static void
implements_move_handle(Implements *implements, Handle *handle,
Point *to, HandleMoveReason reason, ModifierKeys modifiers)
{
Point v1, v2;
assert(implements!=NULL);
assert(handle!=NULL);
assert(to!=NULL);
if (handle->id == HANDLE_MOVE_TEXT) {
implements->text_pos = *to;
} else if (handle->id == HANDLE_CIRCLE_SIZE) {
v1 = implements->connection.endpoints[0];
point_sub(&v1, &implements->connection.endpoints[1]);
point_normalize(&v1);
v2 = *to;
point_sub(&v2, &implements->connection.endpoints[1]);
implements->circle_diameter = point_dot(&v1, &v2);
if (implements->circle_diameter<0.03)
implements->circle_diameter = 0.03;
} else {
v1 = implements->connection.endpoints[1];
connection_move_handle(&implements->connection, handle->id, to, reason);
point_sub(&v1, &implements->connection.endpoints[1]);
point_sub(&implements->text_pos, &v1);
}
implements_update_data(implements);
}
static ObjectChange*
mbr_move_handle(Mbr *mbr, Handle *handle,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason, ModifierKeys modifiers)
{
Point p1, p2;
Point *endpoints;
assert(mbr!=NULL);
assert(handle!=NULL);
assert(to!=NULL);
if (handle->id == HANDLE_MOVE_MID_POINT) {
mbr->pm = *to;
} else {
endpoints = &mbr->connection.endpoints[0];
p1.x = 0.5*(endpoints[0].x + endpoints[1].x);
p1.y = 0.5*(endpoints[0].y + endpoints[1].y);
connection_move_handle(&mbr->connection, handle->id, to, cp, reason, modifiers);
p2.x = 0.5*(endpoints[0].x + endpoints[1].x);
p2.y = 0.5*(endpoints[0].y + endpoints[1].y);
point_sub(&p2, &p1);
point_add(&mbr->pm, &p2);
}
mbr_update_data(mbr);
return NULL;
}
static void
message_move_handle(Message *message, Handle *handle,
Point *to, HandleMoveReason reason, ModifierKeys modifiers)
{
Point p1, p2;
Point *endpoints;
assert(message!=NULL);
assert(handle!=NULL);
assert(to!=NULL);
if (handle->id == HANDLE_MOVE_TEXT) {
message->text_pos = *to;
} else {
endpoints = &message->connection.endpoints[0];
p1.x = 0.5*(endpoints[0].x + endpoints[1].x);
p1.y = 0.5*(endpoints[0].y + endpoints[1].y);
connection_move_handle(&message->connection, handle->id, to, reason);
p2.x = 0.5*(endpoints[0].x + endpoints[1].x);
p2.y = 0.5*(endpoints[0].y + endpoints[1].y);
point_sub(&p2, &p1);
point_add(&message->text_pos, &p2);
}
message_update_data(message);
}
static void
arc_move_handle(Arc *arc, Handle *handle,
Point *to, HandleMoveReason reason, ModifierKeys modifiers)
{
assert(arc!=NULL);
assert(handle!=NULL);
assert(to!=NULL);
if (handle->id == HANDLE_MIDDLE) {
Point a,b;
real tmp;
b = *to;
point_sub(&b, &arc->connection.endpoints[0]);
a = arc->connection.endpoints[1];
point_sub(&a, &arc->connection.endpoints[0]);
tmp = point_dot(&a,&b);
arc->curve_distance =
sqrt(fabs(point_dot(&b,&b) - tmp*tmp/point_dot(&a,&a)));
if (a.x*b.y - a.y*b.x < 0)
arc->curve_distance = -arc->curve_distance;
} else {
connection_move_handle(&arc->connection, handle->id, to, reason);
}
arc_update_data(arc);
}
static ObjectChange*
constraint_move_handle(Constraint *constraint, Handle *handle,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason, ModifierKeys modifiers)
{
Point p1, p2;
Point *endpoints;
assert(constraint!=NULL);
assert(handle!=NULL);
assert(to!=NULL);
if (handle->id == HANDLE_MOVE_TEXT) {
constraint->text_pos = *to;
} else {
endpoints = &constraint->connection.endpoints[0];
p1.x = 0.5*(endpoints[0].x + endpoints[1].x);
p1.y = 0.5*(endpoints[0].y + endpoints[1].y);
connection_move_handle(&constraint->connection, handle->id, to, cp,
reason, modifiers);
connection_adjust_for_autogap(&constraint->connection);
p2.x = 0.5*(endpoints[0].x + endpoints[1].x);
p2.y = 0.5*(endpoints[0].y + endpoints[1].y);
point_sub(&p2, &p1);
point_add(&constraint->text_pos, &p2);
}
constraint_update_data(constraint);
return NULL;
}
static ObjectChange*
measure_move_handle (Measure *measure,
Handle *handle,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason, ModifierKeys modifiers)
{
connection_move_handle(&measure->connection, handle->id, to, cp, reason, modifiers);
measure_update_data(measure);
return NULL;
}
static void
line_move_handle(Line *line, Handle *handle,
Point *to, HandleMoveReason reason, ModifierKeys modifiers)
{
assert(line!=NULL);
assert(handle!=NULL);
assert(to!=NULL);
connection_move_handle(&line->connection, handle->id, to, reason);
line_update_data(line);
}
static ObjectChange*
wanlink_move_handle(WanLink *wanlink, Handle *handle,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason, ModifierKeys modifiers)
{
connection_move_handle(&wanlink->connection, handle->id, to, cp,
reason, modifiers);
connection_adjust_for_autogap(&wanlink->connection);
wanlink_update_data(wanlink);
return NULL;
}
static ObjectChange*
annotation_move_handle(Annotation *annotation, Handle *handle,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason, ModifierKeys modifiers)
{
Point p1, p2;
Point *endpoints;
Connection *conn = (Connection *)annotation;
g_assert(annotation!=NULL);
g_assert(handle!=NULL);
g_assert(to!=NULL);
if (handle->id == HANDLE_MOVE_TEXT) {
annotation->text->position = *to;
} else {
endpoints = &(conn->endpoints[0]);
if (handle->id == HANDLE_MOVE_STARTPOINT) {
p1 = endpoints[0];
connection_move_handle(conn, handle->id, to, cp, reason, modifiers);
p2 = endpoints[0];
point_sub(&p2, &p1);
point_add(&annotation->text->position, &p2);
point_add(&p2,&(endpoints[1]));
connection_move_handle(conn, HANDLE_MOVE_ENDPOINT, &p2, NULL, reason, 0);
} else {
p1 = endpoints[1];
connection_move_handle(conn, handle->id, to, cp, reason, modifiers);
p2 = endpoints[1];
point_sub(&p2, &p1);
point_add(&annotation->text->position, &p2);
}
}
annotation_update_data(annotation);
return NULL;
}
static ObjectChange*
line_move_handle(Line *line, Handle *handle,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason, ModifierKeys modifiers)
{
assert(line!=NULL);
assert(handle!=NULL);
assert(to!=NULL);
connection_move_handle(&line->connection, handle->id, to, cp, reason, modifiers);
line_update_data(line);
return NULL;
}
static ObjectChange*
flow_move_handle(Flow *flow, Handle *handle,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason, ModifierKeys modifiers)
{
Point p1, p2;
Point *endpoints;
assert(flow!=NULL);
assert(handle!=NULL);
assert(to!=NULL);
if (handle->id == HANDLE_MOVE_TEXT) {
flow->textpos = *to;
} else {
real dest_length ;
real orig_length2 ;
real along_mag, norm_mag ;
Point along ;
endpoints = &flow->connection.endpoints[0];
p1 = flow->textpos ;
point_sub( &p1, &endpoints[0] ) ;
p2 = endpoints[1] ;
point_sub( &p2, &endpoints[0] ) ;
orig_length2= point_dot( &p2, &p2 ) ;
along = p2 ;
if ( orig_length2 > 1e-5 ) {
along_mag = point_dot( &p2, &p1 )/sqrt(orig_length2) ;
along_mag *= along_mag ;
norm_mag = point_dot( &p1, &p1 ) ;
norm_mag = (real)sqrt( (double)( norm_mag - along_mag ) ) ;
along_mag = (real)sqrt( along_mag/orig_length2 ) ;
if ( p1.x*p2.y - p1.y*p2.x > 0.0 )
norm_mag = -norm_mag ;
} else {
along_mag = 0.5 ;
norm_mag = (real)sqrt( (double) point_dot( &p1, &p1 ) ) ;
}
connection_move_handle(&flow->connection, handle->id, to, cp,
reason, modifiers);
p2 = endpoints[1] ;
point_sub( &p2, &endpoints[0] ) ;
flow->textpos = endpoints[0] ;
along = p2 ;
p2.x = -along.y ;
p2.y = along.x ;
dest_length = point_dot( &p2, &p2 ) ;
if ( dest_length > 1e-5 ) {
point_normalize( &p2 ) ;
} else {
p2.x = 0.0 ; p2.y = -1.0 ;
}
point_scale( &p2, norm_mag ) ;
point_scale( &along, along_mag ) ;
point_add( &flow->textpos, &p2 ) ;
point_add( &flow->textpos, &along ) ;
}
flow_update_data(flow);
return NULL;
}
static ObjectChange*
bus_move_handle(Bus *bus, Handle *handle,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason, ModifierKeys modifiers)
{
Connection *conn = &bus->connection;
Point *endpoints;
static real *parallel=NULL;
static real *perp=NULL;
static int max_num=0;
Point vhat, vhatperp;
Point u;
real vlen, vlen2;
real len_scale;
int i;
if (bus->num_handles>max_num) {
if (parallel!=NULL) {
g_free(parallel);
g_free(perp);
}
parallel = g_malloc(sizeof(real)*bus->num_handles);
perp = g_malloc(sizeof(real)*bus->num_handles);
max_num = bus->num_handles;
}
if (handle->id == HANDLE_BUS) {
handle->pos = *to;
} else {
endpoints = &conn->endpoints[0];
vhat = endpoints[1];
point_sub(&vhat, &endpoints[0]);
if ((fabs(vhat.x) == 0.0) && (fabs(vhat.y)==0.0)) {
vhat.x += 0.01;
}
vlen = sqrt(point_dot(&vhat, &vhat));
point_scale(&vhat, 1.0/vlen);
vhatperp.x = -vhat.y;
vhatperp.y = vhat.x;
for (i=0;i<bus->num_handles;i++) {
u = bus->handles[i]->pos;
point_sub(&u, &endpoints[0]);
parallel[i] = point_dot(&vhat, &u);
perp[i] = point_dot(&vhatperp, &u);
}
connection_move_handle(&bus->connection, handle->id, to, cp,
reason, modifiers);
vhat = endpoints[1];
point_sub(&vhat, &endpoints[0]);
if ((fabs(vhat.x) == 0.0) && (fabs(vhat.y)==0.0)) {
vhat.x += 0.01;
}
vlen2 = sqrt(point_dot(&vhat, &vhat));
len_scale = vlen2 / vlen;
point_normalize(&vhat);
vhatperp.x = -vhat.y;
vhatperp.y = vhat.x;
for (i=0;i<bus->num_handles;i++) {
if (bus->handles[i]->connected_to == NULL) {
u = vhat;
point_scale(&u, parallel[i]*len_scale);
point_add(&u, &endpoints[0]);
bus->parallel_points[i] = u;
u = vhatperp;
point_scale(&u, perp[i]);
point_add(&u, &bus->parallel_points[i]);
bus->handles[i]->pos = u;
}
}
}
bus_update_data(bus);
return NULL;
}
/*!
* Moving handles of a lifeline
*
* - the top handle is usually connected to an object, when moved connected
* the whole lifeline is moved horizontally (but may not any longer vertically).
* - the top box handle is used to move the whole box vertically.
* - the bottom box handle should maybe resize the box without changing the
* connection point distance, i.e. adding/removing some (maybe limited
* by connected points)
* - the bottom handle just move itself, not beyond the lower box handle
*/
static ObjectChange*
lifeline_move_handle(Lifeline *lifeline, Handle *handle,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason, ModifierKeys modifiers)
{
real s, dy;
Connection *conn;
assert(lifeline!=NULL);
assert(handle!=NULL);
assert(to!=NULL);
conn = &lifeline->connection;
if (handle->id == HANDLE_BOXBOT) {
/* distance between upper handle and boxtop must not be smaller than zero */
dy = to->y - conn->endpoints[0].y;
if (dy > lifeline_rect_size(lifeline)) {
real dist = dy - lifeline->rbot;
real di;
modf (dist, &di);
/* the integer part gives the number of points to add or remove */
if (fabs (di) > 0) {
int ni = (int)di;
if (lifeline_point_above_mid (lifeline, to) ?
lifeline->northeast->num_connections + ni > 0 :
lifeline->southeast->num_connections + ni > 0)
return lifeline_create_change (lifeline, ni > 0 ? LIFELINE_CHANGE_ADD : LIFELINE_CHANGE_DEL, to);
else
return NULL;
}
}
} else if (handle->id == HANDLE_BOXMID) {
/* the box can not move over the top - same logic, but old movement behavior as above */
real dist = (to->y - handle->pos.y); /* the potential movement */
if (dist > 0 ||
-dist < lifeline->rtop) {
lifeline->rbot += dist;
lifeline->rtop = lifeline->rbot - lifeline_rect_size(lifeline);
}
} else if (handle->id == HANDLE_BOXTOP) {
/* Distance between upper handle and boxtop must not be smaller than zero,
* Same for boxbot and lower handle */
dy = to->y - conn->endpoints[0].y;
if (dy > 0 &&
dy + lifeline_rect_size(lifeline) < conn->endpoints[1].y) {
lifeline->rtop = dy;
}
} else {
/* move horizontally only if startpoint is moved */
if (handle->id==HANDLE_MOVE_STARTPOINT) {
conn->endpoints[0].x = conn->endpoints[1].x = to->x;
} else {
to->x = conn->endpoints[0].x;
}
/* If connected don't change size */
dy = (reason==HANDLE_MOVE_CONNECTED) ?
conn->endpoints[1].y - conn->endpoints[0].y : lifeline->rbot;
connection_move_handle(conn, handle->id, to, cp, reason, modifiers);
s = conn->endpoints[1].y - conn->endpoints[0].y;
if (handle->id==HANDLE_MOVE_ENDPOINT && s < dy &&
s > lifeline->rtop + LIFELINE_BOXMINHEIGHT)
lifeline->rbot = s;
else if (reason==HANDLE_MOVE_CONNECTED || s < dy)
conn->endpoints[1].y = conn->endpoints[0].y + dy;
}
lifeline_update_data(lifeline);
return NULL;
}
static ObjectChange*
bus_move_handle(Bus *bus, Handle *handle,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason, ModifierKeys modifiers)
{
Connection *conn = &bus->connection;
Point *endpoints;
real *parallel=NULL;
real *perp=NULL;
Point vhat, vhatperp;
Point u;
real vlen, vlen2;
real len_scale;
int i;
const int num_handles = bus->num_handles; /* const to help scan-build */
/* code copied to Misc/tree.c */
parallel = (real *)g_alloca (num_handles * sizeof(real));
perp = (real *)g_alloca (num_handles * sizeof(real));
if (handle->id == HANDLE_BUS) {
handle->pos = *to;
} else {
endpoints = &conn->endpoints[0];
vhat = endpoints[1];
point_sub(&vhat, &endpoints[0]);
if ((fabs(vhat.x) == 0.0) && (fabs(vhat.y)==0.0)) {
vhat.x += 0.01;
}
vlen = sqrt(point_dot(&vhat, &vhat));
point_scale(&vhat, 1.0/vlen);
vhatperp.x = -vhat.y;
vhatperp.y = vhat.x;
for (i=0;i<num_handles;i++) {
u = bus->handles[i]->pos;
point_sub(&u, &endpoints[0]);
parallel[i] = point_dot(&vhat, &u);
perp[i] = point_dot(&vhatperp, &u);
}
connection_move_handle(&bus->connection, handle->id, to, cp,
reason, modifiers);
vhat = endpoints[1];
point_sub(&vhat, &endpoints[0]);
if ((fabs(vhat.x) == 0.0) && (fabs(vhat.y)==0.0)) {
vhat.x += 0.01;
}
vlen2 = sqrt(point_dot(&vhat, &vhat));
len_scale = vlen2 / vlen;
point_normalize(&vhat);
vhatperp.x = -vhat.y;
vhatperp.y = vhat.x;
for (i=0;i<num_handles;i++) {
if (bus->handles[i]->connected_to == NULL) {
u = vhat;
point_scale(&u, parallel[i]*len_scale);
point_add(&u, &endpoints[0]);
bus->parallel_points[i] = u;
u = vhatperp;
point_scale(&u, perp[i]);
point_add(&u, &bus->parallel_points[i]);
bus->handles[i]->pos = u;
}
}
}
bus_update_data(bus);
return NULL;
}
static ObjectChange*
arc_move_handle(Arc *arc, Handle *handle,
Point *to, ConnectionPoint *cp,
HandleMoveReason reason, ModifierKeys modifiers)
{
assert(arc!=NULL);
assert(handle!=NULL);
assert(to!=NULL);
/* A minimum distance between our three points needs to be maintained
* Otherwise our math will get unstable with unpredictable results. */
{
const Point *p1, *p2;
if (handle->id == HANDLE_MIDDLE) {
p1 = &arc->connection.endpoints[0];
p2 = &arc->connection.endpoints[1];
} else if (handle->id == HANDLE_CENTER) {
p1 = &arc->connection.endpoints[0];
p2 = &arc->connection.endpoints[1];
/* special movement, let the center point snap to grid */
} else {
p1 = &arc->middle_handle.pos;
p2 = &arc->connection.endpoints[(handle == (&arc->connection.endpoint_handles[0])) ? 1 : 0];
}
if ( (distance_point_point (to, p1) < 0.01)
|| (distance_point_point (to, p2) < 0.01))
return NULL;
}
if (handle->id == HANDLE_MIDDLE) {
TRACE(printf("curve_dist: %.2f \n",arc->curve_distance));
arc->curve_distance = arc_compute_curve_distance(arc, &arc->connection.endpoints[0], &arc->connection.endpoints[1], to);
TRACE(printf("curve_dist: %.2f \n",arc->curve_distance));
} else if (handle->id == HANDLE_CENTER) {
/* We can move the handle only on the line through center and middle
* Intersecting chord theorem says a*a=b*c
* with a = dist(p1,p2)/2
* b = curve_distance
* c = 2*radius-b or c = r + d
* with Pythagoras r^2 = d^2 + a^2
* d = sqrt(r^2-a^2)
*/
Point p0 = arc->connection.endpoints[0];
Point p1 = arc->connection.endpoints[1];
Point p2 = { (p0.x + p1.x) / 2.0, (p0.y + p1.y) / 2.0 };
real a = distance_point_point (&p0, &p1)/2.0;
real r = ( distance_point_point (&p0, to) + distance_point_point (&p1, to)) / 2.0;
real d = sqrt(r*r-a*a);
real cd;
/* If the new point lies between midpoint and the chords center the angles is >180,
* so c is smaller than r */
if (point_projection_is_between (to, &arc->middle_handle.pos, &p2))
d = -d;
cd = a*a / (r+d);
/* the sign of curve_distance, i.e. if the arc angle is clockwise, does not change */
arc->curve_distance = (arc->curve_distance > 0) ? cd : -cd;
} else {
Point best;
TRACE(printf("Modifiers: %d \n",modifiers));
if (modifiers & MODIFIER_SHIFT)
/* if(arc->end_arrow.type == ARROW_NONE)*/
{
TRACE(printf("SHIFT USED, to at %.2f %.2f ",to->x,to->y));
if (arc_find_radial(arc, to, &best)) {
/* needs to move two handles at the same time
* compute pos of middle handle */
Point midpoint;
int ok;
if (handle == (&arc->connection.endpoint_handles[0]))
ok = arc_compute_midpoint(arc, &best , &arc->connection.endpoints[1], &midpoint);
else
ok = arc_compute_midpoint(arc, &arc->connection.endpoints[0], &best , &midpoint);
if (!ok)
return NULL;
connection_move_handle(&arc->connection, handle->id, &best, cp, reason, modifiers);
connection_adjust_for_autogap(&arc->connection);
/* recompute curve distance equiv. move middle handle */
arc->curve_distance = arc_compute_curve_distance(arc, &arc->connection.endpoints[0], &arc->connection.endpoints[1], &midpoint);
TRACE(printf("curve_dist: %.2f \n",arc->curve_distance));
}
else {
TRACE(printf("NO best\n"));
}
} else {
connection_move_handle(&arc->connection, handle->id, to, cp, reason, modifiers);
connection_adjust_for_autogap(&arc->connection);
}
}
arc_update_data(arc);
return NULL;
}