/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */

/* 
 * Author : 
 *  Damon Chaplin <damon@gtk.org>
 *
 * Copyright 1999, Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or 
 * modify it under the terms of version 2 of the GNU General Public 
 * License as published by the Free Software Foundation.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */
#ifndef _E_MEETING_TIME_SELECTOR_H_
#define _E_MEETING_TIME_SELECTOR_H_

#include <glib.h>
#include <gtk/gtkaccelgroup.h>
#include <gtk/gtktable.h>
#include <gtk/gtkwidget.h>
#include <libgnomecanvas/gnome-canvas.h>
#include <gal/e-text/e-text.h>
#include <gal/e-table/e-table-model.h>
#include <gal/e-table/e-table.h>
#include "e-meeting-store.h"
#include "e-meeting-list-view.h"

G_BEGIN_DECLS

/*
 * EMeetingTimeSelector displays a list of attendees for a meeting and a
 * graphical summary of the times which they are free and busy, allowing the
 * user to select an appropriate time for a meeting.
 */

/* Define this to include the debugging functions. */
#undef E_MEETING_TIME_SELECTOR_DEBUG

/* This is the width of the icon column in the attendees list. */
#define E_MEETING_TIME_SELECTOR_ICON_COLUMN_WIDTH	24

#define E_MEETING_TIME_SELECTOR_TEXT_Y_PAD		3
#define E_MEETING_TIME_SELECTOR_TEXT_X_PAD		2


/* This is used to specify the format used when displaying the dates.
   The full format is like 'Sunday, September 12, 1999'. The abbreviated format
   is like 'Sun 12/9/99'. The short format is like '12/9/99'. The actual
   format used is determined in e_meeting_time_selector_style_set(), once we
   know the font being used. */
typedef enum
{
	E_MEETING_TIME_SELECTOR_DATE_FULL,
	E_MEETING_TIME_SELECTOR_DATE_ABBREVIATED_DAY,
	E_MEETING_TIME_SELECTOR_DATE_SHORT
} EMeetingTimeSelectorDateFormat;


/* This is used to specify a position regarding the vertical bars around the
   current meeting time, so we know which one is being dragged. */
typedef enum
{
	E_MEETING_TIME_SELECTOR_POS_NONE,
	E_MEETING_TIME_SELECTOR_POS_START,
	E_MEETING_TIME_SELECTOR_POS_END
} EMeetingTimeSelectorPosition;


/* This is used to specify the autopick option, which determines how we choose
   the previous/next appropriate meeting time. */
typedef enum
{
	E_MEETING_TIME_SELECTOR_ALL_PEOPLE_AND_RESOURCES,
	E_MEETING_TIME_SELECTOR_ALL_PEOPLE_AND_ONE_RESOURCE,
	E_MEETING_TIME_SELECTOR_REQUIRED_PEOPLE,
	E_MEETING_TIME_SELECTOR_REQUIRED_PEOPLE_AND_ONE_RESOURCE
} EMeetingTimeSelectorAutopickOption;

/* An array of hour strings for 24 hour time, "0:00" .. "23:00". */
extern const gchar *EMeetingTimeSelectorHours[24];
/* An array of hour strings for 12 hour time, "12:00am" .. "11:00pm". */
extern const gchar *EMeetingTimeSelectorHours12[24];


#define E_MEETING_TIME_SELECTOR(obj)          GTK_CHECK_CAST (obj, e_meeting_time_selector_get_type (), EMeetingTimeSelector)
#define E_MEETING_TIME_SELECTOR_CLASS(klass)  GTK_CHECK_CLASS_CAST (klass, e_meeting_time_selector_get_type (), EMeetingTimeSelectorClass)
#define IS_E_MEETING_TIME_SELECTOR(obj)       GTK_CHECK_TYPE (obj, e_meeting_time_selector_get_type ())


typedef struct _EMeetingTimeSelector       EMeetingTimeSelector;
typedef struct _EMeetingTimeSelectorClass  EMeetingTimeSelectorClass;

struct _EMeetingTimeSelector
{
	/* We subclass a GtkTable which makes it easy to add extra widgets
	   if neccesary. */
	GtkTable table;

	/*
	 * User Interface stuff - widgets, colors etc.
	 */

	/* This contains our keyboard accelerators, which need to be added to
	   the toplevel window. */
	GtkAccelGroup *accel_group;

	/* The vbox in the top-left corner, containing the 'All Attendees'
	   title bar packed at the end. Extra widgets can be added here
	   with PACK_START if necessary. */
	GtkWidget *attendees_vbox;
	GtkWidget *attendees_vbox_spacer;
	
	/* The etable and model */
	EMeetingStore *model;
	EMeetingListView *list_view;
	
	/* The canvas displaying the dates, times, and the summary
	   'All Attendees' free/busy display. */
	GtkWidget *display_top;

	/* The canvas containing the free/busy displays of individual
	   attendees. This is separate from display_top since it also scrolls
	   vertically. */
	GtkWidget *display_main;

	/* This is the 'Options' button & menu. */
	GtkWidget *options_button;
	GtkWidget *options_menu;

	/* This is the 'Autopick' button, menu & radio menu items. */
	GtkWidget *autopick_button;
	GtkWidget *autopick_menu;
	GtkWidget *autopick_all_item;
	GtkWidget *autopick_all_people_one_resource_item;
	GtkWidget *autopick_required_people_item;
	GtkWidget *autopick_required_people_one_resource_item;

	/* The horizontal scrollbar which scrolls display_top & display_main.*/
	GtkWidget *hscrollbar;

	/* The vertical scrollbar which scrolls attendees & display_main. */
	GtkWidget *vscrollbar;

	/* The 2 EDateEdit widgets for the meeting start & end times. */
	GtkWidget *start_date_edit;
	GtkWidget *end_date_edit;

	/* Colors. */
	GdkColor bg_color;
	GdkColor all_attendees_bg_color;
	GdkColor meeting_time_bg_color;
	GdkColor stipple_bg_color;
	GdkColor attendee_list_bg_color;
	GdkColor grid_color;
	GdkColor grid_shadow_color;
	GdkColor grid_unused_color;
	GdkColor busy_colors[E_MEETING_FREE_BUSY_LAST];

	/* The stipple used for attendees with no data. */
	GdkPixmap *stipple;

	/* GC for drawing the color key. */
	GdkGC *color_key_gc;

	/* Width of the hours strings (e.g. "1:00") in the current font. */
	gint hour_widths[24];

	/* Whether we are using the full, abbreviated or short date format. */
	EMeetingTimeSelectorDateFormat date_format;

	/*
	 * Option Settings.
	 */

	/* True if we are selecting all day events */
	gboolean all_day;
	
	/* If this is TRUE we only show hours between day_start_hour and
	   day_end_hour, defaults to TRUE (9am-6pm). */
	gboolean working_hours_only;
	gint day_start_hour;
	gint day_start_minute;
	gint day_end_hour;
	gint day_end_minute;

	/* If TRUE, view is compressed, with one cell for every 3 hours rather
	   than every hour. Defaults to FALSE. */
	gboolean zoomed_out;


	/*
	 * Internal Data.
	 */

	/* These are the first & last dates shown in the current scroll area.
	   We show E_MEETING_TIME_SELECTOR_DAYS_SHOWN days at a time. */
	GDate first_date_shown;
	GDate last_date_shown;

	/* This is the current selection of the meeting time. */
	EMeetingTime meeting_start_time;
	EMeetingTime meeting_end_time;

	/* These are the x pixel coordinates in the entire scroll region of
	   the start and end times. Set to meeting_positions_valid to FALSE to
	   invalidate. They will then be recomputed when needed. Always access
	   with e_meeting_time_selector_get_meeting_time_positions(). */
	gint meeting_positions_valid;
	gint meeting_positions_in_scroll_area;
	gint meeting_start_x;
	gint meeting_end_x;

	/* These are the width and height of the cells, including the grid
	   lines which are displayed on the right and top or bottom of cells.*/
	gint row_height;
	gint col_width;

	/* This is the width of a day in the display, which depends on
	   col_width, working_hours_only and zoomed_out. */
	gint day_width;

	/* These are the first and last hour of each day we display, depending
	   on working_hours_only and zoomed_out. */
	gint first_hour_shown;
	gint last_hour_shown;

	/* The id of the source function for auto-scroll timeouts. */
	guint auto_scroll_timeout_id;

	/* This specifies if we are dragging one of the vertical bars around
	   the meeting time. */
	EMeetingTimeSelectorPosition dragging_position;

	/* The last x coordinate of the mouse, relative to either the left or
	   right edge of the canvas. Used in the auto_scroll_timeout function
	   to determine which way to scroll and how fast. */
	gint last_drag_x;

	/* This is used to determine the delay between scrolls. */
	gint scroll_count;
};


struct _EMeetingTimeSelectorClass
{
	GtkTableClass parent_class;

	void (* changed) (EMeetingTimeSelector *mts);
};


/*
 * PUBLIC INTERFACE - note that this interface will probably change, when I
 * know where the data is coming from. This is mainly just for testing for now.
 */

GtkType e_meeting_time_selector_get_type (void);
GtkWidget* e_meeting_time_selector_new (EMeetingStore *ems);
void e_meeting_time_selector_construct (EMeetingTimeSelector * mts, EMeetingStore *ems);

/* This returns the currently selected meeting time.
   Note that months are 1-12 and days are 1-31. The start time is guaranteed to
   be before or equal to the end time. You may want to check if they are equal
   if that if it is a problem. */
void e_meeting_time_selector_get_meeting_time (EMeetingTimeSelector *mts,
					       gint *start_year,
					       gint *start_month,
					       gint *start_day,
					       gint *start_hour,
					       gint *start_minute,
					       gint *end_year,
					       gint *end_month,
					       gint *end_day,
					       gint *end_hour,
					       gint *end_minute);

/* This sets the meeting time, returning TRUE if it is valid. */
gboolean e_meeting_time_selector_set_meeting_time (EMeetingTimeSelector *mts,
						   gint start_year,
						   gint start_month,
						   gint start_day,
						   gint start_hour,
						   gint start_minute,
						   gint end_year,
						   gint end_month,
						   gint end_day,
						   gint end_hour,
						   gint end_minute);

void e_meeting_time_selector_set_all_day (EMeetingTimeSelector *mts,
					  gboolean all_day);
void e_meeting_time_selector_set_working_hours_only (EMeetingTimeSelector *mts,
						     gboolean working_hours_only);
void e_meeting_time_selector_set_working_hours (EMeetingTimeSelector *mts,
						gint day_start_hour,
						gint day_start_minute,
						gint day_end_hour,
						gint day_end_minute);

void e_meeting_time_selector_set_zoomed_out (EMeetingTimeSelector *mts,
					     gboolean zoomed_out);

EMeetingTimeSelectorAutopickOption e_meeting_time_selector_get_autopick_option (EMeetingTimeSelector *mts);
void e_meeting_time_selector_set_autopick_option (EMeetingTimeSelector *mts,
						  EMeetingTimeSelectorAutopickOption autopick_option);

void e_meeting_time_selector_attendee_set_send_meeting_to (EMeetingTimeSelector *mts,
							   gint row,
							   gboolean send_meeting_to);

/* Clears all busy times for the given attendee. */
void e_meeting_time_selector_attendee_clear_busy_periods (EMeetingTimeSelector *mts,
							  gint row);
/* Adds one busy time for the given attendee. */
gboolean e_meeting_time_selector_attendee_add_busy_period (EMeetingTimeSelector *mts,
							   gint row,
							   gint start_year,
							   gint start_month,
							   gint start_day,
							   gint start_hour,
							   gint start_minute,
							   gint end_year,
							   gint end_month,
							   gint end_day,
							   gint end_hour,
							   gint end_minute,
							   EMeetingFreeBusyType busy_type);



/*
 * INTERNAL ROUTINES - functions to communicate with the canvas items within
 *		       the EMeetingTimeSelector.
 */

/* This returns the x pixel coordinates of the meeting start and end times,
   in the entire canvas scroll area. If it returns FALSE, then the meeting
   time isn't in the current scroll area (which shouldn't really happen). */
gboolean e_meeting_time_selector_get_meeting_time_positions (EMeetingTimeSelector *mts,
							     gint *start_x,
							     gint *end_x);

void e_meeting_time_selector_drag_meeting_time (EMeetingTimeSelector *mts,
						gint x);

void e_meeting_time_selector_remove_timeout (EMeetingTimeSelector *mts);

void e_meeting_time_selector_fix_time_overflows (EMeetingTime*mtstime);

void e_meeting_time_selector_calculate_day_and_position (EMeetingTimeSelector *mts,
							 gint x,
							 GDate *date,
							 gint *day_position);
void e_meeting_time_selector_convert_day_position_to_hours_and_mins (EMeetingTimeSelector *mts, gint day_position, guint8 *hours, guint8 *minutes);
void e_meeting_time_selector_calculate_time (EMeetingTimeSelector *mts,
					     gint x,
					     EMeetingTime*time);
gint e_meeting_time_selector_calculate_time_position (EMeetingTimeSelector *mts,
						      EMeetingTime *mtstime);

/* Debugging function to dump information on all attendees. */
#ifdef E_MEETING_TIME_SELECTOR_DEBUG
void e_meeting_time_selector_dump (EMeetingTimeSelector *mts);
gchar* e_meeting_time_selector_dump_time (EMeetingTime*mtstime);
gchar* e_meeting_time_selector_dump_date (GDate *date);
#endif /* E_MEETING_TIME_SELECTOR_DEBUG */

G_END_DECLS

#endif /* _E_MEETING_TIME_SELECTOR_H_ */
