/*
 *  display.h
 *	part of galculator
 *  	(c) 2002-2014 Simon Flöry (simon.floery@rechenraum.com)
 *
 *  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 Library 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
 
#ifndef _DISPLAY_H
#define _DISPLAY_H 1

#define DISPLAY_RESULT_PRECISION	12
#define DISPLAY_RESULT_E_LENGTH		3

#define DISPLAY_MARK_NUMBER		"mark_number"
#define DISPLAY_MARK_ANGLE		"mark_angle"
#define DISPLAY_MARK_NOTATION	"mark_notation"
#define DISPLAY_MARK_ARITH		"mark_arith"
#define DISPLAY_MARK_BRACKET	"mark_bracket"

#define DISPLAY_MODULES_DELIM 		"   "

enum {
	DISPLAY_OPT_NUMBER,
	DISPLAY_OPT_ANGLE,
	DISPLAY_OPT_NOTATION
};

enum {
	ONE_MORE,
	ONE_LESS,
	RESET,
	GET,
	NOP
};

extern gboolean calc_entry_start_new;

/* general */


G_MODULE_EXPORT gboolean on_textview_button_press_event (GtkWidget *widget,
							GdkEventButton *event,
							gpointer user_data);
G_MODULE_EXPORT void on_textview_selection_received (GtkWidget *widget,
							GtkSelectionData *data,
							guint time,
							gpointer user_data);
void display_init ();
void display_update_modules ();
void display_option_label_set (GtkLabel *label);
void display_option_label_unset (GtkLabel *label);
void display_change_option (int old_status, int new_status, int opt_group);
void display_option_cb (GtkWidget *widget, GdkEventButton *event, gpointer label_text);
void display_set_bkg_color (char *color_string);
void display_update_tags ();
void display_module_arith_label_update (char operation);
int display_module_bracket_label_update (int option);
void display_module_number_activate (int number_base);
void display_module_angle_activate (int angle_unit);
void display_module_notation_activate (int mode);

/* the result field */

/* there are some static functions declared in the header of display.c */
void display_result_set (char *string_value, int update_display_value, G_REAL value);
void display_result_set_double (G_REAL value, int number_base_status);
void display_result_add_digit (char digit, int number_base_status);
void display_result_feed (char *string, int number_base_status);

char *display_result_get ();
G_REAL display_result_get_double (int number_base_status);
void display_append_e (GtkToggleButton *button);
void display_result_toggle_sign (GtkToggleButton *button);
void display_result_backspace (int number_base_status);
void display_result_getset ();

void display_stack_create ();
void display_stack_remove ();
void display_stack_set_yzt (char **stack);
void display_stack_set_yzt_double (G_REAL *stack, int number_base_status);
char **display_stack_get_yzt ();
G_REAL *display_stack_get_yzt_double (int number_base_status);

#endif /* display.h */
