gtk2_ardour/stereo_panner.h

   1 /*
   2     Copyright (C) 2010 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #ifndef __gtk_ardour_stereo_panner_h__
  21 #define __gtk_ardour_stereo_panner_h__
  22
  23 #include "pbd/signals.h"
  24
  25 #include <gtkmm/drawingarea.h>
  26 #include <boost/shared_ptr.hpp>
  27
  28 namespace PBD {
  29         class Controllable;
  30 }
  31
  32 class StereoPanner : public Gtk::DrawingArea
  33 {
  34   public:
  35         StereoPanner (boost::shared_ptr<PBD::Controllable> pos, boost::shared_ptr<PBD::Controllable> width);
  36         ~StereoPanner ();
  37
  38   protected:
  39         bool on_expose_event (GdkEventExpose*);
  40         bool on_button_press_event (GdkEventButton*);
  41         bool on_button_release_event (GdkEventButton*);
  42         bool on_motion_notify_event (GdkEventMotion*);
  43         bool on_scroll_event (GdkEventScroll*);
  44         bool on_key_press_event (GdkEventKey*);
  45         bool on_key_release_event (GdkEventKey*);
  46         bool on_enter_notify_event (GdkEventCrossing* ev);
  47         bool on_leave_notify_event (GdkEventCrossing* ev);
  48
  49   private:
  50         boost::shared_ptr<PBD::Controllable> position_control;
  51         boost::shared_ptr<PBD::Controllable> width_control;
  52         PBD::ScopedConnectionList connections;
  53         bool dragging;
  54         bool dragging_position;
  55         bool dragging_left;
  56         bool dragging_right;
  57         int drag_start_x;
  58         int last_drag_x;
  59         double accumulated_delta;
  60         bool detented;
  61
  62         Gtk::Window* drag_data_window;
  63         Gtk::Label* drag_data_label;
  64
  65         void value_change ();
  66         void set_drag_data ();
  67         void set_tooltip ();
  68         void unset_tooltip ();
  69
  70         struct ColorScheme {
  71             uint32_t outline;
  72             uint32_t fill;
  73             uint32_t text;
  74             uint32_t background;
  75         };
  76
  77         enum State {
  78                 Normal,
  79                 Mono,
  80                 Inverted
  81         };
  82
  83         static ColorScheme colors[3];
  84         static void set_colors ();
  85         static bool have_colors;
  86         static PBD::Signal0<void> color_change;
  87 };
  88
  89 #endif /* __gtk_ardour_stereo_panner_h__ */