src/calendar/gui/ea-calendar-helpers.c

   1 /*
   2  *
   3  * This program is free software; you can redistribute it and/or modify it
   4  * under the terms of the GNU Lesser General Public License as published by
   5  * the Free Software Foundation.
   6  *
   7  * This program is distributed in the hope that it will be useful, but
   8  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   9  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  10  * for more details.
  11  *
  12  * You should have received a copy of the GNU Lesser General Public License
  13  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  14  *
  15  *
  16  * Authors:
  17  *              Bolian Yin <bolian.yin@sun.com>
  18  *
  19  * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
  20  *
  21  */
  22
  23 #include "evolution-config.h"
  24
  25 #include "ea-calendar-helpers.h"
  26 #include "ea-cal-view-event.h"
  27 #include "ea-jump-button.h"
  28 #include "e-day-view.h"
  29 #include "e-week-view.h"
  30
  31 #include <libgnomecanvas/libgnomecanvas.h>
  32
  33 /**
  34  * ea_calendar_helpers_get_accessible_for
  35  * @canvas_item: the canvas item for a event or a jump button
  36  *
  37  * Returns: the atk object for the canvas_item
  38  **/
  39 AtkObject *
  40 ea_calendar_helpers_get_accessible_for (GnomeCanvasItem *canvas_item)
  41 {
  42         AtkObject *atk_obj = NULL;
  43         GObject *g_obj;
  44
  45         g_return_val_if_fail ((E_IS_TEXT (canvas_item)) ||
  46                 (GNOME_IS_CANVAS_ITEM (canvas_item)), NULL);
  47
  48         g_obj = G_OBJECT (canvas_item);
  49         /* we cannot use atk_gobject_accessible_for_object here,
  50          * EaDayViewEvent/EaWeekViewEvent cannot be created by the
  51          * registered facotry of E_TEXT
  52          */
  53         atk_obj = g_object_get_data (g_obj, "accessible-object");
  54         if (!atk_obj) {
  55                 if (E_IS_TEXT (canvas_item)) {
  56                 atk_obj = ea_cal_view_event_new (g_obj);
  57                 }
  58                 else if (GNOME_IS_CANVAS_PIXBUF (canvas_item)) {
  59                         atk_obj = ea_jump_button_new (g_obj);
  60                 }
  61                 else
  62                         return NULL;
  63         }
  64         return atk_obj;
  65 }
  66
  67 /**
  68  * ea_calendar_helpers_get_view_widget_from:
  69  * @canvas_item: the canvas item for a event or a jump button
  70  *
  71  * Get the cal view widget contains the canvas_item.
  72  *
  73  * Returns: the cal view widget if exists
  74  **/
  75 ECalendarView *
  76 ea_calendar_helpers_get_cal_view_from (GnomeCanvasItem *canvas_item)
  77 {
  78         GnomeCanvas *canvas;
  79         GtkWidget *view_widget = NULL;
  80
  81         g_return_val_if_fail (canvas_item, NULL);
  82         g_return_val_if_fail ((E_IS_TEXT (canvas_item)) ||
  83                 (GNOME_IS_CANVAS_ITEM (canvas_item)), NULL);
  84
  85         /* canvas_item is the e_text for the event */
  86         /* canvas_item->canvas is the ECanvas for day view */
  87         /* parent of canvas_item->canvas is the EDayView or EWeekView widget */
  88         canvas = canvas_item->canvas;
  89         view_widget = gtk_widget_get_parent (GTK_WIDGET (canvas));
  90
  91         if (view_widget && GTK_IS_BOX (view_widget))
  92                 view_widget = gtk_widget_get_parent (view_widget);
  93
  94         if (!view_widget || !E_IS_CALENDAR_VIEW (view_widget))
  95                 return NULL;
  96
  97         return E_CALENDAR_VIEW (view_widget);
  98 }
  99
 100 /**
 101  * ea_calendar_helpers_get_cal_view_event_from
 102  * @canvas_item: the cavas_item (e_text) for the event
 103  *
 104  * Get the ECalendarViewEvent for the canvas_item.
 105  *
 106  * Returns: the ECalendarViewEvent
 107  **/
 108 ECalendarViewEvent *
 109 ea_calendar_helpers_get_cal_view_event_from (GnomeCanvasItem *canvas_item)
 110 {
 111         ECalendarView *cal_view;
 112         gboolean event_found;
 113         ECalendarViewEvent *cal_view_event;
 114
 115         g_return_val_if_fail (E_IS_TEXT (canvas_item), NULL);
 116
 117         cal_view = ea_calendar_helpers_get_cal_view_from (canvas_item);
 118
 119         if (!cal_view)
 120                 return NULL;
 121
 122         if (E_IS_DAY_VIEW (cal_view)) {
 123                 gint event_day, event_num;
 124                 EDayViewEvent *day_view_event;
 125                 EDayView *day_view = E_DAY_VIEW (cal_view);
 126                 event_found = e_day_view_find_event_from_item (
 127                         day_view, canvas_item,
 128                         &event_day, &event_num);
 129                 if (!event_found)
 130                         return NULL;
 131                 if (event_day == E_DAY_VIEW_LONG_EVENT) {
 132                         /* a long event */
 133                         day_view_event = &g_array_index (day_view->long_events,
 134                                                          EDayViewEvent, event_num);
 135                 }
 136                 else {
 137                         /* a main canvas event */
 138                         day_view_event = &g_array_index (day_view->events[event_day],
 139                                                          EDayViewEvent, event_num);
 140                 }
 141                 cal_view_event = (ECalendarViewEvent *) day_view_event;
 142         }
 143         else if (E_IS_WEEK_VIEW (cal_view)) {
 144                 gint event_num, span_num;
 145                 EWeekViewEvent *week_view_event;
 146                 EWeekView *week_view = E_WEEK_VIEW (cal_view);
 147                 event_found = e_week_view_find_event_from_item (
 148                         week_view,
 149                         canvas_item,
 150                         &event_num,
 151                         &span_num);
 152                 if (!event_found)
 153                         return NULL;
 154
 155                 week_view_event = &g_array_index (
 156                         week_view->events, EWeekViewEvent, event_num);
 157
 158                 cal_view_event = (ECalendarViewEvent *) week_view_event;
 159         }
 160         else {
 161                 g_return_val_if_reached (NULL);
 162         }
 163         return cal_view_event;
 164 }