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
|
/* Clutter.
*
* Perl bindings for the OpenGL based 'interactive canvas' library.
*
* Clutter Authored By Matthew Allum <mallum@openedhand.com>
* Perl bindings by Emmanuele Bassi <ebassi@openedhand.com>
*
* Copyright (C) 2006 OpenedHand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "clutterperl.h"
static void
clutterperl_behaviour_alpha_notify (ClutterBehaviour *behaviour,
guint32 alpha_value)
{
HV *stash = gperl_object_stash_from_type (G_OBJECT_TYPE (behaviour));
GV *slot = gv_fetchmethod (stash, "ALPHA_NOTIFY");
if (slot && GvCV (slot)) {
dSP;
ENTER;
SAVETMPS;
PUSHMARK (SP);
EXTEND (SP, 2);
PUSHs (newSVClutterBehaviour (behaviour));
PUSHs (sv_2mortal (newSVuv (alpha_value)));
PUTBACK;
call_sv ((SV *) GvCV (slot), G_VOID | G_DISCARD);
FREETMPS;
LEAVE;
}
}
static void
clutterperl_behaviour_class_init (ClutterBehaviourClass *klass)
{
klass->alpha_notify = clutterperl_behaviour_alpha_notify;
}
static GPerlCallback *
clutterperl_behaviour_foreach_func_create (SV *func, SV *data)
{
GType param_types[] = {
CLUTTER_TYPE_BEHAVIOUR,
CLUTTER_TYPE_ACTOR,
};
guint n_param_types = G_N_ELEMENTS (param_types);
return gperl_callback_new (func, data, n_param_types, param_types, 0);
}
static void
clutterperl_behaviour_foreach_func (ClutterBehaviour *behaviour,
ClutterActor *actor,
gpointer data)
{
gperl_callback_invoke ((GPerlCallback *) data, NULL,
behaviour,
actor);
}
MODULE = Clutter::Behaviour PACKAGE = Clutter::Behaviour PREFIX = clutter_behaviour_
=for position DESCRIPTION
=head1 DESCRIPTION
B<Clutter::Behaviour> is the base class for objects controlling the behaviour
of actors. These objects are used primarily to drive a set of actors
depending on the position on a timeline, using an "alpha" function; the
alpha function is held by the L<Clutter::Alpha> object, which automatically
binds a L<Clutter::Timeline> to the function.
=cut
=for position post_enums
=head1 DERIVING NEW BEHAVIOURS
Clutter provides various behaviours, like L<Clutter::Behaviour::Opacity>,
L<Clutter::Behaviour::Path> and L<Clutter::Behaviour::Scale>. You may derive a
new behaviour from any of these, or directly from the Clutter::Behaviour
class itself.
The new behaviour must be a GObject, so you must follow the normal procedure
for creating a new Glib::Object (i.e., either using the Glib::Object::Subclass
pragmatic module or by directly calling the Glib::Type::register_object
function). The new subclass can customize the behaviour by providing a new
implementation of the following method:
=over
=item ALPHA_NOTIFY ($behaviour, $alpha_value)
=over
=item o $behaviour (Clutter::Behaviour)
=item o $alpha_value (integer) The value computed by the alpha function
=back
This is called each time the value of the alpha function held by the
L<Clutter::Alpha> object bound to the behaviour changes. You should update
the property, or the properties, of the actors your behaviour controls
using I<alpha_value>, scaled accordingly.
=cut
void
clutter_behaviour_apply (ClutterBehaviour *behaviour, ClutterActor *actor)
void
clutter_behaviour_remove (ClutterBehaviour *behaviour, ClutterActor *actor)
void
clutter_behaviour_remove_all (ClutterBehaviour *behaviour)
gboolean
clutter_behaviour_is_applied (ClutterBehaviour *behaviour, ClutterActor *actor)
void
clutter_behaviour_actors_foreach (behaviour, func, data)
ClutterBehaviour *behaviour
SV *func
SV *data
PREINIT:
GPerlCallback *callback;
CODE:
callback = clutterperl_behaviour_foreach_func_create (func, data);
clutter_behaviour_actors_foreach (behaviour,
clutterperl_behaviour_foreach_func,
callback);
gperl_callback_destroy (callback);
=for apidoc
=for signature actors = $behaviour->get_actors
=cut
void
clutter_behaviour_get_actors (ClutterBehaviour *behaviour)
PREINIT:
GSList *actors, *l;
PPCODE:
actors = clutter_behaviour_get_actors (behaviour);
for (l = actors; l != NULL; l = l->next) {
ClutterActor *actor = l->data;
XPUSHs (sv_2mortal (newSVClutterActor (actor)));
}
g_slist_free (actors);
gint
clutter_behaviour_get_n_actors (ClutterBehaviour *behaviour)
ClutterActor *
clutter_behaviour_get_nth_actor (ClutterBehaviour *behaviour, gint index)
ClutterAlpha *
clutter_behaviour_get_alpha (ClutterBehaviour *behaviour)
void
clutter_behaviour_set_alpha (ClutterBehaviour *behaviour, ClutterAlpha *alpha)
=for apidoc Clutter::Behaviour::_INSTALL_OVERRIDES __hide__
=cut
void
_INSTALL_OVERRIDES (const char *package)
PREINIT:
GType gtype;
ClutterBehaviourClass *klass;
CODE:
gtype = gperl_object_type_from_package (package);
if (!gtype) {
croak ("package `%s' is not registered with Clutter-Perl",
package);
}
if (!g_type_is_a (gtype, CLUTTER_TYPE_BEHAVIOUR)) {
croak ("package `%s'(%s) is not a Clutter::Behaviour",
package, g_type_name (gtype));
}
klass = g_type_class_peek (gtype);
if (!klass) {
croak ("INTERNAL ERROR: can't peek a type class for %s (%d)",
g_type_name (gtype), gtype);
}
clutterperl_behaviour_class_init (klass);
## allow chain up of the parent's alpha_notify vfunc
=for apidoc Clutter::Behaviour::ALPHA_NOTIFY __hide__
=cut
void
ALPHA_NOTIFY (ClutterBehaviour *behaviour, guint32 alpha_value)
PREINIT:
ClutterBehaviourClass *klass;
GType thisclass, parent_class;
SV *saveddefsv;
CODE:
saveddefsv = newSVsv (DEFSV);
eval_pv ("$_ = caller;", 0);
thisclass = gperl_type_from_package (SvPV_nolen (DEFSV));
SvSetSV (DEFSV, saveddefsv);
if (!thisclass)
thisclass = G_OBJECT_TYPE (behaviour);
parent_class = g_type_parent (thisclass);
if (!g_type_is_a (parent_class, CLUTTER_TYPE_BEHAVIOUR)) {
croak ("parent of %s is not a Clutter::Behaviour",
g_type_name (thisclass));
}
klass = g_type_class_peek (parent_class);
if (klass->alpha_notify) {
klass->alpha_notify (behaviour, alpha_value);
}
|
