/**
* adg_point_get_pair:
* @point: an #AdgPoint
*
* #AdgPoint is an evolution of the pair concept but internally the
* relevant data is still stored in an #CpmlPair struct. This function
* returns a copy of the internally owned pair.
*
* <note><para>
* The #CpmlPair is the first field of an #AdgPoint struct so casting
* is allowed between them and, in fact, it is often more convenient
* than calling this function. Just remember to update the internal
* pair by using adg_point_update() before.
* </para></note>
*
* Returns: (transfer full): the pair of @point or <constant>NULL</constant> if the named pair does not exist.
*
* Since: 1.0
**/
CpmlPair *
adg_point_get_pair(AdgPoint *point)
{
g_return_val_if_fail(point != NULL, NULL);
if (! adg_point_update(point))
return NULL;
return cpml_pair_dup(& point->pair);
}
static void
_adg_behavior_named_pair(void)
{
CpmlPair p1 = { 123, 456 };
AdgPoint *explicit_point, *explicit_point2, *model_point;
AdgModel *model;
CpmlPair *pair;
explicit_point = adg_point_new();
g_assert_nonnull(explicit_point);
adg_point_set_pair(explicit_point, &p1);
explicit_point2 = adg_point_new();
g_assert_nonnull(explicit_point2);
adg_point_set_pair_explicit(explicit_point2, p1.x, p1.y);
/* Checking comparison APIs */
g_assert_true(adg_point_equal(explicit_point, explicit_point2));
adg_point_set_pair_explicit(explicit_point2, 78, 90);
g_assert_false(adg_point_equal(explicit_point, explicit_point2));
pair = (CpmlPair *) explicit_point2;
adg_assert_isapprox(pair->x, 78);
adg_assert_isapprox(pair->y, 90);
pair = adg_point_get_pair(explicit_point);
g_assert_true(cpml_pair_equal(pair, &p1));
g_free(pair);
model = ADG_MODEL(adg_path_new());
g_assert_nonnull(model);
adg_model_set_named_pair(model, "named-pair", &p1);
model_point = adg_point_new();
g_assert_nonnull(model_point);
adg_point_set_pair_from_model(model_point, model, "named-pair");
pair = adg_point_get_pair(model_point);
g_assert_true(cpml_pair_equal(pair, &p1));
g_free(pair);
/* Ensure ADG does not consider an explicit point equals to
* a point bound to a named pair with the same coordinates */
g_assert_false(adg_point_equal(explicit_point, model_point));
/* Check for lazy evaluation of named pairs */
adg_point_set_pair_from_model(model_point, model, "unexistent-pair");
pair = (CpmlPair *) model_point;
adg_assert_isapprox(pair->x, p1.x);
adg_assert_isapprox(pair->y, p1.y);
/* Check behavior on undefined named pair */
g_assert_false(adg_point_update(model_point));
g_assert_null(adg_point_get_pair(model_point));
adg_point_set_pair_from_model(model_point, model, "named-pair");
g_assert_true(adg_point_update(model_point));
/* Check for case sensitiveness */
adg_point_set_pair_from_model(model_point, model, "Named-Pair");
g_assert_null(adg_point_get_pair(model_point));
g_assert_false(adg_point_update(model_point));
/* Check if adg_point_get_pair() triggers an adg_point_update() */
adg_point_set_pair_from_model(model_point, model, "named-pair");
pair = adg_point_get_pair(model_point);
g_assert_true(cpml_pair_equal(pair, &p1));
g_free(pair);
adg_point_destroy(explicit_point);
adg_point_destroy(model_point);
g_object_unref(model);
}
static gboolean
_adg_get_info(AdgADim *adim, CpmlVector vector[],
CpmlPair *center, gdouble *distance)
{
AdgDim *dim;
AdgADimPrivate *data;
AdgPoint *ref1_point, *ref2_point, *pos_point;
const CpmlPair *ref1, *ref2, *pos;
const CpmlPair *org1, *org2;
gdouble factor;
dim = (AdgDim *) adim;
data = adim->data;
ref1_point = adg_dim_get_ref1(dim);
ref2_point = adg_dim_get_ref2(dim);
pos_point = adg_dim_get_pos(dim);
/* Check if the needed points are all properly defined */
if (! adg_point_update(ref1_point) ||
! adg_point_update(ref2_point) ||
! adg_point_update(pos_point) ||
! adg_point_update(data->org1) ||
! adg_point_update(data->org2))
{
return FALSE;
}
ref1 = (CpmlPair *) ref1_point;
ref2 = (CpmlPair *) ref2_point;
pos = (CpmlPair *) pos_point;
org1 = (CpmlPair *) data->org1;
org2 = (CpmlPair *) data->org2;
/* Check if the given points have valid coordinates */
if (cpml_pair_equal(ref1, org1)) {
g_warning(_("%s: ref1 and org1 cannot be coincidents (%lf, %lf)"),
G_STRLOC, ref1->x, ref1->y);
return FALSE;
}
if (cpml_pair_equal(ref2, org2)) {
g_warning(_("%s: ref2 and org2 cannot be coincidents (%lf, %lf)"),
G_STRLOC, ref2->x, ref2->y);
return FALSE;
}
vector[0].x = ref1->x - org1->x;
vector[0].y = ref1->y - org1->y;
vector[2].x = ref2->x - org2->x;
vector[2].y = ref2->y - org2->y;
factor = vector[0].x * vector[2].y - vector[0].y * vector[2].x;
if (factor == 0) {
/* Parallel lines: hang with an error message */
g_warning(_("%s: trying to set an angular dimension on parallel lines"),
G_STRLOC);
return FALSE;
}
factor = ((ref1->y - ref2->y) * vector[2].x -
(ref1->x - ref2->x) * vector[2].y) / factor;
center->x = ref1->x + vector[0].x * factor;
center->y = ref1->y + vector[0].y * factor;
*distance = cpml_pair_distance(center, pos);
data->angle1 = cpml_vector_angle(&vector[0]);
data->angle2 = cpml_vector_angle(&vector[2]);
while (data->angle2 < data->angle1)
data->angle2 += G_PI * 2;
cpml_vector_from_angle(&vector[1], (data->angle1 + data->angle2) / 2);
return TRUE;
}