Set ChildenDoNotOverlap flag on grids, lists and positioners.

QSGGridView, QSGListView, QSGRow, QSGColumn, QSGGrid and
QSGFlow now all set the ChildrenDoNotOverlap flag which allows
the scene graph to render nodes in a more optimal order.

7 files changed, 9 insertions, 4 deletions

diff --git a/src/declarative/items/qsggridview.cpp b/src/declarative/items/qsggridview.cpp
index 9beac05d72..4f00d3651f 100644
--- a/src/declarative/items/qsggridview.cpp
+++ b/src/declarative/items/qsggridview.cpp
@@ -488,6 +488,7 @@ public:
 void QSGGridViewPrivate::init()
 {
     Q_Q(QSGGridView);
+    QSGItemPrivate::get(contentItem)->childrenDoNotOverlap = true;
     QObject::connect(q, SIGNAL(movementEnded()), q, SLOT(animStopped()));
     q->setFlag(QSGItem::ItemIsFocusScope);
     q->setFlickableDirection(QSGFlickable::VerticalFlick);
diff --git a/src/declarative/items/qsgitem.cpp b/src/declarative/items/qsgitem.cpp
index b0df6b1a04..f2d26955aa 100644
--- a/src/declarative/items/qsgitem.cpp
+++ b/src/declarative/items/qsgitem.cpp
@@ -1268,7 +1268,7 @@ QSGItemPrivate::QSGItemPrivate()
   notifiedActiveFocus(false), filtersChildMouseEvents(false), explicitVisible(true), 
   effectiveVisible(true), explicitEnable(true), effectiveEnable(true), polishScheduled(false),
   inheritedLayoutMirror(false), effectiveLayoutMirror(false), isMirrorImplicit(true),
-  inheritMirrorFromParent(false), inheritMirrorFromItem(false),
+  inheritMirrorFromParent(false), inheritMirrorFromItem(false), childrenDoNotOverlap(false),
 
   canvas(0), parentItem(0),
 
diff --git a/src/declarative/items/qsgitem_p.h b/src/declarative/items/qsgitem_p.h
index a13fd6a85a..c76eceb674 100644
--- a/src/declarative/items/qsgitem_p.h
+++ b/src/declarative/items/qsgitem_p.h
@@ -254,7 +254,8 @@ public:
     bool isMirrorImplicit:1;
     bool inheritMirrorFromParent:1;
     bool inheritMirrorFromItem:1;
-    quint32 dummy:2;
+    bool childrenDoNotOverlap:1;
+    quint32 dummy:1;
 
     QSGCanvas *canvas;
     QSGContext *sceneGraphContext() const { return static_cast<QSGCanvasPrivate *>(QObjectPrivate::get(canvas))->context; }
@@ -689,6 +690,7 @@ QSGNode *QSGItemPrivate::childContainerNode()
             opacityNode->appendChildNode(groupNode);
         else
             itemNode()->appendChildNode(groupNode);
+        groupNode->setFlag(QSGNode::ChildrenDoNotOverlap, childrenDoNotOverlap);
 #ifdef QML_RUNTIME_TESTING
         groupNode->description = QLatin1String("group");
 #endif
diff --git a/src/declarative/items/qsglistview.cpp b/src/declarative/items/qsglistview.cpp
index 496fdaf4cc..80cc8be837 100644
--- a/src/declarative/items/qsglistview.cpp
+++ b/src/declarative/items/qsglistview.cpp
@@ -611,6 +611,7 @@ public:
 void QSGListViewPrivate::init()
 {
     Q_Q(QSGListView);
+    QSGItemPrivate::get(contentItem)->childrenDoNotOverlap = true;
     q->setFlag(QSGItem::ItemIsFocusScope);
     addItemChangeListener(this, Geometry);
     QObject::connect(q, SIGNAL(movementEnded()), q, SLOT(animStopped()));
diff --git a/src/declarative/items/qsgpositioners_p_p.h b/src/declarative/items/qsgpositioners_p_p.h
index 241cbcfa3c..49de12a1fd 100644
--- a/src/declarative/items/qsgpositioners_p_p.h
+++ b/src/declarative/items/qsgpositioners_p_p.h
@@ -82,6 +82,7 @@ public:
     void init(QSGBasePositioner::PositionerType at)
     {
         type = at;
+        childrenDoNotOverlap = true;
     }
 
     int spacing;
diff --git a/src/declarative/scenegraph/coreapi/qsgdefaultrenderer.cpp b/src/declarative/scenegraph/coreapi/qsgdefaultrenderer.cpp
index 05e502535a..901b84aa09 100644
--- a/src/declarative/scenegraph/coreapi/qsgdefaultrenderer.cpp
+++ b/src/declarative/scenegraph/coreapi/qsgdefaultrenderer.cpp
@@ -324,7 +324,7 @@ void QMLRenderer::buildLists(QSGNode *node)
     static bool reorder = !qApp->arguments().contains(QLatin1String("--no-reorder"));
 #endif
 
-    if (reorder && count > 1 && (node->flags() & QSGNode::ChildrenDoNotOverloap)) {
+    if (reorder && count > 1 && (node->flags() & QSGNode::ChildrenDoNotOverlap)) {
         QVarLengthArray<int, 16> beginIndices(count);
         QVarLengthArray<int, 16> endIndices(count);
         int baseCount = m_transparentNodes.size();
diff --git a/src/declarative/scenegraph/coreapi/qsgnode.h b/src/declarative/scenegraph/coreapi/qsgnode.h
index fd2bc82b22..d6700af32e 100644
--- a/src/declarative/scenegraph/coreapi/qsgnode.h
+++ b/src/declarative/scenegraph/coreapi/qsgnode.h
@@ -99,7 +99,7 @@ public:
         // Lower 16 bites reserved for general node
         OwnedByParent               = 0x0001,
         UsePreprocess               = 0x0002,
-        ChildrenDoNotOverloap       = 0x0004,
+        ChildrenDoNotOverlap        = 0x0004,
 
         // Upper 16 bits reserved for node subclasses