Probably fixed #121.

resources/text/CHANGELOG

@@ -24,6 +24,7 @@
   Fixed:
   <ul>
     <li>Categories are now not expanded when selected using "Go to next/previous item" in feeds list. (bug #122)</li>
+    <li>Added action to expand/collapse currently selected item in feeds list. (enhancement #121)</li>
   <ul>
   
   <hr/>

src/gui/dialogs/formmain.cpp

@@ -278,6 +278,7 @@ void FormMain::setupIcons() {
   m_ui->m_actionSelectPreviousMessage->setIcon(icon_theme_factory->fromTheme(QSL("go-up")));
   m_ui->m_actionShowOnlyUnreadFeeds->setIcon(icon_theme_factory->fromTheme(QSL("mail-mark-unread")));
   m_ui->m_actionFetchFeedMetadata->setIcon(icon_theme_factory->fromTheme(QSL("download-manager")));
+  m_ui->m_actionExpandCollapseFeedCategory->setIcon(icon_theme_factory->fromTheme(QSL("expand-collapse")));
 
   // Setup icons for underlying components: opened web browsers...
   foreach (WebBrowser *browser, WebBrowser::runningWebBrowsers()) {

src/gui/dialogs/formmain.ui

@@ -146,6 +146,7 @@
     <addaction name="m_actionFetchFeedMetadata"/>
     <addaction name="separator"/>
     <addaction name="m_actionShowOnlyUnreadFeeds"/>
+    <addaction name="m_actionExpandCollapseFeedCategory"/>
     <addaction name="separator"/>
     <addaction name="m_actionSelectNextFeedCategory"/>
     <addaction name="m_actionSelectPreviousFeedCategory"/>
@@ -671,6 +672,14 @@
     <string notr="true">Ctrl+Shift+F</string>
    </property>
   </action>
+  <action name="m_actionExpandCollapseFeedCategory">
+   <property name="text">
+    <string>&amp;Expand/collapse selected feed/category</string>
+   </property>
+   <property name="shortcut">
+    <string notr="true">E</string>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>

src/gui/feedmessageviewer.cpp

@@ -317,6 +317,7 @@ void FeedMessageViewer::updateFeedButtonsAvailability() {
   form_main->m_ui->m_actionUpdateSelectedFeeds->setEnabled(!critical_action_running && feed_selected);
   form_main->m_ui->m_actionViewSelectedItemsNewspaperMode->setEnabled(feed_selected);
   form_main->m_ui->m_actionFetchFeedMetadata->setEnabled(feed_selected);
+  form_main->m_ui->m_actionExpandCollapseFeedCategory->setEnabled(feed_selected);
   form_main->m_ui->m_menuAddItem->setEnabled(!critical_action_running);
 }
 
@@ -388,6 +389,8 @@ void FeedMessageViewer::createConnections() {
           SIGNAL(triggered()), m_feedsView, SLOT(markAllFeedsRead()));
   connect(form_main->m_ui->m_actionMarkSelectedFeedsAsRead,
           SIGNAL(triggered()), m_feedsView, SLOT(markSelectedFeedsRead()));
+  connect(form_main->m_ui->m_actionExpandCollapseFeedCategory,
+          SIGNAL(triggered()), m_feedsView, SLOT(expandCollapseCurrentItem()));
   connect(form_main->m_ui->m_actionFetchFeedMetadata, SIGNAL(triggered()),
           m_feedsView, SLOT(fetchMetadataForSelectedFeed()));
   connect(form_main->m_ui->m_actionMarkSelectedFeedsAsUnread,

src/gui/feedsview.cpp

@@ -143,6 +143,19 @@ void FeedsView::invalidateReadFeedsFilter(bool set_new_value, bool show_unread_o
   QTimer::singleShot(0, m_proxyModel, SLOT(invalidateFilter()));
 }
 
+void FeedsView::expandCollapseCurrentItem() {
+  if (selectionModel()->selectedRows().size() == 1) {
+    QModelIndex index = selectionModel()->selectedRows().at(0);
+
+    if (!index.child(0, 0).isValid() && index.parent().isValid()) {
+      setCurrentIndex(index.parent());
+      index = index.parent();
+    }
+
+    isExpanded(index) ? collapse(index) : expand(index);
+  }
+}
+
 void FeedsView::updateAllFeeds() {
   emit feedsUpdateRequested(allFeeds());
 }
@@ -480,7 +493,6 @@ void FeedsView::selectNextItem() {
 
   if (index_next.isValid()) {
     setCurrentIndex(index_next);
-    selectionModel()->select(index_next, QItemSelectionModel::Select | QItemSelectionModel::Rows);
     setFocus();
   }
 }
@@ -498,7 +510,6 @@ void FeedsView::selectPreviousItem() {
 
   if (index_previous.isValid()) {
     setCurrentIndex(index_previous);
-    selectionModel()->select(index_previous, QItemSelectionModel::Select | QItemSelectionModel::Rows);
     setFocus();
   }
 }
@@ -651,7 +662,7 @@ void FeedsView::validateItemAfterDragDrop(const QModelIndex &source_index) {
   QModelIndex mapped = m_proxyModel->mapFromSource(source_index);
 
   if (mapped.isValid()) {
-    setExpanded(mapped, true);
+    expand(mapped);
     setCurrentIndex(mapped);
   }
 }

src/gui/feedsview.h

@@ -69,6 +69,8 @@ class FeedsView : public QTreeView {
 
   public slots:
     void invalidateReadFeedsFilter(bool set_new_value = false, bool show_unread_only = false);
+    void expandCollapseCurrentItem();
+    void fetchMetadataForSelectedFeed();
 
     // Feed updating.
     void updateAllFeeds();
@@ -82,8 +84,6 @@ class FeedsView : public QTreeView {
     void markAllFeedsReadStatus(int read);
     void markAllFeedsRead();
 
-    void fetchMetadataForSelectedFeed();
-
     // Newspaper accessors.
     void openSelectedFeedsInNewspaperMode();