Fix ref counted window close handling.

Instead of refcounting QWindow visibility, we ask the Application
subclass whether quitting is appropriate.

Task-Id: QTBUG-24120
Change-Id: Idd19cc1a3e5742fddded89c7638aaaa5e47c568d
Reviewed-by: Bradley T. Hughes <bradley.hughes@nokia.com>
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index 4d80aafea5..5f50fe343a 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -1477,6 +1477,17 @@ void QGuiApplicationPrivate::emitLastWindowClosed()
     }
 }
 
+bool QGuiApplicationPrivate::shouldQuit()
+{
+    /* if there is no visible top-level window left, we allow the quit */
+    QWindowList list = QGuiApplication::topLevelWindows();
+    for (int i = 0; i < list.size(); ++i) {
+        QWindow *w = list.at(i);
+        if (w->visible())
+            return false;
+    }
+    return true;
+}
 
 /*!
     \property QGuiApplication::layoutDirection