src/calendar/gui/e-week-view-main-item.c

   1 /*
   2  * EWeekViewMainItem - displays the background grid and dates for the Week and
   3  * Month calendar views.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU Lesser General Public License as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public License
  15  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  *
  17  * Authors:
  18  *              Damon Chaplin <damon@ximian.com>
  19  *
  20  * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
  21  */
  22
  23 #include "evolution-config.h"
  24
  25 #include <string.h>
  26 #include <glib/gi18n.h>
  27
  28 #include "e-week-view-main-item.h"
  29 #include "ea-calendar.h"
  30 #include "calendar-config.h"
  31
  32 #define E_WEEK_VIEW_MAIN_ITEM_GET_PRIVATE(obj) \
  33         (G_TYPE_INSTANCE_GET_PRIVATE \
  34         ((obj), E_TYPE_WEEK_VIEW_MAIN_ITEM, EWeekViewMainItemPrivate))
  35
  36 struct _EWeekViewMainItemPrivate {
  37         EWeekView *week_view;
  38 };
  39
  40 enum {
  41         PROP_0,
  42         PROP_WEEK_VIEW
  43 };
  44
  45 G_DEFINE_TYPE (
  46         EWeekViewMainItem,
  47         e_week_view_main_item,
  48         GNOME_TYPE_CANVAS_ITEM)
  49
  50 static void
  51 week_view_main_item_draw_day (EWeekViewMainItem *main_item,
  52                               gint day,
  53                               GDate *date,
  54                               cairo_t *cr,
  55                               gint x,
  56                               gint y,
  57                               gint width,
  58                               gint height)
  59 {
  60         EWeekView *week_view;
  61         ECalModel *model;
  62         gint right_edge, bottom_edge, date_width, date_x, line_y;
  63         gboolean show_day_name, show_month_name, selected;
  64         gchar buffer[128], *format_string;
  65         gint month, day_of_month, max_width;
  66         GDateWeekday weekday;
  67         GdkColor *bg_color;
  68         PangoFontDescription *font_desc;
  69         PangoContext *pango_context;
  70         PangoFontMetrics *font_metrics;
  71         PangoLayout *layout;
  72         gboolean today = FALSE;
  73         gboolean multi_week_view;
  74
  75         week_view = e_week_view_main_item_get_week_view (main_item);
  76         model = e_calendar_view_get_model (E_CALENDAR_VIEW (week_view));
  77
  78         multi_week_view = e_week_view_get_multi_week_view (week_view);
  79
  80         /* Set up Pango prerequisites */
  81         pango_context = gtk_widget_get_pango_context (GTK_WIDGET (week_view));
  82         font_desc = pango_font_description_copy (pango_context_get_font_description (pango_context));
  83         font_metrics = pango_context_get_metrics (
  84                 pango_context, font_desc,
  85                 pango_context_get_language (pango_context));
  86
  87         month = g_date_get_month (date);
  88         weekday = g_date_get_weekday (date);
  89         day_of_month = g_date_get_day (date);
  90         line_y = y + E_WEEK_VIEW_DATE_T_PAD +
  91                 PANGO_PIXELS (pango_font_metrics_get_ascent (font_metrics)) +
  92                 PANGO_PIXELS (pango_font_metrics_get_descent (font_metrics)) +
  93                 E_WEEK_VIEW_DATE_LINE_T_PAD;
  94
  95         if (!today) {
  96                 ECalendarView *view;
  97                 struct icaltimetype tt;
  98                 const icaltimezone *zone;
  99
 100                 view = E_CALENDAR_VIEW (week_view);
 101                 zone = e_calendar_view_get_timezone (view);
 102
 103                 /* Check if we are drawing today */
 104                 tt = icaltime_from_timet_with_zone (
 105                         time (NULL), FALSE, zone);
 106                 today = g_date_get_year (date) == tt.year
 107                         && g_date_get_month (date) == tt.month
 108                         && g_date_get_day (date) == tt.day;
 109         }
 110
 111         /* Draw the background of the day. In the month view odd months are
 112          * one color and even months another, so you can easily see when each
 113          * month starts (defaults are white for odd - January, March, ... and
 114          * light gray for even). In the week view the background is always the
 115          * same color, the color used for the odd months in the month view. */
 116         if (today)
 117                 bg_color = &week_view->colors[E_WEEK_VIEW_COLOR_TODAY_BACKGROUND];
 118         else if (!e_cal_model_get_work_day (model, weekday))
 119                 bg_color = &week_view->colors[E_WEEK_VIEW_COLOR_MONTH_NONWORKING_DAY];
 120         else if (multi_week_view && (month % 2 == 0))
 121                 bg_color = &week_view->colors[E_WEEK_VIEW_COLOR_EVEN_MONTHS];
 122         else
 123                 bg_color = &week_view->colors[E_WEEK_VIEW_COLOR_ODD_MONTHS];
 124
 125         cairo_save (cr);
 126         gdk_cairo_set_source_color (cr, bg_color);
 127         cairo_rectangle (cr, x, y, width, height);
 128         cairo_fill (cr);
 129         cairo_restore (cr);
 130
 131         /* Draw the lines on the right and bottom of the cell. The canvas is
 132          * sized so that the lines on the right & bottom edges will be off the
 133          * edge of the canvas, so we don't have to worry about them. */
 134         right_edge = x + width - 1;
 135         bottom_edge = y + height - 1;
 136
 137         cairo_save (cr);
 138         gdk_cairo_set_source_color (cr,  &week_view->colors[E_WEEK_VIEW_COLOR_GRID]);
 139         cairo_set_line_width (cr, 0.5);
 140         cairo_move_to (cr, right_edge + 0.5, y);
 141         cairo_line_to (cr, right_edge + 0.5, bottom_edge);
 142         cairo_move_to (cr, x, bottom_edge + 0.5);
 143         cairo_line_to (cr, right_edge, bottom_edge + 0.5);
 144         cairo_stroke (cr);
 145         cairo_restore (cr);
 146
 147         /* If the day is selected, draw the blue background. */
 148         cairo_save (cr);
 149         selected = TRUE;
 150         if (week_view->selection_start_day == -1
 151             || week_view->selection_start_day > day
 152             || week_view->selection_end_day < day)
 153                 selected = FALSE;
 154         if (selected) {
 155                 if (gtk_widget_has_focus (GTK_WIDGET (week_view))) {
 156                         gdk_cairo_set_source_color (
 157                                 cr, &week_view->colors[E_WEEK_VIEW_COLOR_SELECTED]);
 158                 } else {
 159                         gdk_cairo_set_source_color (
 160                                 cr, &week_view->colors[E_WEEK_VIEW_COLOR_SELECTED_UNFOCUSSED]);
 161                 }
 162
 163                 if (multi_week_view) {
 164                         cairo_rectangle (
 165                                 cr, x + 2, y + 1,
 166                                 width - 5,
 167                                 E_WEEK_VIEW_DATE_T_PAD - 1 +
 168                                 PANGO_PIXELS (pango_font_metrics_get_ascent (font_metrics)) +
 169                                 PANGO_PIXELS (pango_font_metrics_get_descent (font_metrics)));
 170                         cairo_fill (cr);
 171                 } else {
 172                         cairo_rectangle (
 173                                 cr, x + 2, y + 1,
 174                                 width - 5, line_y - y);
 175                         cairo_fill (cr);
 176                 }
 177         }
 178         cairo_restore (cr);
 179
 180         /* Display the date in the top of the cell.
 181          * In the week view, display the long format "10 January" in all cells,
 182          * or abbreviate it to "10 Jan" or "10" if that doesn't fit.
 183          * In the month view, only use the long format for the first cell and
 184          * the 1st of each month, otherwise use "10". */
 185         show_day_name = FALSE;
 186         show_month_name = FALSE;
 187         if (!multi_week_view) {
 188                 show_day_name = TRUE;
 189                 show_month_name = TRUE;
 190         } else if ((day % 7) == 0 || day_of_month == 1) {
 191                 show_month_name = TRUE;
 192         }
 193
 194         /* Now find the longest form of the date that will fit. */
 195         max_width = width - 4;
 196         format_string = NULL;
 197         if (show_day_name) {
 198                 if (week_view->max_day_width + week_view->digit_width * 2
 199                     + week_view->space_width * 2
 200                     + week_view->month_widths[month - 1] < max_width)
 201                         /* strftime format %A = full weekday name, %d = day of
 202                          * month, %B = full month name. You can change the
 203                          * order but don't change the specifiers or add
 204                          * anything. */
 205                         format_string = _("%A %d %B");
 206                 else if (week_view->max_abbr_day_width
 207                          + week_view->digit_width * 2
 208                          + week_view->space_width * 2
 209                          + week_view->abbr_month_widths[month - 1] < max_width)
 210                         /* strftime format %a = abbreviated weekday name,
 211                          * %d = day of month, %b = abbreviated month name.
 212                          * You can change the order but don't change the
 213                          * specifiers or add anything. */
 214                         format_string = _("%a %d %b");
 215         }
 216         if (!format_string && show_month_name) {
 217                 if (week_view->digit_width * 2 + week_view->space_width
 218                     + week_view->month_widths[month - 1] < max_width)
 219                         /* strftime format %d = day of month, %B = full
 220                          * month name. You can change the order but don't
 221                          * change the specifiers or add anything. */
 222                         format_string = _("%d %B");
 223                 else if (week_view->digit_width * 2 + week_view->space_width
 224                     + week_view->abbr_month_widths[month - 1] < max_width)
 225                         /* strftime format %d = day of month, %b = abbreviated
 226                          * month name. You can change the order but don't
 227                          * change the specifiers or add anything. */
 228                         format_string = _("%d %b");
 229         }
 230
 231         cairo_save (cr);
 232         if (selected) {
 233                 gdk_cairo_set_source_color (
 234                         cr, &week_view->colors[E_WEEK_VIEW_COLOR_DATES_SELECTED]);
 235         } else if (multi_week_view) {
 236                 if (today) {
 237                         gdk_cairo_set_source_color (
 238                                 cr, &week_view->colors[E_WEEK_VIEW_COLOR_TODAY]);
 239                 } else {
 240                         gdk_cairo_set_source_color (
 241                                 cr, &week_view->colors[E_WEEK_VIEW_COLOR_DATES]);
 242                 }
 243         } else {
 244                 gdk_cairo_set_source_color (
 245                         cr, &week_view->colors[E_WEEK_VIEW_COLOR_DATES]);
 246         }
 247
 248         if (today) {
 249                 g_date_strftime (
 250                         buffer, sizeof (buffer),
 251                         format_string ? format_string : "<b>%d</b>", date);
 252                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (week_view), NULL);
 253                 pango_layout_set_text (layout, buffer, -1);
 254                 pango_layout_set_markup (layout, buffer, strlen (buffer));
 255         } else {
 256                 g_date_strftime (
 257                         buffer, sizeof (buffer),
 258                         format_string ? format_string : "%d", date);
 259                 layout = gtk_widget_create_pango_layout (GTK_WIDGET (week_view), NULL);
 260                 pango_layout_set_text (layout, buffer, -1);
 261         }
 262
 263         pango_layout_get_pixel_size (layout, &date_width, NULL);
 264         date_x = x + width - date_width - E_WEEK_VIEW_DATE_R_PAD;
 265         date_x = MAX (date_x, x + 1);
 266
 267         cairo_translate (cr, date_x, y + E_WEEK_VIEW_DATE_T_PAD);
 268         pango_cairo_update_layout (cr, layout);
 269         pango_cairo_show_layout (cr, layout);
 270         cairo_restore (cr);
 271         g_object_unref (layout);
 272
 273         /* Draw the line under the date. */
 274         if (!multi_week_view) {
 275                 cairo_save (cr);
 276                 gdk_cairo_set_source_color (
 277                         cr, &week_view->colors[E_WEEK_VIEW_COLOR_GRID]);
 278                 cairo_set_line_width (cr, 0.7);
 279                 cairo_move_to (cr, x + E_WEEK_VIEW_DATE_LINE_L_PAD, line_y);
 280                 cairo_line_to (cr, right_edge, line_y);
 281                 cairo_stroke (cr);
 282                 cairo_restore (cr);
 283         }
 284         pango_font_metrics_unref (font_metrics);
 285         pango_font_description_free (font_desc);
 286 }
 287
 288 static void
 289 week_view_main_item_set_property (GObject *object,
 290                                   guint property_id,
 291                                   const GValue *value,
 292                                   GParamSpec *pspec)
 293 {
 294         switch (property_id) {
 295                 case PROP_WEEK_VIEW:
 296                         e_week_view_main_item_set_week_view (
 297                                 E_WEEK_VIEW_MAIN_ITEM (object),
 298                                 g_value_get_object (value));
 299                         return;
 300         }
 301
 302         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
 303 }
 304
 305 static void
 306 week_view_main_item_get_property (GObject *object,
 307                                   guint property_id,
 308                                   GValue *value,
 309                                   GParamSpec *pspec)
 310 {
 311         switch (property_id) {
 312                 case PROP_WEEK_VIEW:
 313                         g_value_set_object (
 314                                 value, e_week_view_main_item_get_week_view (
 315                                 E_WEEK_VIEW_MAIN_ITEM (object)));
 316                         return;
 317         }
 318
 319         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
 320 }
 321
 322 static void
 323 week_view_main_item_dispose (GObject *object)
 324 {
 325         EWeekViewMainItemPrivate *priv;
 326
 327         priv = E_WEEK_VIEW_MAIN_ITEM_GET_PRIVATE (object);
 328
 329         if (priv->week_view != NULL) {
 330                 g_object_unref (priv->week_view);
 331                 priv->week_view = NULL;
 332         }
 333
 334         /* Chain up to parent's dispose() method. */
 335         G_OBJECT_CLASS (e_week_view_main_item_parent_class)->dispose (object);
 336 }
 337
 338 static void
 339 week_view_main_item_update (GnomeCanvasItem *item,
 340                             const cairo_matrix_t *i2c,
 341                             gint flags)
 342 {
 343         GnomeCanvasItemClass *canvas_item_class;
 344
 345         /* Chain up to parent's update() method. */
 346         canvas_item_class =
 347                 GNOME_CANVAS_ITEM_CLASS (e_week_view_main_item_parent_class);
 348         canvas_item_class->update (item, i2c, flags);
 349
 350         /* The item covers the entire canvas area. */
 351         item->x1 = 0;
 352         item->y1 = 0;
 353         item->x2 = INT_MAX;
 354         item->y2 = INT_MAX;
 355 }
 356
 357 static void
 358 week_view_main_item_draw (GnomeCanvasItem *canvas_item,
 359                           cairo_t *cr,
 360                           gint x,
 361                           gint y,
 362                           gint width,
 363                           gint height)
 364 {
 365         EWeekViewMainItem *main_item;
 366         EWeekView *week_view;
 367         GDate date;
 368         gint num_days, day, day_x, day_y, day_w, day_h;
 369
 370         main_item = E_WEEK_VIEW_MAIN_ITEM (canvas_item);
 371         week_view = e_week_view_main_item_get_week_view (main_item);
 372         g_return_if_fail (week_view != NULL);
 373
 374         /* Step through each of the days. */
 375         e_week_view_get_first_day_shown (week_view, &date);
 376
 377         /* If no date has been set, we just use Dec 1999/January 2000. */
 378         if (!g_date_valid (&date))
 379                 g_date_set_dmy (&date, 27, 12, 1999);
 380
 381         num_days = e_week_view_get_weeks_shown (week_view) * 7;
 382         for (day = 0; day < num_days; day++) {
 383                 e_week_view_get_day_position (
 384                         week_view, day,
 385                         &day_x, &day_y,
 386                         &day_w, &day_h);
 387                 /* Skip any days which are outside the area. */
 388                 if (day_x < x + width && day_x + day_w >= x
 389                     && day_y < y + height && day_y + day_h >= y) {
 390                         week_view_main_item_draw_day (
 391                                 main_item, day, &date, cr,
 392                                 day_x - x, day_y - y, day_w, day_h);
 393                 }
 394                 g_date_add_days (&date, 1);
 395         }
 396 }
 397
 398 static GnomeCanvasItem *
 399 week_view_main_item_point (GnomeCanvasItem *item,
 400                            gdouble x,
 401                            gdouble y,
 402                            gint cx,
 403                            gint cy)
 404 {
 405         return item;
 406 }
 407
 408 static void
 409 e_week_view_main_item_class_init (EWeekViewMainItemClass *class)
 410 {
 411         GObjectClass  *object_class;
 412         GnomeCanvasItemClass *item_class;
 413
 414         g_type_class_add_private (class, sizeof (EWeekViewMainItemPrivate));
 415
 416         object_class = G_OBJECT_CLASS (class);
 417         object_class->set_property = week_view_main_item_set_property;
 418         object_class->get_property = week_view_main_item_get_property;
 419         object_class->dispose = week_view_main_item_dispose;
 420
 421         item_class = GNOME_CANVAS_ITEM_CLASS (class);
 422         item_class->update = week_view_main_item_update;
 423         item_class->draw = week_view_main_item_draw;
 424         item_class->point = week_view_main_item_point;
 425
 426         g_object_class_install_property (
 427                 object_class,
 428                 PROP_WEEK_VIEW,
 429                 g_param_spec_object (
 430                         "week-view",
 431                         "Week View",
 432                         NULL,
 433                         E_TYPE_WEEK_VIEW,
 434                         G_PARAM_READWRITE));
 435
 436         /* init the accessibility support for e_week_view_main_item */
 437         e_week_view_main_item_a11y_init ();
 438 }
 439
 440 static void
 441 e_week_view_main_item_init (EWeekViewMainItem *main_item)
 442 {
 443         main_item->priv = E_WEEK_VIEW_MAIN_ITEM_GET_PRIVATE (main_item);
 444 }
 445
 446 EWeekView *
 447 e_week_view_main_item_get_week_view (EWeekViewMainItem *main_item)
 448 {
 449         g_return_val_if_fail (E_IS_WEEK_VIEW_MAIN_ITEM (main_item), NULL);
 450
 451         return main_item->priv->week_view;
 452 }
 453
 454 void
 455 e_week_view_main_item_set_week_view (EWeekViewMainItem *main_item,
 456                                      EWeekView *week_view)
 457 {
 458         g_return_if_fail (E_IS_WEEK_VIEW_MAIN_ITEM (main_item));
 459         g_return_if_fail (E_IS_WEEK_VIEW (week_view));
 460
 461         if (main_item->priv->week_view == week_view)
 462                 return;
 463
 464         if (main_item->priv->week_view != NULL)
 465                 g_object_unref (main_item->priv->week_view);
 466
 467         main_item->priv->week_view = g_object_ref (week_view);
 468
 469         g_object_notify (G_OBJECT (main_item), "week-view");
 470 }