Add QQuickWindow::closing signal, and ability to ignore the event

An application can implement onClosing() and set
closeEvent.accepted = false to delay the closing (for example to
prompt the user to save changes).  Depends on change
I9abed47fca02a002b78727f98d678a824854adfc in qtbase.

Task-number: QTBUG-31019
Change-Id: Icfd4a03ecef3621bdbbee2e2c3157b897a9b6524
Reviewed-by: Alan Alpert (Personal) <416365416c@gmail.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/quick/items/qquickwindow_p.h b/src/quick/items/qquickwindow_p.h
index afcf4a995a..9e3251b240 100644
--- a/src/quick/items/qquickwindow_p.h
+++ b/src/quick/items/qquickwindow_p.h
@@ -231,9 +231,26 @@ private:
     static void cleanupNodesOnShutdown(QQuickItem *);
 };
 
+class Q_QUICK_PRIVATE_EXPORT QQuickCloseEvent : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(bool accepted READ isAccepted WRITE setAccepted)
+
+public:
+    QQuickCloseEvent()
+        : _accepted(true) {}
+
+    bool isAccepted() { return _accepted; }
+    void setAccepted(bool accepted) { _accepted = accepted; }
+
+private:
+    bool _accepted;
+};
 
 Q_DECLARE_OPERATORS_FOR_FLAGS(QQuickWindowPrivate::FocusOptions)
 
 QT_END_NAMESPACE
 
+QML_DECLARE_TYPE(QQuickCloseEvent)
+
 #endif // QQUICKWINDOW_P_H