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

[Q139]

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.

[JohanSolo]

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()?

[Q139]

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

[JohanSolo]

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.

[Q139]

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.

[mrjj]

@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.