QDialog and setModal

[ruscoff]

Hi all,
I'm programming with QT 4.8.4, and i need to show modal dialog.

I develop an QDialog frameless window with setModal(true). It's show correctly but mouse press position are wrong: if i put QPushButton as children of Dialog i can't click it correctly, seems there is an offset of 10px into mouse position.

This is how i show window: (show method is ovveride)

MenuPopupDialog *dlg = new MenuPopupDialog(this);
dlg->setWindowTitle("Menù");
dlg->setModal(true);
dlg->show(QSize(500,700));

MenuPopupDialog *dlg = new MenuPopupDialog(this);
dlg->setWindowTitle("Menù");
dlg->setModal(true);
dlg->show(QSize(500,700));

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But if i set setModal(false) and windowsFlag to frameless window + Popup mouse work correctly.

How can i resolve?

Thanks

Marco

---

Added after 1:

Another code problem:

QDialog *dlg = new QDialog(this);
	QPushButton *btn = new QPushButton(dlg);
	btn->setGeometry(20,20,50,50);
	dlg->setModal(true);
	dlg->show()
;

QDialog *dlg = new QDialog(this);
	QPushButton *btn = new QPushButton(dlg);
	btn->setGeometry(20,20,50,50);
	dlg->setModal(true);
	dlg->show()
;

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Try this cose, you will be not able to push the button, why?

Thanks

[ruscoff]

I found the problem:
I intercept WM_NCACTIVATE and set it always to True,thats means main windows always activate.
To work correctly QT need only one window actived, so i've to set WM_NCACTIVATE to False when required.