Upgrade QT3 to QT4
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Here at work we run Centos and have QT3 and QT4 installed along with OpenGL. Everyone uses 3 but I am trying to get 4 going so we can get partway to 4 and eventually to there and then maybe 5. I am a Linux novice and having trouble getting 4 to work. After working this for three days my latest attempts include: prefixing PATH with
/usr/lib64/qt4:usr/include/Qtreplacing qmake with qmake-qt4
removing app.setMainWidget() from main.cpp, because it is not in QT4
Editing Make file to add-I/usr/include/Qtbecause it could not find qgl.h with the needed directory in PATH. (Did not need to do that for QT3.)
The latest attempt at make claims there is no matching function for call toQDialog::QDialog( QWidget*&, const char*&)I have visited some qt.io sites about the conversion but they discuss code changes. I am starting from the beginning with simple examples from the books: “C++ GUI Programming with QT3” and with “… QT 4”
What should I try next? Where might I look for some guidance?
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Hi
Sadly im not good with Centos.However, how did you install it ?
it seems to have an RPM for it
https://centos.pkgs.org/7/centos-x86_64/qt-4.8.7-2.el7.x86_64.rpm.htmlon Ubuntu there is a tool qtchooser
there is not something like that for Centos? -
Here at work we run Centos and have QT3 and QT4 installed along with OpenGL. Everyone uses 3 but I am trying to get 4 going so we can get partway to 4 and eventually to there and then maybe 5. I am a Linux novice and having trouble getting 4 to work. After working this for three days my latest attempts include: prefixing PATH with
/usr/lib64/qt4:usr/include/Qtreplacing qmake with qmake-qt4
removing app.setMainWidget() from main.cpp, because it is not in QT4
Editing Make file to add-I/usr/include/Qtbecause it could not find qgl.h with the needed directory in PATH. (Did not need to do that for QT3.)
The latest attempt at make claims there is no matching function for call toQDialog::QDialog( QWidget*&, const char*&)I have visited some qt.io sites about the conversion but they discuss code changes. I am starting from the beginning with simple examples from the books: “C++ GUI Programming with QT3” and with “… QT 4”
What should I try next? Where might I look for some guidance?
@BKBK said in Upgrade QT3 to QT4:
The latest attempt at make claims there is no matching function for call to
Check the QDialog documentation from Qt4 to see what the correct QDialog constructor in Qt4 is.
