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 #include "gtkmm2ext/binding_proxy.h"
  29
  30 namespace PBD {
  31         class Controllable;
  32 }
  33
  34 namespace ARDOUR {
  35         class Panner;
  36 }
  37
  38 class StereoPanner : public Gtk::DrawingArea
  39 {
  40   public:
  41         StereoPanner (boost::shared_ptr<ARDOUR::Panner>);
  42         ~StereoPanner ();
  43
  44         sigc::signal<void> StartPositionGesture;
  45         sigc::signal<void> StopPositionGesture;
  46         sigc::signal<void> StartWidthGesture;
  47         sigc::signal<void> StopWidthGesture;
  48
  49   protected:
  50         bool on_expose_event (GdkEventExpose*);
  51         bool on_button_press_event (GdkEventButton*);
  52         bool on_button_release_event (GdkEventButton*);
  53         bool on_motion_notify_event (GdkEventMotion*);
  54         bool on_scroll_event (GdkEventScroll*);
  55         bool on_key_press_event (GdkEventKey*);
  56         bool on_key_release_event (GdkEventKey*);
  57         bool on_enter_notify_event (GdkEventCrossing* ev);
  58         bool on_leave_notify_event (GdkEventCrossing* ev);
  59
  60   private:
  61         boost::shared_ptr<ARDOUR::Panner> _panner;
  62         boost::shared_ptr<PBD::Controllable> position_control;
  63         boost::shared_ptr<PBD::Controllable> width_control;
  64         PBD::ScopedConnectionList connections;
  65         bool dragging;
  66         bool dragging_position;
  67         bool dragging_left;
  68         bool dragging_right;
  69         int drag_start_x;
  70         int last_drag_x;
  71         double accumulated_delta;
  72         bool detented;
  73
  74         Gtk::Window* drag_data_window;
  75         Gtk::Label* drag_data_label;
  76
  77         BindingProxy position_binder;
  78         BindingProxy width_binder;
  79
  80         void value_change ();
  81         void set_drag_data ();
  82
  83         struct ColorScheme {
  84             uint32_t outline;
  85             uint32_t fill;
  86             uint32_t text;
  87             uint32_t background;
  88             uint32_t rule;
  89         };
  90
  91         enum State {
  92                 Normal,
  93                 Mono,
  94                 Inverted
  95         };
  96
  97         static ColorScheme colors[3];
  98         static void set_colors ();
  99         static bool have_colors;
 100         void color_handler ();
 101 };
 102
 103 #endif /* __gtk_ardour_stereo_panner_h__ */