions();
        }

Code: Select all

public void SetCADImageOptions()
        {
            cadImage.IsShowLineWeight = this.showLineWeight;
            cadImage.IsWithoutMargins = true;
            cadImage.UseDoubleBuffering = this.useDoubleBuffering;
            cadImage.TTFSmoothing = TTFSmoothing.None;
            this.useSelectEntity = false;

            if (cadPictBox.BackColor == Color.White)
                White_Click();
            else
                Black_Click();
                
            if (this.DrawMode == false)
                this.DoBlackColor();

            ObjEntity.cadImage = cadImage;
            ObjEntity.propGrid = this.propGrid;
            DoResize(true, true);
            this.cadPictBox.Invalidate();
        }

The rest of the functions are almost the same. If you need something more specific, ask.

[support]

Hello,

I have noticed that your code includes DoBlackColor() call, in the ViewerDemo project the given method renders the CAD image in black and white. To determine what rendering mode is currently used, you should check a CADImage.DrawMode property value which may be the following:

Code: Select all

    public enum CADDrawMode
    {
        //     All colors are shown.
        Normal = 0,
        //     CAD image is shown in black and white.
        Black = 1,
        //     CAD image is shown in grayscale.
        Gray = 2,
    } 

The problem with wrong characters may be connected with the usage of incorrect font. Please check what SHX and TTF fonts are required by the drawing file (for example, in AutoCAD). If you don't have AutoCAD, send the drawing file to the Technical Support e-mail, we will check it ourselves.

Mikhail