Hello everyone,

I am looking for some guidance and advice from you people here, I got a peculiar situation where I would like your help. Just hear out my situation first with patience. Your contribution/reply will be deeply appreciated.

I got a little self induced project work. Where I am to work in Real time linux (RT Linux - FIFO operation) - So I am using Red Hat 9 Shrike, have to use only Qt 3.1 (Yikes! I know - basically should work in Kernal 2.4) and should use Qwt in order to draw out graphs for scientific visualization - basically real-time plotting. And also please note that I cannot change on the tools I have to use here. Kind of obligatory.

Now my questions are :


1. For real-time plotting / visualization - Is there no other library or extension for Qt other than Qwt?

2. Which version of Qwt is most compatible and easy to work it ? Because Qwt 0.4.1 (4.1) and also I think Qwt 5.x support Qt3.x and above, Although I think I read that documentations of Qwt with Qt4.x + are only available. So can I use the Qwt 5.x for my project here, will it hinder or clash with support of Qt 3-1?

3. What's with the version of Qwt? Is Qwt(0.4.1) = Qwt 4.1 ? If so why? and Qwt 5.x or is it Qwt 0.5.1?? Little confused here.

4. I am using Qt Designer 3.1, is there a Qwt plugin for Qt Designer( Mind you - not Creator - Creator is not even available for Qt 3.1), If so then please help me on getting it on to my Designer. Was not able to do it today when I was fiddling around with Qwt 0.4.1.

5.Whats the BEST resources or tutorial for Qwt? I know Qwt has its own documentation, but its not lucid at all. Any one know other resources, although I squandered the Internet but couldn't come up with much.

6. I suppose Qt support OpenGL, Can it be used for real-time plotting ? Please accept my incompetence on understanding of OpenGL. All I know is that its used for rendering graphics, but I ask is, can it be used for plotting?

7.On running the examples of Qwt. I did install Qwt according to the ReadMe file included in it. But I am unable to run and compile the examples with...
Qt Code: 
  1. # qmake -project
  2. # qmake -o makefile testfile.pro
  3. # make clean
  4. # make
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Let me mention here - I did set TMAKE and LD_LIBRARY_PATH (whatever theie name were) to the /usr/qt3.1/lib folder.
And the problem that I am facing is when I try to make the .pro file using the qmake command its actually doesnt write the proper file as opposed to one already written when compiling and installing Qwt. So as a work around I used the .pro already generated and managed to compilethe examples. ( I will try and post the exact code in the .pro tomorrow, so maybe you will be able to help me better.)


That's all for now. I am really sorry to bandger my post with so many question, but as you can see that I had a very peculiar situation. And very little information is available over the Internet for Qt3.x, so I turning to your veterans here, Hope to get some replys.

Anyway if you feel that I should I opened different topic for each or maybe have posted this is wrong section. Please accept my humble apology.

With regards.