I have two different classes that extend ChartElement. Both
are listening for a mouse down event and both work when applied to
a chart. However, if I apply both to a chart then only one of them
hears the mouse down event. Any ideas why this might be?
As shown in an example somewhere I have overridden the
updateDisplayList function so that it draws a clear rectangle the
size of the chart in order to be able to catch mouse events. Could
it be something to do with that?