static gint
param_units_values_cmp (GParamSpec *pspec,
const GValue *value1,
const GValue *value2)
{
ClutterUnits *units1 = value1->data[0].v_pointer;
ClutterUnits *units2 = value2->data[0].v_pointer;
gfloat v1, v2;
if (units1->unit_type == units2->unit_type)
{
v1 = units1->value;
v2 = units2->value;
}
else
{
v1 = clutter_units_to_pixels (units1);
v2 = clutter_units_to_pixels (units2);
}
if (v1 < v2)
return - (v2 - v1 > FLOAT_EPSILON);
else
return v1 - v2 > FLOAT_EPSILON;
}
//doc ClutterUnits ==(otherUnit)
IO_METHOD(IoClutterUnits, equals) {
IoClutterUnits *other = IoMessage_locals_clutterUnitsArgAt_(m, locals, 0);
int self_in_pixels = clutter_units_to_pixels(&IOCUNITS(self)),
other_in_pixels = clutter_units_to_pixels(&IOCUNITS(other));
return IOBOOL(self, self_in_pixels == other_in_pixels);
}
//doc ClutterUnits compare(otherUnit) Returns 0 if units are equal, -1 if <code>self</code> is smaller, 1 if <code>self</code> is bigger than <code>otherUnit</code>.
IO_METHOD(IoClutterUnits, compare) {
IoClutterUnits *other = IoMessage_locals_clutterUnitsArgAt_(m, locals, 0);
int self_in_pixels = clutter_units_to_pixels(&IOCUNITS(self)),
other_in_pixels = clutter_units_to_pixels(&IOCUNITS(other));
if(self_in_pixels < other_in_pixels)
return IONUMBER(-1);
else if(self_in_pixels > other_in_pixels)
return IONUMBER(1);
return IONUMBER(0);
}
//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 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;
}
IO_METHOD(IoClutterUnits, asPixels) {
return IONUMBER(clutter_units_to_pixels(&IOCUNITS(self)));
}
/* units to float */
static void
clutter_value_transform_units_float (const GValue *src,
GValue *dest)
{
dest->data[0].v_float = clutter_units_to_pixels (src->data[0].v_pointer);
}
