Clarify QWindowPrivate::maybeQuitOnLastWindowClosed

We only need to check QGuiApplication::quitOnLastWindowClosed() at
the point where we've actually concluded that the last window was
closed.

Checking for !q->parent() was redundant, as we were already
exiting early when !q->isTopLevel().

Change-Id: I934e186d707361b31d19692c04d2e17b7ba0f49e
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
(cherry picked from commit 1649137b9311a5ee3d12bc8824f5453294bd6fe9)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/gui/kernel/qwindow.cpp b/src/gui/kernel/qwindow.cpp
index 544849a197..d93f43a310 100644
--- a/src/gui/kernel/qwindow.cpp
+++ b/src/gui/kernel/qwindow.cpp
@@ -2776,8 +2776,7 @@ void QWindowPrivate::maybeQuitOnLastWindowClosed()
     Q_Q(QWindow);
     if (!q->isTopLevel())
         return;
-    // Attempt to close the application only if this has WA_QuitOnClose set and a non-visible parent
-    bool quitOnClose = QGuiApplication::quitOnLastWindowClosed() && !q->parent();
+
     QWindowList list = QGuiApplication::topLevelWindows();
     bool lastWindowClosed = true;
     for (int i = 0; i < list.size(); ++i) {
@@ -2789,7 +2788,8 @@ void QWindowPrivate::maybeQuitOnLastWindowClosed()
     }
     if (lastWindowClosed) {
         QGuiApplicationPrivate::emitLastWindowClosed();
-        if (quitOnClose) {
+
+        if (QGuiApplication::quitOnLastWindowClosed()) {
             QCoreApplicationPrivate *applicationPrivate = static_cast<QCoreApplicationPrivate*>(QObjectPrivate::get(QCoreApplication::instance()));
             applicationPrivate->maybeQuit();
         }