How to resize window with pushbutton

[jacek]

First of all QApplication isn't a widget, so you can't resize it. Secondly QWidget::resize() isn't a slot, but a normal method, so you can't connect any signals to it. Also you can't put parameter values inside SLOT() and SIGNAL() macros.

You need a custom slot to do this:

QObject::connect(&quit, SIGNAL(clicked()), &someWidget, SLOT(resize()); 
...
void SomeWidget::resize()
{
   resize( 500, 500 );
}

QObject::connect(&quit, SIGNAL(clicked()), &someWidget, SLOT(resize()); 
...
void SomeWidget::resize()
{
   resize( 500, 500 );
}

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