Multiple screen support for Symbian in QDeskopWidget.

When using TV-out, the TV display can be used as an independent screen.
By default the content shown there is a clone of the device screen,
however from now on parenting a widget to QDesktopWidget::screen(1)
and calling show() will turn off cloning and have the widget shown
instead. screenCount() and the screenCountChanged signal can be used
to detect the availability of the secondary display, just like on other
platforms.

Task-number: QT-830

Reviewed-by: Sami Merila
Reviewed-by: Jani Hautakangas

6 files changed, 279 insertions, 42 deletions

diff --git a/src/gui/kernel/qapplication_s60.cpp b/src/gui/kernel/qapplication_s60.cpp
index 02560b3..86d4fcf 100644
--- a/src/gui/kernel/qapplication_s60.cpp
+++ b/src/gui/kernel/qapplication_s60.cpp
@@ -405,6 +405,7 @@ QSymbianControl::QSymbianControl(QWidget *w)
     , m_longTapDetector(0)
     , m_ignoreFocusChanged(0)
     , m_symbianPopupIsOpen(0)
+    , m_inExternalScreenOverride(false)
 {
 }
 
@@ -412,9 +413,11 @@ void QSymbianControl::ConstructL(bool isWindowOwning, bool desktop)
 {
     if (!desktop)
     {
-        if (isWindowOwning || !qwidget->parentWidget())
-            CreateWindowL(S60->windowGroup());
-        else
+        if (isWindowOwning || !qwidget->parentWidget()
+            || qwidget->parentWidget()->windowType() == Qt::Desktop) {
+            RWindowGroup &wg(S60->windowGroup(qwidget));
+            CreateWindowL(wg);
+        } else {
             /**
              * TODO: in order to avoid creating windows for all ancestors of
              * this widget up to the root window, the parameter passed to
@@ -424,6 +427,7 @@ void QSymbianControl::ConstructL(bool isWindowOwning, bool desktop)
              * is created for a widget between this one and the root window.
              */
             CreateWindowL(qwidget->parentWidget()->winId());
+        }
 
         // Necessary in order to be able to track the activation status of
         // the control's window
@@ -456,7 +460,7 @@ void QSymbianControl::ConstructL(bool isWindowOwning, bool desktop)
             windowPurpose = ETfxPurposeSplashScreenWindow;
             break;
         default:
-            windowPurpose = (isWindowOwning || !qwidget->parentWidget())
+            windowPurpose = (isWindowOwning || !qwidget->parentWidget() || qwidget->parentWidget()->windowType() == Qt::Desktop)
                             ? ETfxPurposeWindow : ETfxPurposeChildWindow;
             break;
         }
@@ -987,14 +991,15 @@ TKeyResponse QSymbianControl::handleVirtualMouse(const TKeyEvent& keyEvent,TEven
                 }
             }
             //clip to screen size (window server allows a sprite hotspot to be outside the screen)
+            int screenNumber = S60->screenNumberForWidget(qwidget);
             if (x < 0)
                 x = 0;
-            else if (x >= S60->screenWidthInPixels)
-                x = S60->screenWidthInPixels - 1;
+            else if (x >= S60->screenWidthInPixelsForScreen[screenNumber])
+                x = S60->screenWidthInPixelsForScreen[screenNumber] - 1;
             if (y < 0)
                 y = 0;
-            else if (y >= S60->screenHeightInPixels)
-                y = S60->screenHeightInPixels - 1;
+            else if (y >= S60->screenHeightInPixelsForScreen[screenNumber])
+                y = S60->screenHeightInPixelsForScreen[screenNumber] - 1;
             TPoint epos(x, y);
             TPoint cpos = epos - PositionRelativeToScreen();
             fakeEvent.iPosition = cpos;
@@ -1171,6 +1176,18 @@ void QSymbianControl::SizeChanged()
     QSize newSize(Size().iWidth, Size().iHeight);
 
     if (oldSize != newSize) {
+        const bool isFullscreen = qwidget->windowState() & Qt::WindowFullScreen;
+        const int screenNumber = S60->screenNumberForWidget(qwidget);
+        if (!m_inExternalScreenOverride && isFullscreen && screenNumber > 0) {
+            int screenWidth = S60->screenWidthInPixelsForScreen[screenNumber];
+            int screenHeight = S60->screenHeightInPixelsForScreen[screenNumber];
+            TSize screenSize(screenWidth, screenHeight);
+            if (screenWidth > 0 && screenHeight > 0 && screenSize != Size()) {
+                m_inExternalScreenOverride = true;
+                SetExtent(TPoint(0, 0), screenSize);
+                return;
+            }
+        }
         QRect cr = qwidget->geometry();
         cr.setSize(newSize);
         qwidget->data->crect = cr;
@@ -1193,6 +1210,8 @@ void QSymbianControl::SizeChanged()
         }
     }
 
+    m_inExternalScreenOverride = false;
+
     // CCoeControl::SetExtent calls SizeChanged, but does not call
     // PositionChanged, so we call it here to ensure that the widget's
     // position is updated.
@@ -2035,7 +2054,8 @@ int QApplicationPrivate::symbianProcessWsEvent(const QSymbianEvent *symbianEvent
             return 1;
         }
         break;
-    case EEventScreenDeviceChanged:
+    case EEventScreenDeviceChanged: // fallthrough
+    case EEventDisplayChanged:
         if (callSymbianEventFilters(symbianEvent))
             return 1;
         if (S60)
diff --git a/src/gui/kernel/qdesktopwidget_s60.cpp b/src/gui/kernel/qdesktopwidget_s60.cpp
index 3653ae2..9d48b64 100644
--- a/src/gui/kernel/qdesktopwidget_s60.cpp
+++ b/src/gui/kernel/qdesktopwidget_s60.cpp
@@ -44,36 +44,67 @@
 #include "qwidget_p.h"
 #include "qt_s60_p.h"
 #include <w32std.h>
-
-#include "hal.h"
-#include "hal_data.h"
+#if defined(Q_SYMBIAN_SUPPORTS_MULTIPLE_SCREENS)
+#include <graphics/displaycontrol.h>
+#endif
 
 QT_BEGIN_NAMESPACE
 
-class QDesktopWidgetPrivate : public QWidgetPrivate
+extern int qt_symbian_create_desktop_on_screen;
+
+class QSingleDesktopWidget : public QWidget
+{
+public:
+    QSingleDesktopWidget();
+    ~QSingleDesktopWidget();
+};
+
+QSingleDesktopWidget::QSingleDesktopWidget()
+    : QWidget(0, Qt::Desktop)
+{
+}
+
+QSingleDesktopWidget::~QSingleDesktopWidget()
 {
+    const QObjectList &childList = children();
+    for (int i = childList.size(); i > 0 ;) {
+        --i;
+        childList.at(i)->setParent(0);
+    }
+}
 
+class QDesktopWidgetPrivate : public QWidgetPrivate
+{
 public:
     QDesktopWidgetPrivate();
     ~QDesktopWidgetPrivate();
-
     static void init(QDesktopWidget *that);
     static void cleanup();
+    static void init_sys();
 
     static int screenCount;
     static int primaryScreen;
 
     static QVector<QRect> *rects;
     static QVector<QRect> *workrects;
+    static QVector<QWidget *> *screens;
 
     static int refcount;
+
+#if defined(Q_SYMBIAN_SUPPORTS_MULTIPLE_SCREENS)
+    static MDisplayControl *displayControl;
+#endif
 };
 
 int QDesktopWidgetPrivate::screenCount = 1;
 int QDesktopWidgetPrivate::primaryScreen = 0;
 QVector<QRect> *QDesktopWidgetPrivate::rects = 0;
 QVector<QRect> *QDesktopWidgetPrivate::workrects = 0;
+QVector<QWidget *> *QDesktopWidgetPrivate::screens = 0;
 int QDesktopWidgetPrivate::refcount = 0;
+#if defined(Q_SYMBIAN_SUPPORTS_MULTIPLE_SCREENS)
+MDisplayControl *QDesktopWidgetPrivate::displayControl = 0;
+#endif
 
 QDesktopWidgetPrivate::QDesktopWidgetPrivate()
 {
@@ -88,25 +119,53 @@ QDesktopWidgetPrivate::~QDesktopWidgetPrivate()
 
 void QDesktopWidgetPrivate::init(QDesktopWidget *that)
 {
-    Q_UNUSED(that);
-//    int screenCount=0;
-
-    // ### TODO: Implement proper multi-display support
-	QDesktopWidgetPrivate::screenCount = 1;
-//    if (HAL::Get(0, HALData::EDisplayNumberOfScreens, screenCount) == KErrNone)
-//        QDesktopWidgetPrivate::screenCount = screenCount;
-//    else
-//        QDesktopWidgetPrivate::screenCount = 0;
+    // Note that on S^3 devices the screen count retrieved via RWsSession
+    // will always be 2 but the width and height for screen number 1 will
+    // be 0 as long as TV-out is not connected.
+    //
+    // On the other hand a valid size for screen 1 will be reported even
+    // after the cable is disconnected. In order to overcome this, we use
+    // MDisplayControl::NumberOfResolutions() to check if the display is
+    // valid or not.
+
+    screenCount = S60->screenCount();
+    if (displayControl) {
+        if (displayControl->NumberOfResolutions() < 1)
+            screenCount = 1;
+    }
+    if (screenCount < 1) {
+        qWarning("No screen available");
+        screenCount = 1;
+    }
 
     rects = new QVector<QRect>();
     workrects = new QVector<QRect>();
-
-    rects->resize(QDesktopWidgetPrivate::screenCount);
-    workrects->resize(QDesktopWidgetPrivate::screenCount);
-
-    (*rects)[0].setRect(0, 0, S60->screenWidthInPixels, S60->screenHeightInPixels);
-    QRect wr = qt_TRect2QRect(static_cast<CEikAppUi*>(S60->appUi())->ClientRect());
-    (*workrects)[0].setRect(wr.x(), wr.y(), wr.width(), wr.height());
+    screens = new QVector<QWidget *>();
+
+    rects->resize(screenCount);
+    workrects->resize(screenCount);
+    screens->resize(screenCount);
+
+    for (int i = 0; i < screenCount; ++i) {
+        // All screens will share the same geometry as there is no true virtual desktop
+        // or pointer event support for multiple screens on Symbian.
+        QRect r(0, 0,
+            S60->screenWidthInPixelsForScreen[i], S60->screenHeightInPixelsForScreen[i]);
+        // Stop here if empty and ignore this screen.
+        if (r.isEmpty()) {
+            screenCount = i;
+            break;
+        }
+        (*rects)[i] = r;
+        QRect wr;
+        if (i == 0)
+            wr = qt_TRect2QRect(static_cast<CEikAppUi*>(S60->appUi())->ClientRect());
+        else
+            wr = rects->at(i);
+        (*workrects)[i].setRect(wr.x(), wr.y(), wr.width(), wr.height());
+        (*screens)[i] = 0;
+    }
+    (*screens)[0] = that;
 }
 
 void QDesktopWidgetPrivate::cleanup()
@@ -115,6 +174,27 @@ void QDesktopWidgetPrivate::cleanup()
     rects = 0;
     delete workrects;
     workrects = 0;
+    if (screens) {
+        // First item is the QDesktopWidget so skip it.
+        for (int i = 1; i < screens->count(); ++i)
+            delete screens->at(i);
+    }
+    delete screens;
+    screens = 0;
+}
+
+void QDesktopWidgetPrivate::init_sys()
+{
+#if defined(Q_SYMBIAN_SUPPORTS_MULTIPLE_SCREENS)
+    CWsScreenDevice *dev = S60->screenDevice(1);
+    if (dev) {
+        displayControl = static_cast<MDisplayControl *>(
+                    dev->GetInterface(MDisplayControl::ETypeId));
+        if (displayControl) {
+            displayControl->EnableDisplayChangeEvents(ETrue);
+        }
+    }
+#endif
 }
 
 
@@ -122,6 +202,7 @@ QDesktopWidget::QDesktopWidget()
     : QWidget(*new QDesktopWidgetPrivate, 0, Qt::Desktop)
 {
     setObjectName(QLatin1String("desktop"));
+    QDesktopWidgetPrivate::init_sys();
     QDesktopWidgetPrivate::init(this);
 }
 
@@ -131,7 +212,7 @@ QDesktopWidget::~QDesktopWidget()
 
 bool QDesktopWidget::isVirtualDesktop() const
 {
-    return true;
+    return false;
 }
 
 int QDesktopWidget::primaryScreen() const
@@ -145,9 +226,23 @@ int QDesktopWidget::numScreens() const
     return QDesktopWidgetPrivate::screenCount;
 }
 
-QWidget *QDesktopWidget::screen(int /* screen */)
+static inline QWidget *newSingleDesktopWidget(int screen)
 {
-    return this;
+    qt_symbian_create_desktop_on_screen = screen;
+    QWidget *w = new QSingleDesktopWidget;
+    qt_symbian_create_desktop_on_screen = -1;
+    return w;
+}
+
+QWidget *QDesktopWidget::screen(int screen)
+{
+    Q_D(QDesktopWidget);
+    if (screen < 0 || screen >= d->screenCount)
+        screen = d->primaryScreen;
+    if (!d->screens->at(screen)
+        || d->screens->at(screen)->windowType() != Qt::Desktop)
+        (*d->screens)[screen] = newSingleDesktopWidget(screen);
+    return (*d->screens)[screen];
 }
 
 const QRect QDesktopWidget::availableGeometry(int screen) const
@@ -168,14 +263,19 @@ const QRect QDesktopWidget::screenGeometry(int screen) const
     return d->rects->at(screen);
 }
 
-int QDesktopWidget::screenNumber(const QWidget * /* widget */) const
+int QDesktopWidget::screenNumber(const QWidget *widget) const
 {
-    return QDesktopWidgetPrivate::primaryScreen;
+    Q_D(const QDesktopWidget);
+    return widget
+        ? S60->screenNumberForWidget(widget)
+        : d->primaryScreen;
 }
 
-int QDesktopWidget::screenNumber(const QPoint & /* point */) const
+int QDesktopWidget::screenNumber(const QPoint &point) const
 {
-    return QDesktopWidgetPrivate::primaryScreen;
+    Q_UNUSED(point);
+    Q_D(const QDesktopWidget);
+    return d->primaryScreen;
 }
 
 void QDesktopWidget::resizeEvent(QResizeEvent *)
@@ -203,6 +303,10 @@ void QDesktopWidget::resizeEvent(QResizeEvent *)
         if (oldrect != newrect)
             emit workAreaResized(j);
     }
+
+    if (oldscreencount != d->screenCount) {
+        emit screenCountChanged(d->screenCount);
+    }
 }
 
 QT_END_NAMESPACE
diff --git a/src/gui/kernel/qt_s60_p.h b/src/gui/kernel/qt_s60_p.h
index 1e9967f..3bb27c3 100644
--- a/src/gui/kernel/qt_s60_p.h
+++ b/src/gui/kernel/qt_s60_p.h
@@ -64,6 +64,7 @@
 #include "qapplication.h"
 #include "qelapsedtimer.h"
 #include "QtCore/qthreadstorage.h"
+#include "qwidget_p.h"
 #include <w32std.h>
 #include <coecntrl.h>
 #include <eikenv.h>
@@ -84,6 +85,8 @@ QT_BEGIN_NAMESPACE
 // system events seems to start with 0x10
 const TInt KInternalStatusPaneChange = 0x50000000;
 
+static const int qt_symbian_max_screens = 4;
+
 //this macro exists because EColor16MAP enum value doesn't exist in Symbian OS 9.2
 #define Q_SYMBIAN_ECOLOR16MAP TDisplayMode(13)
 
@@ -157,8 +160,14 @@ public:
 
     static inline void updateScreenSize();
     inline RWsSession& wsSession();
+    static inline int screenCount();
     static inline RWindowGroup& windowGroup();
+    static inline RWindowGroup& windowGroup(const QWidget *widget);
+    static inline RWindowGroup& windowGroup(int screenNumber);
     inline CWsScreenDevice* screenDevice();
+    inline CWsScreenDevice* screenDevice(const QWidget *widget);
+    inline CWsScreenDevice* screenDevice(int screenNumber);
+    static inline int screenNumberForWidget(const QWidget *widget);
     static inline CCoeAppUi* appUi();
     static inline CEikMenuBar* menuBar();
 #ifdef Q_WS_S60
@@ -175,6 +184,11 @@ public:
 #ifdef Q_OS_SYMBIAN
     TTrapHandler *s60InstalledTrapHandler;
 #endif
+
+    int screenWidthInPixelsForScreen[qt_symbian_max_screens];
+    int screenHeightInPixelsForScreen[qt_symbian_max_screens];
+    int screenWidthInTwipsForScreen[qt_symbian_max_screens];
+    int screenHeightInTwipsForScreen[qt_symbian_max_screens];
 };
 
 Q_AUTOTEST_EXPORT QS60Data* qGlobalS60Data();
@@ -274,6 +288,8 @@ private:
     // Fader object used to fade everything except this menu and the CBA.
     TAknPopupFader popupFader;
 #endif
+
+    bool m_inExternalScreenOverride : 1;
 };
 
 inline QS60Data::QS60Data()
@@ -325,6 +341,17 @@ inline void QS60Data::updateScreenSize()
     S60->defaultDpiY = S60->screenHeightInPixels / inches;
     inches = S60->screenWidthInTwips / (TReal)KTwipsPerInch;
     S60->defaultDpiX = S60->screenWidthInPixels / inches;
+
+    int screens = S60->screenCount();
+    for (int i = 0; i < screens; ++i) {
+        CWsScreenDevice *dev = S60->screenDevice(i);
+        mode = dev->CurrentScreenMode();
+        dev->GetScreenModeSizeAndRotation(mode, params);
+        S60->screenWidthInPixelsForScreen[i] = params.iPixelSize.iWidth;
+        S60->screenHeightInPixelsForScreen[i] = params.iPixelSize.iHeight;
+        S60->screenWidthInTwipsForScreen[i] = params.iTwipsSize.iWidth;
+        S60->screenHeightInTwipsForScreen[i] = params.iTwipsSize.iHeight;
+    }
 }
 
 inline RWsSession& QS60Data::wsSession()
@@ -335,11 +362,38 @@ inline RWsSession& QS60Data::wsSession()
     return tls.localData()->wsSession;
 }
 
+inline int QS60Data::screenCount()
+{
+#if defined(Q_SYMBIAN_SUPPORTS_MULTIPLE_SCREENS)
+    CCoeEnv *env = CCoeEnv::Static();
+    if (env) {
+        return qMin(env->WsSession().NumberOfScreens(), qt_symbian_max_screens);
+    }
+#endif
+    return 1;
+}
+
 inline RWindowGroup& QS60Data::windowGroup()
 {
     return CCoeEnv::Static()->RootWin();
 }
 
+inline RWindowGroup& QS60Data::windowGroup(const QWidget *widget)
+{
+    return windowGroup(screenNumberForWidget(widget));
+}
+
+inline RWindowGroup& QS60Data::windowGroup(int screenNumber)
+{
+#if defined(Q_SYMBIAN_SUPPORTS_MULTIPLE_SCREENS)
+    RWindowGroup *wg = CCoeEnv::Static()->RootWin(screenNumber);
+    return wg ? *wg : windowGroup();
+#else
+    Q_UNUSED(screenNumber);
+    return windowGroup();
+#endif
+}
+
 inline CWsScreenDevice* QS60Data::screenDevice()
 {
     if(!tls.hasLocalData()) {
@@ -348,6 +402,36 @@ inline CWsScreenDevice* QS60Data::screenDevice()
     return tls.localData()->screenDevice;
 }
 
+inline CWsScreenDevice* QS60Data::screenDevice(const QWidget *widget)
+{
+    return screenDevice(screenNumberForWidget(widget));
+}
+
+inline CWsScreenDevice* QS60Data::screenDevice(int screenNumber)
+{
+#if defined(Q_SYMBIAN_SUPPORTS_MULTIPLE_SCREENS)
+    CCoeEnv *env = CCoeEnv::Static();
+    if (env) {
+        CWsScreenDevice *dev = env->ScreenDevice(screenNumber);
+        return dev ? dev : screenDevice();
+    } else {
+        return screenDevice();
+    }
+#else
+    return screenDevice();
+#endif
+}
+
+inline int QS60Data::screenNumberForWidget(const QWidget *widget)
+{
+    if (!widget)
+        return 0;
+    const QWidget *w = widget;
+    while (w->parentWidget())
+        w = w->parentWidget();
+    return qt_widget_private(const_cast<QWidget *>(w))->symbianScreenNumber;
+}
+
 inline CCoeAppUi* QS60Data::appUi()
 {
     return CCoeEnv::Static()-> AppUi();
diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index 7065e85..1786e65 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -304,6 +304,8 @@ QWidgetPrivate::QWidgetPrivate(int version)
       , hasAlienChildren(0)
       , window_event(0)
       , qd_hd(0)
+#elif defined(Q_OS_SYMBIAN)
+      , symbianScreenNumber(0)
 #endif
 {
     if (!qApp) {
@@ -1284,6 +1286,10 @@ void QWidgetPrivate::init(QWidget *parentWidget, Qt::WindowFlags f)
         // programmer specified desktop widget
         xinfo = desktopWidget->d_func()->xinfo;
     }
+#elif defined(Q_OS_SYMBIAN)
+    if (desktopWidget) {
+        symbianScreenNumber = qt_widget_private(desktopWidget)->symbianScreenNumber;
+    }
 #else
     Q_UNUSED(desktopWidget);
 #endif
diff --git a/src/gui/kernel/qwidget_p.h b/src/gui/kernel/qwidget_p.h
index 9f6ba6f..5235dc4 100644
--- a/src/gui/kernel/qwidget_p.h
+++ b/src/gui/kernel/qwidget_p.h
@@ -877,6 +877,7 @@ public:
 #elif defined(Q_OS_SYMBIAN) // <--------------------------------------------------------- SYMBIAN
     static QWidget *mouseGrabber;
     static QWidget *keyboardGrabber;
+    int symbianScreenNumber; // only valid for desktop widget and top-levels
     void s60UpdateIsOpaque();
     void reparentChildren();
     void registerTouchWindow();
diff --git a/src/gui/kernel/qwidget_s60.cpp b/src/gui/kernel/qwidget_s60.cpp
index af9ae47..be212fb 100644
--- a/src/gui/kernel/qwidget_s60.cpp
+++ b/src/gui/kernel/qwidget_s60.cpp
@@ -84,6 +84,8 @@ QWidget *QWidgetPrivate::mouseGrabber = 0;
 QWidget *QWidgetPrivate::keyboardGrabber = 0;
 CEikButtonGroupContainer *QS60Data::cba = 0;
 
+int qt_symbian_create_desktop_on_screen = -1;
+
 static bool isEqual(const QList<QAction*>& a, const QList<QAction*>& b)
 {
     if ( a.count() != b.count())
@@ -349,12 +351,18 @@ void QWidgetPrivate::create_sys(WId window, bool /* initializeWindow */, bool de
     int sh = clientRect.Height();
 
     if (desktop) {
-        TSize screenSize = S60->screenDevice()->SizeInPixels();
+        symbianScreenNumber = qMax(qt_symbian_create_desktop_on_screen, 0);
+        TSize screenSize = S60->screenDevice(symbianScreenNumber)->SizeInPixels();
         data.crect.setRect(0, 0, screenSize.iWidth, screenSize.iHeight);
         q->setAttribute(Qt::WA_DontShowOnScreen);
     } else if (topLevel && !q->testAttribute(Qt::WA_Resized)){
         int width = sw;
         int height = sh;
+        if (symbianScreenNumber > 0) {
+            TSize screenSize = S60->screenDevice(symbianScreenNumber)->SizeInPixels();
+            width = screenSize.iWidth;
+            height = screenSize.iHeight;
+        }
         if (extra) {
             width = qMax(qMin(width, extra->maxw), extra->minw);
             height = qMax(qMin(height, extra->maxh), extra->minh);
@@ -640,7 +648,7 @@ void QWidgetPrivate::raise_sys()
 
         // If toplevel widget, raise app to foreground
         if (q->isWindow())
-            S60->wsSession().SetWindowGroupOrdinalPosition(S60->windowGroup().Identifier(), 0);
+            S60->wsSession().SetWindowGroupOrdinalPosition(S60->windowGroup(q).Identifier(), 0);
     }
 }
 
@@ -652,7 +660,7 @@ void QWidgetPrivate::lower_sys()
     if (q->internalWinId()) {
         // If toplevel widget, lower app to background
         if (q->isWindow())
-            S60->wsSession().SetWindowGroupOrdinalPosition(S60->windowGroup().Identifier(), -1);
+            S60->wsSession().SetWindowGroupOrdinalPosition(S60->windowGroup(q).Identifier(), -1);
         else
             q->internalWinId()->DrawableWindow()->SetOrdinalPosition(-1);
     }
@@ -722,6 +730,11 @@ void QWidgetPrivate::setParent_sys(QWidget *parent, Qt::WindowFlags f)
 {
     Q_Q(QWidget);
 
+    if (parent && parent->windowType() == Qt::Desktop) {
+        symbianScreenNumber = qt_widget_private(parent)->symbianScreenNumber;
+        parent = 0;
+    }
+
     bool wasCreated = q->testAttribute(Qt::WA_WState_Created);
 
     if (q->isVisible() && q->parentWidget() && parent != q->parentWidget())
@@ -1037,7 +1050,7 @@ int QWidget::metric(PaintDeviceMetric m) const
     } else if (m == PdmHeight) {
         val = data->crect.height();
     } else {
-        CWsScreenDevice *scr = S60->screenDevice();
+        CWsScreenDevice *scr = S60->screenDevice(this);
         switch(m) {
         case PdmDpiX:
         case PdmPhysicalDpiX:
@@ -1207,7 +1220,16 @@ void QWidget::setWindowState(Qt::WindowStates newstate)
         const bool cbaVisibilityHint = windowFlags() & Qt::WindowSoftkeysVisibleHint;
         if (newstate & Qt::WindowFullScreen && !cbaVisibilityHint) {
             setAttribute(Qt::WA_OutsideWSRange, false);
-            window->SetExtentToWholeScreen();
+            if (d->symbianScreenNumber > 0) {
+                int w = S60->screenWidthInPixelsForScreen[d->symbianScreenNumber];
+                int h = S60->screenHeightInPixelsForScreen[d->symbianScreenNumber];
+                if (w <= 0 || h <= 0)
+                    window->SetExtentToWholeScreen();
+                else
+                    window->SetExtent(TPoint(0, 0), TSize(w, h));
+            } else {
+                window->SetExtentToWholeScreen();
+            }
         } else if (newstate & Qt::WindowMaximized || ((newstate & Qt::WindowFullScreen) && cbaVisibilityHint)) {
             setAttribute(Qt::WA_OutsideWSRange, false);
             TRect maxExtent = qt_QRect2TRect(qApp->desktop()->availableGeometry(this));