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Thread: How to use main args

  1. #1
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    Default How to use main args

    Hi,

    I'm amking a Qt Gui application so the main its like:

    Qt Code:
    1. int main(int argc, char *argv[])
    2. {
    3. QApplication a(argc, argv); //Maybe I can do something with this line?
    4. }
    To copy to clipboard, switch view to plain text mode 

    I need to use those arguments (argc, argv[]) in the mainwindow. So my question is: How can I use them there? The only solution I can think of is to create a new class which receives them, put them in global variables and then inherite mainwindow from the new class but I don't really like it and I suposse there is an easer way to do it.

    Thanks!
    Last edited by roseicollis; 23rd December 2014 at 11:19.

  2. #2
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    Default Re: How to use main args

    First, you always need int main( int argc, char *argv[] ) because you need to pass argc and argv to QApplication. Next (seeing a Linux programmer), there are no __argc and __argv in Linux so that you need to catch argc and argv yourself when they pass by. Therefore:

    (1) Derive a class MyApplication from QApplication. Give MyApplication data items argc and argv.
    (2) In the MyApplication ctor, copy argc and argv to your data items. Now:
    Qt Code:
    1. int main( int argc, char *argv[] )
    2. {
    3. MyApplication app(argc, argv);
    4.  
    5. // etc...
    6. }
    To copy to clipboard, switch view to plain text mode 

  3. #3
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    Default Re: How to use main args

    Hi!
    Yes, I'm running it on unix. Thank you for the answer.
    As I see the only way is to create an other class then.

    And then what should I do? Include of MyApplication on mainwindow.cpp or inherit from it like class MainWindow : public QMainWindow, MyApplycation ?? I can't see neither options hehe

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    Default Re: How to use main args

    Quote Originally Posted by roseicollis View Post
    I need to use those arguments (argc, argv[]) in the mainwindow. So my question is: How can I use them there?
    QCoreApplication::arguments(), QCommandLineParser.

    Cheers,
    _

  5. #5
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    Default Re: How to use main args

    Yeah! That was anda_skoa, thank you!

    I let here the line for those who visit that thread after

    QStringList ArgsList = QApplication::arguments();

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