earnedValueChartFiller.initialDateForIndicatorValues();
this.earnedValueChartLegendDatebox = new Datebox(initialDateForIndicatorValues
.toDateTimeAtStartOfDay().toDate());
this.earnedValueChartLegendDatebox.setConstraint(
dateMustBeInsideVisualizationArea(earnedValueChartFiller));
dateHbox.appendChild(this.earnedValueChartLegendDatebox);
appendEventListenerToDateboxIndicators(earnedValueChartFiller, vbox);
vbox.appendChild(dateHbox);
vbox.appendChild(getEarnedValueChartConfigurableLegend(