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QMdiArea: fix initial single-sub-window in TabbedView

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This is somewhat of a corner case, where there is a single sub-window,
setViewMode(TabbedView) is called before addSubWindow(), and the latter
is called before show(). The sub-window would be active, i.e.
subwindow->d_func()->isActive is true and QMdiArea::aboutToActivate() is
emitted, but QMA::emitSubWindowActivated() is never called for that
sub-window, resulting in that sub-window shown as
unmaximized/with-a-title-bar instead of as maximized/tabbed as is
expected in TabbedView.

Pick-to: 6.6 6.5
Fixes: QTBUG-114188
Change-Id: Ia7b2cfd07c51867707866a1f99f70129bbdc0e3e
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
This commit is contained in:
Ahmad Samir 2023-11-06 22:42:19 +02:00
parent 17372faf3f
commit c94bcecb22
3 changed files with 22 additions and 0 deletions
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5
src/widgets/widgets/qmdiarea.cpp
View File

@ -2376,6 +2376,11 @@ void QMdiArea::showEvent(QShowEvent *showEvent)
for (QMdiSubWindow *window : copy) {
if (!window)
continue;
if (d->viewMode == TabbedView && window->d_func()->isActive && !d->active) {
d->showActiveWindowMaximized = true;
d->emitWindowActivated(window); // Also maximizes the window
continue;
}
if (!window->testAttribute(Qt::WA_Resized)) {
QSize newSize(window->sizeHint().boundedTo(viewport()->size()));
window->resize(newSize.expandedTo(qSmartMinSize(window)));

1
src/widgets/widgets/qmdisubwindow.h
View File

@ -101,6 +101,7 @@ private:
Q_PRIVATE_SLOT(d_func(), void _q_enterInteractiveMode())
Q_PRIVATE_SLOT(d_func(), void _q_processFocusChanged(QWidget *, QWidget *))
friend class QMdiAreaPrivate;
friend class QMdiArea;
#if QT_CONFIG(tabbar)
friend class QMdiAreaTabBar;
#endif

16
tests/auto/widgets/widgets/qmdiarea/tst_qmdiarea.cpp
View File

@ -260,6 +260,7 @@ private slots:
void task_236750();
void qtbug92240_title_data();
void qtbug92240_title();
void tabbedview_singleSubWindow();
void tabbedview_activefirst();
void tabbedview_activesecond();
void tabbedview_activethird();
@ -2728,6 +2729,21 @@ void tst_QMdiArea::qtbug92240_title()
QTRY_COMPARE(w.windowTitle(), QLatin1String("QTBUG-92240 - [2]"));
}
void tst_QMdiArea::tabbedview_singleSubWindow()
{
// With only one sub-window, setViewMode() before addSubWindow(); and addSubWindow()
// before show(), ensure the sub-window is properly activated.
QMdiArea mdiArea;
mdiArea.setViewMode(QMdiArea::TabbedView);
auto *w = new QWidget(&mdiArea);
mdiArea.addSubWindow(w);
mdiArea.show();
QVERIFY(QTest::qWaitForWindowExposed(&mdiArea));
auto *sub = mdiArea.subWindowList().at(0);
QCOMPARE(mdiArea.activeSubWindow(), sub);
QVERIFY(sub->isMaximized());
}
static void setupMdiAreaWithTabbedView(QMdiArea &mdiArea)
{
mdiArea.setViewMode(QMdiArea::TabbedView);