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path-constraint: Add a ::node-reached signal

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Emit a signal whenever a node in the path has been reached.
This commit is contained in:
Emmanuele Bassi
2010-11-07 21:35:40 +00:00
parent ef7f729c68
commit 26a70707ab
3 changed files with 114 additions and 1 deletions
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43
clutter/clutter-path-constraint.c
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@ -43,6 +43,7 @@
#include "clutter-path-constraint.h"
#include "clutter-debug.h"
#include "clutter-marshal.h"
#include "clutter-private.h"
#define CLUTTER_PATH_CONSTRAINT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CLUTTER_TYPE_PATH_CONSTRAINT, ClutterPathConstraintClass))
@ -60,6 +61,8 @@ struct _ClutterPathConstraint
gfloat offset;
ClutterActor *actor;
guint current_node;
};
struct _ClutterPathConstraintClass
@ -77,9 +80,17 @@ enum
LAST_PROPERTY
};
enum
{
NODE_REACHED,
LAST_SIGNAL
};
G_DEFINE_TYPE (ClutterPathConstraint, clutter_path_constraint, CLUTTER_TYPE_CONSTRAINT);
static GParamSpec *path_properties[LAST_PROPERTY] = { NULL, };
static guint path_signals[LAST_SIGNAL] = { 0, };
static void
clutter_path_constraint_update_allocation (ClutterConstraint *constraint,
@ -100,6 +111,14 @@ clutter_path_constraint_update_allocation (ClutterConstraint *constraint,
allocation->y1 = position.y;
allocation->x2 = allocation->x1 + width;
allocation->y2 = allocation->y1 + height;
if (knot_id != self->current_node)
{
self->current_node = knot_id;
g_signal_emit (self, path_signals[NODE_REACHED], 0,
self->actor,
self->current_node);
}
}
static void
@ -222,12 +241,36 @@ clutter_path_constraint_class_init (ClutterPathConstraintClass *klass)
meta_class->set_actor = clutter_path_constraint_set_actor;
constraint_class->update_allocation = clutter_path_constraint_update_allocation;
/**
* ClutterPathConstraint::node-reached:
* @constraint: the #ClutterPathConstraint that emitted the signal
* @actor: the #ClutterActor using the @constraint
* @index: the index of the node that has been reached
*
* The ::node-reached signal is emitted each time a
* #ClutterPathConstraint:offset value results in the actor
* passing a #ClutterPathNode
*
* Since: 1.6
*/
path_signals[NODE_REACHED] =
g_signal_new (I_("node-reached"),
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL,
_clutter_marshal_VOID__OBJECT_UINT,
G_TYPE_NONE, 2,
CLUTTER_TYPE_ACTOR,
G_TYPE_UINT);
}
static void
clutter_path_constraint_init (ClutterPathConstraint *self)
{
self->offset = 0.0f;
self->current_node = G_MAXUINT;
}
/**