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    Copyright (C) 2002 Paul Davis

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.


#ifndef __ardour_panner_2d_h__
#define __ardour_panner_2d_h__

#include <sys/types.h>
#include <map>
#include <string>

#include <glibmm/refptr.h>
#include <gtkmm/drawingarea.h>

using std::map;
using std::string;

namespace ARDOUR {
      class Panner;

namespace Gtk {
      class Menu;
      class CheckMenuItem;

namespace Pango {
      class Layout;

class Panner2d : public Gtk::DrawingArea
      Panner2d (ARDOUR::Panner&, int32_t height);
      ~Panner2d ();
      int puck_position (int which_puck, float& x, float& y);
      int target_position (int which_target, float& x, float& y);

      void allow_x_motion(bool);
      void allow_y_motion(bool);
      void allow_target_motion (bool);

      void hide_puck (int which);
      void show_puck (int which);
      int  add_target (float x, float y);
      int  add_puck (const char* text, float x, float y);
      void hide_target (int);
      void show_target (int);
      void remove_target (int);
      void drop_targets ();
      void drop_pucks ();
      void move_target (int, float x, float y);
      void move_puck (int, float x, float y);
      void reset (uint32_t n_inputs);

      sigc::signal<void,int> PuckMoved;
      sigc::signal<void,int> TargetMoved;

      bool on_expose_event (GdkEventExpose *);
      bool on_button_press_event (GdkEventButton *);
      bool on_button_release_event (GdkEventButton *);
      bool on_motion_notify_event (GdkEventMotion *);
      void on_size_allocate (Gtk::Allocation& alloc);

      struct Target {
          float x;
          float y;
          bool visible;
          char* text;
          size_t textlen;

          Target (float xa, float ya, const char* txt = 0);
          ~Target ();

      ARDOUR::Panner& panner;
      Gtk::Menu* context_menu;
      Gtk::CheckMenuItem* bypass_menu_item;
      Glib::RefPtr<Pango::Layout> layout;

      typedef std::map<int,Target *> Targets;
      Targets targets;
      Targets pucks;

      Target *drag_target;
      int     drag_index;
      bool    drag_is_puck;
      bool  allow_x;
      bool  allow_y;
      bool  allow_target;
      int width;
      int height;

      bool bypassflag;
      gint compute_x (float);
      gint compute_y (float);

      Target *find_closest_object (gdouble x, gdouble y, int& which, bool& is_puck) const;

      gint handle_motion (gint, gint, GdkModifierType);

      void toggle_bypass ();
      void show_context_menu ();
      void handle_state_change ();

#endif /* __ardour_panner_2d_h__ */

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