+ connect(_header, SIGNAL(selection_changed()),
+ _ruler, SLOT(clear_selection()));
+ connect(_ruler, SIGNAL(selection_changed()),
+ _header, SLOT(clear_selection()));
+
+ connect(_header, SIGNAL(selection_changed()),
+ this, SIGNAL(selection_changed()));
+ connect(_ruler, SIGNAL(selection_changed()),
+ this, SIGNAL(selection_changed()));
+