Merge branch '4.7-review' into 4.7-staging

18 files changed, 1135 insertions, 133 deletions

diff --git a/src/gui/graphicsview/qgraphicslayout.cpp b/src/gui/graphicsview/qgraphicslayout.cpp
index ed213f1..e50989c 100644
--- a/src/gui/graphicsview/qgraphicslayout.cpp
+++ b/src/gui/graphicsview/qgraphicslayout.cpp
@@ -167,7 +167,7 @@ QGraphicsLayout::QGraphicsLayout(QGraphicsLayoutItem *parent)
                     " neither a QGraphicsWidget nor QGraphicsLayout");
         }
     }
-    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding, QSizePolicy::DefaultType);
+    d_func()->sizePolicy = QSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding, QSizePolicy::DefaultType);
     setOwnedByLayout(true);
 }
 
@@ -188,7 +188,7 @@ QGraphicsLayout::QGraphicsLayout(QGraphicsLayoutPrivate &dd, QGraphicsLayoutItem
                     " neither a QGraphicsWidget nor QGraphicsLayout");
         }
     }
-    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding, QSizePolicy::DefaultType);
+    d_func()->sizePolicy = QSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding, QSizePolicy::DefaultType);
     setOwnedByLayout(true);
 }
 
@@ -269,12 +269,20 @@ void QGraphicsLayout::activate()
         return;
     Q_ASSERT(!parentItem->isLayout());
 
-    setGeometry(parentItem->contentsRect());    // relayout children
-    
-    // ### bug, should be parentItem ?
-    parentLayoutItem()->updateGeometry();            // bubble up; will set activated to false
-    // ### too many resizes? maybe we should walk up the chain to the
-    // ### top-level layouted layoutItem and call activate there.
+    if (QGraphicsLayout::instantInvalidatePropagation()) {
+        QGraphicsWidget *parentWidget = static_cast<QGraphicsWidget*>(parentItem);
+        if (!parentWidget->parentLayoutItem()) {
+            // we've reached the topmost widget, resize it
+            bool wasResized = parentWidget->testAttribute(Qt::WA_Resized);
+            parentWidget->resize(parentWidget->size());
+            parentWidget->setAttribute(Qt::WA_Resized, wasResized);
+        }
+
+        setGeometry(parentItem->contentsRect());    // relayout children
+    } else {
+        setGeometry(parentItem->contentsRect());    // relayout children
+        parentLayoutItem()->updateGeometry();
+    }
 }
 
 /*!
@@ -300,32 +308,36 @@ bool QGraphicsLayout::isActivated() const
 */
 void QGraphicsLayout::invalidate()
 {
-    // only mark layouts as invalid (activated = false) if we can post a LayoutRequest event.
-    QGraphicsLayoutItem *layoutItem = this;
-    while (layoutItem && layoutItem->isLayout()) {
-        // we could call updateGeometry(), but what if that method
-        // does not call the base implementation? In addition, updateGeometry()
-        // does more than we need.
-        layoutItem->d_func()->sizeHintCacheDirty = true;
-        layoutItem->d_func()->sizeHintWithConstraintCacheDirty = true;
-        layoutItem = layoutItem->parentLayoutItem();
-    }
-    if (layoutItem) {
-        layoutItem->d_func()->sizeHintCacheDirty = true;
-        layoutItem->d_func()->sizeHintWithConstraintCacheDirty = true;
-    }
-
-    bool postIt = layoutItem ? !layoutItem->isLayout() : false;
-    if (postIt) {
-        layoutItem = this;
-        while (layoutItem && layoutItem->isLayout()
-                && static_cast<QGraphicsLayout*>(layoutItem)->d_func()->activated) {
-            static_cast<QGraphicsLayout*>(layoutItem)->d_func()->activated = false;
+    if (QGraphicsLayout::instantInvalidatePropagation()) {
+        updateGeometry();
+    } else {
+        // only mark layouts as invalid (activated = false) if we can post a LayoutRequest event.
+        QGraphicsLayoutItem *layoutItem = this;
+        while (layoutItem && layoutItem->isLayout()) {
+            // we could call updateGeometry(), but what if that method
+            // does not call the base implementation? In addition, updateGeometry()
+            // does more than we need.
+            layoutItem->d_func()->sizeHintCacheDirty = true;
+            layoutItem->d_func()->sizeHintWithConstraintCacheDirty = true;
             layoutItem = layoutItem->parentLayoutItem();
         }
-        if (layoutItem && !layoutItem->isLayout()) {
-            // If a layout has a parent that is not a layout it must be a QGraphicsWidget.
-            QApplication::postEvent(static_cast<QGraphicsWidget *>(layoutItem), new QEvent(QEvent::LayoutRequest));
+        if (layoutItem) {
+            layoutItem->d_func()->sizeHintCacheDirty = true;
+            layoutItem->d_func()->sizeHintWithConstraintCacheDirty = true;
+        }
+
+        bool postIt = layoutItem ? !layoutItem->isLayout() : false;
+        if (postIt) {
+            layoutItem = this;
+            while (layoutItem && layoutItem->isLayout()
+                    && static_cast<QGraphicsLayout*>(layoutItem)->d_func()->activated) {
+                static_cast<QGraphicsLayout*>(layoutItem)->d_func()->activated = false;
+                layoutItem = layoutItem->parentLayoutItem();
+            }
+            if (layoutItem && !layoutItem->isLayout()) {
+                // If a layout has a parent that is not a layout it must be a QGraphicsWidget.
+                QApplication::postEvent(static_cast<QGraphicsWidget *>(layoutItem), new QEvent(QEvent::LayoutRequest));
+            }
         }
     }
 }
@@ -335,12 +347,27 @@ void QGraphicsLayout::invalidate()
 */
 void QGraphicsLayout::updateGeometry()
 {
-    QGraphicsLayoutItem::updateGeometry();
-    if (QGraphicsLayoutItem *parentItem = parentLayoutItem()) {
-        if (parentItem->isLayout()) {
+    Q_D(QGraphicsLayout);
+    if (QGraphicsLayout::instantInvalidatePropagation()) {
+        d->activated = false;
+        QGraphicsLayoutItem::updateGeometry();
+
+        QGraphicsLayoutItem *parentItem = parentLayoutItem();
+        if (!parentItem)
+            return;
+
+        if (parentItem->isLayout())
+            static_cast<QGraphicsLayout *>(parentItem)->invalidate();
+        else
             parentItem->updateGeometry();
-        } else {
-            invalidate();
+    } else {
+        QGraphicsLayoutItem::updateGeometry();
+        if (QGraphicsLayoutItem *parentItem = parentLayoutItem()) {
+            if (parentItem->isLayout()) {
+                parentItem->updateGeometry();
+            } else {
+                invalidate();
+            }
         }
     }
 }
@@ -446,6 +473,50 @@ void QGraphicsLayout::addChildLayoutItem(QGraphicsLayoutItem *layoutItem)
     d->addChildLayoutItem(layoutItem);
 }
 
+static bool g_instantInvalidatePropagation = false;
+
+/*!
+    \internal
+    \since 4.8
+    \see instantInvalidatePropagation
+
+    Calling this function with \a enable set to true will enable a feature that
+    makes propagation of invalidation up to ancestor layout items to be done in
+    one go. It will propagate up the parentLayoutItem() hierarchy until it has
+    reached the root. If the root item is a QGraphicsWidget, it will *post* a
+    layout request to it. When the layout request is consumed it will traverse
+    down the hierarchy of layouts and widgets and activate all layouts that is
+    invalid (not activated). This is the recommended behaviour.
+
+    If not set it will also propagate up the parentLayoutItem() hierarchy, but
+    it will stop at the \i first \i widget it encounters, and post a layout
+    request to the widget. When the layout request is consumed, this might
+    cause it to continue propagation up to the parentLayoutItem() of the
+    widget. It will continue in this fashion until it has reached a widget with
+    no parentLayoutItem(). This strategy might cause drawing artifacts, since
+    it is not done in one go, and the consumption of layout requests might be
+    interleaved by consumption of paint events, which might cause significant
+    flicker.
+    Note, this is not the recommended behavior, but for compatibility reasons
+    this is the default behaviour.
+*/
+void QGraphicsLayout::setInstantInvalidatePropagation(bool enable)
+{
+    g_instantInvalidatePropagation = enable;
+}
+
+/*!
+    \internal
+    \since 4.8
+    \see setInstantInvalidatePropagation
+
+    returns true if the complete widget/layout hierarchy is rearranged in one go.
+*/
+bool QGraphicsLayout::instantInvalidatePropagation()
+{
+    return g_instantInvalidatePropagation;
+}
+
 QT_END_NAMESPACE
 
 #endif //QT_NO_GRAPHICSVIEW
diff --git a/src/gui/graphicsview/qgraphicslayout.h b/src/gui/graphicsview/qgraphicslayout.h
index c622fb8..6031174 100644
--- a/src/gui/graphicsview/qgraphicslayout.h
+++ b/src/gui/graphicsview/qgraphicslayout.h
@@ -76,6 +76,8 @@ public:
     virtual QGraphicsLayoutItem *itemAt(int i) const = 0;
     virtual void removeAt(int index) = 0;
 
+    static void setInstantInvalidatePropagation(bool enable);
+    static bool instantInvalidatePropagation();
 protected:
     QGraphicsLayout(QGraphicsLayoutPrivate &, QGraphicsLayoutItem *);
     void addChildLayoutItem(QGraphicsLayoutItem *layoutItem);
diff --git a/src/gui/graphicsview/qgraphicslayout_p.cpp b/src/gui/graphicsview/qgraphicslayout_p.cpp
index c2d4a08..6afdc19 100644
--- a/src/gui/graphicsview/qgraphicslayout_p.cpp
+++ b/src/gui/graphicsview/qgraphicslayout_p.cpp
@@ -180,8 +180,13 @@ void QGraphicsLayoutPrivate::activateRecursive(QGraphicsLayoutItem *item)
 {
     if (item->isLayout()) {
         QGraphicsLayout *layout = static_cast<QGraphicsLayout *>(item);
-        if (layout->d_func()->activated)
-            layout->invalidate();
+        if (layout->d_func()->activated) {
+            if (QGraphicsLayout::instantInvalidatePropagation()) {
+                return;
+            } else {
+                layout->invalidate();   // ### LOOKS SUSPICIOUSLY WRONG!!???
+            }
+        }
         
         for (int i = layout->count() - 1; i >= 0; --i) {
             QGraphicsLayoutItem *childItem = layout->itemAt(i);
diff --git a/src/gui/graphicsview/qgraphicslinearlayout.cpp b/src/gui/graphicsview/qgraphicslinearlayout.cpp
index 5591638..40f9b1d 100644
--- a/src/gui/graphicsview/qgraphicslinearlayout.cpp
+++ b/src/gui/graphicsview/qgraphicslinearlayout.cpp
@@ -275,17 +275,13 @@ void QGraphicsLinearLayout::insertItem(int index, QGraphicsLayoutItem *item)
         qWarning("QGraphicsLinearLayout::insertItem: cannot insert itself");
         return;
     }
-    Q_ASSERT(item);
-
-    //the order of the following instructions is very important because
-    //invalidating the layout before adding the child item will make the layout happen
-    //before we try to paint the item
-    invalidate();
     d->addChildLayoutItem(item);
 
+    Q_ASSERT(item);
     d->fixIndex(&index);
     d->engine.insertRow(index, d->orientation);
     new QGridLayoutItem(&d->engine, item, d->gridRow(index), d->gridColumn(index), 1, 1, 0, index);
+    invalidate();
 }
 
 /*!
diff --git a/src/gui/graphicsview/qgraphicswidget.cpp b/src/gui/graphicsview/qgraphicswidget.cpp
index 675a5c5..141e305 100644
--- a/src/gui/graphicsview/qgraphicswidget.cpp
+++ b/src/gui/graphicsview/qgraphicswidget.cpp
@@ -354,8 +354,10 @@ void QGraphicsWidget::setGeometry(const QRectF &rect)
         newGeom = rect;
         newGeom.setSize(rect.size().expandedTo(effectiveSizeHint(Qt::MinimumSize))
                                    .boundedTo(effectiveSizeHint(Qt::MaximumSize)));
-        if (newGeom == d->geom)
-            return;
+
+        if (newGeom == d->geom) {
+            goto relayoutChildrenAndReturn;
+        }
 
         // setPos triggers ItemPositionChange, which can adjust position
         wd->inSetGeometry = 1;
@@ -363,8 +365,9 @@ void QGraphicsWidget::setGeometry(const QRectF &rect)
         wd->inSetGeometry = 0;
         newGeom.moveTopLeft(pos());
 
-        if (newGeom == d->geom)
-           return;
+        if (newGeom == d->geom) {
+            goto relayoutChildrenAndReturn;
+        }
 
          // Update and prepare to change the geometry (remove from index) if the size has changed.
         if (wd->scene) {
@@ -375,35 +378,54 @@ void QGraphicsWidget::setGeometry(const QRectF &rect)
     }
 
     // Update the layout item geometry
-    bool moved = oldPos != pos();
-    if (moved) {
-        // Send move event.
-        QGraphicsSceneMoveEvent event;
-        event.setOldPos(oldPos);
-        event.setNewPos(pos());
-        QApplication::sendEvent(this, &event);
-        if (wd->inSetPos) {
-            //set the new pos
-            d->geom.moveTopLeft(pos());
-            emit geometryChanged();
-            return;
+    {
+        bool moved = oldPos != pos();
+        if (moved) {
+            // Send move event.
+            QGraphicsSceneMoveEvent event;
+            event.setOldPos(oldPos);
+            event.setNewPos(pos());
+            QApplication::sendEvent(this, &event);
+            if (wd->inSetPos) {
+                //set the new pos
+                d->geom.moveTopLeft(pos());
+                emit geometryChanged();
+                goto relayoutChildrenAndReturn;
+            }
+        }
+        QSizeF oldSize = size();
+        QGraphicsLayoutItem::setGeometry(newGeom);
+        // Send resize event
+        bool resized = newGeom.size() != oldSize;
+        if (resized) {
+            QGraphicsSceneResizeEvent re;
+            re.setOldSize(oldSize);
+            re.setNewSize(newGeom.size());
+            if (oldSize.width() != newGeom.size().width())
+                emit widthChanged();
+            if (oldSize.height() != newGeom.size().height())
+                emit heightChanged();
+            QGraphicsLayout *lay = wd->layout;
+            if (QGraphicsLayout::instantInvalidatePropagation()) {
+                if (!lay || lay->isActivated()) {
+                    QApplication::sendEvent(this, &re);
+                }
+            } else {
+                QApplication::sendEvent(this, &re);
+            }
         }
     }
-    QSizeF oldSize = size();
-    QGraphicsLayoutItem::setGeometry(newGeom);
-    // Send resize event
-    bool resized = newGeom.size() != oldSize;
-    if (resized) {
-        QGraphicsSceneResizeEvent re;
-        re.setOldSize(oldSize);
-        re.setNewSize(newGeom.size());
-        if (oldSize.width() != newGeom.size().width())
-            emit widthChanged();
-        if (oldSize.height() != newGeom.size().height())
-            emit heightChanged();
-        QApplication::sendEvent(this, &re);
-    }
+
     emit geometryChanged();
+relayoutChildrenAndReturn:
+    if (QGraphicsLayout::instantInvalidatePropagation()) {
+        if (QGraphicsLayout *lay = wd->layout) {
+            if (!lay->isActivated()) {
+                QEvent layoutRequest(QEvent::LayoutRequest);
+                QApplication::sendEvent(this, &layoutRequest);
+            }
+        }
+    }
 }
 
 /*!
@@ -1052,16 +1074,31 @@ void QGraphicsWidget::updateGeometry()
     QGraphicsLayoutItem *parentItem = parentLayoutItem();
 
     if (parentItem && parentItem->isLayout()) {
-        parentItem->updateGeometry();
+        if (QGraphicsLayout::instantInvalidatePropagation()) {
+            static_cast<QGraphicsLayout *>(parentItem)->invalidate();
+        } else {
+            parentItem->updateGeometry();
+        }
     } else {
         if (parentItem) {
+            // This is for custom layouting
             QGraphicsWidget *parentWid = parentWidget();    //###
             if (parentWid->isVisible())
                 QApplication::postEvent(parentWid, new QEvent(QEvent::LayoutRequest));
+        } else {
+            /**
+             * If this is the topmost widget, post a LayoutRequest event to the widget.
+             * When the event is received, it will start flowing all the way down to the leaf
+             * widgets in one go. This will make a relayout flicker-free.
+             */
+            if (QGraphicsLayout::instantInvalidatePropagation())
+                QApplication::postEvent(static_cast<QGraphicsWidget *>(this), new QEvent(QEvent::LayoutRequest));
+        }
+        if (!QGraphicsLayout::instantInvalidatePropagation()) {
+            bool wasResized = testAttribute(Qt::WA_Resized);
+            resize(size()); // this will restrict the size
+            setAttribute(Qt::WA_Resized, wasResized);
         }
-        bool wasResized = testAttribute(Qt::WA_Resized);
-        resize(size()); // this will restrict the size
-        setAttribute(Qt::WA_Resized, wasResized);
     }
 }
 
diff --git a/tests/auto/q3combobox/tst_q3combobox.cpp b/tests/auto/q3combobox/tst_q3combobox.cpp
index 17bd861..825acb2 100644
--- a/tests/auto/q3combobox/tst_q3combobox.cpp
+++ b/tests/auto/q3combobox/tst_q3combobox.cpp
@@ -1004,6 +1004,10 @@ void tst_Q3ComboBox::wheelEvent()
 
 void tst_Q3ComboBox::task231724_clear()
 {
+#ifdef Q_WS_MACX
+    return; // On Mac, we don't use a ListBox for the popup
+#endif
+
     Q3ComboBox box;
     
     for ( int i = 0; i <50; i++ ) {
diff --git a/tests/auto/q3progressbar/tst_q3progressbar.cpp b/tests/auto/q3progressbar/tst_q3progressbar.cpp
index 745e2d5..3a0c3e2 100644
--- a/tests/auto/q3progressbar/tst_q3progressbar.cpp
+++ b/tests/auto/q3progressbar/tst_q3progressbar.cpp
@@ -45,6 +45,7 @@
 #include <qapplication.h>
 #include <qdebug.h>
 #include <q3progressbar.h>
+#include "../../shared/util.h"
 
 //TESTED_CLASS=
 //TESTED_FILES=
@@ -106,7 +107,7 @@ void tst_Q3ProgressBar::setProgress()
 {
     MyCustomProgressBar * m_progressBar = new MyCustomProgressBar();
     m_progressBar->show();
-    QApplication::processEvents();
+    QTest::qWaitForWindowShown(m_progressBar);
 
     //case with total steps = 0
     m_progressBar->setTotalSteps(0);
@@ -114,10 +115,9 @@ void tst_Q3ProgressBar::setProgress()
     m_progressBar->paintNumber = 0;
     m_progressBar->setProgress(m_progressBar->progress() + 1);
     QCOMPARE(oldValue + 1,m_progressBar->progress());
-    QApplication::processEvents();
 
     // It might be > 1 because it is animated.
-    QVERIFY(m_progressBar->paintNumber >= 1);
+    QTRY_VERIFY(m_progressBar->paintNumber >= 1);
     qDebug() << "Animation test: paintNumber =" << m_progressBar->paintNumber;
     
     //standard case
@@ -125,10 +125,9 @@ void tst_Q3ProgressBar::setProgress()
     m_progressBar->setProgress(0);
     m_progressBar->paintNumber = 0;
     m_progressBar->setProgress(m_progressBar->progress() + 1);
-    QApplication::processEvents();
 
     // It might be > 1 because other events might cause painting.
-    QVERIFY(m_progressBar->paintNumber >= 1);
+    QTRY_VERIFY(m_progressBar->paintNumber >= 1);
     qDebug() << "Standard test: paintNumber =" << m_progressBar->paintNumber;
 }
 
diff --git a/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp b/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp
index e7c63d5..447385a 100644
--- a/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp
+++ b/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp
@@ -1091,6 +1091,9 @@ void tst_QGraphicsAnchorLayout::setSpacing()
 #ifdef Q_WS_MAC
     QTest::qWait(200);
 #endif
+
+    // 21x21
+    QCOMPARE(p->size(), QSizeF(41, 41));
     QCOMPARE(a->geometry(), QRectF(0, 0, 20, 20));
     QCOMPARE(b->geometry(), QRectF(21, 0, 20, 20));
     QCOMPARE(c->geometry(), QRectF(0, 21, 41, 20));
diff --git a/tests/auto/qgraphicslayout/tst_qgraphicslayout.cpp b/tests/auto/qgraphicslayout/tst_qgraphicslayout.cpp
index 979f03d..29ea074 100644
--- a/tests/auto/qgraphicslayout/tst_qgraphicslayout.cpp
+++ b/tests/auto/qgraphicslayout/tst_qgraphicslayout.cpp
@@ -62,6 +62,7 @@ private slots:
     void compressLayoutRequest();
     void automaticReparenting();
     void verifyActivate();
+    void invalidate();
     void constructors();
     void alternativeLayoutItems();
     void ownership();
@@ -95,6 +96,14 @@ void tst_QGraphicsLayout::sizeHints()
 
 }
 
+enum FunctionType {
+    SetGeometry = 0,
+    Invalidate,
+    NumFunctionTypes
+};
+
+
+
 class TestGraphicsWidget : public QGraphicsWidget {
 public:
     TestGraphicsWidget(QGraphicsWidget *parent = 0) : QGraphicsWidget(parent)
@@ -108,9 +117,28 @@ public:
     int eventCount(QEvent::Type type) {
         return m_eventCount.value(int(type));
     }
+
     void clearEventCount() {
         m_eventCount.clear();
     }
+
+    void clearCounters() {
+        m_eventCount.clear();
+        functionCount.clear();
+    }
+
+    void setGeometry(const QRectF &rect)
+    {
+        QGraphicsWidget::setGeometry(rect);
+        ++(functionCount[SetGeometry]);
+    }
+
+    void callUpdateGeometry()
+    {
+        // updateGeometry() is protected
+        QGraphicsWidget::updateGeometry();
+    }
+    QMap<FunctionType, int> functionCount;
 private:
     QMap<int, int> m_eventCount;
 };
@@ -122,6 +150,8 @@ void tst_QGraphicsLayout::compressLayoutRequest()
     TestGraphicsWidget *tw = new TestGraphicsWidget();
     scene.addItem(tw);
     view.show();
+
+    QTest::qWaitForWindowShown(&view);
     QGraphicsLinearLayout *lout = new QGraphicsLinearLayout(tw);
     for (int i = 0; i < 4; ++i) {
         QGraphicsWidget *gw = new QGraphicsWidget(tw);
@@ -217,17 +247,27 @@ class TestLayout : public QGraphicsLinearLayout
     TestLayout(QGraphicsLayoutItem *parent = 0)
         : QGraphicsLinearLayout(parent)
     {
-        m_count = 0;
+        setContentsMargins(0,0,0,0);
+        setSpacing(0);
     }
 
-    void setGeometry(const QRectF &rect) {
-
-        ++m_count;
+    void setGeometry(const QRectF &rect)
+    {
+        ++(functionCount[SetGeometry]);
         QGraphicsLinearLayout::setGeometry(rect);
     }
 
+    void invalidate()
+    {
+        ++(functionCount[Invalidate]);
+        QGraphicsLinearLayout::invalidate();
+    }
+
+    void clearCounters() {
+        functionCount.clear();
+    }
 
-    int m_count;
+    QMap<FunctionType, int> functionCount;
 };
 
 void tst_QGraphicsLayout::verifyActivate()
@@ -242,13 +282,278 @@ void tst_QGraphicsLayout::verifyActivate()
     lout->addItem(w);
     window->setLayout(lout);
 
-    QCOMPARE(lout->m_count, 0);
+    QCOMPARE(lout->functionCount[SetGeometry], 0);
     window->setVisible(false);
-    QCOMPARE(lout->m_count, 0);
+    QCOMPARE(lout->functionCount[SetGeometry], 0);
     window->setVisible(true);
     // on polish or the first time a widget is shown, the widget is resized.
-    QCOMPARE(lout->m_count, 1);
+    QCOMPARE(lout->functionCount[SetGeometry], 1);
+
+}
+
+static void clearAllCounters(TestGraphicsWidget *widget)
+{
+    if (!widget)
+        return;
+    widget->clearCounters();
+    TestLayout *layout = static_cast<TestLayout *>(widget->layout());
+    if (layout) {
+        layout->clearCounters();
+        for (int i = layout->count() - 1; i >=0; --i) {
+            QGraphicsLayoutItem *item = layout->itemAt(i);
+            if (item->isLayout()) {
+                // ### Not used ATM
+                //TestLayout *lay = static_cast<TestLayout*>(static_cast<QGraphicsLayout*>(item));
+                //clearAllCounters(lay);
+            } else {
+                TestGraphicsWidget *wid = static_cast<TestGraphicsWidget *>(item);
+                clearAllCounters(wid);
+            }
+        }
+    }
+}
+
+static void activateAndReset(TestGraphicsWidget *widget)
+{
+    QApplication::sendPostedEvents();
+    QApplication::processEvents();
+    if (widget->layout())
+        widget->layout()->activate();
+    clearAllCounters(widget);
+}
+
+
+void tst_QGraphicsLayout::invalidate()
+{
+    QGraphicsLayout::setInstantInvalidatePropagation(true);
+    QGraphicsScene scene;
+    QGraphicsView view(&scene);
+
+    TestGraphicsWidget *a = new TestGraphicsWidget;
+    a->setData(0, QString("a"));
+    scene.addItem(a);
+    TestLayout *alay = new TestLayout(a);
+    TestGraphicsWidget *b = new TestGraphicsWidget;
+    b->setData(0, QString("b"));
+    alay->addItem(b);
+    TestLayout *blay = new TestLayout(b);
+    TestGraphicsWidget *e = new TestGraphicsWidget;
+    e->setData(0, QString("e"));
+    blay->addItem(e);
+
+
+    TestGraphicsWidget *c = new TestGraphicsWidget;
+    c->setData(0, QString("c"));
+    alay->addItem(c);
+    TestLayout *clay = new TestLayout(c);
+    TestGraphicsWidget *f = new TestGraphicsWidget;
+    f->setData(0, QString("f"));
+    clay->addItem(f);
+
+    TestGraphicsWidget *d = new TestGraphicsWidget;
+    d->setData(0, QString("d"));
+    alay->addItem(d);
+    TestLayout *dlay = new TestLayout(d);
+    TestGraphicsWidget *g = new TestGraphicsWidget;
+    g->setData(0, QString("g"));
+    dlay->addItem(g);
+
+    view.show();
+
+    {
+        clearAllCounters(a);
+
+        QCoreApplication::sendPostedEvents();
+        QCoreApplication::processEvents();
+
+        alay->activate();
+        QCOMPARE(alay->isActivated(), true);
+        QCOMPARE(blay->isActivated(), true);
+        QCOMPARE(clay->isActivated(), true);
+        QCOMPARE(dlay->isActivated(), true);
+    }
+
+    {
+        clearAllCounters(a);
+        e->callUpdateGeometry();
+        QCOMPARE(alay->isActivated(), false);
+        QCOMPARE(blay->isActivated(), false);
+        QCOMPARE(clay->isActivated(), true);
+        QCOMPARE(dlay->isActivated(), true);
+        QCOMPARE(a->eventCount(QEvent::LayoutRequest), 0);
+        QCOMPARE(b->eventCount(QEvent::LayoutRequest), 0);
+        QCOMPARE(c->eventCount(QEvent::LayoutRequest), 0);
+        QCOMPARE(d->eventCount(QEvent::LayoutRequest), 0);
+
+        // should only invalidate ascendants of e
+        QCOMPARE(blay->functionCount[Invalidate], 1);
+        QCOMPARE(alay->functionCount[Invalidate], 1);
+        // not siblings
+        QCOMPARE(clay->functionCount[Invalidate], 0);
+        QCOMPARE(dlay->functionCount[Invalidate], 0);
+
+        QApplication::sendPostedEvents();
+        QCOMPARE(a->eventCount(QEvent::LayoutRequest), 1);
+        QCOMPARE(b->eventCount(QEvent::LayoutRequest), 1);
+        QCOMPARE(c->eventCount(QEvent::LayoutRequest), 0);
+        QCOMPARE(d->eventCount(QEvent::LayoutRequest), 0);
+    }
 
+
+    {
+        activateAndReset(a);
+        f->callUpdateGeometry();
+        QCOMPARE(alay->isActivated(), false);
+        QCOMPARE(blay->isActivated(), true);
+        QCOMPARE(clay->isActivated(), false);
+        QCOMPARE(dlay->isActivated(), true);
+
+        QCoreApplication::sendPostedEvents();
+        QCOMPARE(a->eventCount(QEvent::LayoutRequest), 1);
+        QCOMPARE(b->eventCount(QEvent::LayoutRequest), 0);
+        QCOMPARE(c->eventCount(QEvent::LayoutRequest), 1);
+        QCOMPARE(d->eventCount(QEvent::LayoutRequest), 0);
+
+        QCOMPARE(a->functionCount[SetGeometry], 1);
+        QCOMPARE(alay->functionCount[SetGeometry], 1);
+
+        QCOMPARE(b->functionCount[SetGeometry], 1);
+        QCOMPARE(c->functionCount[SetGeometry], 1);
+        QCOMPARE(d->functionCount[SetGeometry], 1);
+        // Since nothing really changed, blay and dlay don't need
+        // to be resized.
+        QCOMPARE(blay->functionCount[SetGeometry], 0);
+        QCOMPARE(clay->functionCount[SetGeometry], 1);
+        QCOMPARE(dlay->functionCount[SetGeometry], 0);
+
+        QCOMPARE(f->functionCount[SetGeometry], 1);
+
+        QCOMPARE(a->size(), QSizeF(150, 50));
+    }
+
+    {
+        activateAndReset(a);
+        f->setPreferredSize(QSizeF(60,50));
+        QCOMPARE(alay->isActivated(), false);
+        QCOMPARE(blay->isActivated(), true);
+        QCOMPARE(clay->isActivated(), false);
+        QCOMPARE(dlay->isActivated(), true);
+
+        QCOMPARE(c->eventCount(QEvent::LayoutRequest), 0);
+        QCoreApplication::sendPostedEvents();
+        QCOMPARE(a->eventCount(QEvent::LayoutRequest), 1);
+        QCOMPARE(b->eventCount(QEvent::LayoutRequest), 0);
+        QCOMPARE(c->eventCount(QEvent::LayoutRequest), 1);
+        QCOMPARE(d->eventCount(QEvent::LayoutRequest), 0);
+
+        QCOMPARE(a->functionCount[SetGeometry], 1);
+        QCOMPARE(alay->functionCount[SetGeometry], 1);
+
+        QCOMPARE(b->functionCount[SetGeometry], 1);
+        QCOMPARE(c->functionCount[SetGeometry], 1);
+        QCOMPARE(d->functionCount[SetGeometry], 1);
+        // f actually got wider, need to rearrange its siblings
+        QCOMPARE(blay->functionCount[SetGeometry], 1);
+        QCOMPARE(clay->functionCount[SetGeometry], 1);
+        QCOMPARE(dlay->functionCount[SetGeometry], 1);
+
+        QCOMPARE(e->functionCount[SetGeometry], 1);
+        QCOMPARE(f->functionCount[SetGeometry], 1);
+        QCOMPARE(g->functionCount[SetGeometry], 1);
+
+        QVERIFY(e->size().width() < f->size().width());
+        QVERIFY(g->size().width() < f->size().width());
+    }
+
+    {
+        // resize f so much that it'll force a resize of the top widget
+        // this will currently generate two setGeometry() calls on the child layout
+        // of the top widget.
+        activateAndReset(a);
+        f->setPreferredSize(QSizeF());
+        f->setMinimumSize(QSizeF(200,50));
+        QCOMPARE(alay->isActivated(), false);
+        QCOMPARE(blay->isActivated(), true);
+        QCOMPARE(clay->isActivated(), false);
+        QCOMPARE(dlay->isActivated(), true);
+
+        QCOMPARE(c->eventCount(QEvent::LayoutRequest), 0);
+        QCoreApplication::sendPostedEvents();
+        QCOMPARE(a->eventCount(QEvent::LayoutRequest), 1);
+        QCOMPARE(b->eventCount(QEvent::LayoutRequest), 0);
+        QCOMPARE(c->eventCount(QEvent::LayoutRequest), 1);
+        QCOMPARE(d->eventCount(QEvent::LayoutRequest), 0);
+
+        QCOMPARE(a->functionCount[SetGeometry], 1);
+
+        /* well, ideally one call to setGeometry(), but it will currently
+         * get two calls to setGeometry():
+         *   1. The first LayoutRequest will call activate() - that will call
+         *      setGeometry() on the layout. This geometry will be based on
+         *      the widget geometry which is not correct at this moment.
+         *      (it is still 150 wide)
+         *   2. Next, we check if the widget is top level, and then we call
+         *      parentWidget->resize(parentWidget->size());
+         *      This will be adjusted to be minimum 200 pixels wide.
+         *      The new size will then be propagated down to the layout
+         *
+         */
+        QCOMPARE(alay->functionCount[SetGeometry], 2);
+
+        QCOMPARE(b->functionCount[SetGeometry], 2);
+        QCOMPARE(c->functionCount[SetGeometry], 2);
+        QCOMPARE(d->functionCount[SetGeometry], 2);
+        // f actually got wider, need to rearrange its siblings
+        QCOMPARE(blay->functionCount[SetGeometry], 1);
+        QCOMPARE(clay->functionCount[SetGeometry], 1);
+        QCOMPARE(dlay->functionCount[SetGeometry], 1);
+
+        QCOMPARE(e->functionCount[SetGeometry], 1);
+        QCOMPARE(f->functionCount[SetGeometry], 1);
+        QCOMPARE(g->functionCount[SetGeometry], 1);
+
+        QVERIFY(e->size().width() < f->size().width());
+        QVERIFY(g->size().width() < f->size().width());
+    }
+
+    {
+        f->setPreferredSize(QSizeF());
+        f->setMinimumSize(QSizeF());
+        a->adjustSize();
+        activateAndReset(a);
+        // update two different leaf widgets,
+        // eventCount and functionCount should never be >= 2
+        e->callUpdateGeometry();
+        g->callUpdateGeometry();
+        QCOMPARE(alay->isActivated(), false);
+        QCOMPARE(blay->isActivated(), false);
+        QCOMPARE(clay->isActivated(), true);
+        QCOMPARE(dlay->isActivated(), false);
+
+        QCoreApplication::sendPostedEvents();
+        QCOMPARE(a->eventCount(QEvent::LayoutRequest), 1);
+        QCOMPARE(b->eventCount(QEvent::LayoutRequest), 1);
+        QCOMPARE(c->eventCount(QEvent::LayoutRequest), 0);
+        QCOMPARE(d->eventCount(QEvent::LayoutRequest), 1);
+
+        QCOMPARE(a->functionCount[SetGeometry], 1);
+        QCOMPARE(alay->functionCount[SetGeometry], 1);
+
+        QCOMPARE(b->functionCount[SetGeometry], 1);
+        QCOMPARE(c->functionCount[SetGeometry], 1);
+        QCOMPARE(d->functionCount[SetGeometry], 1);
+        // f actually got wider, need to rearrange its siblings
+        QCOMPARE(blay->functionCount[SetGeometry], 1);
+        QCOMPARE(clay->functionCount[SetGeometry], 0);
+        QCOMPARE(dlay->functionCount[SetGeometry], 1);
+
+        QCOMPARE(e->functionCount[SetGeometry], 1);
+        QCOMPARE(f->functionCount[SetGeometry], 0);
+        QCOMPARE(g->functionCount[SetGeometry], 1);
+
+    }
+
+    QGraphicsLayout::setInstantInvalidatePropagation(false);
 }
 
 class Layout : public QGraphicsLayout
diff --git a/tests/auto/qgraphicslinearlayout/tst_qgraphicslinearlayout.cpp b/tests/auto/qgraphicslinearlayout/tst_qgraphicslinearlayout.cpp
index 62ba1b4..8f8ac67 100644
--- a/tests/auto/qgraphicslinearlayout/tst_qgraphicslinearlayout.cpp
+++ b/tests/auto/qgraphicslinearlayout/tst_qgraphicslinearlayout.cpp
@@ -94,6 +94,7 @@ private slots:
     void itemSpacing();
     void setStretchFactor_data();
     void setStretchFactor();
+    void testStretch();
     void defaultStretchFactors_data();
     void defaultStretchFactors();
     void sizeHint_data();
@@ -667,6 +668,10 @@ void tst_QGraphicsLinearLayout::invalidate()
     layout.setContentsMargins(0, 0, 0, 0);
     view.show();
     widget->show();
+    //QTest::qWait(1000);
+    QTest::qWaitForWindowShown(&view);
+    qApp->processEvents();
+    layout.layoutRequest = 0;
 
     layout.setContentsMargins(1, 2, 3, 4);
     QApplication::sendPostedEvents(0, 0);
@@ -1130,6 +1135,41 @@ void tst_QGraphicsLinearLayout::setStretchFactor()
     delete widget;
 }
 
+void tst_QGraphicsLinearLayout::testStretch()
+{
+    QGraphicsScene scene;
+    QGraphicsView *view = new QGraphicsView(&scene);
+    QGraphicsWidget *form = new QGraphicsWidget(0, Qt::Window);
+
+    scene.addItem(form);
+    form->setMinimumSize(600, 600);
+    form->setMaximumSize(600, 600);
+    QGraphicsLinearLayout *layout = new QGraphicsLinearLayout(Qt::Horizontal, form);
+    QGraphicsWidget *w1 = new RectWidget;
+    w1->setPreferredSize(100,100);
+    w1->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    QGraphicsWidget *w2 = new RectWidget;
+    w2->setPreferredSize(200,200);
+    w2->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    layout->setSpacing(0);
+    layout->setContentsMargins(0, 0, 0, 0);
+    layout->addItem(w1);
+    layout->addStretch(2);
+    layout->addItem(w2);
+    QCOMPARE(layout->count(), 2);
+    QVERIFY(layout->itemAt(0) == w1);
+    QVERIFY(layout->itemAt(1) == w2);
+    layout->activate();
+
+    //view->setSceneRect(-50, -50, 800, 800);
+    //view->show();
+    //QTest::qWaitForWindowShown(view);
+    //QTest::qWait(5000);
+    QCOMPARE(form->geometry().size(), QSizeF(600,600));
+    QCOMPARE(w1->geometry(), QRectF(0, 0, 100, 100));
+    QCOMPARE(w2->geometry(), QRectF(400, 0, 200, 200));
+}
+
 void tst_QGraphicsLinearLayout::defaultStretchFactors_data()
 {
     QTest::addColumn<Qt::Orientation>("orientation");
diff --git a/tests/auto/qgraphicswidget/tst_qgraphicswidget.cpp b/tests/auto/qgraphicswidget/tst_qgraphicswidget.cpp
index e8e2e23..887026c 100644
--- a/tests/auto/qgraphicswidget/tst_qgraphicswidget.cpp
+++ b/tests/auto/qgraphicswidget/tst_qgraphicswidget.cpp
@@ -186,7 +186,6 @@ private slots:
     void task250119_shortcutContext();
     void QT_BUG_6544_tabFocusFirstUnsetWhenRemovingItems();
     void QT_BUG_12056_tabFocusFirstUnsetWhenRemovingItems();
-    void QT_BUG_13865_doublePaintWhenAddingASubItem();
 };
 
 
@@ -3367,46 +3366,6 @@ void tst_QGraphicsWidget::QT_BUG_12056_tabFocusFirstUnsetWhenRemovingItems()
     //This should not crash
 }
 
-
-struct GreenWidget : public QGraphicsWidget
-{
-    GreenWidget() : count(0)
-    {
-    }
-
-    void paint ( QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * )
-    {
-        count++;
-        painter->setPen(Qt::green);
-        painter->drawRect(option->rect.adjusted(0,0,-1,-1));
-    }
-
-    int count;
-};
-
-void tst_QGraphicsWidget::QT_BUG_13865_doublePaintWhenAddingASubItem()
-{
-    QGraphicsScene scene;
-    QGraphicsView view(&scene);
-    QGraphicsWidget *widget =  new QGraphicsWidget;
-    widget->resize(100, 100);
-    scene.addItem(widget);
-    QGraphicsLinearLayout *layout = new QGraphicsLinearLayout(widget);
-
-    view.show();
-    QTest::qWaitForWindowShown(&view);
-    QApplication::processEvents();
-
-
-    GreenWidget *sub =  new GreenWidget;
-    layout->addItem(sub);
-
-    QTest::qWait(100);
-    QCOMPARE(sub->count, 1); //it should only be painted once
-
-}
-
-
 QTEST_MAIN(tst_QGraphicsWidget)
 #include "tst_qgraphicswidget.moc"
 
diff --git a/tests/benchmarks/gui/graphicsview/graphicsview.pro b/tests/benchmarks/gui/graphicsview/graphicsview.pro
index e4fed19..1509466 100644
--- a/tests/benchmarks/gui/graphicsview/graphicsview.pro
+++ b/tests/benchmarks/gui/graphicsview/graphicsview.pro
@@ -3,6 +3,7 @@ SUBDIRS = \
         functional \
         qgraphicsanchorlayout \
         qgraphicsitem \
+        qgraphicslayout \
         qgraphicsscene \
         qgraphicsview \
         qgraphicswidget
diff --git a/tests/benchmarks/gui/graphicsview/qgraphicslayout/qgraphicslayout.pro b/tests/benchmarks/gui/graphicsview/qgraphicslayout/qgraphicslayout.pro
new file mode 100644
index 0000000..19e2979
--- /dev/null
+++ b/tests/benchmarks/gui/graphicsview/qgraphicslayout/qgraphicslayout.pro
@@ -0,0 +1,6 @@
+load(qttest_p4)
+TEMPLATE = app
+TARGET = tst_bench_qgraphicslayout
+
+SOURCES += tst_qgraphicslayout.cpp
+
diff --git a/tests/benchmarks/gui/graphicsview/qgraphicslayout/tst_qgraphicslayout.cpp b/tests/benchmarks/gui/graphicsview/qgraphicslayout/tst_qgraphicslayout.cpp
new file mode 100644
index 0000000..4bdcfb3
--- /dev/null
+++ b/tests/benchmarks/gui/graphicsview/qgraphicslayout/tst_qgraphicslayout.cpp
@@ -0,0 +1,153 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtTest/QtTest>
+#include <QtGui/qgraphicslayout.h>
+#include <QtGui/qgraphicslinearlayout.h>
+#include <QtGui/qgraphicswidget.h>
+#include <QtGui/qgraphicsview.h>
+
+class tst_QGraphicsLayout : public QObject
+{
+    Q_OBJECT
+public:
+    tst_QGraphicsLayout() {}
+    ~tst_QGraphicsLayout() {}
+
+private slots:
+    void invalidate();
+};
+
+
+class RectWidget : public QGraphicsWidget
+{
+public:
+    RectWidget(QGraphicsItem *parent = 0, Qt::WindowFlags wFlags = 0) : QGraphicsWidget(parent, wFlags), setGeometryCalls(0) {}
+
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+    {
+        Q_UNUSED(option);
+        Q_UNUSED(widget);
+        painter->drawRoundRect(rect());
+        painter->drawLine(rect().topLeft(), rect().bottomRight());
+        painter->drawLine(rect().bottomLeft(), rect().topRight());
+    }
+
+    void setGeometry(const QRectF &rect)
+    {
+        //qDebug() << "setGeometry():" << this->data(0).toString();
+        setGeometryCalls->insert(this, rect);
+        QGraphicsWidget::setGeometry(rect);
+    }
+
+    void callUpdateGeometry() {
+        QGraphicsWidget::updateGeometry();
+    }
+
+    QMap<RectWidget*, QRectF> *setGeometryCalls;
+};
+
+/**
+ * Test to see how much time is needed to resize all widgets in a
+ * layout-widget-layout-widget-.... hierarchy from the point where a
+ * leaf widget changes its size hint. (updateGeometry() is called).
+ *
+ * If you run the test for 4.7 you'll get some really high numbers, but
+ * that's because they also include painting (and possible processing of
+ * some other events).
+ */
+void tst_QGraphicsLayout::invalidate()
+{
+    QGraphicsLayout::setInstantInvalidatePropagation(true);
+    QGraphicsScene scene;
+    QGraphicsView *view = new QGraphicsView(&scene);
+    QMap<RectWidget*, QRectF> setGeometryCalls;
+
+    RectWidget *window = new RectWidget(0, Qt::Window);
+    window->setGeometryCalls = &setGeometryCalls;
+    window->setData(0, QString(QChar('a')));
+
+    scene.addItem(window);
+    RectWidget *leaf = 0;
+    const int depth = 100;
+    RectWidget *parent = window;
+    for (int i = 1; i < depth; ++i) {
+        QGraphicsLinearLayout *l = new QGraphicsLinearLayout(parent);
+        l->setContentsMargins(0,0,0,0);
+        RectWidget *child = new RectWidget;
+        child->setData(0, QString(QChar('a' + i)));
+        child->setGeometryCalls = &setGeometryCalls;
+        l->addItem(child);
+        parent = child;
+    }
+    leaf = parent;
+    leaf->setMinimumSize(QSizeF(1,1));
+
+    view->show();
+
+    QTest::qWaitForWindowShown(view);
+
+    // ...then measure...
+
+    int pass = 1;
+
+    // should be as small as possible, to reduce overhead of painting
+    QSizeF size(1, 1);
+    setGeometryCalls.clear();
+    QBENCHMARK {
+        leaf->setMinimumSize(size);
+        leaf->setMaximumSize(size);
+        while (setGeometryCalls.count() < depth) {
+            QApplication::sendPostedEvents();
+        }
+        // force a resize on each widget, this will ensure
+        // that each iteration will resize all 50 widgets
+        int w = int(size.width());
+        w^=2;
+        size.setWidth(w);
+    }
+    delete view;
+    QGraphicsLayout::setInstantInvalidatePropagation(false);
+}
+
+QTEST_MAIN(tst_QGraphicsLayout)
+
+#include "tst_qgraphicslayout.moc"
diff --git a/tests/manual/qgraphicslayout/flicker/flicker.pro b/tests/manual/qgraphicslayout/flicker/flicker.pro
new file mode 100644
index 0000000..323a30f
--- /dev/null
+++ b/tests/manual/qgraphicslayout/flicker/flicker.pro
@@ -0,0 +1,8 @@
+TEMPLATE = app
+TARGET =
+DEPENDPATH += .
+INCLUDEPATH += .
+
+# Input
+HEADERS += window.h
+SOURCES += main.cpp window.cpp
diff --git a/tests/manual/qgraphicslayout/flicker/main.cpp b/tests/manual/qgraphicslayout/flicker/main.cpp
new file mode 100644
index 0000000..7e75c2b
--- /dev/null
+++ b/tests/manual/qgraphicslayout/flicker/main.cpp
@@ -0,0 +1,56 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <windows.h>
+#include "window.h"
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+    Window *window = new Window();
+    window->resize(800, 600);
+
+    window->show();
+
+    return app.exec();
+
+}
diff --git a/tests/manual/qgraphicslayout/flicker/window.cpp b/tests/manual/qgraphicslayout/flicker/window.cpp
new file mode 100644
index 0000000..ee4db3f
--- /dev/null
+++ b/tests/manual/qgraphicslayout/flicker/window.cpp
@@ -0,0 +1,73 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "window.h"
+
+void SlowWidget::setGeometry(const QRectF &rect)
+{
+    bool reiterate = false;
+    Statistics &stats = *m_stats;
+    if (stats.relayoutClicked) {
+        ++(stats.setGeometryTracker[this]);
+        ++stats.setGeometryCount;
+        qDebug() << "setGeometryCount:" << stats.setGeometryCount;
+        if (stats.setGeometryTracker.count() == m_window->m_depthSpinBox->value()) {
+            ++stats.currentBenchmarkIteration;
+            qDebug() << "currentBenchmarkIteration:" << stats.currentBenchmarkIteration;
+            if (stats.currentBenchmarkIteration == m_window->m_benchmarkIterationsSpinBox->value()) {
+                if (stats.output)
+                    stats.output->setText(tr("DONE. Elapsed: %1, setGeometryCount: %2").arg(stats.time.elapsed()).arg(stats.setGeometryCount));
+            } else {
+                reiterate = true;
+            }
+            stats.setGeometryTracker.clear();
+
+        }
+    }
+
+    QGraphicsWidget::setGeometry(rect);
+
+    if (reiterate) {
+        m_window->doAgain();
+        //QTimer::singleShot(0, m_window, SLOT(doAgain()));
+    }
+}
+
diff --git a/tests/manual/qgraphicslayout/flicker/window.h b/tests/manual/qgraphicslayout/flicker/window.h
new file mode 100644
index 0000000..b4c42c0
--- /dev/null
+++ b/tests/manual/qgraphicslayout/flicker/window.h
@@ -0,0 +1,284 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef WINDOW_H
+#define WINDOW_H
+
+
+#include <QtGui>
+
+static void qSleep(int msec)
+{
+
+    struct Thread : public QThread
+    {
+        static void wait(int msec)
+        {
+            QThread::msleep(msec);
+        }
+    };
+    Thread::wait(msec);
+}
+
+struct Statistics {
+    Statistics() : output(0),
+        setGeometryCount(0), currentBenchmarkIteration(0), relayoutClicked(false), sleepMsecs(0)
+    {
+    }
+    QMap<QGraphicsWidget*, int> setGeometryTracker;
+    QTime time;
+    int setGeometryCount;
+    int sleepMsecs;
+    QLabel *output;
+    void sleep()
+    {
+        qSleep(sleepMsecs);
+    }
+    int currentBenchmarkIteration;
+    bool relayoutClicked;
+
+};
+
+
+class Window;
+
+class SlowWidget : public QGraphicsWidget {
+public:
+    SlowWidget(QGraphicsWidget *w = 0, Qt::WindowFlags wFlags = 0) : QGraphicsWidget(w, wFlags)
+    {
+        m_window = 0;
+    }
+
+    void setStats(Statistics *stats)
+    {
+        m_stats = stats;
+    }
+
+    void setWindow(Window *window)
+    {
+        m_window = window;
+    }
+
+    void setGeometry(const QRectF &rect);
+
+    bool event(QEvent *e)
+    {
+        if (e->type() == QEvent::LayoutRequest) {
+            if (m_stats->sleepMsecs > 0) {
+                m_stats->sleep();
+                qDebug("sleep %d ms\n", m_stats->sleepMsecs);
+            }
+        }
+        return QGraphicsWidget::event(e);
+    }
+
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+    {
+        Q_UNUSED(option);
+        Q_UNUSED(widget);
+        painter->setBrush(m_brush);
+        painter->drawRoundRect(rect());
+        painter->drawLine(rect().topLeft(), rect().bottomRight());
+        painter->drawLine(rect().bottomLeft(), rect().topRight());
+    }
+
+    void setBrush(const QBrush &brush)
+    {
+        m_brush = brush;
+    }
+private:
+    QBrush m_brush;
+    Statistics *m_stats;
+    Window *m_window;
+};
+
+class Window : public QWidget {
+    Q_OBJECT
+public:
+    Window() : QWidget()
+    {
+        QGraphicsView *m_view = new QGraphicsView(&scene);
+
+        m_window = 0;
+        m_leaf = 0;
+
+        m_button = new QPushButton(tr("Relayout"));
+        m_button->setObjectName("button");
+
+        m_sleepLabel = new QLabel(tr("Sleep:"));
+        m_sleepSpinBox = new QSpinBox;
+        m_sleepSpinBox->setRange(0, 1000);
+        m_sleepSpinBox->setSingleStep(10);
+
+        m_depthLabel = new QLabel(tr("Depth:"));
+        m_depthSpinBox = new QSpinBox;
+        m_depthSpinBox->setObjectName("depthSpinBox");
+        m_depthSpinBox->setRange(1, 200);
+        m_depthSpinBox->setSingleStep(5);
+
+        m_benchmarkIterationsLabel = new QLabel(tr("Benchmark iterations"));
+        m_benchmarkIterationsSpinBox = new QSpinBox;
+        m_benchmarkIterationsSpinBox->setObjectName("benchmarkIterationsSpinBox");
+        m_benchmarkIterationsSpinBox->setRange(1, 1000);
+        m_benchmarkIterationsSpinBox->setValue(41);
+        m_benchmarkIterationsSpinBox->setSingleStep(10);
+
+        m_instantCheckBox = new QCheckBox(tr("Instant propagation"));
+        m_instantCheckBox->setObjectName("instantPropagationCheckbox");
+        QGraphicsLayout::setInstantInvalidatePropagation(true);
+        m_instantCheckBox->setChecked(QGraphicsLayout::instantInvalidatePropagation());
+
+        m_resultLabel = new QLabel(tr("Press relayout to start test"));
+
+        QHBoxLayout *hbox = new QHBoxLayout;
+        hbox->addWidget(m_sleepLabel);
+        hbox->addWidget(m_sleepSpinBox);
+        hbox->addWidget(m_depthLabel);
+        hbox->addWidget(m_depthSpinBox);
+        hbox->addWidget(m_benchmarkIterationsLabel);
+        hbox->addWidget(m_benchmarkIterationsSpinBox);
+        hbox->addWidget(m_instantCheckBox);
+        hbox->addWidget(m_resultLabel);
+        hbox->addStretch();
+        hbox->addWidget(m_button);
+
+        QVBoxLayout *vbox = new QVBoxLayout;
+        vbox->addWidget(m_view);
+        vbox->addLayout(hbox);
+        setLayout(vbox);
+
+        metaObject()->connectSlotsByName(this);
+
+        m_depthSpinBox->setValue(20);   // triggers purposedly on_depthSpinBox_valueChanged
+    }
+
+private slots:
+    void on_depthSpinBox_valueChanged(int value)
+    {
+        m_stats.relayoutClicked = false;
+        if (m_window) {
+            QApplication::processEvents();
+            delete m_window;
+        }
+        m_window = new SlowWidget(0, Qt::Window);
+        m_window->setStats(&m_stats);
+        m_window->setWindow(this);
+        QColor col(Qt::black);
+        m_window->setBrush(col);
+        scene.addItem(m_window);
+        m_leaf = 0;
+        const int depth = value;
+        SlowWidget *parent = m_window;
+        for (int i = 1; i < depth; ++i) {
+            QGraphicsLinearLayout *l = new QGraphicsLinearLayout(parent);
+            l->setContentsMargins(2,2,2,2);
+            SlowWidget *child = new SlowWidget;
+            QColor col;
+            col.setHsl(0, 0, 255*i/(depth - 1));
+            child->setBrush(col);
+            child->setStats(&m_stats);
+            child->setWindow(this);
+            l->addItem(child);
+            parent = child;
+        }
+        m_leaf = parent;
+    }
+
+    void on_button_clicked(bool /*check = false*/)
+    {
+        m_stats.relayoutClicked = true;
+        if (m_leaf) {
+            QSizeF sz = m_leaf->size();
+            int w = int(sz.width());
+            w^=16;
+            sz = QSizeF(w,w);
+            m_stats.output = m_resultLabel;
+            m_stats.output->setText(QString("wait..."));
+            m_stats.setGeometryCount = 0;
+            m_stats.setGeometryTracker.clear();
+            m_stats.sleepMsecs = m_sleepSpinBox->value();
+            m_stats.time.start();
+            m_stats.currentBenchmarkIteration = 0;
+            m_leaf->setMinimumSize(sz);
+            m_leaf->setMaximumSize(sz);
+        }
+    }
+
+    void on_instantPropagationCheckbox_toggled(bool checked)
+    {
+        QGraphicsLayout::setInstantInvalidatePropagation(checked);
+    }
+
+public slots:
+    void doAgain()
+    {
+        if (m_leaf) {
+            QSizeF sz = m_leaf->size();
+            int w = int(sz.width());
+            w^=16;
+            sz = QSizeF(w,w);
+            m_leaf->setMinimumSize(sz);
+            m_leaf->setMaximumSize(sz);
+        }
+    }
+
+private:
+public:
+    QGraphicsScene scene;
+    QGraphicsView *m_view;
+    QPushButton *m_button;
+    QLabel *m_sleepLabel;
+    QSpinBox *m_sleepSpinBox;
+    QLabel *m_depthLabel;
+    QSpinBox *m_depthSpinBox;
+    QLabel *m_benchmarkIterationsLabel;
+    QSpinBox *m_benchmarkIterationsSpinBox;
+    QCheckBox *m_instantCheckBox;
+    QLabel *m_resultLabel;
+    QGraphicsWidget *m_leaf;
+    SlowWidget *m_window;
+    Statistics m_stats;
+
+
+};
+
+
+#endif //WINDOW_H