static ObjectChange*
bus_move(Bus *bus, Point *to)
{
Point delta;
Point *endpoints = &bus->connection.endpoints[0];
DiaObject *obj = &bus->connection.object;
int i;
delta = *to;
point_sub(&delta, &obj->position);
for (i=0;i<2;i++) {
point_add(&endpoints[i], &delta);
point_add(&bus->real_ends[i], &delta);
}
for (i=0;i<bus->num_handles;i++) {
if (bus->handles[i]->connected_to == NULL) {
point_add(&bus->handles[i]->pos, &delta);
}
}
bus_update_data(bus);
return NULL;
}
static void
bus_set_props(Bus *bus, GPtrArray *props)
{
object_set_props_from_offsets(&bus->connection.object, bus_offsets,
props);
bus_update_data(bus);
}
static DiaObject *
bus_load(ObjectNode obj_node, int version, const char *filename)
{
Bus *bus;
Connection *conn;
LineBBExtras *extra;
DiaObject *obj;
AttributeNode attr;
DataNode data;
int i;
bus = g_malloc0(sizeof(Bus));
conn = &bus->connection;
obj = &conn->object;
extra = &conn->extra_spacing;
obj->type = &bus_type;
obj->ops = &bus_ops;
connection_load(conn, obj_node);
attr = object_find_attribute(obj_node, "bus_handles");
bus->num_handles = 0;
if (attr != NULL)
bus->num_handles = attribute_num_data(attr);
connection_init(conn, 2 + bus->num_handles, 0);
data = attribute_first_data(attr);
bus->handles = g_malloc(sizeof(Handle *)*bus->num_handles);
bus->parallel_points = g_malloc(sizeof(Point)*bus->num_handles);
for (i=0;i<bus->num_handles;i++) {
bus->handles[i] = g_new0(Handle,1);
bus->handles[i]->id = HANDLE_BUS;
bus->handles[i]->type = HANDLE_MINOR_CONTROL;
bus->handles[i]->connect_type = HANDLE_CONNECTABLE_NOBREAK;
bus->handles[i]->connected_to = NULL;
data_point(data, &bus->handles[i]->pos);
obj->handles[2+i] = bus->handles[i];
data = data_next(data);
}
bus->line_color = color_black;
attr = object_find_attribute(obj_node, "line_color");
if (attr != NULL)
data_color(attribute_first_data(attr), &bus->line_color);
extra->start_trans =
extra->end_trans =
extra->start_long =
extra->end_long = LINE_WIDTH/2.0;
bus_update_data(bus);
return &bus->connection.object;
}
static DiaObject *
bus_create(Point *startpoint,
void *user_data,
Handle **handle1,
Handle **handle2)
{
Bus *bus;
Connection *conn;
LineBBExtras *extra;
DiaObject *obj;
Point defaultlen = { 5.0, 0.0 };
int i;
bus = g_malloc0(sizeof(Bus));
conn = &bus->connection;
conn->endpoints[0] = *startpoint;
conn->endpoints[1] = *startpoint;
point_add(&conn->endpoints[1], &defaultlen);
obj = &conn->object;
extra = &conn->extra_spacing;
obj->type = &bus_type;
obj->ops = &bus_ops;
bus->num_handles = DEFAULT_NUMHANDLES;
connection_init(conn, 2+bus->num_handles, 0);
bus->line_color = attributes_get_foreground();
bus->handles = g_malloc(sizeof(Handle *)*bus->num_handles);
bus->parallel_points = g_malloc(sizeof(Point)*bus->num_handles);
for (i=0;i<bus->num_handles;i++) {
bus->handles[i] = g_new0(Handle,1);
bus->handles[i]->id = HANDLE_BUS;
bus->handles[i]->type = HANDLE_MINOR_CONTROL;
bus->handles[i]->connect_type = HANDLE_CONNECTABLE_NOBREAK;
bus->handles[i]->connected_to = NULL;
bus->handles[i]->pos = *startpoint;
bus->handles[i]->pos.x += 5*((real)i+1)/(bus->num_handles+1);
bus->handles[i]->pos.y += (i%2==0)?1.0:-1.0;
obj->handles[2+i] = bus->handles[i];
}
extra->start_trans =
extra->end_trans =
extra->start_long =
extra->end_long = LINE_WIDTH/2.0;
bus_update_data(bus);
*handle1 = obj->handles[0];
*handle2 = obj->handles[1];
return &bus->connection.object;
}
static ObjectChange *
bus_add_handle_callback (DiaObject *obj, Point *clicked, gpointer data)
{
Bus *bus = (Bus *) obj;
Handle *handle;
handle = g_new0(Handle,1);
bus_add_handle(bus, clicked, handle);
bus_update_data(bus);
return bus_create_change(bus, TYPE_ADD_POINT, clicked, handle, NULL);
}
static void
bus_change_apply(struct PointChange *change, DiaObject *obj)
{
change->applied = 1;
switch (change->type) {
case TYPE_ADD_POINT:
bus_add_handle((Bus *)obj, &change->point, change->handle);
break;
case TYPE_REMOVE_POINT:
object_unconnect(obj, change->handle);
bus_remove_handle((Bus *)obj, change->handle);
break;
}
bus_update_data((Bus *)obj);
}
static void
bus_change_revert(struct PointChange *change, DiaObject *obj)
{
switch (change->type) {
case TYPE_ADD_POINT:
bus_remove_handle((Bus *)obj, change->handle);
break;
case TYPE_REMOVE_POINT:
bus_add_handle((Bus *)obj, &change->point, change->handle);
if (change->connected_to) {
object_connect(obj, change->handle, change->connected_to);
}
break;
}
bus_update_data((Bus *)obj);
change->applied = 0;
}
static ObjectChange *
bus_delete_handle_callback (DiaObject *obj, Point *clicked, gpointer data)
{
Bus *bus = (Bus *) obj;
Handle *handle;
int handle_num;
ConnectionPoint *connectionpoint;
Point p;
handle_num = bus_point_near_handle(bus, clicked);
handle = bus->handles[handle_num];
p = handle->pos;
connectionpoint = handle->connected_to;
object_unconnect(obj, handle);
bus_remove_handle(bus, handle );
bus_update_data(bus);
return bus_create_change(bus, TYPE_REMOVE_POINT, &p, handle,
connectionpoint);
}
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;
}
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;
}