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    Copyright (C) 2001 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_keyboard_h__
#define __ardour_keyboard_h__

#include <vector>
#include <string>

#include <sigc++/signal.h>
#include <gtk/gtk.h>

#include <ardour/types.h>
#include <pbd/stateful.h>

#include "selection.h"

using std::vector;
using std::string;

class Keyboard : public sigc::trackable, Stateful
      Keyboard ();
      ~Keyboard ();

      XMLNode& get_state (void);
      int set_state (const XMLNode&);

      typedef vector<uint32_t> State;
      typedef uint32_t ModifierMask;

      static uint32_t Control;
      static uint32_t Shift;
      static uint32_t Alt;
      static uint32_t Meta;

      bool key_is_down (uint32_t keyval);

      static GdkModifierType RelevantModifierKeyMask;

      static bool no_modifier_keys_pressed(GdkEventButton* ev) {
            return (ev->state & RelevantModifierKeyMask) == 0;

      bool leave_window (GdkEventCrossing *ev, Gtk::Window*);
      bool enter_window (GdkEventCrossing *ev, Gtk::Window*);

      static bool modifier_state_contains (guint state, ModifierMask);
      static bool modifier_state_equals   (guint state, ModifierMask);

      static Selection::Operation selection_type (guint state);

      static bool no_modifiers_active (guint state);

      static void set_meta_modifier (guint);

      static void set_snap_modifier (guint);
      static ModifierMask snap_modifier () { return ModifierMask (snap_mod); }

      static guint edit_button() { return edit_but; }
      static void set_edit_button (guint);
      static guint edit_modifier() { return edit_mod; }
      static void set_edit_modifier(guint);

      static guint delete_button() { return delete_but; }
      static void set_delete_button(guint);
      static guint delete_modifier() { return delete_mod; }
      static void set_delete_modifier(guint);

      static bool is_edit_event (GdkEventButton*);
      static bool is_delete_event (GdkEventButton*);
      static bool is_context_menu_event (GdkEventButton*);

      static Keyboard& the_keyboard() { return *_the_keyboard; }

      static bool some_magic_widget_has_focus ();
      static void magic_widget_grab_focus ();
      static void magic_widget_drop_focus ();

      static Keyboard* _the_keyboard;

      guint           snooper_id;
      State           state;

      static guint     edit_but;
      static guint     edit_mod;
      static guint     delete_but;
      static guint     delete_mod;
      static guint     snap_mod;

      static gint _snooper (GtkWidget*, GdkEventKey*, gpointer);
      gint snooper (GtkWidget*, GdkEventKey*);

      static bool _some_magic_widget_has_focus;

#endif /* __ardour_keyboard_h__ */

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