/*!
* \brief Update handle positions to reflect the current object state
*
* The object bounding box needs to be calculated already.
* \protected \memberof StdPath
*/
static void
stdpath_update_handles(StdPath *stdpath)
{
DiaObject *obj = &stdpath->object;
PolyBBExtras extra = { 0, };
Rectangle rect, *bb;
g_return_if_fail (obj->handles != NULL);
/* Using the zero-line-width boundingbox for handles */
bb = ▭
polybezier_bbox (stdpath->points, stdpath->num_points, &extra,
FALSE /*(stdpath->stroke_or_fill & PDO_FILL)*/, bb);
/* from left to right, from top to bottom */
obj->handles[0]->pos.x = bb->left;
obj->handles[0]->pos.y = bb->top;
obj->handles[1]->pos.x = (bb->left + bb->right) / 2.0;
obj->handles[1]->pos.y = bb->top;
/* adjust handle pos for runtime shear? */
obj->handles[2]->pos.x = bb->right;
obj->handles[2]->pos.y = bb->top;
obj->handles[3]->pos.x = bb->left;
obj->handles[3]->pos.y = (bb->top + bb->bottom) / 2.0;
obj->handles[4]->pos.x = bb->right;
obj->handles[4]->pos.y = (bb->top + bb->bottom) / 2.0;
/* adjust handle pos for runtime perspective? */
obj->handles[5]->pos.x = bb->left;
obj->handles[5]->pos.y = bb->bottom;
obj->handles[6]->pos.x = (bb->left + bb->right) / 2.0;
obj->handles[6]->pos.y = bb->bottom;
obj->handles[7]->pos.x = bb->right;
obj->handles[7]->pos.y = bb->bottom;
}
void polyline_bbox(const Point *pts, int numpoints,
const PolyBBExtras *extra, bool closed,
Rectangle *rect)
{
int i;
BezPoint bpts[numpoints+1];
bpts[0].type = BezPoint::BEZ_MOVE_TO;
bpts[0].p1 = pts[0];
for (i=1;i<numpoints;i++) {
bpts[i].type = BezPoint::BEZ_LINE_TO;
bpts[i].p1 = pts[i];
}
polybezier_bbox(bpts,numpoints + (closed?1:0),extra,closed,rect);
}
/*!
* \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);
}
/** Calculate the boundingbox for a polyline.
* @param pts Array of points.
* @param numpoints Number of elements in `pts'.
* @param extra Extra space information
* @param closed Whether the polyline is closed or not.
* @param rect Return value: The bounding box that includes the points and
* extra spacing.
* @bug Surely doesn't need to use bezier code, but remember extra stuff.
*/
void
polyline_bbox(const Point *pts, int numpoints,
const PolyBBExtras *extra, gboolean closed,
Rectangle *rect)
{
/* It's much easier to re-use the Bezier code... */
int i;
BezPoint *bpts = alloc_polybezier_space(numpoints + 1);
bpts[0].type = BEZ_MOVE_TO;
bpts[0].p1 = pts[0];
for (i=1;i<numpoints;i++) {
bpts[i].type = BEZ_LINE_TO;
bpts[i].p1 = pts[i];
}
/* This one will be used only when closed==TRUE... */
bpts[numpoints].type = BEZ_LINE_TO;
bpts[numpoints].p1 = pts[0];
polybezier_bbox(bpts,numpoints + (closed?1:0),extra,closed,rect);
free_polybezier_space(bpts);
}
static void
update_bounds(ShapeInfo *info)
{
GList *tmp;
Point pt;
for (tmp = info->display_list; tmp; tmp = tmp->next) {
GraphicElement *el = tmp->data;
int i;
switch (el->type) {
case GE_SUBSHAPE:
/* subshapes are not supposed to have an influence on bounds */
break;
case GE_LINE:
check_point(info, &(el->line.p1));
check_point(info, &(el->line.p2));
break;
case GE_POLYLINE:
for (i = 0; i < el->polyline.npoints; i++)
check_point(info, &(el->polyline.points[i]));
break;
case GE_POLYGON:
for (i = 0; i < el->polygon.npoints; i++)
check_point(info, &(el->polygon.points[i]));
break;
case GE_RECT:
check_point(info, &(el->rect.corner1));
check_point(info, &(el->rect.corner2));
/* el->rect.corner_radius has no infulence on the bounding rectangle */
break;
case GE_TEXT:
check_point(info, &(el->text.anchor));
break;
case GE_ELLIPSE:
pt = el->ellipse.center;
pt.x -= el->ellipse.width / 2.0;
pt.y -= el->ellipse.height / 2.0;
check_point(info, &pt);
pt.x += el->ellipse.width;
pt.y += el->ellipse.height;
check_point(info, &pt);
break;
case GE_PATH:
case GE_SHAPE:
#if 1
{
Rectangle bbox;
PolyBBExtras extra = { 0, };
polybezier_bbox(&el->path.points[0],el->path.npoints,
&extra,el->type == GE_SHAPE,&bbox);
rectangle_union(&info->shape_bounds, &bbox);
}
#else
for (i = 0; i < el->path.npoints; i++)
switch (el->path.points[i].type) {
case BEZ_CURVE_TO:
check_point(info, &el->path.points[i].p3);
check_point(info, &el->path.points[i].p2);
case BEZ_MOVE_TO:
case BEZ_LINE_TO:
check_point(info, &el->path.points[i].p1);
}
#endif
break;
case GE_IMAGE:
check_point(info, &(el->image.topleft));
pt.x = el->image.topleft.x + el->image.width;
pt.y = el->image.topleft.y + el->image.height;
check_point(info, &pt);
break;
}
}
{
real width = info->shape_bounds.right-info->shape_bounds.left;
real height = info->shape_bounds.bottom-info->shape_bounds.top;
if (info->default_width > 0.0 && info->default_height == 0.0) {
info->default_height = (info->default_width / width) * height;
} else if (info->default_height > 0.0 && info->default_width == 0.0) {
info->default_width = (info->default_height / height) * width;
}
}
}