Application running but doesn't show up!!!

[joandelason]

Hi
I finally managed to compile and link my first GUI application in Qt (which is almost a miracle :)), but it doesn't show up. My application is just an OpenGl render context (like the one in the hellogl example) with the menu bar. It's quite strange because I open the task manager and the process is running.

Any idea?

THANK YOU

[Lykurg]

did you call show() or exec()? please provide some code because without it is hard to help. How does your main function look like?

[joandelason]

This is the main function. I run my app on a Mac and it works (although when closing it it crashes). But on Windows it does'n show up.


#include <QApplication>
#include <QDesktopWidget>

#include "SDIWindow.h"

int main(int argc, char *argv[])
{
QApplication app(argc, argv);
SdiWindow window;
window.resize(window.sizeHint());

window.showMaximized();
return app.exec();
}


The code is copy-pasted from the hellogl example with a small change done to make the render context occupy the whole window.

Here is the code of the hellogl main function.


#include <QApplication>
#include <QDesktopWidget>

#include "window.h"

int main(int argc, char *argv[])
{
QApplication app(argc, argv);
Window window;
window.resize(window.sizeHint());
int desktopArea = QApplication::desktop()->width() *
QApplication::desktop()->height();
int widgetArea = window.width() * window.height();
if (((float)widgetArea / (float)desktopArea) < 0.75f)
window.show();
else
window.showMaximized();
return app.exec();
}

[Lykurg]

I can't see any error. Try to debug your application. See where it crashes on mac and use breakpoints to see where it might "hang up" on windows.

[wysota]

Could you paste the code for the window class if it is not too complicated?