/*
    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
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    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
{
  public:
	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; }

  private:
	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*);
};

#endif /* __ardour_keyboard_h__ */