/*!
* \brief Object update function called after property change
*
* Not in the object interface but very important anyway.
* Used to recalculate the object data after a change
* \protected \memberof StdPath
*/
static void
stdpath_update_data (StdPath *stdpath)
{
DiaObject *obj = &stdpath->object;
Rectangle *bb = &obj->bounding_box;
PolyBBExtras extra = { 0 };
real lw = stdpath->stroke_or_fill & PDO_STROKE ? stdpath->line_width : 0.0;
extra.start_trans =
extra.end_trans =
extra.start_long =
extra.end_long =
extra.middle_trans = lw/2.0;
/* recalculate the bounding box */
polybezier_bbox (stdpath->points, stdpath->num_points, &extra,
FALSE /*(stdpath->stroke_or_fill & PDO_FILL)*/, bb);
/* adjust position from it */
obj->position.x = stdpath->points[0].p1.x;
obj->position.y = stdpath->points[0].p1.y;
/* adjust handles */
stdpath_update_handles (stdpath);
}
/*!
* \brief Change the direction of the path
*/
static void
_stdpath_invert (StdPath *stdpath)
{
BezPoint *bezier = stdpath->points;
gsize n = stdpath->num_points;
BezPoint *inverted = g_alloca (sizeof(BezPoint)*n);
guint i;
inverted[0].type = BEZ_MOVE_TO;
inverted[0].p1 = (bezier[n-1].type == BEZ_CURVE_TO ? bezier[n-1].p3 : bezier[n-1].p1);
for (i = 1; i < n; ++i) {
inverted[i].type = bezier[n-i].type;
if (bezier[n-i].type == BEZ_CURVE_TO) {
inverted[i].p1 = bezier[n-i].p2;
inverted[i].p2 = bezier[n-i].p1;
inverted[i].p3 = (bezier[n-i-1].type == BEZ_CURVE_TO ? bezier[n-i-1].p3 : bezier[n-i-1].p1);
} else {
inverted[i].p1 = (bezier[n-i-1].type == BEZ_CURVE_TO ? bezier[n-i-1].p3 : bezier[n-i-1].p1);
}
}
memcpy (stdpath->points, inverted, sizeof(BezPoint)*n);
stdpath_update_handles (stdpath);
}
/*!
* \brief Change the object state regarding selection
* \memberof StdPath
*/
static void
stdpath_select (StdPath *stdpath, Point *clicked_point,
DiaRenderer *interactive_renderer)
{
stdpath_update_handles (stdpath);
}