I got an aplicative, which has a chart with several waveforms.
By pressing the mouse right click, a vertical cursor is shown on
screen (which would be a drawLine). This cursor slides horizontally
over the chart. I would like the cursor to show on screen the
coordinates of its intersection with the many waveforms dinamically,
as it slides over the chart. What i have so far is to make it show a
single mark where the mouse is pressed.