Implement grouping for names

- Use a custom header for KFileItems
- Cache the groups
- Allow enabling/disabling grouping dynamically

Currently there is a random crash in combination with the
groupheader-recycler, this will be fixed during the next
days.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/kitemviews/kfileitemmodel.h b/src/kitemviews/kfileitemmodel.h
index 7d10aad8e..8ccff95e8 100644
--- a/src/kitemviews/kfileitemmodel.h
+++ b/src/kitemviews/kfileitemmodel.h
@@ -194,6 +194,16 @@ private:
 
     bool useMaximumUpdateInterval() const;
 
+    QList<QPair<int, QVariant> > nameRoleGroups() const;
+    QList<QPair<int, QVariant> > sizeRoleGroups() const;
+    QList<QPair<int, QVariant> > dateRoleGroups() const;
+    QList<QPair<int, QVariant> > permissionRoleGroups() const;
+    QList<QPair<int, QVariant> > ownerRoleGroups() const;
+    QList<QPair<int, QVariant> > groupRoleGroups() const;
+    QList<QPair<int, QVariant> > typeRoleGroups() const;
+    QList<QPair<int, QVariant> > destinationRoleGroups() const;
+    QList<QPair<int, QVariant> > pathRoleGroups() const;
+
 private:
     QWeakPointer<KDirLister> m_dirLister;
 
@@ -214,6 +224,9 @@ private:
     KFileItemList m_pendingItemsToInsert;
     bool m_pendingEmitLoadingCompleted;
 
+    // Cache for KFileItemModel::groups()
+    mutable QList<QPair<int, QVariant> > m_groups;
+
     // Stores the smallest expansion level of the root-URL. Is required to calculate
     // the "expansionLevel" role in an efficient way. A value < 0 indicates that
     // it has not been initialized yet.