Open subwindow

[olidem]

Hi!

Although this is a often treated problem, I am confused about the thousand possibilities that exist to realise what I want.

I have a slot being connected to a button that shall open a subwindow.

- this subwindow is a subclass of QWidget
- it shall not appear in the taskbar (on Windows)
- it shall have a minimize-, maximize- and close-button
- it shall have a system menu in the upper left corner
- it shall be resizable
- it shall be MODAL, the window containing the button to open the subwindow shall be blocked as long as the subwindow is open.

So far I have the following:

void MainWindow::openSubWindow()
{
	SubWindowWidget w(customer);
	QDialog diag(0, Qt::Window );
	diag.setSizeGripEnabled(true);
	QHBoxLayout * lay = new QHBoxLayout;
	lay->addWidget(&w);
	diag.setLayout(lay);
	diag.exec();
}

void MainWindow::openSubWindow()
{
	SubWindowWidget w(customer);
	QDialog diag(0, Qt::Window );
	diag.setSizeGripEnabled(true);
	QHBoxLayout * lay = new QHBoxLayout;
	lay->addWidget(&w);
	diag.setLayout(lay);
	diag.exec();
}

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First problem of this: the destructor of w is called twice!
Can I somehow omit the usage of a QDialog?

[spirit]

try this

void MainWindow::openSubWindow()
{
    SubWindowWidget *w = new SubWindowWidget(customer);
    w->setAttribute(Qt::WA_DeleteOnClose);
    w->setAttribute(Qt::WA_ShowModal);
    w->show();
//    QDialog diag(0, Qt::Window );
//    diag.setSizeGripEnabled(true);
//    QHBoxLayout * lay = new QHBoxLayout;
//    lay->addWidget(&w);
//    diag.setLayout(lay);
//    diag.exec();
}

void MainWindow::openSubWindow()
{
    SubWindowWidget *w = new SubWindowWidget(customer);
    w->setAttribute(Qt::WA_DeleteOnClose);
    w->setAttribute(Qt::WA_ShowModal);
    w->show();
//    QDialog diag(0, Qt::Window );
//    diag.setSizeGripEnabled(true);
//    QHBoxLayout * lay = new QHBoxLayout;
//    lay->addWidget(&w);
//    diag.setLayout(lay);
//    diag.exec();
}

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[spirit]

btw, customer is a widget?

[olidem]

NICE NICE NICE NICE !!!!

Thx, this is what i was looking for.

The only thing that is still not how I want it is the fact the the subwindow gets an entry in the Windows taskbar.

[spirit]

try this

void MainWindow::openSubWindow()
{
    SubWindowWidget *w = new SubWindowWidget(0);
    w->setAttribute(Qt::WA_DeleteOnClose);
    w->setAttribute(Qt::WA_ShowModal);
    w->show();
}

void MainWindow::openSubWindow()
{
    SubWindowWidget *w = new SubWindowWidget(0);
    w->setAttribute(Qt::WA_DeleteOnClose);
    w->setAttribute(Qt::WA_ShowModal);
    w->show();
}

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that's why I was asking about customer.

[wysota]

The only thing that is still not how I want it is the fact the the subwindow gets an entry in the Windows taskbar.

Pass the main window as the parent of the dialog.

[olidem]

Cool, that's it.

I just had to additionally specify

w->setWindowFlags(Qt::Window);

To summarise, I use the following code now:

void MainWindow::openSubWindow()
{
    SubWindowWidget *w = new SubWindowWidget(0);
    w->setParent(this);
    w->setWindowFlags(Qt::Window);
    w->setAttribute(Qt::WA_DeleteOnClose);
    w->setAttribute(Qt::WA_ShowModal);
    w->show();
}

void MainWindow::openSubWindow()
{
    SubWindowWidget *w = new SubWindowWidget(0);
    w->setParent(this);
    w->setWindowFlags(Qt::Window);
    w->setAttribute(Qt::WA_DeleteOnClose);
    w->setAttribute(Qt::WA_ShowModal);
    w->show();
}

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Thanks for all your help again!

Problem solved, thread can be closed.

[spirit]

it's better to do like this

void MainWindow::openSubWindow()
{
    SubWindowWidget *w = new SubWindowWidget(this);
    w->setAttribute(Qt::WA_DeleteOnClose);
    w->setAttribute(Qt::WA_ShowModal);
    w->show();
}

void MainWindow::openSubWindow()
{
    SubWindowWidget *w = new SubWindowWidget(this);
    w->setAttribute(Qt::WA_DeleteOnClose);
    w->setAttribute(Qt::WA_ShowModal);
    w->show();
}

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EDITED: you can also remove w->setAttribute(Qt::WA_DeleteOnClose); because since you pass a parent in SubWindowWidget it will be deleted when a parent is being deleted.

[wysota]

I'd do it like this:

void MainWindow::openSubWindow()
{
    QDialog dlg(this);
    QHBoxLayout *l = new QHBoxLayout(&dlg);
    SubWindowWidget *w = new SubWindowWidget;
    l->addWidget(w);
    dlg.exec();
}

void MainWindow::openSubWindow()
{
    QDialog dlg(this);
    QHBoxLayout *l = new QHBoxLayout(&dlg);
    SubWindowWidget *w = new SubWindowWidget;
    l->addWidget(w);
    dlg.exec();
}

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