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
|
#include <stdlib.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <clutter/clutter.h>
static const struct {
ClutterContentGravity gravity;
const char *name;
} gravities[] = {
{ CLUTTER_CONTENT_GRAVITY_TOP_LEFT, "Top Left" },
{ CLUTTER_CONTENT_GRAVITY_TOP, "Top" },
{ CLUTTER_CONTENT_GRAVITY_TOP_RIGHT, "Top Right" },
{ CLUTTER_CONTENT_GRAVITY_LEFT, "Left" },
{ CLUTTER_CONTENT_GRAVITY_CENTER, "Center" },
{ CLUTTER_CONTENT_GRAVITY_RIGHT, "Right" },
{ CLUTTER_CONTENT_GRAVITY_BOTTOM_LEFT, "Bottom Left" },
{ CLUTTER_CONTENT_GRAVITY_BOTTOM, "Bottom" },
{ CLUTTER_CONTENT_GRAVITY_BOTTOM_RIGHT, "Bottom Right" },
{ CLUTTER_CONTENT_GRAVITY_RESIZE_FILL, "Resize Fill" },
{ CLUTTER_CONTENT_GRAVITY_RESIZE_ASPECT, "Resize Aspect" },
};
static int n_gravities = G_N_ELEMENTS (gravities);
static int cur_gravity = 0;
static void
on_tap (ClutterTapAction *action,
ClutterActor *actor,
ClutterText *label)
{
gchar *str;
clutter_actor_save_easing_state (actor);
clutter_actor_set_content_gravity (actor, gravities[cur_gravity].gravity);
clutter_actor_restore_easing_state (actor);
str = g_strconcat ("Content gravity: ", gravities[cur_gravity].name, NULL);
clutter_text_set_text (label, str);
g_free (str);
cur_gravity += 1;
if (cur_gravity >= n_gravities)
cur_gravity = 0;
}
int
main (int argc, char *argv[])
{
ClutterActor *stage, *text;
ClutterContent *image;
ClutterAction *action;
GdkPixbuf *pixbuf;
gchar *str;
if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS)
return EXIT_FAILURE;
stage = clutter_stage_new ();
clutter_actor_set_name (stage, "Stage");
clutter_stage_set_title (CLUTTER_STAGE (stage), "Content Box");
clutter_stage_set_user_resizable (CLUTTER_STAGE (stage), TRUE);
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
clutter_actor_set_margin_top (stage, 12);
clutter_actor_set_margin_right (stage, 12);
clutter_actor_set_margin_bottom (stage, 12);
clutter_actor_set_margin_left (stage, 12);
clutter_actor_show (stage);
pixbuf = gdk_pixbuf_new_from_file ("redhand.png", NULL);
image = clutter_image_new ();
clutter_image_set_data (CLUTTER_IMAGE (image),
gdk_pixbuf_get_pixels (pixbuf),
gdk_pixbuf_get_has_alpha (pixbuf)
? COGL_PIXEL_FORMAT_RGBA_8888
: COGL_PIXEL_FORMAT_RGB_888,
gdk_pixbuf_get_width (pixbuf),
gdk_pixbuf_get_height (pixbuf),
gdk_pixbuf_get_rowstride (pixbuf),
NULL);
g_object_unref (pixbuf);
clutter_actor_set_content_scaling_filters (stage,
CLUTTER_SCALING_FILTER_TRILINEAR,
CLUTTER_SCALING_FILTER_LINEAR);
clutter_actor_set_content_gravity (stage, gravities[n_gravities - 1].gravity);
clutter_actor_set_content (stage, image);
g_object_unref (image);
str = g_strconcat ("Content gravity: ",
gravities[n_gravities - 1].name,
NULL);
text = clutter_text_new ();
clutter_text_set_text (CLUTTER_TEXT (text), str);
clutter_actor_add_constraint (text, clutter_align_constraint_new (stage, CLUTTER_ALIGN_BOTH, 0.5));
clutter_actor_add_child (stage, text);
g_free (str);
action = clutter_tap_action_new ();
g_signal_connect (action, "tap", G_CALLBACK (on_tap), text);
clutter_actor_add_action (stage, action);
clutter_main ();
return EXIT_SUCCESS;
}
|
