Get X and Y position of mouse click on GDViewer

[hardikv]

Hi,

i have displayed one PDF file inside gdviewer control. gdviewer zmoo mode is selected by user it may be 100%, fixtowidth,fittiviewer etc.. it is not hardcode, any user can change zoom mode of GdViewer control.

i need to draw a line in displayed pdf of gdviewer. so i need exact starting position of mouse wit point and ending position of mouse with point to draw line.

Please provide me the detail and example of this problem.

[Loïc]

Hello,

- Catch X & Y in the mouse event. This will be viewer coordinates.
- Then translate viewer coordinates to document coordinates by using the CoordViewerToDocument method.

Kind regards,

Loïc

[hardikv]

Hello,

- Catch X & Y in the mouse event. This will be viewer coordinates.
- Then translate viewer coordinates to document coordinates by using the CoordViewerToDocument method.

Kind regards,

Loïc

Thanks Loic,

Can you please give me one sample code for this i have below code but it is not working.

Code: Select all

private void GdViewer1_MouseDown(object sender, MouseEventArgs e)
        {
                if (e.Button == MouseButtons.Left)
                {
                     isDrag = true;
                
                     int a = 0, b = 0;
                     GdViewer1.CoordDocumentToViewer(e.X, e.Y, ref a, ref b);
                     startPoint = new Point(a, b);
                  }
        }

in above example variable a and b return same result as e.X and e.y. so where is the problem.

Thanks

[Loïc]

I was talking about CoordViewerToDocument , not CoordDocumentToViewer.

Also, if you are dealing with PDF coordinates I will suggest you to convert them to inches:

Code: Select all

            int docXPix = 0, docYPix = 0;
            GdViewer1.CoordViewerToDocument(e.X, e.Y, ref docXPix, ref docYPix);

            double doXInches = docXPix / GdViewer1.HorizontalResolution ;
            double doYInches = docYPix / GdViewer1.VerticalResolution;

Hope this helps!

Loïc

[hardikv]

I was talking about CoordViewerToDocument , not CoordDocumentToViewer.

Also, if you are dealing with PDF coordinates I will suggest you to convert them to inches:

Code: Select all

            int docXPix = 0, docYPix = 0;
            GdViewer1.CoordViewerToDocument(e.X, e.Y, ref docXPix, ref docYPix);

            double doXInches = docXPix / GdViewer1.HorizontalResolution ;
            double doYInches = docYPix / GdViewer1.VerticalResolution;

Hope this helps!

Loïc

Thanks, it is working.

my main goal is to draw line on GDViewer using "AddLineAnnotation()" of GDPicture pdf class. but i have some problem in that. i have posted one thread on GDPicture forum. link is below. please help me to solve that problem also.


viewtopic.php?t=3844


Thanks

[SamiKharma]

Hi,

It has been answered. Please do not refer to other tickets in the forum in your posts. Your threads will be answered in due time.

Best Regards,
Sami