void GraphEdit::_connections_layer_draw() {
Color activity_color = get_color("activity");
//draw connections
List<List<Connection>::Element *> to_erase;
for (List<Connection>::Element *E = connections.front(); E; E = E->next()) {
NodePath fromnp(E->get().from);
Node *from = get_node(fromnp);
if (!from) {
to_erase.push_back(E);
continue;
}
GraphNode *gfrom = Object::cast_to<GraphNode>(from);
if (!gfrom) {
to_erase.push_back(E);
continue;
}
NodePath tonp(E->get().to);
Node *to = get_node(tonp);
if (!to) {
to_erase.push_back(E);
continue;
}
GraphNode *gto = Object::cast_to<GraphNode>(to);
if (!gto) {
to_erase.push_back(E);
continue;
}
Vector2 frompos = gfrom->get_connection_output_position(E->get().from_port) + gfrom->get_offset() * zoom;
Color color = gfrom->get_connection_output_color(E->get().from_port);
Vector2 topos = gto->get_connection_input_position(E->get().to_port) + gto->get_offset() * zoom;
Color tocolor = gto->get_connection_input_color(E->get().to_port);
if (E->get().activity > 0) {
color = color.linear_interpolate(activity_color, E->get().activity);
tocolor = tocolor.linear_interpolate(activity_color, E->get().activity);
}
_draw_cos_line(connections_layer, frompos, topos, color, tocolor);
}
while (to_erase.size()) {
connections.erase(to_erase.front()->get());
to_erase.pop_front();
}
}
void GraphEdit::_update_scroll() {
if (updating)
return;
updating = true;
set_block_minimum_size_adjust(true);
Rect2 screen;
for (int i = 0; i < get_child_count(); i++) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn)
continue;
Rect2 r;
r.position = gn->get_offset() * zoom;
r.size = gn->get_size() * zoom;
screen = screen.merge(r);
}
screen.position -= get_size();
screen.size += get_size() * 2.0;
h_scroll->set_min(screen.position.x);
h_scroll->set_max(screen.position.x + screen.size.x);
h_scroll->set_page(get_size().x);
if (h_scroll->get_max() - h_scroll->get_min() <= h_scroll->get_page())
h_scroll->hide();
else
h_scroll->show();
v_scroll->set_min(screen.position.y);
v_scroll->set_max(screen.position.y + screen.size.y);
v_scroll->set_page(get_size().y);
if (v_scroll->get_max() - v_scroll->get_min() <= v_scroll->get_page())
v_scroll->hide();
else
v_scroll->show();
set_block_minimum_size_adjust(false);
if (!awaiting_scroll_offset_update) {
call_deferred("_update_scroll_offset");
awaiting_scroll_offset_update = true;
}
updating = false;
}
void GraphEdit::_update_scroll_offset() {
set_block_minimum_size_adjust(true);
for (int i = 0; i < get_child_count(); i++) {
GraphNode *gn = Object::cast_to<GraphNode>(get_child(i));
if (!gn)
continue;
Point2 pos = gn->get_offset() * zoom;
pos -= Point2(h_scroll->get_value(), v_scroll->get_value());
gn->set_position(pos);
if (gn->get_scale() != Vector2(zoom, zoom)) {
gn->set_scale(Vector2(zoom, zoom));
}
}
connections_layer->set_position(-Point2(h_scroll->get_value(), v_scroll->get_value()));
set_block_minimum_size_adjust(false);
awaiting_scroll_offset_update = false;
}