Merge branch '4.6' of scm.dev.nokia.troll.no:qt/oslo-staging-2 into 4.6-integration

* '4.6' of scm.dev.nokia.troll.no:qt/oslo-staging-2:
  Fix QFileSystemModel to not install useless watchers on the filesystem

1 files changed, 10 insertions, 0 deletions

diff --git a/src/gui/dialogs/qfilesystemmodel.cpp b/src/gui/dialogs/qfilesystemmodel.cpp
index 6fd947ce3b..3757ad7295 100644
--- a/src/gui/dialogs/qfilesystemmodel.cpp
+++ b/src/gui/dialogs/qfilesystemmodel.cpp
@@ -1361,6 +1361,16 @@ QModelIndex QFileSystemModel::setRootPath(const QString &newPath)
     if (!showDrives && !newPathDir.exists())
         return d->index(rootPath());
 
+    //We remove the watcher on the previous path
+    if (!rootPath().isEmpty()) {
+        //This remove the watcher for the old rootPath
+        d->fileInfoGatherer.removePath(rootPath());
+        //This line "marks" the node as dirty, so the next fetchMore
+        //call on the path will ask the gatherer to install a watcher again
+        //But it doesn't re-fetch everything
+        d->node(rootPath())->populatedChildren = false;
+    }
+
     // We have a new valid root path
     d->rootDir = newPathDir;
     QModelIndex newRootIndex;