Using QApplication with command line arguments

Question

QApplication::QApplication ( int & argc, char ** argv )

Initializes the window system and constructs an application object

Answer 1

The suggestion about using QCoreApplication is only recommended of you have a console application. If you are using a QApplication instead, and want to access command-line arguments from inside a QWidget, you can do it with the global pointer qApp:

Here you can find the documentation from Nokia, or here from qt-project.org . In the documentation browser of Qt Creator I couldn't find it, so it is at best not that easily accessible.

so you can find:

int my_argc = qApp->arguments().count();

QString my_argv_0 = qApp->arguments.at(0);

...

and so on.

I know this question is old, but took me some time to find a way to do it from within my Main Window, so hope this helps someone else.