Foremost a fix for SmTreeModel

Not working again, but I eventually have to commit the changes. Fixes to
SmTreeModel:

* Fix SmTreeModel::index(). The previous comment was quite valid. I'm
surprised that it worked at all. I have no clue why to return an invalid
QModelIndex if the column isn't 0. Now an index with any valid column
number can be created.

* Fix SmTreeModel::parent(). Again, why shouldn't we create a parent
index with a column other than 0? No idea...

* Fix SmTreeModel::headerData(). Add some sanity checks.

* Fix SmTreeModel::findRecursive(). Well, what is there to say. It never
worked for models with a depth > 1, but obviously it didn't really
matter until now. To make it work I had to change SmTreeItem as well.
SmTreeItem::next() returns the next valid parent/sibling, or 0 if there
isn't one.

There may be some fallout from these changes, but they're yet to be
seen.

Changes to PictureView:
* fix selecting an item according to the new datasbase layout
* same goes for editing items. If an update actually works has to be
checked.

Overall, it's an intermediate commit that should have been a sane series
of commits. Can't be changed now...

1 files changed, 12 insertions, 7 deletions

diff --git a/seriestreewidget.cpp b/seriestreewidget.cpp
index 1f96a11..2a487fb 100644
--- a/seriestreewidget.cpp
+++ b/seriestreewidget.cpp
@@ -68,12 +68,12 @@ SeriesTreeWidget::SeriesTreeWidget(QWidget *parent) : QWidget(parent){
 	mView = new SeriesTreeView;
 	mProxy = new SeriesTreeSortModel(this);
 	mModel = static_cast<SeriesTreeModel*>(SmGlobals::instance()->model("SeriesModel"));
-	mProxy->setSourceModel(mModel);
-	mView->setModel(mProxy);
-	mView->setSortingEnabled(true);
-	for(int i = 1; i < SeriesTreeModel::NumFields; ++i){
+    mProxy->setSourceModel(mModel);
+    mView->setModel(mProxy);
+    mView->setSortingEnabled(true);
+    for(int i = 1; i < SeriesTreeModel::NumFields; ++i){
 		mView->setColumnHidden(i, true);
-	}
+    }
 	mView->resizeColumnToContents(0);
 	mView->setSelectionMode(QAbstractItemView::ExtendedSelection);
 	mView->setEditTriggers(QAbstractItemView::NoEditTriggers);
@@ -495,9 +495,14 @@ bool SeriesTreeSortModel::lessThan(const QModelIndex &left, const QModelIndex &r
 }
 
 bool SeriesTreeSortModel::filterAcceptsRow(int source_row, const QModelIndex &source_parent) const {
-	SeriesTreeModel *seriesModel = static_cast<SeriesTreeModel*>(sourceModel());
+    SeriesTreeModel *seriesModel = static_cast<SeriesTreeModel*>(sourceModel());
 	int rowFilter = seriesModel->rowFilter();
-	QModelIndex curIdx = sourceModel()->index(source_row, 0, source_parent);
+    /*QModelIndex parent = source_parent;
+    if(!parent.isValid()){
+        parent = seriesModel->rootIndex();
+    }*/
+    QModelIndex curIdx = sourceModel()->index(source_row, 0, source_parent);
+    //QModelIndex curIdx = source_parent;
 	QString name = curIdx.data(SeriesTreeModel::NameRole).toString();
 	QRegExp filterRe = filterRegExp();
 	if(rowFilter == SeriesTreeModel::All){