Problem with qview/isis Qt libs

[akser25]

Hello,
I work at LROC, ASU under the supervision of Nick Avlonitis. We are trying to fix a problem with Qview (in ISIS 3.1.16/17), but have hit a deadend and unable to move further. I would appreciate your help in this matter.

The problem that we are having is that Qview (or any other application with GUI interface from the isis bin folder) doesn't seem to get stretched beyond a particular size on a 9-screen display that we use. Although it doesn't crash, it freezes if stretched beyond this point. Stretching it back to a smaller size, get's it working again.

I went through the code for Qview and its objects and I don't see a problem with it as far as resizing is concerned (resizing being handled by the QWidget class of the Qt library). Hence, one of the ways to confirm that the problem is indeed with Isis's Qt libs is by trying to run Qview with a different version of Qt or even a local build of the same version of Qt.

I tried to replace the libQtxxx.so.4.4.1 files (in the 3rd Party/lib folder) with copies of same files (which I found in an older 3.1.17 isis build). But, it's giving me the following error -

bash-3.2$ ./qview
./qview: error while loading shared libraries: libQtNetwork.so.4: wrong ELF class: ELFCLASS32

Both of these isis 3.1.17 releases (one downloaded today and one about 3 months back) are 64-bit versions run on Linux x86_64 architecture. While they work fine when run with their own 3rd Party libs, but as mentioned above, if the new ones are replaced with the 3-month older ones, it causes the above error.

I assume that Qt is being customized for ISIS. Is that correct? Because, other non-isis Qt widget applications seem to stretch just fine.
If not, is there a way that I can make Qview use my own Qt libs?

Thanks a lot for your time.
Amit

[cartrite]

I never tried to replace the 3rdParty libs with the 3month old libs that came with the older version of 3.1.17, so I can't say anything there as to why they cause an error for you. But I have replaced the QT4 libs with QT4 libs I built myself without any problems. In fact they fixed the problems I was having with the original QT4 libs. There are 20 files to replace. Here is the list of the files I replaced.

[akser25]

Actually, qview and qnet do work on my system. They cause a problem only when I try to stretch them beyond a certain size (when spanned across approx. 2x2 of the 3x3 screen arrangement).

I will try out your suggestion of using qt4.3.5 and see if it works for me.

[cartrite]

[akser25]

I tried using 4.4.3 and now I don't get the aforementioned error. But, the stretching problem still persists.

Now that it works with a different Qt, we are really unsure if it's the Qt that's causing the problem or if there's something in ISIS.

Anyone ever tried using ISIS apps on multiple screens?

[cartrite]

I never have. I'm not sure how to even do this. But it seems that it would have something to do with the graphics processing unit and how it is set up.
For example: Multi display mode and each with a virtual display bigger then the actual screen?
Did this work with older versions of ISIS?

cartrite