1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
|
/* Month view display for gncal
*
* Copyright (C) 1998 Red Hat Software, Inc.
*
* Author: Federico Mena <federico@nuclecu.unam.mx>
*/
#include <config.h>
#include <libgnomeui/gnome-canvas-text.h>
#include "layout.h"
#include "month-view.h"
#include "main.h"
#include "mark.h"
#include "timeutil.h"
#define SPACING 4 /* Spacing between title and calendar */
/* This is a child in the month view. Each child has a number of canvas items associated to it --
* it can be more than one box because an event may span several weeks.
*/
struct child {
iCalObject *ico; /* The calendar object this child refers to */
time_t start, end; /* Start and end times for the instance of the event */
int slot_start; /* The first slot this child uses */
int slots_used; /* The number of slots occupied by this child */
GList *segments; /* The list of segments needed to display this child */
};
/* Each child is composed of one or more segments. Each segment can be considered to be
* the entire child clipped to a particular week, as events may span several weeks in the
* month view.
*/
struct segment {
time_t start, end; /* Start/end times for this segment */
GnomeCanvasItem *item; /* Canvas item used to display this segment */
};
static void month_view_class_init (MonthViewClass *class);
static void month_view_init (MonthView *mv);
static void month_view_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void month_view_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static GnomeCanvasClass *parent_class;
GtkType
month_view_get_type (void)
{
static GtkType month_view_type = 0;
if (!month_view_type) {
GtkTypeInfo month_view_info = {
"MonthView",
sizeof (MonthView),
sizeof (MonthViewClass),
(GtkClassInitFunc) month_view_class_init,
(GtkObjectInitFunc) month_view_init,
NULL, /* reserved_1 */
NULL, /* reserved_2 */
(GtkClassInitFunc) NULL
};
month_view_type = gtk_type_unique (gnome_canvas_get_type (), &month_view_info);
}
return month_view_type;
}
static void
month_view_class_init (MonthViewClass *class)
{
GtkWidgetClass *widget_class;
widget_class = (GtkWidgetClass *) class;
parent_class = gtk_type_class (gnome_canvas_get_type ());
widget_class->size_request = month_view_size_request;
widget_class->size_allocate = month_view_size_allocate;
}
static void
month_view_init (MonthView *mv)
{
/* Title */
mv->title = gnome_canvas_item_new (gnome_canvas_root (GNOME_CANVAS (mv)),
gnome_canvas_text_get_type (),
"anchor", GTK_ANCHOR_N,
"font", HEADING_FONT,
"fill_color", "black",
NULL);
/* Month item */
mv->mitem = gnome_month_item_new (gnome_canvas_root (GNOME_CANVAS (mv)));
gnome_canvas_item_set (mv->mitem,
"x", 0.0,
"anchor", GTK_ANCHOR_NW,
"day_anchor", GTK_ANCHOR_NE,
"start_on_monday", week_starts_on_monday,
"heading_padding", 2.0,
"heading_font", BIG_DAY_HEADING_FONT,
"day_font", BIG_NORMAL_DAY_FONT,
NULL);
mv->old_current_index = -1;
}
GtkWidget *
month_view_new (GnomeCalendar *calendar, time_t month)
{
MonthView *mv;
g_return_val_if_fail (calendar != NULL, NULL);
g_return_val_if_fail (GNOME_IS_CALENDAR (calendar), NULL);
mv = gtk_type_new (month_view_get_type ());
mv->calendar = calendar;
month_view_colors_changed (mv);
month_view_set (mv, month);
return GTK_WIDGET (mv);
}
static void
month_view_size_request (GtkWidget *widget, GtkRequisition *requisition)
{
g_return_if_fail (widget != NULL);
g_return_if_fail (IS_MONTH_VIEW (widget));
g_return_if_fail (requisition != NULL);
if (GTK_WIDGET_CLASS (parent_class)->size_request)
(* GTK_WIDGET_CLASS (parent_class)->size_request) (widget, requisition);
requisition->width = 200;
requisition->height = 150;
}
/* Adjusts a single segment from a child */
static void
adjust_segment (MonthView *mv, struct child *child, struct segment *seg)
{
struct tm start, end;
GnomeCanvasItem *start_item, *end_item;
GnomeCanvasItem *item;
int start_day_index, end_day_index;
double ix1, iy1, ix2, iy2;
double ly2;
double width, height;
time_t day_begin, day_end;
double start_factor, end_factor;
double slot_height;
/* Find the days that the segment intersects and get their bounds */
start = *localtime (&seg->start);
end = *localtime (&seg->end);
start_day_index = gnome_month_item_day2index (GNOME_MONTH_ITEM (mv->mitem), start.tm_mday);
g_assert (start_day_index != -1);
end_day_index = gnome_month_item_day2index (GNOME_MONTH_ITEM (mv->mitem), end.tm_mday);
g_assert (end_day_index != -1);
start_item = gnome_month_item_num2child (GNOME_MONTH_ITEM (mv->mitem),
start_day_index + GNOME_MONTH_ITEM_DAY_GROUP);
end_item = gnome_month_item_num2child (GNOME_MONTH_ITEM (mv->mitem),
end_day_index + GNOME_MONTH_ITEM_DAY_GROUP);
gnome_canvas_item_get_bounds (start_item, &ix1, &iy1, NULL, &iy2);
gnome_canvas_item_get_bounds (end_item, NULL, NULL, &ix2, NULL);
/* Get the lower edge of the day label */
item = gnome_month_item_num2child (GNOME_MONTH_ITEM (mv->mitem), start_day_index + GNOME_MONTH_ITEM_DAY_LABEL);
gnome_canvas_item_get_bounds (item, NULL, NULL, NULL, &ly2);
/* Calculate usable space */
iy1 += ly2;
width = ix2 - ix1;
height = iy2 - iy1;
/* Set the segment's item coordinates */
day_begin = time_day_begin (seg->start);
day_end = time_day_end (seg->end);
start_factor = (double) (seg->start - day_begin) / (day_end - day_begin);
end_factor = (double) (seg->end - day_begin) / (day_end - day_begin);
slot_height = height / mv->num_slots;
gnome_canvas_item_set (seg->item,
"x1", ix1 + width * start_factor,
"y1", iy1 + slot_height * child->slot_start,
"x2", ix1 + width * end_factor,
"y2", iy1 + slot_height * (child->slot_start + child->slots_used),
NULL);
}
/* Adjusts the child events of the month view to the appropriate size and position */
static void
adjust_children (MonthView *mv)
{
GList *children;
struct child *child;
GList *segments;
struct segment *seg;
for (children = mv->children; children; children = children->next) {
child = children->data;
for (segments = child->segments; segments; segments = segments->next) {
seg = segments->data;
adjust_segment (mv, child, seg);
}
}
}
static void
month_view_size_allocate (GtkWidget *widget, GtkAllocation *allocation)
{
MonthView *mv;
GdkFont *font;
GtkArg arg;
int y;
g_return_if_fail (widget != NULL);
g_return_if_fail (IS_MONTH_VIEW (widget));
g_return_if_fail (allocation != NULL);
mv = MONTH_VIEW (widget);
if (GTK_WIDGET_CLASS (parent_class)->size_allocate)
(* GTK_WIDGET_CLASS (parent_class)->size_allocate) (widget, allocation);
gnome_canvas_set_scroll_region (GNOME_CANVAS (mv), 0, 0, allocation->width, allocation->height);
/* Adjust items to new size */
arg.name = "font_gdk";
gtk_object_getv (GTK_OBJECT (mv->title), 1, &arg);
font = GTK_VALUE_BOXED (arg);
gnome_canvas_item_set (mv->title,
"x", (double) allocation->width / 2.0,
"y", (double) SPACING,
NULL);
y = font->ascent + font->descent + 2 * SPACING;
gnome_canvas_item_set (mv->mitem,
"y", (double) y,
"width", (double) (allocation->width - 1),
"height", (double) (allocation->height - y - 1),
NULL);
/* Adjust children */
adjust_children (mv);
}
/* Destroys a child structure and its associated canvas items */
static void
child_destroy (MonthView *mv, struct child *child)
{
GList *list;
struct segment *seg;
/* Destroy the segments */
for (list = child->segments; list; list = list->next) {
seg = list->data;
gtk_object_destroy (GTK_OBJECT (seg->item));
g_free (seg);
}
g_list_free (child->segments);
/* Destroy the child */
g_free (child);
}
/* Creates the list of segments that are used to display a child. Each child may have several
* segments, because it may span several weeks in the month view. This function only creates the
* segment structures and the associated canvas items, but it does not set their final position in
* the month view canvas -- that is done by the adjust_children() function.
*/
static void
child_create_segments (MonthView *mv, struct child *child)
{
time_t t;
time_t month_begin, month_end;
time_t week_begin, week_end;
time_t left, right;
struct segment *seg;
/* Get the month's extents */
t = time_from_day (mv->year, mv->month, 1);
month_begin = time_month_begin (t);
month_end = time_month_end (t);
/* Get the first week of the event */
t = MAX (child->start, month_begin);
week_begin = time_week_begin (t);
if (week_starts_on_monday)
time_add_day (week_begin, 1);
week_end = time_add_week (week_begin, 1);
/* Loop until the event ends or the month ends -- the segments list is created in reverse
* order.
*/
do {
seg = g_new (struct segment, 1);
/* Clip the child to this week */
left = MAX (week_begin, month_begin);
right = MIN (week_end, month_end);
seg->start = MAX (child->start, left);
seg->end = MIN (child->end, right);
seg->item = gnome_canvas_item_new (GNOME_CANVAS_GROUP (mv->mitem),
gnome_canvas_rect_get_type (),
"fill_color", color_spec_from_prop (COLOR_PROP_MARK_DAY_BG),
"outline_color", "black",
"width_pixels", 0,
NULL);
child->segments = g_list_prepend (child->segments, seg);
/* Next week */
week_begin = time_add_week (week_begin, 1);
week_end = time_add_week (week_end, 1);
} while ((child->end > week_begin) && (week_begin < month_end));
/* Reverse the list to put it in increasing order */
child->segments = g_list_reverse (child->segments);
}
/* Comparison function used to create the sorted list of children. Sorts first by increasing start
* time and then by decreasing end time, so that "longer" events are first in the list.
*/
static gint
child_compare (gconstpointer a, gconstpointer b)
{
const struct child *ca, *cb;
time_t diff;
ca = a;
cb = b;
diff = ca->start - cb->start;
if (diff == 0)
diff = cb->end - ca->end;
return (diff < 0) ? -1 : ((diff > 0) ? 1 : 0);
}
/* This is the callback function used from the calendar iterator. It adds events to the list of
* children in the month view.
*/
static int
add_event (iCalObject *ico, time_t start, time_t end, void *data)
{
MonthView *mv;
struct child *child;
mv = MONTH_VIEW (data);
child = g_new (struct child, 1);
child->ico = ico;
child->start = start;
child->end = end;
child->segments = NULL;
child_create_segments (mv, child);
/* Add it to the list of children */
mv->children = g_list_insert_sorted (mv->children, child, child_compare);
return TRUE; /* means "we are not yet finished" */
}
/* Time query function for the layout engine */
static void
child_query_func (GList *list, time_t *start, time_t *end)
{
struct child *child;
child = list->data;
*start = child->start;
*end = child->end;
}
/* Uses the generic event layout engine to set the children's layout information */
static void
layout_children (MonthView *mv)
{
GList *list;
struct child *child;
int *allocations;
int *slots;
int i;
layout_events (mv->children, child_query_func, &mv->num_slots, &allocations, &slots);
if (mv->num_slots == 0)
return;
for (list = mv->children, i = 0; list; list = list->next, i++) {
child = list->data;
child->slot_start = allocations[i];
child->slots_used = slots[i];
}
g_free (allocations);
g_free (slots);
}
void
month_view_update (MonthView *mv, iCalObject *object, int flags)
{
GList *list;
time_t t;
time_t month_begin, month_end;
g_return_if_fail (mv != NULL);
g_return_if_fail (IS_MONTH_VIEW (mv));
/* Destroy the old list of children */
for (list = mv->children; list; list = list->next)
child_destroy (mv, list->data);
g_list_free (mv->children);
mv->children = NULL;
/* Create a new list of children and lay them out */
t = time_from_day (mv->year, mv->month, 1);
month_begin = time_month_begin (t);
month_end = time_month_end (t);
calendar_iterate (mv->calendar->cal, month_begin, month_end, add_event, mv);
layout_children (mv);
adjust_children (mv);
}
/* Unmarks the old day that was marked as current and marks the current day if appropriate */
static void
mark_current_day (MonthView *mv)
{
time_t t;
struct tm *tm;
GnomeCanvasItem *item;
/* Unmark the old day */
if (mv->old_current_index != -1) {
item = gnome_month_item_num2child (GNOME_MONTH_ITEM (mv->mitem),
GNOME_MONTH_ITEM_DAY_LABEL + mv->old_current_index);
gnome_canvas_item_set (item,
"fill_color", color_spec_from_prop (COLOR_PROP_DAY_FG),
"font", BIG_NORMAL_DAY_FONT,
NULL);
mv->old_current_index = -1;
}
/* Mark the new day */
t = time (NULL);
tm = localtime (&t);
if (((tm->tm_year + 1900) == mv->year) && (tm->tm_mon == mv->month)) {
mv->old_current_index = gnome_month_item_day2index (GNOME_MONTH_ITEM (mv->mitem), tm->tm_mday);
g_assert (mv->old_current_index != -1);
item = gnome_month_item_num2child (GNOME_MONTH_ITEM (mv->mitem),
GNOME_MONTH_ITEM_DAY_LABEL + mv->old_current_index);
gnome_canvas_item_set (item,
"fill_color", color_spec_from_prop (COLOR_PROP_CURRENT_DAY_FG),
"font", BIG_CURRENT_DAY_FONT,
NULL);
}
}
void
month_view_set (MonthView *mv, time_t month)
{
struct tm *tm;
char buf[100];
g_return_if_fail (mv != NULL);
g_return_if_fail (IS_MONTH_VIEW (mv));
/* Title */
tm = localtime (&month);
mv->year = tm->tm_year + 1900;
mv->month = tm->tm_mon;
strftime (buf, 100, "%B %Y", tm);
gnome_canvas_item_set (mv->title,
"text", buf,
NULL);
/* Month item */
gnome_canvas_item_set (mv->mitem,
"year", mv->year,
"month", mv->month,
NULL);
/* Update events */
month_view_update (mv, NULL, 0);
mark_current_day (mv);
}
void
month_view_time_format_changed (MonthView *mv)
{
g_return_if_fail (mv != NULL);
g_return_if_fail (IS_MONTH_VIEW (mv));
gnome_canvas_item_set (mv->mitem,
"start_on_monday", week_starts_on_monday,
NULL);
month_view_set (mv, time_month_begin (time_from_day (mv->year, mv->month, 1)));
}
void
month_view_colors_changed (MonthView *mv)
{
g_return_if_fail (mv != NULL);
g_return_if_fail (IS_MONTH_VIEW (mv));
colorify_month_item (GNOME_MONTH_ITEM (mv->mitem), default_color_func, NULL);
mark_current_day (mv);
/* FIXME: set children to the marked color */
}
|