Pie Chart with ZedGraph

From IronPython Cookbook

For details of the ZedGraph libray see Multi-colored Bar Chart with ZedGraph.

This example creates a Pie chart and saves it to a file.

import clr
clr.AddReference('ZedGraph')
clr.AddReference('System.Drawing')

from ZedGraph import GraphPane
from System.Drawing import Bitmap, Color, Graphics, RectangleF
from System.Drawing.Imaging import ImageFormat

pane = GraphPane(RectangleF(0, 0, 500, 420), "Mood News", "", "")
pane.Border.IsVisible = False
pane.Legend.IsVisible = False

pane.AddPieSlice(101, Color.Green, 0.03, "Good")
pane.AddPieSlice(101, Color.Red, 0.03, "Bad")
pane.AddPieSlice(101, Color.Blue, 0.03, "Neutral")
pane.AddPieSlice(101, Color.Gray, 0.03, "Don't Know")

bm = Bitmap(1, 1)
g = Graphics.FromImage(bm)
pane.AxisChange(g)
pane.GetImage().Save('example.png', ImageFormat.Png)

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