Fix the problem that can be reproduced by:

- Scroll the applets view
- Search whatever
That will make the view completely unusable by hiding all titles and comments about applets.

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=844943

appletbrowser/kcategorizeditemsview.cpp

@@ -111,6 +111,7 @@ void KCategorizedItemsView::setItemModel(QStandardItemModel * model)
 {
     if (!m_modelFilterItems) {
         m_modelFilterItems = new DefaultItemFilterProxyModel(this);
+        connect(m_modelFilterItems, SIGNAL(searchTermChanged(QString)), this, SLOT(slotSearchTermChanged(QString)));
     }
 
     m_modelItems = model;
@@ -166,6 +167,11 @@ void KCategorizedItemsView::itemDoubleClicked(const QModelIndex& index)
     emit doubleClicked(index);
 }
 
+void KCategorizedItemsView::slotSearchTermChanged( const QString& term )
+{
+    updateColumnsWidth();
+}
+
 void KCategorizedItemsView::updateColumnsWidth(bool force)
 {
     m_viewWidth = itemsView->viewport()->width();

appletbrowser/kcategorizeditemsview_p.h

@@ -71,6 +71,7 @@ protected slots:
 private slots:
     void itemActivated( const QModelIndex& index );
     void itemDoubleClicked( const QModelIndex& index );
+    void slotSearchTermChanged( const QString& term );
 
 Q_SIGNALS:
     void activated ( const QModelIndex & index );

appletbrowser/kcategorizeditemsviewmodels.cpp

@@ -138,6 +138,7 @@ void DefaultItemFilterProxyModel::setSearch(const QString & pattern)
 {
     m_searchPattern = pattern;
     invalidateFilter();
+    emit searchTermChanged(pattern);
 }
 
 void DefaultItemFilterProxyModel::setFilter(const Filter & filter)

appletbrowser/kcategorizeditemsviewmodels_p.h

@@ -106,6 +106,8 @@ public:
  */
 class DefaultItemFilterProxyModel : public QSortFilterProxyModel
 {
+Q_OBJECT
+
 public:
     DefaultItemFilterProxyModel(QObject * parent = 0);
 
@@ -123,6 +125,9 @@ public:
 
     QVariant data(const QModelIndex & index, int role = Qt::DisplayRole) const;
 
+Q_SIGNALS:
+    void searchTermChanged(const QString &term);
+
 private:
 
     class InnerProxyModel : public QAbstractItemModel