+QMenu* Signal::create_context_menu(QWidget *parent)
+{
+ QMenu *const menu = Trace::create_context_menu(parent);
+
+ menu->addSeparator();
+
+ QAction *const disable = new QAction(tr("Disable"), this);
+ disable->setShortcuts(QKeySequence::Delete);
+ connect(disable, SIGNAL(triggered()), this, SLOT(on_disable()));
+ menu->addAction(disable);
+
+ return menu;
+}
+
+void Signal::delete_pressed()
+{
+ on_disable();
+}
+
+void Signal::on_disable()
+{
+ enable(false);
+}
+