improve encapsulation of history window object * history-dockwidget.h, history-dockwidget.cc (history_dock_widget::history_dock_widget): Set status tip here. Connect history_dock_widget::information signal to main_window::report_status_message. Connect history_dock_widget::command_double_clicked signal to main_window::handle_command_double_clicked. (history_dock_widget::connect_visibility_changed, history_dock_widget::focus, history_dock_widget::handle_visibility): New functions. * main-window.h, main-window.cc (main_window::history_window): Rename from _history_dock_widget. Don't use a pointer. Change all uses. (main_window::main_window): Initialize it here. (main_window::~main_window): Don't delete _history_dock_widget. (main_window::focus_history_window_signal): New signal. (main_window::focus_history_window): Rename from main_window::focus_command_history. Emit focus_history_window_signal instead of performing actions here. (main_window::handle_command_history_visible): Delete. (main_window::connect_visibility_changed): Call history_window.connect_visibility_changed instead of performing actions here. (main_window::construct): Don't create _history_dock_widget. Adapt signal/slot connections for new history_window object.

--- a/libgui/src/history-dockwidget.h	Sat Apr 06 16:14:32 2013 -0400
+++ b/libgui/src/history-dockwidget.h	Sat Apr 06 16:46:14 2013 -0400
@@ -32,27 +32,38 @@
 class history_dock_widget : public octave_dock_widget
 {
   Q_OBJECT
-  public:
+
+public:
+
   history_dock_widget (QWidget *parent = 0);
 
+  void connect_visibility_changed (void);
+
 public slots:
+
   void set_history (const QStringList& hist);
   void append_history (const QString& hist_entry);
   void clear_history (void);
 
+  void focus (void);
+  void handle_visibility (bool);
+
 signals:
+
   void information (const QString& message);
 
   /** Emitted, whenever the user double-clicked a command in the history. */
   void command_double_clicked (const QString& command);
 
 private slots:
+
   void handle_double_click (QModelIndex modelIndex);
   void handle_contextmenu_copy(bool flag);
   void handle_contextmenu_evaluate(bool flag);
   void ctxMenu(const QPoint &pos);
 
 private:
+
   void construct ();
   QListView *_history_list_view;
   QLineEdit *_filter_line_edit;