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

   1 /*
   2  * EWeekViewTitlesItem - displays the 'Monday', 'Tuesday' etc. at the top of
   3  * the Month calendar view.
   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 <e-util/e-util.h>
  27 #include "e-week-view-titles-item.h"
  28
  29 #define E_WEEK_VIEW_TITLES_ITEM_GET_PRIVATE(obj) \
  30         (G_TYPE_INSTANCE_GET_PRIVATE \
  31         ((obj), E_TYPE_WEEK_VIEW_TITLES_ITEM, EWeekViewTitlesItemPrivate))
  32
  33 struct _EWeekViewTitlesItemPrivate {
  34         EWeekView *week_view;
  35 };
  36
  37 enum {
  38         PROP_0,
  39         PROP_WEEK_VIEW
  40 };
  41
  42 G_DEFINE_TYPE (
  43         EWeekViewTitlesItem,
  44         e_week_view_titles_item,
  45         GNOME_TYPE_CANVAS_ITEM)
  46
  47 static void
  48 week_view_titles_item_set_property (GObject *object,
  49                                     guint property_id,
  50                                     const GValue *value,
  51                                     GParamSpec *pspec)
  52 {
  53         switch (property_id) {
  54                 case PROP_WEEK_VIEW:
  55                         e_week_view_titles_item_set_week_view (
  56                                 E_WEEK_VIEW_TITLES_ITEM (object),
  57                                 g_value_get_object (value));
  58                         return;
  59         }
  60
  61         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
  62 }
  63
  64 static void
  65 week_view_titles_item_get_property (GObject *object,
  66                                     guint property_id,
  67                                     GValue *value,
  68                                     GParamSpec *pspec)
  69 {
  70         switch (property_id) {
  71                 case PROP_WEEK_VIEW:
  72                         g_value_set_object (
  73                                 value,
  74                                 e_week_view_titles_item_get_week_view (
  75                                 E_WEEK_VIEW_TITLES_ITEM (object)));
  76                         return;
  77         }
  78
  79         G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
  80 }
  81
  82 static void
  83 week_view_titles_item_dispose (GObject *object)
  84 {
  85         EWeekViewTitlesItemPrivate *priv;
  86
  87         priv = E_WEEK_VIEW_TITLES_ITEM_GET_PRIVATE (object);
  88
  89         if (priv->week_view != NULL) {
  90                 g_object_unref (priv->week_view);
  91                 priv->week_view = NULL;
  92         }
  93
  94         /* Chain up to parent's dispose() method. */
  95         G_OBJECT_CLASS (e_week_view_titles_item_parent_class)->dispose (object);
  96 }
  97
  98 static void
  99 week_view_titles_item_update (GnomeCanvasItem *item,
 100                               const cairo_matrix_t *i2c,
 101                               gint flags)
 102 {
 103         GnomeCanvasItemClass *canvas_item_class;
 104
 105         /* Chain up to parent's update() method. */
 106         canvas_item_class =
 107                 GNOME_CANVAS_ITEM_CLASS (e_week_view_titles_item_parent_class);
 108         canvas_item_class->update (item, i2c, flags);
 109
 110         /* The item covers the entire canvas area. */
 111         item->x1 = 0;
 112         item->y1 = 0;
 113         item->x2 = INT_MAX;
 114         item->y2 = INT_MAX;
 115 }
 116
 117 static void
 118 week_view_titles_item_draw (GnomeCanvasItem *canvas_item,
 119                             cairo_t *cr,
 120                             gint x,
 121                             gint y,
 122                             gint width,
 123                             gint height)
 124 {
 125         EWeekViewTitlesItem *titles_item;
 126         EWeekView *week_view;
 127         GdkRGBA bg_bg, light_bg, dark_bg;
 128         gint col_width, col, date_width, date_x;
 129         gchar buffer[128];
 130         GtkAllocation allocation;
 131         gboolean abbreviated;
 132         gboolean compress_weekend;
 133         GDateWeekday weekday;
 134         PangoLayout *layout;
 135
 136         titles_item = E_WEEK_VIEW_TITLES_ITEM (canvas_item);
 137         week_view = e_week_view_titles_item_get_week_view (titles_item);
 138         g_return_if_fail (week_view != NULL);
 139
 140         compress_weekend = e_week_view_get_compress_weekend (week_view);
 141
 142         cairo_save (cr);
 143         cairo_set_line_width (cr, 1.0);
 144
 145         gtk_widget_get_allocation (
 146                 GTK_WIDGET (canvas_item->canvas), &allocation);
 147
 148         e_utils_get_theme_color (GTK_WIDGET (week_view), "theme_bg_color", E_UTILS_DEFAULT_THEME_BG_COLOR, &bg_bg);
 149         e_utils_shade_color (&bg_bg, &dark_bg, E_UTILS_DARKNESS_MULT);
 150         e_utils_shade_color (&bg_bg, &light_bg, E_UTILS_LIGHTNESS_MULT);
 151
 152         layout = gtk_widget_create_pango_layout (GTK_WIDGET (week_view), NULL);
 153
 154         /* Draw the shadow around the dates. */
 155         gdk_cairo_set_source_rgba (cr, &light_bg);
 156         cairo_move_to (cr, 1.5 - x, 1.5 - y);
 157         cairo_rel_line_to (cr, allocation.width - 1, 0);
 158         cairo_move_to (cr, 1.5 - x, 2.5 - y);
 159         cairo_rel_line_to (cr, 0, allocation.height - 1);
 160         cairo_stroke (cr);
 161
 162         gdk_cairo_set_source_rgba (cr, &dark_bg);
 163         cairo_rectangle (cr, 0.5 - x, 0.5 - y, allocation.width - 1, allocation.height);
 164         cairo_stroke (cr);
 165
 166         /* Determine the format to use. */
 167         col_width = allocation.width / week_view->columns;
 168         abbreviated = (week_view->max_day_width + 2 >= col_width);
 169
 170         /* Shift right one pixel to account for the shadow around the main
 171          * canvas. */
 172         x--;
 173
 174         /* Draw the date. Set a clipping rectangle so we don't draw over the
 175          * next day. */
 176         weekday = e_week_view_get_display_start_day (week_view);
 177         for (col = 0; col < week_view->columns; col++) {
 178                 if (weekday == G_DATE_SATURDAY && compress_weekend)
 179                         g_snprintf (
 180                                 buffer, sizeof (buffer), "%s/%s",
 181                                 e_get_weekday_name (G_DATE_SATURDAY, TRUE),
 182                                 e_get_weekday_name (G_DATE_SUNDAY, TRUE));
 183                 else
 184                         g_snprintf (
 185                                 buffer, sizeof (buffer), "%s",
 186                                 e_get_weekday_name (weekday, abbreviated));
 187
 188                 cairo_save (cr);
 189
 190                 cairo_rectangle (
 191                         cr,
 192                         week_view->col_offsets[col] - x, 2 - y,
 193                         week_view->col_widths[col], allocation.height - 2);
 194                 cairo_clip (cr);
 195
 196                 if (weekday == G_DATE_SATURDAY && compress_weekend)
 197                         date_width = week_view->abbr_day_widths[5]
 198                                 + week_view->slash_width
 199                                 + week_view->abbr_day_widths[6];
 200                 else if (abbreviated)
 201                         date_width = week_view->abbr_day_widths[weekday];
 202                 else
 203                         date_width = week_view->day_widths[weekday];
 204
 205                 date_x = week_view->col_offsets[col]
 206                         + (week_view->col_widths[col] - date_width) / 2;
 207                 date_x = MAX (date_x, week_view->col_offsets[col]);
 208
 209                 pango_layout_set_text (layout, buffer, -1);
 210                 cairo_move_to (cr, date_x - x, 3 - y);
 211                 pango_cairo_show_layout (cr, layout);
 212
 213                 cairo_restore (cr);
 214
 215                 /* Draw the lines down the left and right of the date cols. */
 216                 if (col != 0) {
 217                         gdk_cairo_set_source_rgba (cr, &light_bg);
 218                         cairo_move_to (cr, week_view->col_offsets[col] - x + 0.5, 4.5 - y);
 219                         cairo_rel_line_to (cr, 0, allocation.height - 8);
 220                         cairo_stroke (cr);
 221
 222                         gdk_cairo_set_source_rgba (cr, &dark_bg);
 223                         cairo_move_to (cr, week_view->col_offsets[col] - x - 0.5, 4.5 - y);
 224                         cairo_rel_line_to (cr, 0, allocation.height - 8);
 225                         cairo_stroke (cr);
 226                 }
 227
 228                 /* Draw the lines between each column. */
 229                 if (col != 0) {
 230                         cairo_set_source_rgb (cr, 0, 0, 0);
 231                         cairo_rectangle (
 232                                 cr, week_view->col_offsets[col] - x,
 233                                 allocation.height - y, 1, 1);
 234                         cairo_fill (cr);
 235                 }
 236
 237                 weekday = e_weekday_get_next (weekday);
 238                 if (weekday == G_DATE_SUNDAY && compress_weekend)
 239                         weekday = e_weekday_get_next (weekday);
 240         }
 241
 242         g_object_unref (layout);
 243         cairo_restore (cr);
 244 }
 245
 246 static GnomeCanvasItem *
 247 week_view_titles_item_point (GnomeCanvasItem *item,
 248                              gdouble x,
 249                              gdouble y,
 250                              gint cx,
 251                              gint cy)
 252 {
 253         return item;
 254 }
 255
 256 static void
 257 e_week_view_titles_item_class_init (EWeekViewTitlesItemClass *class)
 258 {
 259         GObjectClass  *object_class;
 260         GnomeCanvasItemClass *item_class;
 261
 262         g_type_class_add_private (class, sizeof (EWeekViewTitlesItemPrivate));
 263
 264         object_class = G_OBJECT_CLASS (class);
 265         object_class->set_property = week_view_titles_item_set_property;
 266         object_class->get_property = week_view_titles_item_get_property;
 267         object_class->dispose = week_view_titles_item_dispose;
 268
 269         item_class = GNOME_CANVAS_ITEM_CLASS (class);
 270         item_class->update = week_view_titles_item_update;
 271         item_class->draw = week_view_titles_item_draw;
 272         item_class->point = week_view_titles_item_point;
 273
 274         g_object_class_install_property (
 275                 object_class,
 276                 PROP_WEEK_VIEW,
 277                 g_param_spec_object (
 278                         "week-view",
 279                         "Week View",
 280                         NULL,
 281                         E_TYPE_WEEK_VIEW,
 282                         G_PARAM_READWRITE));
 283 }
 284
 285 static void
 286 e_week_view_titles_item_init (EWeekViewTitlesItem *titles_item)
 287 {
 288         titles_item->priv = E_WEEK_VIEW_TITLES_ITEM_GET_PRIVATE (titles_item);
 289 }
 290
 291 EWeekView *
 292 e_week_view_titles_item_get_week_view (EWeekViewTitlesItem *titles_item)
 293 {
 294         g_return_val_if_fail (E_IS_WEEK_VIEW_TITLES_ITEM (titles_item), NULL);
 295
 296         return titles_item->priv->week_view;
 297 }
 298
 299 void
 300 e_week_view_titles_item_set_week_view (EWeekViewTitlesItem *titles_item,
 301                                        EWeekView *week_view)
 302 {
 303         g_return_if_fail (E_IS_WEEK_VIEW_TITLES_ITEM (titles_item));
 304         g_return_if_fail (E_IS_WEEK_VIEW (week_view));
 305
 306         if (titles_item->priv->week_view == week_view)
 307                 return;
 308
 309         if (titles_item->priv->week_view != NULL)
 310                 g_object_unref (titles_item->priv->week_view);
 311
 312         titles_item->priv->week_view = g_object_ref (week_view);
 313
 314         g_object_notify (G_OBJECT (titles_item), "week-view");
 315 }