[reportlab-users] Specifying chart join axis to intersect pointdoes not draw line below that point

[Stevens, Ian]

Is it possible to do this using a Grid and/or axis ticks?  (ie. make the
grid or ticks start and end at the center point)
 
thanks,
Ian.


________________________________

	From: reportlab-users-bounces at reportlab.com
[mailto:reportlab-users-bounces at reportlab.com] On Behalf Of Stevens, Ian
	Sent: Friday, July 04, 2008 7:50 PM
	To: Support list for users of Reportlab software
	Subject: [reportlab-users] Specifying chart join axis to
intersect pointdoes not draw line below that point
	
	
	I need a chart with 2 points on it, with one of the points
centered on the chart intersected by two lines, one parallel to each
axis.  The result ishould be like a crosshair centered in the chart with
one point at the center of the crosshair. I've accomplished most of what
I need with ScatterPlot:
	 
	    centerPointX = ...
	    centerPointY = ...
	    plot = ScatterPlot()
	    [...]
	    plot.xValueAxis.strokeColor = plot.yValueAxis.strokeColor =
colors.white
	    plot.xValueAxis.joinAxisMode = plot.yValueAxis.joinAxisMode
= 'value'
	    plot.xValueAxis.joinAxisPos = centerPointY
	    plot.yValueAxis.joinAxisPos = centerPointX
	 
	This produces a white axis centered on the point, but the lower
half of the y-axis beneath the point is missing.  How can I get the
y-axis to descend to the bottom of the chart?
	 
	Also, any suggestions as to how I can force the chart to center
itself around the given point?
	 
	thanks,
	Ian.

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