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[animation] Interval::compute_value should return a boolean

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If the computation of the interval value depending on the progress
was not successful, ClutterInterval::compute_value() should return
this information to the caller.
This commit is contained in:
Emmanuele Bassi 2009-01-07 18:18:59 +00:00
parent 854cf5d499
commit ff48c3ef7c
3 changed files with 28 additions and 11 deletions
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4
clutter/clutter-animation.c
View File

@ -683,9 +683,9 @@ on_alpha_notify (GObject *gobject,
g_value_init (&value, clutter_interval_get_value_type (interval));
factor = (gdouble) alpha_value / CLUTTER_ALPHA_MAX_ALPHA;
clutter_interval_compute_value (interval, factor, &value);
g_object_set_property (G_OBJECT (priv->actor), p_name, &value);
if (clutter_interval_compute_value (interval, factor, &value))
g_object_set_property (G_OBJECT (priv->actor), p_name, &value);
g_value_unset (&value);
}

31
clutter/clutter-interval.c
View File

@ -172,13 +172,14 @@ clutter_interval_real_validate (ClutterInterval *interval,
return TRUE;
}
static void
static gboolean
clutter_interval_real_compute_value (ClutterInterval *interval,
gdouble factor,
GValue *value)
{
GValue *initial, *final;
GType value_type;
gboolean retval = FALSE;
initial = clutter_interval_peek_initial_value (interval);
final = clutter_interval_peek_final_value (interval);
@ -197,6 +198,8 @@ clutter_interval_real_compute_value (ClutterInterval *interval,
res = (factor * (ib - ia)) + ia;
g_value_set_int (value, res);
retval = TRUE;
}
break;
@ -210,6 +213,8 @@ clutter_interval_real_compute_value (ClutterInterval *interval,
res = (factor * (ib - (gdouble) ia)) + ia;
g_value_set_uint (value, res);
retval = TRUE;
}
break;
@ -223,6 +228,8 @@ clutter_interval_real_compute_value (ClutterInterval *interval,
res = (factor * (ib - (gdouble) ia)) + ia;
g_value_set_uchar (value, res);
retval = TRUE;
}
break;
@ -240,6 +247,8 @@ clutter_interval_real_compute_value (ClutterInterval *interval,
g_value_set_double (value, res);
else
g_value_set_float (value, res);
retval = TRUE;
}
break;
@ -248,6 +257,8 @@ clutter_interval_real_compute_value (ClutterInterval *interval,
g_value_set_boolean (value, TRUE);
else
g_value_set_boolean (value, FALSE);
retval = TRUE;
break;
case G_TYPE_BOXED:
@ -265,12 +276,16 @@ clutter_interval_real_compute_value (ClutterInterval *interval,
res.alpha = (factor * (ib->alpha - (gdouble) ia->alpha)) + ia->alpha;
clutter_value_set_color (value, &res);
retval = TRUE;
}
break;
default:
break;
}
return retval;
}
static void
@ -837,19 +852,21 @@ clutter_interval_validate (ClutterInterval *interval,
* Computes the value between the @interval boundaries given the
* progress @factor and puts it into @value.
*
* Return value: %TRUE if the operation was successful
*
* Since: 1.0
*/
void
gboolean
clutter_interval_compute_value (ClutterInterval *interval,
gdouble factor,
GValue *value)
{
g_return_if_fail (CLUTTER_IS_INTERVAL (interval));
g_return_if_fail (value != NULL);
g_return_val_if_fail (CLUTTER_IS_INTERVAL (interval), FALSE);
g_return_val_if_fail (value != NULL, FALSE);
factor = CLAMP (factor, 0.0, 1.0);
CLUTTER_INTERVAL_GET_CLASS (interval)->compute_value (interval,
factor,
value);
return CLUTTER_INTERVAL_GET_CLASS (interval)->compute_value (interval,
factor,
value);
}

4
clutter/clutter-interval.h
View File

@ -79,7 +79,7 @@ struct _ClutterIntervalClass
/*< public >*/
gboolean (* validate) (ClutterInterval *interval,
GParamSpec *pspec);
void (* compute_value) (ClutterInterval *interval,
gboolean (* compute_value) (ClutterInterval *interval,
gdouble factor,
GValue *value);
@ -122,7 +122,7 @@ void clutter_interval_get_interval (ClutterInterval *interval,
gboolean clutter_interval_validate (ClutterInterval *interval,
GParamSpec *pspec);
void clutter_interval_compute_value (ClutterInterval *interval,
gboolean clutter_interval_compute_value (ClutterInterval *interval,
gdouble factor,
GValue *value);