QWidget

[mickey]

Hi, I inserted this code in main.cpp; but button doesn't appear..Why?
Thanks

QWidget mw2;
	mw2.setGeometry(800,200,200,400);
	QButton* quit2 = new QButton(&mw2);
	quit2->setGeometry(0,0,10,10);
         mw2.show();

QWidget mw2;
	mw2.setGeometry(800,200,200,400);
	QButton* quit2 = new QButton(&mw2);
	quit2->setGeometry(0,0,10,10);
         mw2.show();

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[wysota]

Because you created the widget on stack and it got destroyed before it had a chance to reveal itself.

[mickey]

but why was it destroyed, please?

[jacek]

but why was it destroyed, please?

Probably because it went out of scope. Did you put that code inside an if statement or a loop body?

[mickey]

only button don't appear; widget is visible! I insert it in main() function...

[wysota]

Maybe you should use QPushButton instead of QButton?