//doc ClutterUnits withPx(valueInPx)
IO_METHOD(IoClutterUnits, withPx) {
ClutterUnits units;
clutter_units_from_pixels(
&units,
IoMessage_locals_intArgAt_(m, locals, 0)
);
return IoClutterUnits_newWithUnits(IOSTATE, units);
}
//doc ClutterUnits -(otherUnit)
IO_METHOD(IoClutterUnits, subtract) {
IoObject *other = IoMessage_locals_valueArgAt_(m, locals, 0);
int self_in_pixels = clutter_units_to_pixels(&IOCUNITS(self)),
other_in_pixels = 0;
ClutterUnits units;
if(ISNUMBER(other)) {
other_in_pixels = CNUMBER(other);
} else if(ISCLUTTERUNITS(other)) {
other_in_pixels = clutter_units_to_pixels(&IOCUNITS(other));
} else {
IoState_error_(IOSTATE, m, "ClutterUnits arithmetic works only for Numbers and other ClutterUnits.");
return IONIL(self);
}
clutter_units_from_pixels(&units, self_in_pixels - other_in_pixels);
return IoClutterUnits_newWithUnits(IOSTATE, units);
}
static void
dax_element_video_init (DaxElementVideo *self)
{
DaxElementVideoPrivate *priv;
DaxPreserveAspectRatio par;
ClutterUnits zero;
self->priv = priv = ELEMENT_VIDEO_PRIVATE (self);
clutter_units_from_pixels (&zero, 0.0f);
priv->x = clutter_units_copy (&zero);
priv->y = clutter_units_copy (&zero);
priv->width = clutter_units_copy (&zero);
priv->height = clutter_units_copy (&zero);
dax_preserve_aspect_ratio_set_default (&par);
priv->par = dax_preserve_aspect_ratio_copy (&par);
}
static gboolean
clutter_units_progress (const GValue *a,
const GValue *b,
gdouble progress,
GValue *retval)
{
ClutterUnits *a_units = (ClutterUnits *) clutter_value_get_units (a);
ClutterUnits *b_units = (ClutterUnits *) clutter_value_get_units (b);
ClutterUnits res;
gfloat a_px, b_px, value;
a_px = clutter_units_to_pixels (a_units);
b_px = clutter_units_to_pixels (b_units);
value = progress * (b_px - a_px) + a_px;
clutter_units_from_pixels (&res, value);
clutter_value_set_units (retval, &res);
return TRUE;
}
/* float to units */
static void
clutter_value_transform_float_units (const GValue *src,
GValue *dest)
{
clutter_units_from_pixels (dest->data[0].v_pointer, src->data[0].v_float);
}
