Details view: Allow to turn off expandable folders like in Dolphin 1.7

The option for turning off expandable folders has been removed with
the new view-engine. Due to several requests this option has been
readded again.

As for 4.8.x no new user-interface strings may be introduced, the
line
  ExpandableFolders=false
must be manually added below the section "[DetailsMode]" in the file
~/.kde/share/config/dolphinrc if the expandable-folders feature
should be disabled.

Thanks to H.H. "cyberbeat" for the initial patch!

BUG: 289090
FIXED-IN: 4.8.2

1 files changed, 10 insertions, 3 deletions

diff --git a/src/kitemviews/kfileitemlistview.cpp b/src/kitemviews/kfileitemlistview.cpp
index 27ef7fdb5..796a45099 100644
--- a/src/kitemviews/kfileitemlistview.cpp
+++ b/src/kitemviews/kfileitemlistview.cpp
@@ -106,8 +106,6 @@ void KFileItemListView::setItemLayout(Layout layout)
             applyRolesToModel();
         }
         updateLayoutOfVisibleItems();
-
-        setSupportsItemExpanding(m_itemLayout == DetailsLayout);
     }
 }
 
@@ -324,6 +322,8 @@ void KFileItemListView::initializeItemListWidget(KItemListWidget* item)
     case DetailsLayout: fileItemListWidget->setLayout(KFileItemListWidget::DetailsLayout); break;
     default:            Q_ASSERT(false); break;
     }
+
+    fileItemListWidget->setSupportsItemExpanding(supportsItemExpanding());
 }
 
 bool KFileItemListView::itemSizeHintUpdateRequired(const QSet<QByteArray>& changedRoles) const
@@ -388,6 +388,13 @@ void KFileItemListView::onStyleOptionChanged(const KItemListStyleOption& current
     triggerIconSizeUpdate();
 }
 
+void KFileItemListView::onSupportsItemExpandingChanged(bool supportsExpanding)
+{
+    Q_UNUSED(supportsExpanding);
+    applyRolesToModel();
+    updateLayoutOfVisibleItems();
+}
+
 void KFileItemListView::onTransactionBegin()
 {
     m_modelRolesUpdater->setPaused(true);
@@ -569,7 +576,7 @@ void KFileItemListView::applyRolesToModel()
     roles.insert("iconName");
     roles.insert("name");
     roles.insert("isDir");
-    if (m_itemLayout == DetailsLayout) {
+    if (supportsItemExpanding()) {
         roles.insert("isExpanded");
         roles.insert("isExpandable");
         roles.insert("expandedParentsCount");