add the notion of a "tip widget" for all option editor elements, allowing us to add tooltips to each item; add one such proto-tool-tip

git-svn-id: svn://localhost/ardour2/branches/3.0@13236 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 22 insertions, 0 deletions

diff --git a/gtk2_ardour/option_editor.h b/gtk2_ardour/option_editor.h
index b896411a71..3e64e4f125 100644
--- a/gtk2_ardour/option_editor.h
+++ b/gtk2_ardour/option_editor.h
@@ -74,6 +74,8 @@ public:
 
 	void set_note (std::string const &);
 
+        virtual Gtk::Widget& tip_widget() = 0;
+
 private:
 	void maybe_add_note (OptionEditorPage *, int);
 	
@@ -90,6 +92,8 @@ public:
 	void set_state_from_config () {}
 	void add_to_page (OptionEditorPage *);
 
+        Gtk::Widget& tip_widget() { return *_label; }
+
 private:
 	Gtk::Label* _label; ///< the label used for the heading
 };
@@ -110,6 +114,8 @@ public:
 	void set_state_from_config () = 0;
 	void add_to_page (OptionEditorPage *);
 
+        Gtk::Widget& tip_widget() { return *_box->children().front().get_widget(); }
+
 protected:
 
 	Gtk::VBox* _box; ///< constituent box for subclasses to add widgets to
@@ -163,6 +169,8 @@ public:
 		_button->set_sensitive (yn);
 	}
 
+        Gtk::Widget& tip_widget() { return *_button; }
+
 private:
 
 	void toggled ();
@@ -181,6 +189,8 @@ public:
 	void set_state_from_config ();
 	void add_to_page (OptionEditorPage*);
 
+        Gtk::Widget& tip_widget() { return *_entry; }
+
 private:
 
 	void activated ();
@@ -263,6 +273,8 @@ public:
 		_combo->set_sensitive (yn);
 	}
 
+        Gtk::Widget& tip_widget() { return *_combo; }
+
 private:
 
 	sigc::slot<T> _get;
@@ -294,6 +306,8 @@ public:
 	void changed ();
 	void set_sensitive (bool);
 
+        Gtk::Widget& tip_widget() { return *_combo; }
+
 private:
 
 	sigc::slot<bool> _get;
@@ -370,6 +384,8 @@ public:
 		_set (static_cast<T> (_spin->get_value ()) * _scale);
 	}
 
+        Gtk::Widget& tip_widget() { return *_spin; }
+
 private:
 	sigc::slot<T> _get;
 	sigc::slot<bool, T> _set;
@@ -387,6 +403,8 @@ public:
 	void set_state_from_config ();
 	void add_to_page (OptionEditorPage *);
 
+        Gtk::Widget& tip_widget() { return *_db_slider; }
+
 private:
 	void db_changed ();
 
@@ -410,6 +428,8 @@ public:
 	void add_to_page (OptionEditorPage *);
 	void set_session (ARDOUR::Session *);
 
+        Gtk::Widget& tip_widget() { return _clock; }
+
 private:
 	Gtk::Label _label;
 	AudioClock _clock;
@@ -425,6 +445,8 @@ public:
 	void set_state_from_config ();
 	void add_to_page (OptionEditorPage *);
 
+        Gtk::Widget& tip_widget() { return _file_chooser; }
+
 private:
 	void file_set ();
 	void current_folder_set ();