static ObjectChange*
message_move_handle(Message *message, Handle *handle,
Point *to, ConnectionPoint *cp,
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, cp, reason, modifiers);
connection_adjust_for_autogap(&message->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(&message->text_pos, &p2);
}
message_update_data(message);
return NULL;
}
double distance_ellipse_point(const Point *centre,
double width,
double height,
double line_width,
const Point *point)
{
double w2 = width * width;
double h2 = height * height;
double scale;
double rad;
double dist;
Point pt = *point;
point_sub(&pt, centre);
pt.setX( pt.x() * pt.x() );
pt.setY( pt.y() * pt.y() );
scale = w2 * h2 / ( 4 * h2 * pt.x() + 4 * w2 * pt.y() );
rad = sqrt( ( pt.x() + pt.y() ) * scale ) + line_width / 2;
dist = sqrt( pt.x() + pt.y() );
if (dist <= rad)
return 0.0;
return dist - rad;
}
static real
arc_distance_from(Arc *arc, Point *point)
{
Point *endpoints;
Point from_center;
real angle;
real d, d2;
endpoints = &arc->connection.endpoints[0];
if (arc_is_line (arc))
return distance_line_point (&endpoints[0], &endpoints[1],
arc->line_width, point);
from_center = *point;
point_sub(&from_center, &arc->center);
angle = -atan2(from_center.y, from_center.x)*180.0/M_PI;
if (angle<0)
angle+=360.0;
if (in_angle(angle, arc->angle1, arc->angle2)) {
d = fabs(sqrt(point_dot(&from_center, &from_center)) - arc->radius);
d -= arc->line_width/2.0;
if (d<0)
d = 0.0;
return d;
} else {
d = distance_point_point(&endpoints[0], point);
d2 = distance_point_point(&endpoints[1], point);
return MIN(d,d2);
}
}
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
zigzagline_update_data(Zigzagline *zigzagline)
{
OrthConn *orth = &zigzagline->orth;
DiaObject *obj = &orth->object;
PolyBBExtras *extra = &orth->extra_spacing;
orthconn_update_data(&zigzagline->orth);
extra->start_long =
extra->end_long =
extra->middle_trans =
extra->start_trans =
extra->end_trans = (zigzagline->line_width / 2.0);
orthconn_update_boundingbox(orth);
if (zigzagline->start_arrow.type != ARROW_NONE) {
Rectangle bbox;
Point move_arrow, move_line;
Point to = orth->points[0];
Point from = orth->points[1];
calculate_arrow_point(&zigzagline->start_arrow, &to, &from,
&move_arrow, &move_line, zigzagline->line_width);
/* move them */
point_sub(&to, &move_arrow);
point_sub(&from, &move_line);
arrow_bbox (&zigzagline->start_arrow, zigzagline->line_width, &to, &from, &bbox);
rectangle_union (&obj->bounding_box, &bbox);
}
if (zigzagline->end_arrow.type != ARROW_NONE) {
Rectangle bbox;
Point move_arrow, move_line;
int n = orth->numpoints;
Point to = orth->points[n-1];
Point from = orth->points[n-2];
calculate_arrow_point(&zigzagline->end_arrow, &to, &from,
&move_arrow, &move_line, zigzagline->line_width);
/* move them */
point_sub(&to, &move_arrow);
point_sub(&from, &move_line);
arrow_bbox (&zigzagline->end_arrow, zigzagline->line_width, &to, &from, &bbox);
rectangle_union (&obj->bounding_box, &bbox);
}
}
static void
modify_button_press(ModifyTool *tool, GdkEventButton *event,
DDisplay *ddisp)
{
Point clickedpoint;
DiaObject *clicked_obj;
gboolean some_selected;
ddisplay_untransform_coords(ddisp,
(int)event->x, (int)event->y,
&clickedpoint.x, &clickedpoint.y);
/* don't got to single handle movement if there is more than one object selected */
some_selected = g_list_length (ddisp->diagram->data->selected) > 1;
if (!some_selected && do_if_clicked_handle(ddisp, tool, &clickedpoint, event))
return;
clicked_obj = click_select_object(ddisp, &clickedpoint, event);
if (!some_selected && do_if_clicked_handle(ddisp, tool, &clickedpoint, event))
return;
if ( clicked_obj != NULL ) {
tool->state = STATE_MOVE_OBJECT;
tool->object = clicked_obj;
tool->move_compensate = clicked_obj->position;
point_sub(&tool->move_compensate, &clickedpoint);
tool->break_connections = TRUE; /* unconnect when not grabbing handles, just setting to
* FALSE is not enough. Need to refine the move op, too. */
gdk_pointer_grab (gtk_widget_get_window(ddisp->canvas), FALSE,
GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON1_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
NULL, NULL, event->time);
tool->start_at = clickedpoint;
tool->start_time = time_micro();
ddisplay_set_all_cursor(get_cursor(CURSOR_SCROLL));
} else {
tool->state = STATE_BOX_SELECT;
tool->start_box = clickedpoint;
tool->end_box = clickedpoint;
tool->x1 = tool->x2 = (int) event->x;
tool->y1 = tool->y2 = (int) event->y;
if (tool->gc == NULL) {
tool->gc = gdk_gc_new(gtk_widget_get_window(ddisp->canvas));
gdk_gc_set_line_attributes(tool->gc, 1, GDK_LINE_ON_OFF_DASH,
GDK_CAP_BUTT, GDK_JOIN_MITER);
gdk_gc_set_foreground(tool->gc, &color_gdk_white);
gdk_gc_set_function(tool->gc, GDK_XOR);
}
gdk_draw_rectangle (gtk_widget_get_window (ddisp->canvas), tool->gc, FALSE,
tool->x1, tool->y1,
tool->x2 - tool->x1, tool->y2 - tool->y1);
gdk_pointer_grab (gtk_widget_get_window (ddisp->canvas), FALSE,
GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON1_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
NULL, NULL, event->time);
}
}
/*
* This function estimates the distance from a point to a line segment
* specified by two endpoints.
* If the point is on the line segment, 0.0 is returned. Otherwise the
* distance in the R^2 metric from the point to the nearest point
* on the line segment is returned. Does one sqrt per call.
* Philosophical bug: line_width is ignored iff point is beyond
* end of line segment.
*/
real
distance_line_point(Point *line_start, Point *line_end,
real line_width, Point *point)
{
Point v1, v2;
real v1_lensq;
real projlen;
real perp_dist;
v1 = *line_end;
point_sub(&v1,line_start);
v2 = *point;
point_sub(&v2, line_start);
v1_lensq = point_dot(&v1,&v1);
if (v1_lensq<0.000001) {
return sqrt(point_dot(&v2,&v2));
}
projlen = point_dot(&v1,&v2) / v1_lensq;
if (projlen<0.0) {
return sqrt(point_dot(&v2,&v2));
}
if (projlen>1.0) {
Point v3 = *point;
point_sub(&v3,line_end);
return sqrt(point_dot(&v3,&v3));
}
point_scale(&v1, projlen);
point_sub(&v1, &v2);
perp_dist = sqrt(point_dot(&v1,&v1));
perp_dist -= line_width / 2.0;
if (perp_dist < 0.0) {
perp_dist = 0.0;
}
return perp_dist;
}
static void
implements_update_data(Implements *implements)
{
Connection *conn = &implements->connection;
Object *obj = (Object *) implements;
Point delta;
Point point;
real len;
Rectangle rect;
obj->position = conn->endpoints[0];
implements->text_handle.pos = implements->text_pos;
/* circle handle/center pos: */
delta = conn->endpoints[0];
point_sub(&delta, &conn->endpoints[1]);
len = sqrt(point_dot(&delta, &delta));
delta.x /= len; delta.y /= len;
point = delta;
point_scale(&point, implements->circle_diameter);
point_add(&point, &conn->endpoints[1]);
implements->circle_handle.pos = point;
point = delta;
point_scale(&point, implements->circle_diameter/2.0);
point_add(&point, &conn->endpoints[1]);
implements->circle_center = point;
connection_update_handles(conn);
/* Boundingbox: */
connection_update_boundingbox(conn);
/* Add boundingbox for circle: */
rect.left = implements->circle_center.x - implements->circle_diameter/2.0;
rect.right = implements->circle_center.x + implements->circle_diameter/2.0;
rect.top = implements->circle_center.y - implements->circle_diameter/2.0;
rect.bottom = implements->circle_center.y + implements->circle_diameter/2.0;
rectangle_union(&obj->bounding_box, &rect);
/* Add boundingbox for text: */
rect.left = implements->text_pos.x;
rect.right = rect.left + implements->text_width;
rect.top = implements->text_pos.y - font_ascent(implements_font, IMPLEMENTS_FONTHEIGHT);
rect.bottom = rect.top + IMPLEMENTS_FONTHEIGHT;
rectangle_union(&obj->bounding_box, &rect);
/* fix boundingbox for implements_width: */
obj->bounding_box.top -= IMPLEMENTS_WIDTH/2;
obj->bounding_box.left -= IMPLEMENTS_WIDTH/2;
obj->bounding_box.bottom += IMPLEMENTS_WIDTH/2;
obj->bounding_box.right += IMPLEMENTS_WIDTH/2;
}
static void draw_tunnel(DiaRenderer *renderer,
Point *end, Point *vect, Color *col)
{
DiaRendererClass *renderer_ops = DIA_RENDERER_GET_CLASS (renderer);
Point vv,vp,vt1,vt2;
BezPoint curve1[2];
BezPoint curve2[2];
real vlen;
vv = *end;
point_sub(&vv,vect);
vlen = distance_point_point(vect,end);
if (vlen < 1E-7) return;
point_scale(&vv,1/vlen);
vp.y = vv.x;
vp.x = -vv.y;
curve1[0].type = curve2[0].type = BEZ_MOVE_TO;
curve1[0].p1 = curve2[0].p1 = *end;
vt1 = vv;
point_scale(&vt1,-ARROW_PARENS_LOFFSET - (.5*ARROW_PARENS_LENGTH));
point_add(&curve1[0].p1,&vt1); point_add(&curve2[0].p1,&vt1);
/* gcc, work for me, please. */
vt2 = vp;
point_scale(&vt2,ARROW_PARENS_WOFFSET);
point_add(&curve1[0].p1,&vt2); point_sub(&curve2[0].p1,&vt2);
vt2 = vp;
vt1 = vv;
point_scale(&vt1,2.0*ARROW_PARENS_LENGTH / 6.0);
point_scale(&vt2,ARROW_PARENS_LENGTH / 6.0);
curve1[1].type = curve2[1].type = BEZ_CURVE_TO;
curve1[1].p1 = curve1[0].p1; curve2[1].p1 = curve2[0].p1;
point_add(&curve1[1].p1,&vt1); point_add(&curve2[1].p1,&vt1);
point_add(&curve1[1].p1,&vt2); point_sub(&curve2[1].p1,&vt2);
curve1[1].p2 = curve1[1].p1; curve2[1].p2 = curve2[1].p1;
point_add(&curve1[1].p2,&vt1); point_add(&curve2[1].p2,&vt1);
curve1[1].p3 = curve1[1].p2; curve2[1].p3 = curve2[1].p2;
point_add(&curve1[1].p3,&vt1); point_add(&curve2[1].p3,&vt1);
point_sub(&curve1[1].p3,&vt2); point_add(&curve2[1].p3,&vt2);
renderer_ops->draw_bezier(renderer,curve1,2,col);
renderer_ops->draw_bezier(renderer,curve2,2,col);
}
void find4thPoint(vector<float>& p4,
vector<float>& p1, vector<float>& p2, vector<float>& p3,
float dist, float ang, float dihed) {
vector<float> n1(3), n2(3), a(3), b(3);
point_sub(a, p1,p2); point_sub(b, p3,p2);
cross_product(n1, a,b); normalize_point(n1,n1);
cross_product(n2, b,n1); normalize_point(n2,n2);
double Sang = sin( DEGREES_TO_RADIANS(ang) );
double Cang = cos( DEGREES_TO_RADIANS(ang) );
double Sdihed = sin( DEGREES_TO_RADIANS(dihed) );
double Cdihed = cos( DEGREES_TO_RADIANS(dihed) );
normalize_point(b,b);
//cout << point_string(b) << point_string(n1) << point_string(n2) << endl;
linear_combination(p4, Sang*Cdihed, n2, -1*Cang, b);
linear_combination(p4, -1*Sang*Sdihed, n1, 1, p4);
//cout << point_string(p4) << endl;
linear_combination(p4, dist, p4, 1, p3);
}
static real
arc_compute_curve_distance(const Arc *arc, const Point *start, const Point *end, const Point *mid)
{
Point a,b;
real tmp,cd;
b = *mid;
point_sub(&b, start);
a = *end;
point_sub(&a, start);
tmp = point_dot(&a,&b);
cd =
sqrt(fabs(point_dot(&b,&b) - tmp*tmp/point_dot(&a,&a)));
if (a.x*b.y - a.y*b.x < 0)
cd = - cd;
return cd;
}
static void
constraint_move(Constraint *constraint, Point *to)
{
Point start_to_end;
Point *endpoints = &constraint->connection.endpoints[0];
Point delta;
delta = *to;
point_sub(&delta, &endpoints[0]);
start_to_end = endpoints[1];
point_sub(&start_to_end, &endpoints[0]);
endpoints[1] = endpoints[0] = *to;
point_add(&endpoints[1], &start_to_end);
point_add(&constraint->text_pos, &delta);
constraint_update_data(constraint);
}
static void
message_move(Message *message, Point *to)
{
Point start_to_end;
Point *endpoints = &message->connection.endpoints[0];
Point delta;
delta = *to;
point_sub(&delta, &endpoints[0]);
start_to_end = endpoints[1];
point_sub(&start_to_end, &endpoints[0]);
endpoints[1] = endpoints[0] = *to;
point_add(&endpoints[1], &start_to_end);
point_add(&message->text_pos, &delta);
message_update_data(message);
}
static ObjectChange*
lifeline_move(Lifeline *lifeline, Point *to)
{
Point start_to_end;
Point delta;
Point *endpoints = &lifeline->connection.endpoints[0];
delta = *to;
point_sub(&delta, &endpoints[0]);
start_to_end = endpoints[1];
point_sub(&start_to_end, &endpoints[0]);
endpoints[1] = endpoints[0] = *to;
point_add(&endpoints[1], &start_to_end);
lifeline_update_data(lifeline);
return NULL;
}
static void
modify_button_press(ModifyTool *tool, GdkEventButton *event,
DDisplay *ddisp)
{
Point clickedpoint;
DiaObject *clicked_obj;
gboolean some_selected;
ddisplay_untransform_coords(ddisp,
(int)event->x, (int)event->y,
&clickedpoint.x, &clickedpoint.y);
/* don't got to single handle movement if there is more than one object selected */
some_selected = g_list_length (ddisp->diagram->data->selected) > 1;
if (!some_selected && do_if_clicked_handle(ddisp, tool, &clickedpoint, event))
return;
clicked_obj = click_select_object(ddisp, &clickedpoint, event);
if (!some_selected && do_if_clicked_handle(ddisp, tool, &clickedpoint, event))
return;
if ( clicked_obj != NULL ) {
tool->state = STATE_MOVE_OBJECT;
tool->object = clicked_obj;
tool->move_compensate = clicked_obj->position;
point_sub(&tool->move_compensate, &clickedpoint);
tool->break_connections = TRUE; /* unconnect when not grabbing handles, just setting to
* FALSE is not enough. Need to refine the move op, too. */
gdk_pointer_grab (gtk_widget_get_window(ddisp->canvas), FALSE,
GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON1_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
NULL, NULL, event->time);
tool->start_at = clickedpoint;
tool->start_time = time_micro();
ddisplay_set_all_cursor_name (NULL, "move");
} else {
tool->state = STATE_BOX_SELECT;
tool->start_box = clickedpoint;
tool->end_box = clickedpoint;
tool->x1 = tool->x2 = (int) event->x;
tool->y1 = tool->y2 = (int) event->y;
dia_interactive_renderer_set_selection (ddisp->renderer,
TRUE,
tool->x1,
tool->y1,
tool->x2 - tool->x1,
tool->y2 - tool->y1);
ddisplay_flush (ddisp);
gdk_pointer_grab (gtk_widget_get_window (ddisp->canvas), FALSE,
GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON1_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
NULL, NULL, event->time);
}
}
static void
implements_move(Implements *implements, Point *to)
{
Point start_to_end;
Point delta;
Point *endpoints = &implements->connection.endpoints[0];
delta = *to;
point_sub(&delta, &endpoints[0]);
start_to_end = endpoints[1];
point_sub(&start_to_end, &endpoints[0]);
endpoints[1] = endpoints[0] = *to;
point_add(&endpoints[1], &start_to_end);
point_add(&implements->text_pos, &delta);
implements_update_data(implements);
}
static ObjectChange*
mbr_move(Mbr *mbr, Point *to)
{
Point start_to_end;
Point *endpoints = &mbr->connection.endpoints[0];
Point delta;
delta = *to;
point_sub(&delta, &endpoints[0]);
start_to_end = endpoints[1];
point_sub(&start_to_end, &endpoints[0]);
endpoints[1] = endpoints[0] = *to;
point_add(&endpoints[1], &start_to_end);
point_add(&mbr->pm, &delta);
mbr_update_data(mbr);
return NULL;
}
static ObjectChange*
link_move(Link *link, Point *to)
{
Point start_to_end;
Point *endpoints = &link->connection.endpoints[0];
Point delta;
delta = *to;
point_sub(&delta, &endpoints[0]);
start_to_end = endpoints[1];
point_sub(&start_to_end, &endpoints[0]);
endpoints[1] = endpoints[0] = *to;
point_add(&endpoints[1], &start_to_end);
point_add(&link->pm, &delta);
link_update_data(link);
return NULL;
}
static ObjectChange*
transition_move_handle(Transition* transition,
Handle* handle,
Point* newpos,
ConnectionPoint* cp,
HandleMoveReason reason,
ModifierKeys modifiers)
{
ObjectChange *change = NULL;
assert(transition != NULL);
assert(handle != NULL);
assert(newpos != NULL);
switch (handle->id)
{
case HANDLE_MOVE_TRIGGER_TEXT:
/* The trigger text is being moved */
transition->trigger_text_pos = *newpos;
break;
case HANDLE_MOVE_GUARD_TEXT:
/* The guard text is being moved */
transition->guard_text_pos = *newpos;
break;
default:
{
int n = transition->orth.numpoints/2;
Point p1, p2;
p1.x = 0.5 * (transition->orth.points[n-1].x + transition->orth.points[n].x);
p1.y = 0.5 * (transition->orth.points[n-1].y + transition->orth.points[n].y);
/* Tell the connection that one of its handles is being moved */
orthconn_move_handle(&transition->orth, handle, newpos, cp, reason, modifiers);
/* with auto-routing the number of points may have changed */
n = transition->orth.numpoints/2;
p2.x = 0.5 * (transition->orth.points[n-1].x + transition->orth.points[n].x);
p2.y = 0.5 * (transition->orth.points[n-1].y + transition->orth.points[n].y);
point_sub(&p2, &p1);
point_add(&transition->trigger_text_pos, &p2);
point_add(&transition->guard_text_pos, &p2);
}
break;
}
/* Update ourselves to reflect the new handle position */
uml_transition_update_data(transition);
return change;
}
/** Scroll display to have the diagram point p at the center.
* Returns TRUE if anything changed. */
gboolean
ddisplay_scroll_center_point(DDisplay *ddisp, Point *p)
{
Point center;
g_return_val_if_fail (ddisp != NULL, FALSE);
/* Find current center */
center.x = (ddisp->visible.right+ddisp->visible.left)/2;
center.y = (ddisp->visible.top+ddisp->visible.bottom)/2;
point_sub(p, ¢er);
return ddisplay_scroll(ddisp, p);
}
/* finds the point intersecting the full circle
* on the vector defined by the center and Point *to
* that point is returned in Point *best if 1 is returned */
static int
arc_find_radial(const Arc *arc, const Point *to, Point *best)
{
Point tmp;
tmp = *to;
point_sub(&tmp, &arc->center);
point_normalize(&tmp);
point_scale(&tmp,arc->radius);
point_add(&tmp, &arc->center);
*best = tmp;
return 1;
}
static void
rendobj_move(RenderObject *rend_obj, Point *to)
{
Point p;
p = rend_obj->desc->move_position;
rend_obj->element.corner = *to;
point_scale(&p, rend_obj->magnify);
point_sub(&rend_obj->element.corner,
&p);
rendobj_update_data(rend_obj);
}
static ObjectChange*
annotation_move(Annotation *annotation, Point *to)
{
Point start_to_end;
Point *endpoints = &annotation->connection.endpoints[0];
Point delta;
delta = *to;
point_sub(&delta, &endpoints[0]);
start_to_end = endpoints[1];
point_sub(&start_to_end, &endpoints[0]);
endpoints[1] = endpoints[0] = *to;
point_add(&endpoints[1], &start_to_end);
point_add(&annotation->text->position, &delta);
annotation_update_data(annotation);
return NULL;
}
static ObjectChange*
step_move(Step *step, Point *to)
{
Point delta = *to;
point_sub(&delta,&step->element.corner);
step->element.corner = *to;
point_add(&step->north.pos,&delta);
point_add(&step->south.pos,&delta);
step_update_data(step);
return NULL;
}
static ObjectChange*
flow_move(Flow *flow, Point *to)
{
Point start_to_end;
Point *endpoints = &flow->connection.endpoints[0];
Point delta;
delta = *to;
point_sub(&delta, &endpoints[0]);
start_to_end = endpoints[1];
point_sub(&start_to_end, &endpoints[0]);
endpoints[1] = endpoints[0] = *to;
point_add(&endpoints[1], &start_to_end);
point_add(&flow->textpos, &delta);
flow_update_data(flow);
return NULL;
}
/** rotates p around the center by an angle given in radians
* a positive angle is ccw on the screen*/
static void
rotate_point_around_point(Point *p, const Point *center, real angle)
{
real radius;
real a;
point_sub(p,center);
radius = point_len(p);
a = -atan2(p->y,p->x); /* y axis points down*/
a += angle;
p->x = cos(a); p->y = -sin(a);/* y axis points down*/
point_scale(p,radius);
point_add(p,center);
}
static void
line_move(Line *line, Point *to)
{
Point start_to_end;
Point *endpoints = &line->connection.endpoints[0];
start_to_end = endpoints[1];
point_sub(&start_to_end, &endpoints[0]);
endpoints[1] = endpoints[0] = *to;
point_add(&endpoints[1], &start_to_end);
line_update_data(line);
}
static void
arc_move(Arc *arc, Point *to)
{
Point start_to_end;
Point *endpoints = &arc->connection.endpoints[0];
start_to_end = endpoints[1];
point_sub(&start_to_end, &endpoints[0]);
endpoints[1] = endpoints[0] = *to;
point_add(&endpoints[1], &start_to_end);
arc_update_data(arc);
}
void
polyconn_move(PolyConn *poly, Point *to)
{
Point p;
int i;
p = *to;
point_sub(&p, &poly->points[0]);
poly->points[0] = *to;
for (i=1;i<poly->numpoints;i++) {
point_add(&poly->points[i], &p);
}
}
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;
}