gtk2_ardour/panner2d.h

   1 /*
   2     Copyright (C) 2002 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 __ardour_panner_2d_h__
  21 #define __ardour_panner_2d_h__
  22
  23 #include <sys/types.h>
  24 #include <map>
  25 #include <string>
  26
  27 #include <glibmm/refptr.h>
  28 #include <gtkmm/drawingarea.h>
  29
  30 using std::map;
  31 using std::string;
  32
  33 namespace ARDOUR {
  34         class Panner;
  35 }
  36
  37 namespace Gtk {
  38         class Menu;
  39         class CheckMenuItem;
  40 }
  41
  42 namespace Pango {
  43         class Layout;
  44 }
  45
  46 class Panner2d : public Gtk::DrawingArea
  47 {
  48   public:
  49         Panner2d (ARDOUR::Panner&, int32_t height);
  50         ~Panner2d ();
  51
  52         int puck_position (int which_puck, float& x, float& y);
  53         int target_position (int which_target, float& x, float& y);
  54
  55         void allow_x_motion(bool);
  56         void allow_y_motion(bool);
  57         void allow_target_motion (bool);
  58
  59         void hide_puck (int which);
  60         void show_puck (int which);
  61         int  add_target (float x, float y);
  62         int  add_puck (const char* text, float x, float y);
  63         void hide_target (int);
  64         void show_target (int);
  65         void remove_target (int);
  66         void drop_targets ();
  67         void drop_pucks ();
  68         void move_target (int, float x, float y);
  69         void move_puck (int, float x, float y);
  70         void reset (uint32_t n_inputs);
  71
  72         sigc::signal<void,int> PuckMoved;
  73         sigc::signal<void,int> TargetMoved;
  74
  75   protected:
  76         bool on_expose_event (GdkEventExpose *);
  77         bool on_button_press_event (GdkEventButton *);
  78         bool on_button_release_event (GdkEventButton *);
  79         bool on_motion_notify_event (GdkEventMotion *);
  80         void on_size_allocate (Gtk::Allocation& alloc);
  81
  82   private:
  83         struct Target {
  84             float x;
  85             float y;
  86             bool visible;
  87             char* text;
  88             size_t textlen;
  89
  90             Target (float xa, float ya, const char* txt = 0);
  91             ~Target ();
  92         };
  93
  94         ARDOUR::Panner& panner;
  95         Gtk::Menu* context_menu;
  96         Gtk::CheckMenuItem* bypass_menu_item;
  97         Glib::RefPtr<Pango::Layout> layout;
  98
  99         typedef std::map<int,Target *> Targets;
 100         Targets targets;
 101         Targets pucks;
 102
 103         Target *drag_target;
 104         int     drag_index;
 105         bool    drag_is_puck;
 106         bool  allow_x;
 107         bool  allow_y;
 108         bool  allow_target;
 109         int width;
 110         int height;
 111
 112         bool bypassflag;
 113
 114         gint compute_x (float);
 115         gint compute_y (float);
 116
 117         Target *find_closest_object (gdouble x, gdouble y, int& which, bool& is_puck) const;
 118
 119         gint handle_motion (gint, gint, GdkModifierType);
 120
 121         void toggle_bypass ();
 122         void show_context_menu ();
 123         void handle_state_change ();
 124 };
 125
 126 #endif /* __ardour_panner_2d_h__ */