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

/*
 * 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.
 *
 * 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 Lesser General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 *
 * Authors:
 *      Damon Chaplin <damon@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifndef E_WEEK_VIEW_H
#define E_WEEK_VIEW_H

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

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

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

/* Standard GObject macros */
#define E_TYPE_WEEK_VIEW \
    (e_week_view_get_type ())
#define E_WEEK_VIEW(obj) \
    (G_TYPE_CHECK_INSTANCE_CAST \
    ((obj), E_TYPE_WEEK_VIEW, EWeekView))
#define E_WEEK_VIEW_CLASS(cls) \
    (G_TYPE_CHECK_CLASS_CAST \
    ((cls), E_TYPE_WEEK_VIEW, EWeekViewClass))
#define E_IS_WEEK_VIEW(obj) \
    (G_TYPE_CHECK_INSTANCE_TYPE \
    ((obj), E_TYPE_WEEK_VIEW))
#define E_IS_WEEK_VIEW_CLASS(cls) \
    (G_TYPE_CHECK_CLASS_TYPE \
    ((cls), E_TYPE_WEEK_VIEW))
#define E_WEEK_VIEW_GET_CLASS(obj) \
    (G_TYPE_INSTANCE_GET_CLASS \
    ((obj), E_TYPE_WEEK_VIEW, EWeekViewClass))

/* 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

G_BEGIN_DECLS

/* 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_TODAY_BACKGROUND,
    E_WEEK_VIEW_COLOR_MONTH_NONWORKING_DAY,

    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;
};

typedef struct _EWeekView EWeekView;
typedef struct _EWeekViewClass EWeekViewClass;
typedef struct _EWeekViewPrivate EWeekViewPrivate;

struct _EWeekView {
    ECalendarView parent;
    EWeekViewPrivate *priv;

    /* 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 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;

    /* TRUE when requires scrolling by a week in a multi_week_view */
    gboolean month_scroll_by_week;
    guint scroll_by_week_notif_id;

    /* 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_updated (). */
    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 icons. */
    GdkPixbuf *reminder_icon;
    GdkPixbuf *recurrence_icon;
    GdkPixbuf *attach_icon;
    GdkPixbuf *timezone_icon;
    GdkPixbuf *meeting_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;
    gboolean event_destroyed;

    /* remember last selected interval when click and restore on double click,
     * if we double clicked inside that interval. */
    guint32 bc_event_time;
    time_t before_click_dtstart;
    time_t before_click_dtend;

    gboolean requires_update;
};

struct _EWeekViewClass {
    ECalendarViewClass parent_class;

    void    (*cursor_key_up)        (EWeekView *week_view);
    void    (*cursor_key_down)      (EWeekView *week_view);
    void    (*cursor_key_left)      (EWeekView *week_view);
    void    (*cursor_key_right)     (EWeekView *week_view);
};

GType       e_week_view_get_type        (void);
ECalendarView * e_week_view_new         (ECalModel *model);

/* 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 first day of the week we display. */
GDateWeekday    e_week_view_get_display_start_day
                        (EWeekView *week_view);

/* 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_weekend);

/* 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_event_end_times);

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,
                         GdkEvent *button_event,
                         gint event_num);

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

gint        e_week_view_event_sort_func (gconstpointer arg1,
                         gconstpointer 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);
void        e_week_view_scroll_a_step   (EWeekView *week_view,
                         ECalViewMoveDirection direction);

gboolean    e_week_view_is_editing      (EWeekView *week_view);

G_END_DECLS

#endif /* E_WEEK_VIEW_H */