How to call ui->show(); from other file



  • int main(int argc, char *argv[])
    {
    QApplication a(argc, argv);

     QSurfaceFormat format;
     //antializing samples
     format.setSamples(16);
     TriangleWindow window;
     window.setFormat(format);
     window.resize(900, 700);
     window.setAnimating(true);
     window.show();  //gl
    
     MainWin m_win;
     m_win.show();       //ui
    
     timer_class tim;
     tim.start_play_timer();
    
    return a.exec();
    

    }

    How to call ui->show(); from other file?

    Cannot declare extern and place MainWin m_win before main() it crashes app.
    Also would be good if QSurfaceFormat format; acessible by other files.



  • I guess the ui->show() you're referring to is the one from the designer part of your MainWin class. Why don't you add a method in MainWin which internally callsui->show()?



  • Can you please describe in more detail , my programming vocabulary not very good.



  • Well, your question is not so clear as well. I'll try again.

    I guess the ui you're talking about is declared in the MainWin header fil e. Then what I told you is IF you need to be able to call ui->show, you could add a method in MainWin class, which would internally call ui->show. However, I don't think this is usefull, as calling MainWin::show() calls show for the ui component.

    I have no clue about which QSurfaceFormat instance you're talking about. I don't have any crystal ball, therefore it's hard to tell.



  • Very sorry, i was not aware that you are not having big crystal ball.
    Would like to be able to call TriangleWindow and mainwin from eachother to respawn closed window.


  • Qt Champions 2016

    @Q139
    Hi your idea with extern should be able to work.
    Just use pointers and it will work.

    in "TriangleWindow.h"
    have
    extern TriangleWindow *MyTW;
    and have it defined in the .cpp

    and then in main
    do
    MyTW=new TriangleWindow();
    Then in other file , say mainwindow you can include
    TriangleWindow .h and have access via
    MYTW;
    This is of course global variables and might
    not be the most elegant way of handling it.

    regarding
    QSurfaceFormat format;
    This only lives in main and you must move it as only main can see it.


Log in to reply
 

Looks like your connection to Qt Forum was lost, please wait while we try to reconnect.