Columnchart Column Width based on horizontal axis

Question

I've been searching for awhile on  how to do this, but so far I've come up pretty much empty.
I have a column chart with a datetime axis as the horizontal axis, and each data point represents not just a single date but a range of dates (i.e., there is a time_start and time_end value, and I've been plotting using the time_start as my x value). I want the columns to line up with the start and end date rather than being fixed width, so my thought was to write a custom renderer to accomplish this. Unfortunately I don't have any experience with custom renderers, and I haven't found a way to find the size of the horizontal axis in pixels (in fact, I'm not sure how to access the chart object or axis object at all from within the renderer). Any suggestions?

Answer 1

Thanks Niall ... though I've modified your response to FormCalc
It's begun to work though there appears to be a slight glitch.  Only the column cell for Row 1 is showing up.  It would seem that it isn't correctly counting/adding all rows.  Also, when I unselect the checkbox, it isn't re-hiding the column.
My script:
var vRows = Table1._Row1.count
if($=="1")then
var i=0; i<vRows; i++
Table1.Row1[" + i + "].Cell10.presence = "visible"
Table1.Row1[" + i + "].Cell11.presence = "visible"
Table1.Row1[" + i + "].Cell10.relevant = "+print"
Table1.Row1[" + i + "].Cell11.relevant = "+print"
else
var i=0; i<vRows; i++
Table1.Row1[" + i + "].Cell10.presence = "hidden"
Table1.Row1[" + i + "].Cell11.presence = "hidden"
endif
Joanne