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
|
#include <stdlib.h>
#include <math.h>
#include <clutter/clutter.h>
#include "clutter-cairo.h"
void
drawClock(cairo_t * cr)
{
/* clock drawing code from http://www.cairographics.org/SDLCLock */
/* store the current time */
time_t rawtime;
struct tm *timeinfo;
double minutes, hours, seconds;
time(&rawtime);
/* In newer versions of Visual Studio localtime(..) is deprecated. */
/* Use localtime_s instead. See MSDN. */
timeinfo = localtime (&rawtime);
/* compute the angles for the indicators of our clock */
minutes = timeinfo->tm_min * G_PI / 30;
hours = timeinfo->tm_hour * G_PI / 6;
seconds = timeinfo->tm_sec * G_PI / 30;
/* Clear our surface */
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint(cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
/* who doesn't want all those nice line settings :) */
cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND);
cairo_set_line_width(cr, 0.1);
/* translate to the center of the rendering context and draw a black */
/* clock outline */
cairo_set_source_rgba(cr, 0, 0, 0, 1);
cairo_translate(cr, 0.5, 0.5);
cairo_arc(cr, 0, 0, 0.4, 0, G_PI * 2);
cairo_stroke(cr);
/* draw a white dot on the current second. */
cairo_set_source_rgba(cr, 1, 1, 1, 0.6);
cairo_arc(cr, sin(seconds) * 0.4, -cos(seconds) * 0.4, 0.05, 0,
G_PI * 2);
cairo_fill(cr);
/* draw the minutes indicator */
cairo_set_source_rgba(cr, 0.2, 0.2, 1, 0.6);
cairo_move_to(cr, 0, 0);
cairo_line_to(cr, sin(minutes) * 0.4, -cos(minutes) * 0.4);
cairo_stroke(cr);
/* draw the hours indicator */
cairo_move_to(cr, 0, 0);
cairo_line_to(cr, sin(hours) * 0.2, -cos(hours) * 0.2);
cairo_stroke(cr);
}
gboolean
tick (gpointer data)
{
ClutterActor *actor = data;
ClutterActor *stage;
cairo_t *cr;
stage = clutter_stage_get_default ();
cr = clutter_cairo_create (CLUTTER_CAIRO (actor));
cairo_scale (cr,
clutter_actor_get_width (actor),
clutter_actor_get_height (actor));
drawClock (cr);
cairo_destroy (cr);
return TRUE;
}
int
main (int argc, char **argv)
{
ClutterActor *ctex, *stage;
ClutterColor stage_color = { 0x99, 0xcc, 0xff, 0xff };
clutter_init (&argc, &argv);
stage = clutter_stage_get_default ();
g_signal_connect (stage, "button-press-event",
G_CALLBACK (clutter_main_quit),
NULL);
clutter_stage_set_color (CLUTTER_STAGE (stage),
&stage_color);
ctex = clutter_cairo_new (300, 300);
clutter_actor_set_position (ctex,
(clutter_actor_get_width (stage) -
clutter_actor_get_width (ctex)) / 2,
(clutter_actor_get_height (stage) -
clutter_actor_get_height (ctex)) / 2);
clutter_container_add (CLUTTER_CONTAINER (stage), ctex, NULL);
tick (ctex);
g_timeout_add_seconds (1, tick, ctex);
clutter_actor_show (stage);
clutter_main();
return EXIT_SUCCESS;
}
|
