/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *		Damon Chaplin <damon@gtk.org>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifndef E_MEETING_TIME_SELECTOR_H
#define E_MEETING_TIME_SELECTOR_H

#include <gtk/gtk.h>
#include <libgnomecanvas/libgnomecanvas.h>

#include <e-util/e-util.h>

#include "e-meeting-store.h"
#include "e-meeting-list-view.h"

/*
 * 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.
 */

/* Standard GObject macros */
#define E_TYPE_MEETING_TIME_SELECTOR \
	(e_meeting_time_selector_get_type ())
#define E_MEETING_TIME_SELECTOR(obj) \
	(G_TYPE_CHECK_INSTANCE_CAST \
	((obj), E_TYPE_MEETING_TIME_SELECTOR, EMeetingTimeSelector))
#define E_MEETING_TIME_SELECTOR_CLASS(cls) \
	(G_TYPE_CHECK_CLASS_CAST \
	((cls), E_TYPE_MEETING_TIME_SELECTOR, EMeetingTimeSelectorClass))
#define E_IS_MEETING_TIME_SELECTOR(obj) \
	(G_TYPE_CHECK_INSTANCE_TYPE \
	((obj), E_TYPE_MEETING_TIME_SELECTOR))
#define E_IS_MEETING_TIME_SELECTOR_CLASS(cls) \
	(G_TYPE_CHECK_CLASS_TYPE \
	((cls), E_TYPE_MEETING_TIME_SELECTOR))
#define E_MEETING_TIME_SELECTOR_GET_CLASS(obj) \
	(G_TYPE_INSTANCE_GET_CLASS \
	((obj), E_TYPE_MEETING_TIME_SELECTOR))

/* 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

G_BEGIN_DECLS

/* This is used to specify the format used when displaying the dates.
 * 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_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];

typedef struct _EMeetingTimeSelector EMeetingTimeSelector;
typedef struct _EMeetingTimeSelectorClass EMeetingTimeSelectorClass;
typedef struct _EMeetingTimeSelectorPrivate EMeetingTimeSelectorPrivate;

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

	EMeetingTimeSelectorPrivate *priv;

	/*
	 * 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;
	GnomeCanvasItem *item_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;
	GnomeCanvasItem *item_main;

	/* The 'Add attendees from addressbook' button */
	GtkWidget *add_attendees_button;

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

	/* This is the 'Autopick' button, menu & radio menu items. */
	GtkWidget *autopick_down_button;
	GtkWidget *autopick_button;
	GtkWidget *autopick_up_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 attendee_list_bg_color;
	GdkColor grid_color;
	GdkColor grid_shadow_color;
	GdkColor grid_unused_color;
	GdkColor busy_colors[E_MEETING_FREE_BUSY_LAST];

        /* The pattern used for attendees with no data. */
        cairo_pattern_t *no_info_pattern;

	/* 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;

	/* The notification function id for Free/Busy refreshes */
	gboolean fb_refresh_not;

	GdkCursorType last_cursor_set;

	guint style_change_idle_id;
};

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.
 */

GType		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);
gboolean	e_meeting_time_selector_get_use_24_hour_format
						(EMeetingTimeSelector *mts);
void		e_meeting_time_selector_set_use_24_hour_format
						(EMeetingTimeSelector *mts,
						 gboolean use_24_hour_format);

/* 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);

void		e_meeting_time_selector_set_read_only
						(EMeetingTimeSelector *mts,
						 gboolean read_only);

/* 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);
void		e_meeting_time_selector_refresh_free_busy
						(EMeetingTimeSelector *mts,
						 gint row,
						 gboolean all);

/* 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 */