public void handleItemChanged(TimeStampedDataItem changedItem) {
int index = myInput.getItems().indexOf(changedItem);
if (index < 0) {
return;
}
double currentXValue = myXComponent.getDoubleValue(changedItem);
BackedXYDataItem chartItem = (BackedXYDataItem) mySeries.getDataItem(index);
if (chartItem.getDomainItem() != changedItem) {
int shouldBeAt = myInput.getItems().indexOf(chartItem.getDomainItem());
throw new IllegalStateException(
"domain position for element: "
+ changedItem
+ //
" is "
+ index
+ //
", but chart series contains "
+ chartItem.getDomainItem()
+ //
" which should be at position: "
+ shouldBeAt);
}
if (currentXValue == chartItem.getXValue()) {
mySeries.updateByIndex(index, myYComponent.getDoubleValue(changedItem));
} else {
handleItemDeleted(index, changedItem);
handleItemAdded(index, changedItem);
}
}
private BackedXYDataItem createChartItem(TimeStampedDataItem domainItem) {
double xValue = myXComponent.getDoubleValue(domainItem);
double yValue = myYComponent.getDoubleValue(domainItem);
return new BackedXYDataItem(xValue, yValue, domainItem);
}