static void
beziergon_update_data(Beziergon *beziergon)
{
BezierShape *bez = &beziergon->bezier;
DiaObject *obj = &bez->object;
ElementBBExtras *extra = &bez->extra_spacing;
beziershape_update_data(bez);
extra->border_trans = beziergon->line_width / 2.0;
beziershape_update_boundingbox(bez);
/* update the enclosing box using the control points */
{
int i, num_points = bez->bezier.num_points;
obj->enclosing_box = obj->bounding_box;
for (i = 0; i < num_points; ++i) {
if (bez->bezier.points[i].type != BEZ_CURVE_TO)
continue;
rectangle_add_point(&obj->enclosing_box, &bez->bezier.points[i].p1);
rectangle_add_point(&obj->enclosing_box, &bez->bezier.points[i].p2);
}
}
obj->position = bez->bezier.points[0].p1;
}
ObjectChange *
beziershape_remove_segment(BezierShape *bezier, int pos)
{
Handle *old_handle1, *old_handle2, *old_handle3;
ConnectionPoint *old_cp1, *old_cp2;
BezPoint old_point;
BezCornerType old_ctype;
int next = pos+1;
g_assert(pos > 0);
g_assert(bezier->numpoints > 2);
g_assert(pos < bezier->numpoints);
if (pos == bezier->numpoints - 1)
next = 1;
old_handle1 = bezier->object.handles[3*pos-3];
old_handle2 = bezier->object.handles[3*pos-2];
old_handle3 = bezier->object.handles[3*pos-1];
old_point = bezier->points[pos];
/* remember the old contro point of following bezpoint */
old_point.p1 = bezier->points[next].p1;
old_ctype = bezier->corner_types[pos];
old_cp1 = bezier->object.connections[2*pos-2];
old_cp2 = bezier->object.connections[2*pos-1];
object_unconnect((DiaObject *)bezier, old_handle1);
object_unconnect((DiaObject *)bezier, old_handle2);
object_unconnect((DiaObject *)bezier, old_handle3);
remove_handles(bezier, pos);
beziershape_update_data(bezier);
return beziershape_create_point_change(bezier, TYPE_REMOVE_POINT,
&old_point, old_ctype, pos,
old_handle1, old_handle2, old_handle3,
old_cp1, old_cp2);
}
static void
beziershape_straighten_corner(BezierShape *bez, int comp_nr) {
int next_nr;
if (comp_nr == 0) comp_nr = bez->numpoints - 1;
next_nr = comp_nr + 1;
if (comp_nr == bez->numpoints - 1)
next_nr = 1;
/* Neat thing would be to have the kind of straigthening depend on
which handle was chosen: Mid-handle does average, other leaves that
handle where it is. */
bez->points[0].p3 = bez->points[0].p1;
switch (bez->corner_types[comp_nr]) {
case BEZ_CORNER_SYMMETRIC: {
Point pt1, pt2;
pt1 = bez->points[comp_nr].p3;
point_sub(&pt1, &bez->points[comp_nr].p2);
pt2 = bez->points[comp_nr].p3;
point_sub(&pt2, &bez->points[next_nr].p1);
point_scale(&pt2, -1.0);
point_add(&pt1, &pt2);
point_scale(&pt1, 0.5);
pt2 = pt1;
point_scale(&pt1, -1.0);
point_add(&pt1, &bez->points[comp_nr].p3);
point_add(&pt2, &bez->points[comp_nr].p3);
bez->points[comp_nr].p2 = pt1;
bez->points[next_nr].p1 = pt2;
beziershape_update_data(bez);
}
break;
case BEZ_CORNER_SMOOTH: {
Point pt1, pt2;
real len1, len2;
pt1 = bez->points[comp_nr].p3;
point_sub(&pt1, &bez->points[comp_nr].p2);
pt2 = bez->points[comp_nr].p3;
point_sub(&pt2, &bez->points[next_nr].p1);
len1 = point_len(&pt1);
len2 = point_len(&pt2);
point_scale(&pt2, -1.0);
if (len1 > 0)
point_normalize(&pt1);
if (len2 > 0)
point_normalize(&pt2);
point_add(&pt1, &pt2);
point_scale(&pt1, 0.5);
pt2 = pt1;
point_scale(&pt1, -len1);
point_add(&pt1, &bez->points[comp_nr].p3);
point_scale(&pt2, len2);
point_add(&pt2, &bez->points[comp_nr].p3);
bez->points[comp_nr].p2 = pt1;
bez->points[next_nr].p1 = pt2;
beziershape_update_data(bez);
}
break;
case BEZ_CORNER_CUSP:
break;
}
bez->points[0].p1 = bez->points[0].p3;
}
static void
beziergon_select(Beziergon *beziergon, Point *clicked_point,
DiaRenderer *interactive_renderer)
{
beziershape_update_data(&beziergon->bezier);
}
