8 files changed, 20 insertions, 10 deletions
diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index 585eca84ca..3c79e62e75 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -1740,6 +1740,9 @@ void QGuiApplicationPrivate::processCloseEvent(QWindowSystemInterfacePrivate::Cl
 
     QCloseEvent event;
     QGuiApplication::sendSpontaneousEvent(e->window.data(), &event);
+    if (e->accepted) {
+        *(e->accepted) = !event.isAccepted();
+    }
 }
 
 void QGuiApplicationPrivate::processFileOpenEvent(QWindowSystemInterfacePrivate::FileOpenEvent *e)
diff --git a/src/gui/kernel/qwindowsysteminterface.cpp b/src/gui/kernel/qwindowsysteminterface.cpp
index d2add91d66..7dc1e7f7e5 100644
--- a/src/gui/kernel/qwindowsysteminterface.cpp
+++ b/src/gui/kernel/qwindowsysteminterface.cpp
@@ -140,11 +140,11 @@ void QWindowSystemInterface::handleGeometryChange(QWindow *tlw, const QRect &new
     QWindowSystemInterfacePrivate::handleWindowSystemEvent(e);
 }
 
-void QWindowSystemInterface::handleCloseEvent(QWindow *tlw)
+void QWindowSystemInterface::handleCloseEvent(QWindow *tlw, bool *accepted)
 {
     if (tlw) {
         QWindowSystemInterfacePrivate::CloseEvent *e =
-                new QWindowSystemInterfacePrivate::CloseEvent(tlw);
+                new QWindowSystemInterfacePrivate::CloseEvent(tlw, accepted);
         QWindowSystemInterfacePrivate::handleWindowSystemEvent(e);
     }
 }
diff --git a/src/gui/kernel/qwindowsysteminterface.h b/src/gui/kernel/qwindowsysteminterface.h
index 212259c113..521c2a4941 100644
--- a/src/gui/kernel/qwindowsysteminterface.h
+++ b/src/gui/kernel/qwindowsysteminterface.h
@@ -131,7 +131,7 @@ public:
     static void handleTouchCancelEvent(QWindow *w, ulong timestamp, QTouchDevice *device, Qt::KeyboardModifiers mods = Qt::NoModifier);
 
     static void handleGeometryChange(QWindow *w, const QRect &newRect);
-    static void handleCloseEvent(QWindow *w);
+    static void handleCloseEvent(QWindow *w, bool *accepted = 0);
     static void handleEnterEvent(QWindow *w, const QPointF &local = QPointF(), const QPointF& global = QPointF());
     static void handleLeaveEvent(QWindow *w);
     static void handleEnterLeaveEvent(QWindow *enter, QWindow *leave, const QPointF &local = QPointF(), const QPointF& global = QPointF());
diff --git a/src/gui/kernel/qwindowsysteminterface_p.h b/src/gui/kernel/qwindowsysteminterface_p.h
index f1bc4667f7..a6ea15c5f2 100644
--- a/src/gui/kernel/qwindowsysteminterface_p.h
+++ b/src/gui/kernel/qwindowsysteminterface_p.h
@@ -105,9 +105,11 @@ public:
 
     class CloseEvent : public WindowSystemEvent {
     public:
-        explicit CloseEvent(QWindow *w)
-            : WindowSystemEvent(Close), window(w) { }
+        explicit CloseEvent(QWindow *w, bool *a = 0)
+            : WindowSystemEvent(Close), window(w), accepted(a)
+            { }
         QPointer<QWindow> window;
+        bool *accepted;
     };
 
     class GeometryChangeEvent : public WindowSystemEvent {
diff --git a/src/plugins/platforms/cocoa/qcocoawindow.h b/src/plugins/platforms/cocoa/qcocoawindow.h
index b2657b7725..60f448044e 100644
--- a/src/plugins/platforms/cocoa/qcocoawindow.h
+++ b/src/plugins/platforms/cocoa/qcocoawindow.h
@@ -132,7 +132,7 @@ public:
     void windowWillMove();
     void windowDidMove();
     void windowDidResize();
-    void windowWillClose();
+    bool windowShouldClose();
     bool windowIsPopupType(Qt::WindowType type = Qt::Widget) const;
 
     NSInteger windowLevel(Qt::WindowFlags flags);
diff --git a/src/plugins/platforms/cocoa/qcocoawindow.mm b/src/plugins/platforms/cocoa/qcocoawindow.mm
index 14b9b66c92..8e9fcc443b 100644
--- a/src/plugins/platforms/cocoa/qcocoawindow.mm
+++ b/src/plugins/platforms/cocoa/qcocoawindow.mm
@@ -684,10 +684,12 @@ void QCocoaWindow::windowDidResize()
     [m_qtView updateGeometry];
 }
 
-void QCocoaWindow::windowWillClose()
+bool QCocoaWindow::windowShouldClose()
 {
-    QWindowSystemInterface::handleCloseEvent(window());
+    bool accepted = false;
+    QWindowSystemInterface::handleCloseEvent(window(), &accepted);
     QWindowSystemInterface::flushWindowSystemEvents();
+    return accepted;
 }
 
 bool QCocoaWindow::windowIsPopupType(Qt::WindowType type) const
diff --git a/src/plugins/platforms/cocoa/qnswindowdelegate.h b/src/plugins/platforms/cocoa/qnswindowdelegate.h
index 98ad7b8c9d..a5b46a971f 100644
--- a/src/plugins/platforms/cocoa/qnswindowdelegate.h
+++ b/src/plugins/platforms/cocoa/qnswindowdelegate.h
@@ -56,6 +56,7 @@
 - (void)windowDidResize:(NSNotification *)notification;
 - (void)windowDidMove:(NSNotification *)notification;
 - (void)windowWillClose:(NSNotification *)notification;
+- (BOOL)windowShouldClose:(NSNotification *)notification;
 
 @end
 
diff --git a/src/plugins/platforms/cocoa/qnswindowdelegate.mm b/src/plugins/platforms/cocoa/qnswindowdelegate.mm
index b19a401443..8e17936a78 100644
--- a/src/plugins/platforms/cocoa/qnswindowdelegate.mm
+++ b/src/plugins/platforms/cocoa/qnswindowdelegate.mm
@@ -80,12 +80,14 @@
     }
 }
 
-- (void)windowWillClose:(NSNotification *)notification
+- (BOOL)windowShouldClose:(NSNotification *)notification
 {
     Q_UNUSED(notification);
     if (m_cocoaWindow) {
-        m_cocoaWindow->windowWillClose();
+        return m_cocoaWindow->windowShouldClose();
     }
+
+    return YES;
 }
 
 @end