[Zope] ChartDirector and Zope

[Chris Withers]

Hi Harlow,

You're getting confused because you have a cgi environment.
An externbal method is a "Zope thing" though, it needs to return 
whatever you want Zope to return to the browser...

hpinson at indepthl.com wrote:
> #!/usr/bin/python2.3

You don't need this, this will never be executed as a script.

> def drawBarChart():
> 
>   from pychartdir import *

     from cStringIO imort StringIO
     output = StringIO()
> 
>   #The data for the bar chart
>   data = [85, 156, 179.5, 211, 123]
> 
>   #The labels for the bar chart
>   labels = ["Mon", "Tue", "Wed", "Thu", "Fri"]
> 
>   #Create a XYChart object of size 250 x 250 pixels
>   c = XYChart(250, 250)
> 
>   #Set the plotarea at (30, 20) and of size 200 x 200 pixels
>   c.setPlotArea(30, 20, 200, 200)
> 
>   #Add a bar chart layer using the given data
>   c.addBarLayer(data)
> 
>   #Set the x axis labels using the given labels
>   c.xAxis().setLabels(labels)
> 
>   #output the chart

     print >> output, "Content-type: image/png\n"

>   binaryPrint(c.makeChart2(PNG))

     # you need to get the above to append what it generates to 'output'.

     return output.getvalue()

cheers,

Chris

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