QCustomPlot saveJpg not working on all computers

Tomax63

Hello all

I use QCustomPlot for diagrams and I am really happy with it. On my developing machines the export of Jpg does work fine. But on the PCs of my colleagues, it produces a 0byte file (but with correct name)

Has anyone met such a problem too?

Thomas

SGaist

Hi,

Did you deploy the application on your colleague's machine ?
If so how did you do it ?
Did you check that you have also the image formats plugins deployed ?

Tomax63

Hi thanks for such a quick response.

I have deployed the software by InnoSetup, including all the libraries. Are there special libraries needed for qcustomplot that I can include?

SGaist

Did you use windeployqt to prepare the files before making the installer with InnoSetup ?

Jpeg support has nothing to with QCustomPlot unless they wrote their own version.

Tomax63

I never heard of or used windeployqt.

That is new o me - I will try. Any tipps on how to make it easy fo a newbie?

Tomax63

I used it and it created some .ddl files. are those the ones I need to include in InnoSetup?

SGaist

If you put your executable in an empty folder and call windeplyoqt in it, it should give you a functional application with all dependencies needed that you can pack with InnoSetup.

Tomax63

That's what I did, but the saveJpeg still does not work.

windeployqt generated a lot of files which I completely included into the InnoSetup process and they all are installed.
Included are files like qjpeg.dll or qico.dll which I assume as the libraries that were missing.

Is there a chance to rtreive an error message when QCustomPlot can't export correctly because of a missing dll?

Tomax63

Do the imageformats/*.dll have to be in exactly that folder or in the system folder of windows?

SGaist

Don't put anything in the system folder, that's very bad practice.

The layout of the folders besides your application is described in the documentation I linked before.

windeployqt should be doing the right job in that regard.