/* is the nearest stem cell in range */
Boolean check_distance(struct distance_result nearest,
double major_radius,
double minor_radius,
double thres)
{
if (nearest.nearest_distance == -1.0) {
return 1;
} else {
double theta = tan(nearest.nearest_z/nearest.nearest_xy);
double er = ellipse_radius(major_radius, minor_radius, theta);
return (thres * er < nearest.nearest_distance);
}
}
static void
ellipse_update_data(Ellipse *ellipse, AnchorShape horiz, AnchorShape vert)
{
Element *elem = &ellipse->element;
ElementBBExtras *extra = &elem->extra_spacing;
DiaObject *obj = &elem->object;
Point center, bottom_right;
Point p, c;
real dw, dh;
real width, height;
real radius1, radius2;
int i;
/* save starting points */
center = bottom_right = elem->corner;
center.x += elem->width/2;
bottom_right.x += elem->width;
center.y += elem->height/2;
bottom_right.y += elem->height;
text_calc_boundingbox(ellipse->text, NULL);
width = ellipse->text->max_width + 2 * ellipse->padding;
height = ellipse->text->height * ellipse->text->numlines +
2 * ellipse->padding;
/* stop ellipse from getting infinite width/height */
if (elem->width / elem->height > 4)
elem->width = elem->height * 4;
else if (elem->height / elem->width > 4)
elem->height = elem->width * 4;
c.x = elem->corner.x + elem->width / 2;
c.y = elem->corner.y + elem->height / 2;
p.x = c.x - width / 2;
p.y = c.y - height / 2;
radius1 = ellipse_radius(ellipse, p.x, p.y) - ellipse->border_width/2;
radius2 = distance_point_point(&c, &p);
if ( radius1 < radius2
&& ( ellipse->text_fitting == TEXTFIT_ALWAYS
|| ellipse->text_fitting == TEXTFIT_WHEN_NEEDED)) {
/* increase size of the ellipse while keeping its aspect ratio */
elem->width *= radius2 / radius1;
elem->height *= radius2 / radius1;
}
/* move shape if necessary ... */
switch (horiz) {
case ANCHOR_MIDDLE:
elem->corner.x = center.x - elem->width/2; break;
case ANCHOR_END:
elem->corner.x = bottom_right.x - elem->width; break;
default:
break;
}
switch (vert) {
case ANCHOR_MIDDLE:
elem->corner.y = center.y - elem->height/2; break;
case ANCHOR_END:
elem->corner.y = bottom_right.y - elem->height; break;
default:
break;
}
p = elem->corner;
p.x += elem->width / 2.0;
p.y += elem->height / 2.0 - ellipse->text->height*ellipse->text->numlines/2 +
ellipse->text->ascent;
switch (ellipse->text->alignment) {
case ALIGN_LEFT:
p.x -= (elem->width - 2*(ellipse->padding + ellipse->border_width))/2;
break;
case ALIGN_RIGHT:
p.x += (elem->width - 2*(ellipse->padding + ellipse->border_width))/2;
break;
case ALIGN_CENTER:
break;
}
text_set_position(ellipse->text, &p);
/* Update connections: */
c.x = elem->corner.x + elem->width / 2;
c.y = elem->corner.y + elem->height / 2;
dw = elem->width / 2.0;
dh = elem->height / 2.0;
for (i = 0; i < NUM_CONNECTIONS-1; i++) {
real theta = M_PI / 8.0 * i;
real costheta = cos(theta);
real sintheta = sin(theta);
connpoint_update(&ellipse->connections[i],
c.x + dw * costheta,
c.y - dh * sintheta,
(costheta > .5?DIR_EAST:(costheta < -.5?DIR_WEST:0))|
(sintheta > .5?DIR_NORTH:(sintheta < -.5?DIR_SOUTH:0)));
}
connpoint_update(&ellipse->connections[16],
c.x, c.y, DIR_ALL);
extra->border_trans = ellipse->border_width / 2.0;
element_update_boundingbox(elem);
obj->position = elem->corner;
element_update_handles(elem);
}
