Switched to asynchronous focus handling on Symbian.

This was done in order to be more in line with what other platforms
(at least X11) do. In addition, it prevents show() from entering
event handlers in Qt. That should only happen in processEvents().

This required the introduction of a new event,
SymbianDeferredFocusChanged, which we post whenever there is a focus
change.

RevBy:    Jason Barron
AutoTest: Passed

6 files changed, 40 insertions, 14 deletions

diff --git a/src/corelib/kernel/qcoreevent.cpp b/src/corelib/kernel/qcoreevent.cpp
index 01b310b..b1c01ca 100644
--- a/src/corelib/kernel/qcoreevent.cpp
+++ b/src/corelib/kernel/qcoreevent.cpp
@@ -266,6 +266,7 @@ QT_BEGIN_NAMESPACE
     \omitvalue NetworkReplyUpdated
     \omitvalue FutureCallOut
     \omitvalue CocoaRequestModal
+    \omitvalue SymbianDeferredFocusChanged
 */
 
 /*!
diff --git a/src/corelib/kernel/qcoreevent.h b/src/corelib/kernel/qcoreevent.h
index d896ad5..e88525a 100644
--- a/src/corelib/kernel/qcoreevent.h
+++ b/src/corelib/kernel/qcoreevent.h
@@ -269,6 +269,8 @@ public:
         RequestSoftwareInputPanel = 192,
         CloseSoftwareInputPanel = 193,
 
+        SymbianDeferredFocusChanged = 194,       // Internal for generating asynchronous focus events on Symbian
+
         // 512 reserved for Qt Jambi's MetaCall event
         // 513 reserved for Qt Jambi's DeleteOnMainThread event
 
diff --git a/src/gui/kernel/qapplication_s60.cpp b/src/gui/kernel/qapplication_s60.cpp
index b954ddb..dd05806 100644
--- a/src/gui/kernel/qapplication_s60.cpp
+++ b/src/gui/kernel/qapplication_s60.cpp
@@ -659,20 +659,8 @@ void QSymbianControl::FocusChanged(TDrawNow /* aDrawNow */)
             || (qwidget->windowType() & Qt::Popup) == Qt::Popup)
         return;
 
-    if (IsFocused()) {
-        QApplication::setActiveWindow(qwidget);
-        // If widget is fullscreen, hide status pane and button container
-        // otherwise show them.
-        CEikStatusPane* statusPane = S60->statusPane();
-        CEikButtonGroupContainer* buttonGroup = S60->buttonGroupContainer();
-        bool isFullscreen = qwidget->windowState() & Qt::WindowFullScreen;
-        if (statusPane && (statusPane->IsVisible() == isFullscreen))
-            statusPane->MakeVisible(!isFullscreen);
-        if (buttonGroup && (buttonGroup->IsVisible() == isFullscreen))
-            buttonGroup->MakeVisible(!isFullscreen);
-    } else {
-        QApplication::setActiveWindow(0);
-    }
+    QEvent *deferredFocusEvent = new QEvent(QEvent::SymbianDeferredFocusChanged);
+    QApplication::postEvent(qwidget, deferredFocusEvent);
 }
 
 void QSymbianControl::HandleResourceChange(int resourceType)
diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index baacdf5..f1094c5 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -8018,6 +8018,12 @@ bool QWidget::event(QEvent *event)
         d->needWindowChange = false;
         break;
 #endif
+    case QEvent::SymbianDeferredFocusChanged: {
+#ifdef Q_OS_SYMBIAN
+        d->handleSymbianDeferredFocusChanged();
+#endif
+        break;
+    }
 #ifndef QT_NO_PROPERTIES
     case QEvent::DynamicPropertyChange: {
         const QByteArray &propName = static_cast<QDynamicPropertyChangeEvent *>(event)->propertyName();
diff --git a/src/gui/kernel/qwidget_p.h b/src/gui/kernel/qwidget_p.h
index 0ad0255..24e7503 100644
--- a/src/gui/kernel/qwidget_p.h
+++ b/src/gui/kernel/qwidget_p.h
@@ -279,6 +279,9 @@ public:
 #ifdef Q_WS_S60
     void s60UpdateIsOpaque();
 #endif
+#ifdef Q_OS_SYMBIAN
+    void handleSymbianDeferredFocusChanged();
+#endif
 
     void raise_sys();
     void lower_sys();
diff --git a/src/gui/kernel/qwidget_s60.cpp b/src/gui/kernel/qwidget_s60.cpp
index c8bca6e..3c7e424 100644
--- a/src/gui/kernel/qwidget_s60.cpp
+++ b/src/gui/kernel/qwidget_s60.cpp
@@ -421,6 +421,32 @@ void QWidgetPrivate::setFocus_sys()
             q->effectiveWinId()->SetFocus(true);
 }
 
+void QWidgetPrivate::handleSymbianDeferredFocusChanged()
+{
+    Q_Q(QWidget);
+    WId control = q->internalWinId();
+    if (!control) {
+        // This could happen if the widget was reparented, while the focuschange
+        // was in the event queue.
+        return;
+    }
+
+    if (control->IsFocused()) {
+        QApplication::setActiveWindow(q);
+        // If widget is fullscreen, hide status pane and button container
+        // otherwise show them.
+        CEikStatusPane* statusPane = S60->statusPane();
+        CEikButtonGroupContainer* buttonGroup = S60->buttonGroupContainer();
+        bool isFullscreen = q->windowState() & Qt::WindowFullScreen;
+        if (statusPane && (statusPane->IsVisible() == isFullscreen))
+            statusPane->MakeVisible(!isFullscreen);
+        if (buttonGroup && (buttonGroup->IsVisible() == isFullscreen))
+            buttonGroup->MakeVisible(!isFullscreen);
+    } else {
+        QApplication::setActiveWindow(0);
+    }
+}
+
 void QWidgetPrivate::raise_sys()
 {
     Q_Q(QWidget);