static ObjectChange *
constraint_apply_properties(Constraint *constraint)
{
ConstraintDialog *prop_dialog;
char *str;
ObjectState *old_state;
prop_dialog = constraint->properties_dialog;
old_state = (ObjectState *)constraint_get_state(constraint);
/* Read from dialog and put in object: */
g_free(constraint->text);
str = strdup(gtk_entry_get_text(prop_dialog->text));
constraint->text = g_malloc(sizeof(char)*strlen(str)+2+1);
strcpy(constraint->text, "{");
strcat(constraint->text, str);
strcat(constraint->text, "}");
constraint->text_width =
font_string_width(constraint->text, constraint_font,
CONSTRAINT_FONTHEIGHT);
constraint_update_data(constraint);
return new_object_state_change((Object *)constraint, old_state,
(GetStateFunc)constraint_get_state,
(SetStateFunc)constraint_set_state);
}
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 void
constraint_set_props(Constraint *constraint, GPtrArray *props)
{
object_set_props_from_offsets(&constraint->connection.object,
constraint_offsets, props);
g_free(constraint->brtext);
constraint->brtext = NULL;
constraint_update_data(constraint);
}
static DiaObject *
constraint_create(Point *startpoint,
void *user_data,
Handle **handle1,
Handle **handle2)
{
Constraint *constraint;
Connection *conn;
DiaObject *obj;
Point defaultlen = { 1.0, 1.0 };
constraint = g_malloc0(sizeof(Constraint));
/* old defaults */
constraint->font_height = 0.8;
constraint->font =
dia_font_new_from_style (DIA_FONT_MONOSPACE, constraint->font_height);
constraint->line_width = 0.1;
conn = &constraint->connection;
conn->endpoints[0] = *startpoint;
conn->endpoints[1] = *startpoint;
point_add(&conn->endpoints[1], &defaultlen);
obj = &conn->object;
obj->type = &constraint_type;
obj->ops = &constraint_ops;
connection_init(conn, 3, 0);
constraint->text_color = color_black;
constraint->line_color = attributes_get_foreground();
constraint->text = g_strdup("");
constraint->text_pos.x = 0.5*(conn->endpoints[0].x + conn->endpoints[1].x);
constraint->text_pos.y = 0.5*(conn->endpoints[0].y + conn->endpoints[1].y) - 0.2;
constraint->text_handle.id = HANDLE_MOVE_TEXT;
constraint->text_handle.type = HANDLE_MINOR_CONTROL;
constraint->text_handle.connect_type = HANDLE_NONCONNECTABLE;
constraint->text_handle.connected_to = NULL;
obj->handles[2] = &constraint->text_handle;
constraint->brtext = NULL;
constraint_update_data(constraint);
*handle1 = obj->handles[0];
*handle2 = obj->handles[1];
return &constraint->connection.object;
}
static Object *
constraint_create(Point *startpoint,
void *user_data,
Handle **handle1,
Handle **handle2)
{
Constraint *constraint;
Connection *conn;
Object *obj;
Point defaultlen = { 1.0, 1.0 };
if (constraint_font == NULL)
constraint_font = font_getfont("Courier");
constraint = g_malloc(sizeof(Constraint));
conn = &constraint->connection;
conn->endpoints[0] = *startpoint;
conn->endpoints[1] = *startpoint;
point_add(&conn->endpoints[1], &defaultlen);
obj = (Object *) constraint;
obj->type = &constraint_type;
obj->ops = &constraint_ops;
connection_init(conn, 3, 0);
constraint->text = strdup("{}");
constraint->text_width =
font_string_width(constraint->text, constraint_font, CONSTRAINT_FONTHEIGHT);
constraint->text_width = 0.0;
constraint->text_pos.x = 0.5*(conn->endpoints[0].x + conn->endpoints[1].x);
constraint->text_pos.y = 0.5*(conn->endpoints[0].y + conn->endpoints[1].y);
constraint->text_handle.id = HANDLE_MOVE_TEXT;
constraint->text_handle.type = HANDLE_MINOR_CONTROL;
constraint->text_handle.connect_type = HANDLE_NONCONNECTABLE;
constraint->text_handle.connected_to = NULL;
obj->handles[2] = &constraint->text_handle;
constraint->properties_dialog = NULL;
constraint_update_data(constraint);
*handle1 = obj->handles[0];
*handle2 = obj->handles[1];
return (Object *)constraint;
}
static void
constraint_set_state(Constraint *constraint, ConstraintState *state)
{
g_free(constraint->text);
constraint->text = state->text;
constraint->text_width = 0.0;
if (constraint->text != NULL) {
constraint->text_width =
font_string_width(constraint->text, constraint_font, CONSTRAINT_FONTHEIGHT);
}
g_free(state);
constraint_update_data(constraint);
}
static Object *
constraint_load(ObjectNode obj_node, int version, const char *filename)
{
Constraint *constraint;
AttributeNode attr;
Connection *conn;
Object *obj;
if (constraint_font == NULL)
constraint_font = font_getfont("Courier");
constraint = g_malloc(sizeof(Constraint));
conn = &constraint->connection;
obj = (Object *) constraint;
obj->type = &constraint_type;
obj->ops = &constraint_ops;
connection_load(conn, obj_node);
connection_init(conn, 3, 0);
constraint->text = NULL;
attr = object_find_attribute(obj_node, "text");
if (attr != NULL)
constraint->text = data_string(attribute_first_data(attr));
attr = object_find_attribute(obj_node, "text_pos");
if (attr != NULL)
data_point(attribute_first_data(attr), &constraint->text_pos);
constraint->text_width =
font_string_width(constraint->text, constraint_font, CONSTRAINT_FONTHEIGHT);
constraint->text_handle.id = HANDLE_MOVE_TEXT;
constraint->text_handle.type = HANDLE_MINOR_CONTROL;
constraint->text_handle.connect_type = HANDLE_NONCONNECTABLE;
constraint->text_handle.connected_to = NULL;
obj->handles[2] = &constraint->text_handle;
constraint->properties_dialog = NULL;
constraint_update_data(constraint);
return (Object *)constraint;
}
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);
}
