Minor layout optimization

Abort layout traversal when finding the first dirty parent, since
the event was already being posted for the top level layout.

Signed-off-by: Adriano Rezende <adriano.rezende@openbossa.org>

Merge-request: 12
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@nokia.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/qdeclarativelayout.cpp b/src/qdeclarativelayout.cpp
index 64af622e..1d250a0d 100644
--- a/src/qdeclarativelayout.cpp
+++ b/src/qdeclarativelayout.cpp
@@ -158,7 +158,7 @@ void QDeclarativeLayout::invalidate()
     QDeclarativeLayout *layout = this;
     QDeclarativeLayout *parentLayout = 0;
 
-    while (layout) {
+    while (!layout->m_dirty) {
         layout->m_dirty = true;
         parentLayout = qobject_cast<QDeclarativeLayout *>(layout->parentItem());
 
@@ -168,7 +168,9 @@ void QDeclarativeLayout::invalidate()
             layout = parentLayout;
     }
 
-    QApplication::postEvent(layout, new QEvent(QEvent::LayoutRequest));
+    // just post events for top level layouts
+    if (!parentLayout)
+        QApplication::postEvent(layout, new QEvent(QEvent::LayoutRequest));
 }
 
 void QDeclarativeLayout::reconfigureTopDown()