Cocoa: QSystemTrayIcon showing native messages on Mountain Lion.

This patch enables usage of the new NSUserNotificationCenter as part of
Mountain Lion. On earlier versions, or if compiled on earlier versions,
Growl will be used, if installed.

Change-Id: I676f9c63aa3c1ada19d36b6310ae90915be63011
Reviewed-by: Jake Petroules <jake.petroules@petroules.com>
Reviewed-by: Richard J. Moore <rich@kde.org>

src/plugins/platforms/cocoa/qcocoasystemtrayicon.mm

@@ -93,7 +93,11 @@ QT_USE_NAMESPACE
 @class QT_MANGLE_NAMESPACE(QNSMenu);
 @class QT_MANGLE_NAMESPACE(QNSImageView);
 
-@interface QT_MANGLE_NAMESPACE(QNSStatusItem) : NSObject {
+@interface QT_MANGLE_NAMESPACE(QNSStatusItem) : NSObject
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_8
+    <NSUserNotificationCenterDelegate>
+#endif
+    {
 @public
     QCocoaSystemTrayIcon *systray;
     NSStatusItem *item;
@@ -108,6 +112,11 @@ QT_USE_NAMESPACE
 -(QRectF)geometry;
 - (void)triggerSelector:(id)sender button:(Qt::MouseButton)mouseButton;
 - (void)doubleClickSelector:(id)sender;
+
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_8
+- (BOOL)userNotificationCenter:(NSUserNotificationCenter *)center shouldPresentNotification:(NSUserNotification *)notification;
+- (void)userNotificationCenter:(NSUserNotificationCenter *)center didActivateNotification:(NSUserNotification *)notification;
+#endif
 @end
 
 @interface QT_MANGLE_NAMESPACE(QNSImageView) : NSImageView {
@@ -132,9 +141,19 @@ class QSystemTrayIconSys
 public:
     QSystemTrayIconSys(QCocoaSystemTrayIcon *sys) {
         item = [[QT_MANGLE_NAMESPACE(QNSStatusItem) alloc] initWithSysTray:sys];
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_8
+        if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_8) {
+            [[NSUserNotificationCenter defaultUserNotificationCenter] setDelegate:item];
+        }
+#endif
     }
     ~QSystemTrayIconSys() {
         [[[item item] view] setHidden: YES];
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_8
+        if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_8) {
+            [[NSUserNotificationCenter defaultUserNotificationCenter] setDelegate:nil];
+        }
+#endif
         [item release];
     }
     QT_MANGLE_NAMESPACE(QNSStatusItem) *item;
@@ -223,6 +242,18 @@ void QCocoaSystemTrayIcon::showMessage(const QString &title, const QString &mess
     if (!m_sys)
         return;
 
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_8
+    if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_8) {
+        NSUserNotification *notification = [[NSUserNotification alloc] init];
+        notification.title = [NSString stringWithUTF8String:title.toUtf8().data()];
+        notification.informativeText = [NSString stringWithUTF8String:message.toUtf8().data()];
+
+        [[NSUserNotificationCenter defaultUserNotificationCenter] deliverNotification:notification];
+
+        return;
+    }
+#endif
+
 #ifdef QT_MAC_SYSTEMTRAY_USE_GROWL
     // Make sure that we have Growl installed on the machine we are running on.
     QCFType<CFURLRef> cfurl;
@@ -439,6 +470,20 @@ QT_END_NAMESPACE
     emit systray->activated(QPlatformSystemTrayIcon::DoubleClick);
 }
 
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_8
+- (BOOL)userNotificationCenter:(NSUserNotificationCenter *)center shouldPresentNotification:(NSUserNotification *)notification {
+    Q_UNUSED(center);
+    Q_UNUSED(notification);
+    return YES;
+}
+
+- (void)userNotificationCenter:(NSUserNotificationCenter *)center didActivateNotification:(NSUserNotification *)notification {
+    Q_UNUSED(center);
+    Q_UNUSED(notification);
+    emit systray->messageClicked();
+}
+#endif
+
 @end
 
 class QSystemTrayIconQMenu : public QPlatformMenu

src/widgets/util/qsystemtrayicon.cpp

@@ -81,7 +81,7 @@ QT_BEGIN_NAMESPACE
        tray specification, including recent versions of KDE and GNOME.
     \li All supported versions of Mac OS X. Note that the Growl
        notification system must be installed for
-       QSystemTrayIcon::showMessage() to display messages.
+       QSystemTrayIcon::showMessage() to display messages on Mac OS X prior to 10.8 (Mountain Lion).
     \endlist
 
     To check whether a system tray is present on the user's desktop,