Switchable feed tree branches/arrows.

resources/skins/dark/theme.css

@@ -15,63 +15,6 @@ QMenu {
   border: 1px solid #3a4047;
 }
 
-QTreeView::branch:has-siblings:!adjoins-item  {
-  border-image: url(qss/dummy.png) 0;
-}
-
-QTreeView::branch:has-siblings:adjoins-item {
-  border-image: url(qss/dummy.png) 0;
-}
-
-QTreeView::branch:!has-children:!has-siblings:adjoins-item  {
-  border-image: url(qss/dummy.png) 0;
-}
-
-QTreeView::branch:has-children:!has-siblings:closed,
-QTreeView::branch:closed:has-children:has-siblings  {
-  border-image: none;
-  image: url(qss/branch-closed.png);
-}
-
-QTreeView::branch:open:has-children:!has-siblings,
-QTreeView::branch:open:has-children:has-siblings  {
-  border-image: none;
-  image: url(qss/branch-open.png);
-}
-
-QTreeView[hideTree="true"]::branch:!has-chlidren:hasSiblings {
-  border-image: none;
-  image: none;
-}
-
-QTreeView::branch {
-  background-color: rgb(39, 43, 48);
-}
-
-QTreeView::item {
-  padding: 1px 1px 1px 1px;
-  border: 1px transparent;
-  border-top-color: transparent;
-  border-bottom-color: transparent;
-}
-
-QTreeView::item:hover {
-  background-color: #1b8cbc;
-  border: 1px transparent;
-}
-
-QTreeView::item:selected {
-  border: 1px transparent;
-}
-
-QTreeView::item:selected:active{
-  background-color: #3e444c;
-}
-
-QTreeView::item:selected:!active {
-  background-color: #3e444c;
-}
-
 QStatusBar::item {
   border: none;
 }

resources/skins/vergilius/theme.css

@@ -1,38 +1,5 @@
 /* This is Qt CSS theme file for the overall GUI of the application. */
 
-QTreeView::branch:has-siblings:!adjoins-item  {
-  border-image: url(qss/dummy.png) 0;
-}
-
-QTreeView::branch:has-siblings:adjoins-item {
-  border-image: url(qss/dummy.png) 0;
-}
-
-QTreeView::branch:!has-children:!has-siblings:adjoins-item  {
-  border-image: url(qss/dummy.png) 0;
-}
-
-QTreeView::branch:has-children:!has-siblings:closed,
-QTreeView::branch:closed:has-children:has-siblings  {
-  border-image: none;
-  image: url(qss/branch-closed.png);
-}
-
-QTreeView::branch:open:has-children:!has-siblings,
-QTreeView::branch:open:has-children:has-siblings  {
-  border-image: none;
-  image: url(qss/branch-open.png);
-}
-
-QTreeView::item {
-  padding: 1px 1px 1px 1px;
-} 
-
-QTreeView[hideTree="true"]::branch:!has-chlidren:hasSiblings {
-  border-image: none;
-  image: none;
-}
-
 QTextEdit {
   selection-background-color: #3297FD;
 }

src/librssguard/gui/dialogs/formmain.cpp

@@ -160,6 +160,7 @@ QList<QAction*> FormMain::allActions() const {
   actions << m_ui->m_actionClearSelectedItems;
   actions << m_ui->m_actionClearAllItems;
   actions << m_ui->m_actionShowOnlyUnreadItems;
+  actions << m_ui->m_actionShowTreeBranches;
   actions << m_ui->m_actionShowOnlyUnreadMessages;
   actions << m_ui->m_actionMarkSelectedMessagesAsRead;
   actions << m_ui->m_actionMarkSelectedMessagesAsUnread;
@@ -586,6 +587,8 @@ void FormMain::loadSize() {
   // Make sure that only unread feeds/messages are shown if user has that feature set on.
   m_ui->m_actionShowOnlyUnreadItems->setChecked(settings->value(GROUP(Feeds),
                                                                 SETTING(Feeds::ShowOnlyUnreadFeeds)).toBool());
+  m_ui->m_actionShowTreeBranches->setChecked(settings->value(GROUP(Feeds),
+                                                             SETTING(Feeds::ShowTreeBranches)).toBool());
   m_ui->m_actionShowOnlyUnreadMessages->setChecked(settings->value(GROUP(Messages),
                                                                    SETTING(Messages::ShowOnlyUnreadMessages)).toBool());
 }
@@ -747,6 +750,8 @@ void FormMain::createConnections() {
           tabWidget()->feedMessageViewer(), &FeedMessageViewer::switchMessageSplitterOrientation);
   connect(m_ui->m_actionShowOnlyUnreadItems, &QAction::toggled,
           tabWidget()->feedMessageViewer(), &FeedMessageViewer::toggleShowOnlyUnreadFeeds);
+  connect(m_ui->m_actionShowTreeBranches, &QAction::toggled,
+          tabWidget()->feedMessageViewer(), &FeedMessageViewer::toggleShowFeedTreeBranches);
   connect(m_ui->m_actionShowOnlyUnreadMessages, &QAction::toggled,
           tabWidget()->feedMessageViewer(), &FeedMessageViewer::toggleShowOnlyUnreadMessages);
   connect(m_ui->m_actionRestoreSelectedMessages, &QAction::triggered,

src/librssguard/gui/dialogs/formmain.ui

@@ -114,6 +114,7 @@
     <addaction name="m_actionDeleteSelectedItem"/>
     <addaction name="separator"/>
     <addaction name="m_actionShowOnlyUnreadItems"/>
+    <addaction name="m_actionShowTreeBranches"/>
     <addaction name="m_actionExpandCollapseItem"/>
     <addaction name="separator"/>
     <addaction name="m_actionSelectNextItem"/>
@@ -766,6 +767,14 @@
     <string>Message &amp;filters</string>
    </property>
   </action>
+  <action name="m_actionShowTreeBranches">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>&amp;Show tree branches</string>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>

src/librssguard/gui/feedmessageviewer.cpp

@@ -189,6 +189,13 @@ void FeedMessageViewer::toggleShowOnlyUnreadFeeds() {
   }
 }
 
+void FeedMessageViewer::toggleShowFeedTreeBranches() {
+  const QAction* origin = qobject_cast<QAction*>(sender());
+
+  m_feedsView->setRootIsDecorated(origin->isChecked());
+  qApp->settings()->setValue(GROUP(Feeds), Feeds::ShowTreeBranches, origin->isChecked());
+}
+
 void FeedMessageViewer::displayMessage(const Message& message, RootItem* root) {
   if (qApp->settings()->value(GROUP(Messages), SETTING(Messages::EnableMessagePreview)).toBool()) {
     m_messagesBrowser->loadMessage(message, root);

src/librssguard/gui/feedmessageviewer.h

@@ -66,6 +66,7 @@ class RSSGUARD_DLLSPEC FeedMessageViewer : public TabContent {
 
     void toggleShowOnlyUnreadMessages();
     void toggleShowOnlyUnreadFeeds();
+    void toggleShowFeedTreeBranches();
 
   private slots:
     void displayMessage(const Message& message, RootItem* root);

src/librssguard/gui/feedsview.cpp

@@ -476,6 +476,19 @@ void FeedsView::switchVisibility() {
   setVisible(!isVisible());
 }
 
+void FeedsView::drawBranches(QPainter* painter, const QRect& rect, const QModelIndex& index) const {
+  if (!rootIsDecorated()) {
+    painter->save();
+    painter->setOpacity(0.0);
+  }
+
+  QTreeView::drawBranches(painter, rect, index);
+
+  if (!rootIsDecorated()) {
+    painter->restore();
+  }
+}
+
 void FeedsView::focusInEvent(QFocusEvent* event) {
   QTreeView::focusInEvent(event);
 
@@ -608,6 +621,7 @@ void FeedsView::setupAppearance() {
   setAnimated(true);
   setSortingEnabled(true);
   setItemsExpandable(true);
+  setAutoExpandDelay(0);
   setExpandsOnDoubleClick(true);
   setEditTriggers(QAbstractItemView::NoEditTriggers);
   setIndentation(FEEDS_VIEW_INDENTATION);

src/librssguard/gui/feedsview.h

@@ -17,19 +17,11 @@ class RSSGUARD_DLLSPEC FeedsView : public QTreeView {
   Q_OBJECT
 
   public:
-
-    // Constructors and destructors.
     explicit FeedsView(QWidget* parent = nullptr);
     virtual ~FeedsView();
 
-    // Fundamental accessors.
-    inline FeedsProxyModel* model() const {
-      return m_proxyModel;
-    }
-
-    inline FeedsModel* sourceModel() const {
-      return m_sourceModel;
-    }
+    FeedsProxyModel* model() const;
+    FeedsModel* sourceModel() const;
 
     void reloadFontSettings();
 
@@ -89,6 +81,7 @@ class RSSGUARD_DLLSPEC FeedsView : public QTreeView {
     void openMessagesInNewspaperView(RootItem* root, const QList<Message>& messages);
 
   protected:
+    void drawBranches(QPainter* painter, const QRect& rect, const QModelIndex& index) const;
     void focusInEvent(QFocusEvent* event);
     void selectionChanged(const QItemSelection& selected, const QItemSelection& deselected);
     void keyPressEvent(QKeyEvent* event);
@@ -132,4 +125,12 @@ class RSSGUARD_DLLSPEC FeedsView : public QTreeView {
     FeedsProxyModel* m_proxyModel;
 };
 
+inline FeedsProxyModel* FeedsView::model() const {
+  return m_proxyModel;
+}
+
+inline FeedsModel* FeedsView::sourceModel() const {
+  return m_sourceModel;
+}
+
 #endif // FEEDSVIEW_H

src/librssguard/miscellaneous/settings.cpp

@@ -63,6 +63,10 @@ DKEY Feeds::ShowOnlyUnreadFeeds = "show_only_unread_feeds";
 
 DVALUE(bool) Feeds::ShowOnlyUnreadFeedsDef = false;
 
+DKEY Feeds::ShowTreeBranches = "show_tree_branches";
+
+DVALUE(bool) Feeds::ShowTreeBranchesDef = true;
+
 DKEY Feeds::ListFont = "list_font";
 
 // Messages.

src/librssguard/miscellaneous/settings.h

@@ -84,6 +84,10 @@ namespace Feeds {
 
   VALUE(bool) ShowOnlyUnreadFeedsDef;
 
+  KEY ShowTreeBranches;
+
+  VALUE(bool) ShowTreeBranchesDef;
+
   KEY ListFont;
 }