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Qt5 or Qt4?

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  • EddyE Offline
    EddyE Offline
    Eddy
    wrote on last edited by
    #1

    We all expect questions in the future about Qt5.
    There will be a twilight zone : some people remain on Qt4 and others go straight ahead for Qt5.

    But people tend to forget telling us what version they are using. So I tought it would be a good idea to have a way of distinguishing this for instance in the "post a new topic" page where you could mark some radiobuttons and without marking it it is not possible to submit your post.

    What do you all think of this? Or are there better places to do this?

    Qt Certified Specialist
    www.edalsolutions.be

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    • K Offline
      K Offline
      kamalakshantv
      wrote on last edited by
      #2

      It depends on the requirement too. I read somewhere that Qt5 won't be supported for Symbian devices. If this comes true as rumored then mobile developers have no option but to stick with Qt 4.

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      • EddyE Offline
        EddyE Offline
        Eddy
        wrote on last edited by
        #3

        Yes, knowing the target is usefull and sometimes required. In your case you could post a question about symbian and mark the Qt4 radiobutton.

        Corrrect me if i'm wrong but symbian users have a good habit telling us they are on symbian when posting questions.

        Maybe it would be better to use subforums for distinguising targets.There has been a discussion in the past and the decision was to make only one mobility subforum not one for meego, symbian and so on. I think that's another discussion....that has been dealed with and is closed.

        Qt Certified Specialist
        www.edalsolutions.be

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        • D Offline
          D Offline
          DenisKormalev
          wrote on last edited by
          #4

          Not sure it is really needed. If we return back to period when Qt3 and Qt4 were living together then all who posted about Qt4 wrote about version. And Qt5/Qt4 difference is not so much as Qt4/Qt3 was, so part of problems will be common for both versions.

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          • C Offline
            C Offline
            Chuck Gao
            wrote on last edited by
            #5

            I just waiting for scene graph, and it's 2.5x speed up for QML. @QtK, is it true that Qt5 won't besupported for Symbian devuces?

            Chuck

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            • EddyE Offline
              EddyE Offline
              Eddy
              wrote on last edited by
              #6

              [quote author="Denis Kormalev" date="1310543369"]Not sure it is really needed. If we return back to period when Qt3 and Qt4 were living together then all who posted about Qt4 wrote about version. And Qt5/Qt4 difference is not so much as Qt4/Qt3 was, so part of problems will be common for both versions.[/quote]

              Yes that's true. but some people will remain on Qt4 for a while when most of us are using Qt5.
              Then we will get questions about Qt4 while we expect it to be about Qt5. I remember from old times quiet some posts asking if it was about Qt4 or Qt3.

              Qt Certified Specialist
              www.edalsolutions.be

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              • A Offline
                A Offline
                andre
                wrote on last edited by
                #7

                True, people will make such mistakes. Lets deal with the issues if they arrise. As Denis already said: the differences between 4 and 5 will more like those between 2 and 3 than like those between 3 and 4. That means that there are less places where differences may be an issue. Otherwise, tags, [Qt4] tags or specialist (sub) forums may be a solution.

                Lastly: just by asking for the relevant version, you get points! What more could you ask for? ;-)

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                • EddyE Offline
                  EddyE Offline
                  Eddy
                  wrote on last edited by
                  #8

                  ok, I get your point. ;)

                  EDIT : in this context this is double.

                  I didn't know Qt5 and Qt4 look like one another so much.

                  Qt Certified Specialist
                  www.edalsolutions.be

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                  • A Offline
                    A Offline
                    andre
                    wrote on last edited by
                    #9

                    The plan is, that as long as you don' t use anyting marked depricated in Qt4 (including Qt3 support modules and -methods, of course), your Qt 4 sources should compile with Qt 5, perhaps after running a script over your sources to do some automatic changes. This will only be broken if that is needed for really important improvements.

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                    • EddyE Offline
                      EddyE Offline
                      Eddy
                      wrote on last edited by
                      #10

                      Ok thanks.

                      That's interesting to know.

                      Qt Certified Specialist
                      www.edalsolutions.be

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