static void
_adg_arrange(AdgEntity *entity)
{
AdgAlignmentPrivate *data;
const CpmlExtents *extents;
CpmlExtents new_extents;
cairo_matrix_t ctm, ctm_inverted, old_map;
if (_ADG_OLD_ENTITY_CLASS->arrange == NULL)
return;
data = adg_alignment_get_instance_private((AdgAlignment *) entity);
extents = adg_entity_get_extents(entity);
data->shift.x = 0;
data->shift.y = 0;
/* The shift is performed only when relevant */
if (data->factor.x != 0 || data->factor.y != 0) {
/* Force the ctm to be the identity matrix */
adg_matrix_copy(&old_map, adg_entity_get_global_map(entity));
adg_matrix_copy(&ctm, adg_entity_get_global_map(entity));
adg_matrix_transform(&ctm, adg_entity_get_local_matrix(entity),
ADG_TRANSFORM_AFTER);
adg_matrix_copy(&ctm_inverted, &ctm);
cairo_matrix_invert(&ctm_inverted);
adg_entity_transform_global_map(entity, &ctm_inverted,
ADG_TRANSFORM_AFTER);
adg_entity_global_changed(entity);
/* Calculating the shift */
_ADG_OLD_ENTITY_CLASS->arrange(entity);
extents = adg_entity_get_extents(entity);
if (extents->is_defined) {
data->shift.x = -extents->size.x * data->factor.x;
data->shift.y = -extents->size.y * data->factor.y;
cpml_vector_transform(&data->shift, &ctm);
}
/* Restore the old global map */
adg_entity_set_global_map(entity, &old_map);
adg_entity_global_changed(entity);
}
/* Add the shift to the extents */
_ADG_OLD_ENTITY_CLASS->arrange(entity);
cpml_extents_copy(&new_extents, adg_entity_get_extents(entity));
new_extents.org.x += data->shift.x;
new_extents.org.y += data->shift.y;
adg_entity_set_extents(entity, &new_extents);
}
static gboolean
_adg_get_map(GtkWidget *widget, gboolean local_space,
cairo_matrix_t *map, cairo_matrix_t *inverted)
{
AdgGtkAreaPrivate *data;
AdgEntity *entity;
data = ((AdgGtkArea *) widget)->data;
entity = (AdgEntity *) data->canvas;
if (entity == NULL)
return FALSE;
if (local_space) {
adg_matrix_copy(map, adg_entity_get_local_map(entity));
/* The inverted map is subject to the global matrix */
adg_matrix_copy(inverted, adg_entity_get_global_matrix(entity));
adg_matrix_transform(inverted, map, ADG_TRANSFORM_BEFORE);
} else {
adg_matrix_copy(map, adg_entity_get_global_map(entity));
adg_matrix_copy(inverted, map);
}
return cairo_matrix_invert(inverted) == CAIRO_STATUS_SUCCESS;
}