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()));
+
setViewportMargins(LabelMarginWidth, RulerHeight, 0, 0);
setViewport(_viewport);