Independant window in an application

[titoo]

I need to create for an application a window which can go out of the main window of the application. So I thought about creatin a widget with no parent. But I then have several problems :

¤ if I destroy the main window I still need to destroy the second window to stop the application,
¤ I have a box for this independant winodw in the systray,
¤ I need absolute coordinates of a UI widget of the main window to place the independant window but I only get relative coordinates atm

Is there an alternative way to do so, or do you know hoiw to avoid the problems I have ?
About destruction I figure how to do but I don't find the solution for the 2 other problems.

[wysota]

¤ if I destroy the main window I still need to destroy the second window to stop the application,

Delete the window from the other window's destructor.

¤ I have a box for this independant winodw in the systray,

Try setting the Qt::Tool window flag while creating the window.

¤ I need absolute coordinates of a UI widget of the main window to place the independant window but I only get relative coordinates atm

Use QWidget::mapToGlobal()

Is there an alternative way to do so, or do you know hoiw to avoid the problems I have ?

Depends what exactly is that you want to achieve.

[titoo]

well a windows son of the main windows should be ok but i need to get this window to be able to be partly or completely out of the main window and i think that inheritance will definitely not allow me to do this.

[wysota]

Have you tried this?

QMainWindow *mw = new QMainWindow;
QDialog dlg = new QDialog(mw);
mw->show();
dlg->show();

QMainWindow *mw = new QMainWindow;
QDialog dlg = new QDialog(mw);
mw->show();
dlg->show();

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What inheritance are we talking about here?

[titoo]

looks like QDialog allows me to get the window out of the main window, sounds good ty