+ assert(view);
+ _view = view;
+}
+
+void Trace::paint_back(QPainter &p, int left, int right)
+{
+ (void)p;
+ (void)left;
+ (void)right;
+}
+
+void Trace::paint_mid(QPainter &p, int left, int right)
+{
+ (void)p;
+ (void)left;
+ (void)right;
+}
+
+void Trace::paint_fore(QPainter &p, int left, int right)
+{
+ (void)p;
+ (void)left;
+ (void)right;
+}
+
+void Trace::paint_label(QPainter &p, int right, bool hover)
+{
+ assert(_view);
+ const int y = _v_offset - _view->v_offset();
+