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Thread: QDialog problem with exec()

  1. #1
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    Default QDialog problem with exec()

    Qt Code:
    1. ...
    2. form_login l;
    3. if (l.exec() == QDialog::Accepted)
    4. {
    5. tmain_form main_form;
    6. main_form.show();
    7. return a.exec();
    8. }
    9. ...
    To copy to clipboard, switch view to plain text mode 

    Hi I'm using this code to show a login form on the main.cpp file.

    When used in this way before the a.exec(), everything works fine.
    But when I try this, the exec() is not executed in the usual way, the dialog is closed not waiting for user action.

    Qt Code:
    1. tcontrol *control = new tcontrol();
    2.  
    3. if (control->login())
    4. {
    5. tmain_form main_form;
    6. main_form.show();
    7. return a.exec();
    8. }
    To copy to clipboard, switch view to plain text mode 

    and login is just a method wrapping the first code, returning (l.exec() == QDialog::Accepted)

    What is the difference?

    I'm missing something?

    Thanks in advance.

  2. #2
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    Default Re: QDialog problem with exec()

    Disconnect the lastWindowClosed() signal in the application object from its quit() slot.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


  3. #3
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    Default Re: QDialog problem with exec()

    Quote Originally Posted by wysota View Post
    Disconnect the lastWindowClosed() signal in the application object from its quit() slot.
    Thanks for the reply.

    Before the tcontrol *control = new tcontrol(); line, I use this a.setQuitOnLastWindowClosed(false); as I check on documentation:
    void QApplication::lastWindowClosed () [signal]
    ...
    This feature can be turned off by setting quitOnLastWindowClosed to false.
    but the result is the same.

  4. #4
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    Default Re: QDialog problem with exec()

    Please provide a minimal compilable example reproducing the problem.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


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