+ const shared_ptr<ViewItem> r = get_mouse_over_item(mouse_point_);
+ if (!r)
+ return;
+
+ QMenu *menu = r->create_context_menu(this);
+ if (menu)
+ menu->exec(event->globalPos());
+}
+
+void MarginWidget::keyPressEvent(QKeyEvent *e)
+{
+ assert(e);
+
+ if (e->key() == Qt::Key_Delete)
+ {
+ const auto items = this->items();
+ for (auto &i : items)
+ if (i->selected())
+ i->delete_pressed();
+ }