5 files changed, 29 insertions, 22 deletions

diff --git a/src/gui/graphicsview/qgraphicslayout.cpp b/src/gui/graphicsview/qgraphicslayout.cpp
index b37dfd4..f983955 100644
--- a/src/gui/graphicsview/qgraphicslayout.cpp
+++ b/src/gui/graphicsview/qgraphicslayout.cpp
@@ -269,18 +269,8 @@ void QGraphicsLayout::activate()
         return;
     Q_ASSERT(!parentItem->isLayout());
 
-    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
+    setGeometry(parentItem->contentsRect());    // relayout children
+    if (!QGraphicsLayout::instantInvalidatePropagation()) {
         parentLayoutItem()->updateGeometry();
     }
 }
diff --git a/src/gui/graphicsview/qgraphicswidget.cpp b/src/gui/graphicsview/qgraphicswidget.cpp
index 7048fcc..965b1b34 100644
--- a/src/gui/graphicsview/qgraphicswidget.cpp
+++ b/src/gui/graphicsview/qgraphicswidget.cpp
@@ -404,14 +404,7 @@ void QGraphicsWidget::setGeometry(const QRectF &rect)
                 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);
-            }
+            QApplication::sendEvent(this, &re);
         }
     }
 
@@ -1090,8 +1083,11 @@ void QGraphicsWidget::updateGeometry()
              * 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()) {
+                Q_D(QGraphicsWidget);
+                ++d->refCountInvokeRelayout;
+                QMetaObject::invokeMethod(this, "_q_relayout", Qt::QueuedConnection);
+            }
         }
         if (!QGraphicsLayout::instantInvalidatePropagation()) {
             bool wasResized = testAttribute(Qt::WA_Resized);
diff --git a/src/gui/graphicsview/qgraphicswidget.h b/src/gui/graphicsview/qgraphicswidget.h
index 063be2d..5085817 100644
--- a/src/gui/graphicsview/qgraphicswidget.h
+++ b/src/gui/graphicsview/qgraphicswidget.h
@@ -234,6 +234,8 @@ protected:
 private:
     Q_DISABLE_COPY(QGraphicsWidget)
     Q_DECLARE_PRIVATE_D(QGraphicsItem::d_ptr.data(), QGraphicsWidget)
+    Q_PRIVATE_SLOT(d_func(), void _q_relayout())
+
     friend class QGraphicsScene;
     friend class QGraphicsScenePrivate;
     friend class QGraphicsView;
diff --git a/src/gui/graphicsview/qgraphicswidget_p.cpp b/src/gui/graphicsview/qgraphicswidget_p.cpp
index 059051e..dc0f7c0 100644
--- a/src/gui/graphicsview/qgraphicswidget_p.cpp
+++ b/src/gui/graphicsview/qgraphicswidget_p.cpp
@@ -232,6 +232,18 @@ void QGraphicsWidgetPrivate::resolveLayoutDirection()
     }
 }
 
+/* private slot */
+void QGraphicsWidgetPrivate::_q_relayout()
+{
+    --refCountInvokeRelayout;
+    if (refCountInvokeRelayout == 0) {
+        Q_Q(QGraphicsWidget);
+        bool wasResized = q->testAttribute(Qt::WA_Resized);
+        q->resize(q->size()); // this will restrict the size
+        q->setAttribute(Qt::WA_Resized, wasResized);
+    }
+}
+
 QPalette QGraphicsWidgetPrivate::naturalWidgetPalette() const
 {
     Q_Q(const QGraphicsWidget);
@@ -897,4 +909,6 @@ void QGraphicsWidgetPrivate::setGeometryFromSetPos()
 
 QT_END_NAMESPACE
 
+#include "moc_qgraphicswidget.cpp"
+
 #endif //QT_NO_GRAPHICSVIEW
diff --git a/src/gui/graphicsview/qgraphicswidget_p.h b/src/gui/graphicsview/qgraphicswidget_p.h
index 398abc3..6ea2586 100644
--- a/src/gui/graphicsview/qgraphicswidget_p.h
+++ b/src/gui/graphicsview/qgraphicswidget_p.h
@@ -81,6 +81,7 @@ public:
           polished(0),
           inSetPos(0),
           autoFillBackground(0),
+          refCountInvokeRelayout(0),
           focusPolicy(Qt::NoFocus),
           focusNext(0),
           focusPrev(0),
@@ -106,6 +107,7 @@ public:
     QGraphicsLayout *layout;
     void setLayoutDirection_helper(Qt::LayoutDirection direction);
     void resolveLayoutDirection();
+    void _q_relayout();
 
     // Style
     QPalette palette;
@@ -179,11 +181,14 @@ public:
             return false;
         return (attributes & (1 << bit)) != 0;
     }
+    // 32 bits
+    quint32 refCountInvokeRelayout : 16;
     quint32 attributes : 10;
     quint32 inSetGeometry : 1;
     quint32 polished: 1;
     quint32 inSetPos : 1;
     quint32 autoFillBackground : 1;
+    quint32 padding : 2;    // feel free to use
 
     // Focus
     Qt::FocusPolicy focusPolicy;