Allow styling of translate line and word list dependent on the current group by introducing a currentGroup Qt property.

To use, create ~/.goldendict/qt-style.css like this:

MainWindow #searchPane #translateLine[currentGroup="En"], MainWindow #searchPane #wordList[currentGroup="En"]
{
  background: white;
  color: black;
  font-size: 20px;
}

articleview.cc

@@ -1183,14 +1183,7 @@ void ArticleView::openSearch()
     ui.searchText->setProperty( "noResults", false );
 
     // Reload stylesheet
-    for( QWidget * w = parentWidget(); w; w = w->parentWidget() )
-    {
-      if ( w->styleSheet().size() )
-      {
-        w->setStyleSheet( w->styleSheet() );
-        break;
-      }
-    }
+    reloadStyleSheet();
   }
 }
 
@@ -1275,17 +1268,23 @@ void ArticleView::performFindOperation( bool restart, bool backwards )
     ui.searchText->setProperty( "noResults", setMark );
 
     // Reload stylesheet
-    for( QWidget * w = parentWidget(); w; w = w->parentWidget() )
+    reloadStyleSheet();
+  }
+}
+
+void ArticleView::reloadStyleSheet()
+{
+  for( QWidget * w = parentWidget(); w; w = w->parentWidget() )
+  {
+    if ( w->styleSheet().size() )
     {
-      if ( w->styleSheet().size() )
-      {
-        w->setStyleSheet( w->styleSheet() );
-        break;
-      }
+      w->setStyleSheet( w->styleSheet() );
+      break;
     }
   }
 }
 
+
 bool ArticleView::closeSearch()
 {
   if ( searchIsOpened )

articleview.hh

@@ -240,6 +240,8 @@ private:
 
   void performFindOperation( bool restart, bool backwards );
 
+  void reloadStyleSheet();
+
   /// Returns the comma-separated list of dictionary ids which should be muted
   /// for the given group. If there are none, returns empty string.
   QString getMutedForGroup( unsigned group );

mainwindow.cc

@@ -664,6 +664,7 @@ void MainWindow::updateGroupList()
 
   groupList.fill( groupInstances );
   groupList.setCurrentGroup( cfg.lastMainGroupId );
+  updateCurrentGroupProperty();
 
   updateDictionaryBar();
 
@@ -1063,6 +1064,29 @@ void MainWindow::currentGroupChanged( QString const & )
   // Update word search results
 
   translateInputChanged( ui.translateLine->text() );
+
+  updateCurrentGroupProperty();
+}
+
+void MainWindow::updateCurrentGroupProperty()
+{
+  // We maintain currentGroup property so styles could use that to change
+  // fonts based on group names
+  Instances::Group * grp =
+      groupInstances.findGroup( groupList.getCurrentGroup() );
+
+  if ( grp && ui.translateLine->property( "currentGroup" ).toString() !=
+       grp->name )
+  {
+    ui.translateLine->setProperty( "currentGroup", grp->name );
+    ui.wordList->setProperty( "currentGroup", grp->name );
+    QString ss = styleSheet();
+
+    // Only update stylesheet if it mentions currentGroup, as updating the
+    // stylesheet is a slow operation
+    if ( ss.contains("currentGroup") )
+      setStyleSheet( ss );
+  }
 }
 
 void MainWindow::translateInputChanged( QString const & newValue )

mainwindow.hh

@@ -136,6 +136,9 @@ private:
 
   void mousePressEvent ( QMouseEvent * event );
 
+  void updateCurrentGroupProperty();
+
+
 private slots:
 
   void hotKeyActivated( int );