ApplicationState: Add new event class: ApplicationStateChangeEvent

This patch will follow up on e27ca37 (add more state to
QT::ApplicationState), and add a new event class
QApplicationStateChangeEvent with type Qt::ApplicationStateChange.

Change-Id: Idee724f181f1fbb2321ddad7e0df00c88b3488b1
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>

src/corelib/kernel/qcoreevent.cpp

@@ -98,12 +98,13 @@ QT_BEGIN_NAMESPACE
     \value ActionChanged                    An action has been changed (QActionEvent).
     \value ActionRemoved                    An action has been removed (QActionEvent).
     \value ActivationChange                 A widget's top-level window activation state has changed.
-    \value ApplicationActivate              The application has been made available to the user.
-    \value ApplicationActivated             This enum has been deprecated. Use ApplicationActivate instead.
-    \value ApplicationDeactivate            The application has been suspended, and is unavailable to the user.
+    \value ApplicationActivate              This enum has been deprecated. Use ApplicationStateChange instead.
+    \value ApplicationActivated             This enum has been deprecated. Use ApplicationStateChange instead.
+    \value ApplicationDeactivate            This enum has been deprecated. Use ApplicationStateChange instead.
     \value ApplicationFontChange            The default application font has changed.
     \value ApplicationLayoutDirectionChange The default application layout direction has changed.
     \value ApplicationPaletteChange         The default application palette has changed.
+    \value ApplicationStateChange           The state of the application has changed.
     \value ApplicationWindowIconChange      The application's icon has changed.
     \value ChildAdded                       An object gets a child (QChildEvent).
     \value ChildPolished                    A widget child gets polished (QChildEvent).
@@ -264,7 +265,9 @@ QT_BEGIN_NAMESPACE
     \omitvalue Style
     \omitvalue StyleAnimationUpdate
     \omitvalue ZeroTimerEvent
+    \omitvalue ApplicationActivate
     \omitvalue ApplicationActivated
+    \omitvalue ApplicationDeactivate
     \omitvalue ApplicationDeactivated
     \omitvalue MacGLWindowChange
     \omitvalue MacGLClearDrawable

src/corelib/kernel/qcoreevent.h

@@ -167,9 +167,9 @@ public:
 
         ToolBarChange = 120,                    // toolbar visibility toggled
 
-        ApplicationActivate = 121,              // application has been changed to active
+        ApplicationActivate = 121,              // deprecated. Use ApplicationStateChange instead.
         ApplicationActivated = ApplicationActivate, // deprecated
-        ApplicationDeactivate = 122,            // application has been changed to inactive
+        ApplicationDeactivate = 122,            // deprecated. Use ApplicationStateChange instead.
         ApplicationDeactivated = ApplicationDeactivate, // deprecated
 
         QueryWhatsThis = 123,                   // query what's this widget help
@@ -276,6 +276,7 @@ public:
         PlatformPanel = 212,
 
         StyleAnimationUpdate = 213,             // style animation target should be updated
+        ApplicationStateChange = 214,
 
         // 512 reserved for Qt Jambi's MetaCall event
         // 513 reserved for Qt Jambi's DeleteOnMainThread event

src/gui/kernel/qevent.cpp

@@ -4400,4 +4400,21 @@ Qt::ScreenOrientation QScreenOrientationChangeEvent::orientation() const
     return m_orientation;
 }
 
+/*!
+    Creates a new QApplicationStateChangeEvent.
+    \a applicationState is the new state.
+*/
+QApplicationStateChangeEvent::QApplicationStateChangeEvent(Qt::ApplicationState applicationState)
+    : QEvent(QEvent::ApplicationStateChange), m_applicationState(applicationState)
+{
+}
+
+/*!
+    Returns the state of the application.
+*/
+Qt::ApplicationState QApplicationStateChangeEvent::applicationState() const
+{
+    return m_applicationState;
+}
+
 QT_END_NAMESPACE

src/gui/kernel/qevent.h

@@ -905,6 +905,16 @@ private:
     Qt::ScreenOrientation m_orientation;
 };
 
+class Q_GUI_EXPORT QApplicationStateChangeEvent : public QEvent
+{
+public:
+    explicit QApplicationStateChangeEvent(Qt::ApplicationState state);
+    Qt::ApplicationState applicationState() const;
+
+private:
+    Qt::ApplicationState m_applicationState;
+};
+
 QT_END_NAMESPACE
 
 #endif // QEVENT_H

src/gui/kernel/qguiapplication.cpp

@@ -1604,6 +1604,8 @@ void QGuiApplicationPrivate::processActivatedEvent(QWindowSystemInterfacePrivate
     } else if (!platformIntegration()->hasCapability(QPlatformIntegration::ApplicationState)) {
         QEvent appActivate(QEvent::ApplicationActivate);
         qApp->sendSpontaneousEvent(qApp, &appActivate);
+        QApplicationStateChangeEvent appState(Qt::ApplicationActive);
+        qApp->sendSpontaneousEvent(qApp, &appState);
     }
 
     if (QGuiApplicationPrivate::focus_window) {
@@ -1614,6 +1616,8 @@ void QGuiApplicationPrivate::processActivatedEvent(QWindowSystemInterfacePrivate
     } else if (!platformIntegration()->hasCapability(QPlatformIntegration::ApplicationState)) {
         QEvent appActivate(QEvent::ApplicationDeactivate);
         qApp->sendSpontaneousEvent(qApp, &appActivate);
+        QApplicationStateChangeEvent appState(Qt::ApplicationInactive);
+        qApp->sendSpontaneousEvent(qApp, &appState);
     }
 
     if (self) {
@@ -1653,6 +1657,9 @@ void QGuiApplicationPrivate::processApplicationStateChangedEvent(QWindowSystemIn
     default:
         break;
     }
+
+    QApplicationStateChangeEvent event(applicationState);
+    qApp->sendSpontaneousEvent(qApp, &event);
 }
 
 void QGuiApplicationPrivate::processThemeChanged(QWindowSystemInterfacePrivate::ThemeChangeEvent *tce)