diff options
author | Volker Hilsheimer <volker.hilsheimer@qt.io> | 2020-04-29 14:39:49 +0200 |
---|---|---|
committer | Shawn Rutledge <shawn.rutledge@qt.io> | 2020-05-05 13:34:15 +0000 |
commit | 7db59f458b96342f762a0bd9f5218907c026019a (patch) | |
tree | d28e8cc7dfc8fd4759520a9e1a2cd71c567faad0 /src/gui/kernel/qwindow.cpp | |
parent | b8668257e6a6fadf429f65b3bcc6aff0cce063ec (diff) |
Add virtual QWindow::closeEvent handler
The default implementation does nothing; the processing of accepted
close events remains in the QWidget::event handler, so that subclasses
don't have to call the super class in order to free window system
resources and emit lastWindowClosed signals.
QWidgetWindow::event is reimplemented to handle QEvent::Close as well,
calling QWidgetPrivate::close_helper, which then delivers a separate
QCloseEvent to the widget.
The order of execution for widgets is after this change:
1) QWidgetWindow::event
2) QWidgetWindow::handleCloseEvent (calls QWidget::event/closeEvent)
3) QWindow::event
4) QWindow::closeEvent <- does nothing, not overridden
5) default cleanup handling in QWindow::event
and for Qt Quick after the corresponding change in qtdeclarative:
1) QQuickWindow::event
2) QWindow::event
3) QQuickWindow::closeEvent <- emits closed
4) default cleanup handling in QWindow::event
[ChangeLog][QtGui][QWindow] closeEvent has been added as a virtual
function.
Task-number: QTBUG-31019
Change-Id: I201f5ee9c6a73b949986648e3bd288d2c7898f28
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
Diffstat (limited to 'src/gui/kernel/qwindow.cpp')
-rw-r--r-- | src/gui/kernel/qwindow.cpp | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/src/gui/kernel/qwindow.cpp b/src/gui/kernel/qwindow.cpp index fd89e479b8..1b154770f8 100644 --- a/src/gui/kernel/qwindow.cpp +++ b/src/gui/kernel/qwindow.cpp @@ -2234,7 +2234,7 @@ void QWindow::showNormal() quitting the application. Returns \c true on success, false if it has a parent window (in which case the top level window should be closed instead). - \sa destroy(), QGuiApplication::quitOnLastWindowClosed() + \sa destroy(), QGuiApplication::quitOnLastWindowClosed(), closeEvent() */ bool QWindow::close() { @@ -2320,6 +2320,19 @@ void QWindow::hideEvent(QHideEvent *ev) } /*! + Override this to handle close events (\a ev). + + The function is called when the window is requested to close. Call \l{QEvent::ignore()} + on the event if you want to prevent the window from being closed. + + \sa close() +*/ +void QWindow::closeEvent(QCloseEvent *ev) +{ + Q_UNUSED(ev); +} + +/*! Override this to handle any event (\a ev) sent to the window. Return \c true if the event was recognized and processed. @@ -2395,6 +2408,7 @@ bool QWindow::event(QEvent *ev) #endif case QEvent::Close: + closeEvent(static_cast<QCloseEvent*>(ev)); if (ev->isAccepted()) { Q_D(QWindow); bool wasVisible = isVisible(); |