path: root/calendar/gui/e-week-view.h

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

/* 
 * Author : 
 *  Damon Chaplin <damon@ximian.com>
 *
 * Copyright 1999, Ximian, Inc.
 * Copyright 2001, 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_WEEK_VIEW_H_
#define _E_WEEK_VIEW_H_

#include <gtk/gtktable.h>
#include <libgnomecanvas/gnome-canvas.h>
#include <gal/widgets/e-popup-menu.h>

#include "e-calendar-view.h"
#include "gnome-cal.h"

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

/*
 * EWeekView - displays the Week & Month views of the calendar.
 */

/* The maximum number of weeks we show. 5 is usually enough for 1 month,
   but we allow 6 for longer selections. */
#define E_WEEK_VIEW_MAX_WEEKS       6

/* The size of the reminder & recurrence icons, and padding around them.
   X_PAD is the padding between icons. R_PAD is the padding on the right of
   the last icon, before the event text. */
#define E_WEEK_VIEW_ICON_WIDTH      16
#define E_WEEK_VIEW_ICON_HEIGHT     16
#define E_WEEK_VIEW_ICON_X_PAD      1
#define E_WEEK_VIEW_ICON_Y_PAD      1
#define E_WEEK_VIEW_ICON_R_PAD      8

/* The space on the left & right outside of the event. (The triangle to
   indicate the event continues is displayed in this space). */
#define E_WEEK_VIEW_EVENT_L_PAD     2
#define E_WEEK_VIEW_EVENT_R_PAD     2

/* The vertical spacing between rows of events. */
#define E_WEEK_VIEW_EVENT_Y_SPACING 1

/* The size of the border around long events. */
#define E_WEEK_VIEW_EVENT_BORDER_WIDTH  1
#define E_WEEK_VIEW_EVENT_BORDER_HEIGHT 1

/* The padding on the top and bottom of the event text. */
#define E_WEEK_VIEW_EVENT_TEXT_Y_PAD    1

/* The space between the start and end times. */
#define E_WEEK_VIEW_EVENT_TIME_SPACING  2

/* The space between the time and the event text or icons. */
#define E_WEEK_VIEW_EVENT_TIME_X_PAD    8

/* The space between the borders of long events and any text of icons. */
#define E_WEEK_VIEW_EVENT_EDGE_X_PAD    2

/* The padding above and on the right of the date string at the top of each
   cell. */
#define E_WEEK_VIEW_DATE_T_PAD      2
#define E_WEEK_VIEW_DATE_R_PAD      4

/* The padding above and below the line under the date string, in the Week
   view, and also the space on the left of it. */
#define E_WEEK_VIEW_DATE_LINE_T_PAD 1
#define E_WEEK_VIEW_DATE_LINE_B_PAD 1
#define E_WEEK_VIEW_DATE_LINE_L_PAD 10

/* The padding below the date string in the Month view. */
#define E_WEEK_VIEW_DATE_B_PAD      1

/* We use a 7-bit field to store row numbers in EWeekViewEventSpan, so the
   maximum number or rows we can allow is 127. It is very unlikely to be
   reached anyway. */
#define E_WEEK_VIEW_MAX_ROWS_PER_CELL   127

/* These index our colors array. */
typedef enum
{
    E_WEEK_VIEW_COLOR_EVEN_MONTHS,
    E_WEEK_VIEW_COLOR_ODD_MONTHS,
    E_WEEK_VIEW_COLOR_EVENT_BACKGROUND,
    E_WEEK_VIEW_COLOR_EVENT_BORDER,
    E_WEEK_VIEW_COLOR_EVENT_TEXT,
    E_WEEK_VIEW_COLOR_GRID,
    E_WEEK_VIEW_COLOR_SELECTED,
    E_WEEK_VIEW_COLOR_SELECTED_UNFOCUSSED,
    E_WEEK_VIEW_COLOR_DATES,
    E_WEEK_VIEW_COLOR_DATES_SELECTED,
    E_WEEK_VIEW_COLOR_TODAY,
    
    E_WEEK_VIEW_COLOR_LAST
} EWeekViewColors;

/* These specify which part of the selection we are dragging, if any. */
typedef enum
{
    E_WEEK_VIEW_DRAG_NONE,
    E_WEEK_VIEW_DRAG_START,
    E_WEEK_VIEW_DRAG_END
} EWeekViewDragPosition;

/* These specify which times are shown for the 1-day events. We use the small
   font for the minutes if it can be loaded and the option is on. */
typedef enum
{
    E_WEEK_VIEW_TIME_NONE,
    E_WEEK_VIEW_TIME_START,
    E_WEEK_VIEW_TIME_BOTH,
    E_WEEK_VIEW_TIME_START_SMALL_MIN,
    E_WEEK_VIEW_TIME_BOTH_SMALL_MIN
} EWeekViewTimeFormat;

typedef struct _EWeekViewEventSpan EWeekViewEventSpan;
struct _EWeekViewEventSpan {
    guint start_day : 6;
    guint num_days : 3;
    guint row : 7;
    GnomeCanvasItem *background_item;
    GnomeCanvasItem *text_item;
};

typedef struct _EWeekViewEvent EWeekViewEvent;
struct _EWeekViewEvent {
    E_CALENDAR_VIEW_EVENT_FIELDS
    gint spans_index;
    guint8 num_spans;
};


#define E_WEEK_VIEW(obj)          GTK_CHECK_CAST (obj, e_week_view_get_type (), EWeekView)
#define E_WEEK_VIEW_CLASS(klass)  GTK_CHECK_CLASS_CAST (klass, e_week_view_get_type (), EWeekViewClass)
#define E_IS_WEEK_VIEW(obj)       GTK_CHECK_TYPE (obj, e_week_view_get_type ())


typedef struct _EWeekView       EWeekView;
typedef struct _EWeekViewClass  EWeekViewClass;

struct _EWeekView
{
    ECalendarView cal_view;

    /* The top canvas where the dates are shown. */
    GtkWidget *titles_canvas;
    GnomeCanvasItem *titles_canvas_item;

    /* The main canvas where the appointments are shown. */
    GtkWidget *main_canvas;
    GnomeCanvasItem *main_canvas_item;

    GnomeCanvasItem *jump_buttons[E_WEEK_VIEW_MAX_WEEKS * 7];
    gint focused_jump_button;

    GtkWidget *vscrollbar;

    /* The query object */
    ECalView *query;

    /* The array of EWeekViewEvent elements. */
    GArray *events;
    gboolean events_sorted;
    gboolean events_need_layout;
    gboolean events_need_reshape;

    /* The ID of the timeout function for doing a new layout. */
    gint layout_timeout_id;

    /* An array of EWeekViewEventSpan elements. Each event has its own
       space within this array, and uses the spans_index and num_spans
       fields of the EWeekViewEvent struct to access it. */
    GArray *spans;

    /* The start of each day displayed. */
    time_t day_starts[E_WEEK_VIEW_MAX_WEEKS * 7 + 1];

    /* The base date, where the adjustment value is 0. */
    GDate base_date;

    /* The first day shown in the view. */
    GDate first_day_shown;

    /* If we are displaying multiple weeks in rows. If this is FALSE only
       one week is shown, with a different layout. */
    gboolean multi_week_view;

    gboolean update_base_date;
    
    /* How many weeks we are showing. This is only relevant if
       display_month is TRUE. */
    gint weeks_shown;

    /* If Sat & Sun are compressed. Only applicable in month view, since
       they are always compressed into 1 cell in the week view. */
    gboolean compress_weekend;

    /* Whether we use show event end times. */
    gboolean show_event_end_times;

    /* The first day of the week, 0 (Monday) to 6 (Sunday). */
    gint week_start_day;

    /* The first day of the week we display, 0 (Monday) to 6 (Sunday).
       This will usually be week_start_day, but if the weekend is
       compressed, and week_start_day is Sunday we have to use Saturday. */
    gint display_start_day;

    /* The vertical offset of the events from the top of the cells. */
    gint events_y_offset;

    /* The height of the events, not including spacing between them. */
    gint row_height;

    /* The number of rows of events in each cell. */
    gint rows_per_cell;
    gint rows_per_compressed_cell;

    /* The number of rows we have used for each day (i.e. each cell) */
    gint rows_per_day[E_WEEK_VIEW_MAX_WEEKS * 7];

    /* If the small font is used for displaying the minutes. */
    gboolean use_small_font;

    /* Small font to display the minutes. */
    PangoFontDescription *small_font_desc;

    /* The widths of various pieces of text, used to determine which of
       several date formats to display, set in e_week_view_style_set(). */
    gint space_width;       /* One space character ' '. */
    gint colon_width;       /* Size of ':' in the font. */
    gint slash_width;       /* Size of '/' in the font. */
    gint digit_width;       /* Size of a '0' digit. */
    gint small_digit_width;     /* Size of a small_font '0' digit. */
    gint day_widths[7];     /* Monday first. */
    gint max_day_width;
    gint abbr_day_widths[7];
    gint max_abbr_day_width;
    gint month_widths[12];
    gint max_month_width;
    gint abbr_month_widths[12];
    gint max_abbr_month_width;

    /* The size of the main grid of days and of the cells. A row
       corresponds to a compressed day, so normal days usually take
       up 2 rows. Note that the offsets arrays have one more element
       than the widths/heights arrays since they also contain the
       right/bottom edge. */
    gint rows;
    gint columns;
    gint col_widths[7];
    gint col_offsets[8];
    gint row_heights[E_WEEK_VIEW_MAX_WEEKS * 2];
    gint row_offsets[E_WEEK_VIEW_MAX_WEEKS * 2 + 1];

    /* This specifies which times we are showing for the events, depending
       on how much room is available. */
    EWeekViewTimeFormat time_format;

    /* The GC used for painting in different colors. */
    GdkGC *main_gc;

    /* The icons. */
    GdkPixbuf *reminder_icon;
    GdkPixbuf *recurrence_icon;
    GdkPixbuf *timezone_icon;

    /* Colors for drawing. */
    GdkColor colors[E_WEEK_VIEW_COLOR_LAST];

    /* The normal & resizing cursors. */
    GdkCursor *normal_cursor;
    GdkCursor *move_cursor;
    GdkCursor *resize_width_cursor;

    /* This remembers the last cursor set on the window. */
    GdkCursor *last_cursor_set;

    /* The currently selected region, in days from the first day shown.
       If selection_start_day is -1 there is no current selection. */
    gint selection_start_day;
    gint selection_end_day;

    /* This specifies which end of the selection is being dragged, or is
       E_WEEK_VIEW_DRAG_NONE if the selection isn't being dragged. */
    EWeekViewDragPosition selection_drag_pos;

    /* This is the event the mouse button was pressed on. If the button
       is released we start editing it, but if the mouse is dragged we set
       this to -1. */
    gint pressed_event_num;
    gint pressed_span_num;

    /* The event span currently being edited. The num is -1 if no event is
       being edited. */
    gint editing_event_num;
    gint editing_span_num;

    /* This is used to remember the last edited event. */
    gchar *last_edited_comp_string;

    /* The event that the context menu is for. */
    gint popup_event_num;

    /* The last mouse position when dragging, in the entire canvas. */
    gint drag_event_x;
    gint drag_event_y;

    /* "am" and "pm" in the current locale, and their widths. */
    gchar *am_string;
    gchar *pm_string;
    gint am_string_width;
    gint pm_string_width;
};

struct _EWeekViewClass
{
    ECalendarViewClass parent_class;
};


GtkType    e_week_view_get_type         (void);
GtkWidget* e_week_view_new          (void);

/* The first day shown. Note that it will be rounded down to the start of a
   week when set. The returned value will be invalid if no date has been set
   yet. */
void       e_week_view_get_first_day_shown  (EWeekView  *week_view,
                         GDate      *date);
void       e_week_view_set_first_day_shown  (EWeekView  *week_view,
                         GDate      *date);

/* The selected time range. The EWeekView will show the corresponding
   month and the days between start_time and end_time will be selected.
   To select a single day, use the same value for start_time & end_time. */
void       e_week_view_set_selected_time_range_visible  (EWeekView  *week_view,
                             time_t      start_time,
                             time_t      end_time);

/* Whether to display 1 week or 1 month (5 weeks). It defaults to 1 week. */
gboolean   e_week_view_get_multi_week_view  (EWeekView  *week_view);
void       e_week_view_set_multi_week_view  (EWeekView  *week_view,
                         gboolean    multi_week_view);

/* Whether to update the base date when the time range changes */
gboolean e_week_view_get_update_base_date (EWeekView *week_view);
void e_week_view_set_update_base_date (EWeekView *week_view, gboolean update_base_date);

/* The number of weeks shown in the multi-week view. */
gint       e_week_view_get_weeks_shown      (EWeekView  *week_view);
void       e_week_view_set_weeks_shown      (EWeekView  *week_view,
                         gint        weeks_shown);

/* Whether the weekend (Sat/Sun) should be compressed into 1 cell in the Month
   view. In the Week view they are always compressed. */
gboolean   e_week_view_get_compress_weekend (EWeekView  *week_view);
void       e_week_view_set_compress_weekend (EWeekView  *week_view,
                         gboolean    compress);

/* Whether we display event end times. */
gboolean   e_week_view_get_show_event_end_times (EWeekView  *week_view);
void       e_week_view_set_show_event_end_times (EWeekView  *week_view,
                         gboolean    show);

/* The first day of the week, 0 (Monday) to 6 (Sunday). */
gint       e_week_view_get_week_start_day   (EWeekView  *week_view);
void       e_week_view_set_week_start_day   (EWeekView  *week_view,
                         gint        week_start_day);

void       e_week_view_delete_occurrence        (EWeekView      *week_view);

/* Returns the number of selected events (0 or 1 at present). */
gint       e_week_view_get_num_events_selected  (EWeekView  *week_view);

/*
 * Internal functions called by the associated canvas items.
 */
void       e_week_view_get_day_position     (EWeekView  *week_view,
                         gint        day,
                         gint       *day_x,
                         gint       *day_y,
                         gint       *day_w,
                         gint       *day_h);
gboolean   e_week_view_get_span_position    (EWeekView  *week_view,
                         gint        event_num,
                         gint        span_num,
                         gint       *span_x,
                         gint       *span_y,
                         gint       *span_w);
gboolean   e_week_view_is_one_day_event     (EWeekView  *week_view,
                         gint        event_num);
gboolean   e_week_view_start_editing_event  (EWeekView  *week_view,
                         gint        event_num,
                         gint        span_num,
                         gchar      *initial_text);
void       e_week_view_stop_editing_event   (EWeekView  *week_view);

void       e_week_view_show_popup_menu      (EWeekView  *week_view,
                         GdkEventButton *event,
                         gint        event_num);

void       e_week_view_convert_time_to_display  (EWeekView  *week_view,
                         gint        hour,
                         gint       *display_hour,
                         gchar         **suffix,
                         gint       *suffix_width);
gint       e_week_view_get_time_string_width    (EWeekView  *week_view);

gint       e_week_view_event_sort_func      (const void *arg1,
                         const void *arg2);

gboolean e_week_view_find_event_from_item (EWeekView      *week_view,
                       GnomeCanvasItem *item,
                       gint       *event_num_return,
                       gint       *span_num_return);

gboolean e_week_view_is_jump_button_visible (EWeekView *week_view,
                         gint day);
void e_week_view_jump_to_button_item (EWeekView *week_view, GnomeCanvasItem *item);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* _E_WEEK_VIEW_H_ */