Hi
I think there's a small error in the mdi example shipped with qt:
the closeEvent in the main window is
void MainWindow::closeEvent(QCloseEvent *event)
{
mdiArea->closeAllSubWindows();
if (activeMdiChild()) {
event->ignore();
} else {
writeSettings();
event->accept();
}
}
and activeMdiChild() is
MdiChild *MainWindow::activeMdiChild()
{
if (QMdiSubWindow *activeSubWindow = mdiArea->activeSubWindow())
return qobject_cast<MdiChild *>(activeSubWindow->widget());
return 0;
}
thus it returns the active sub window.
However, on closing the application, if one of the subwindows cancels
the close event the application closes anyway, since
mdiArea->activeSubWindow() returns 0.
Instead of activeSubWindow(), the currentSubWindow() should be used.
Thus, the closeEvent should read
void MainWindow::closeEvent(QCloseEvent *event)
{
mdiArea->closeAllSubWindows();
if (mdiArea->currentMdiChild()) {
event->ignore();
} else {
writeSettings();
event->accept();
}
}
--
Lorenzo Bettini, PhD in Computer Science, DI, Univ. Torino
ICQ# lbetto, 16080134 (GNU/Linux User # 158233)
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