PyChartDirector中文教程[6]：多深度饼图

May 10	PyChartDirector中文教程[6]：多深度饼图
	Categories: Python \| Tags: ChartDirector, Python \| Views: 2,538

我们扩展了一下开始画的简单的饼图, 那还能不能再扩展一下呢,

能否画出不同尝试的3D效果呢?

我们看看这个效果图:

在这个例子中, 不再使用PieChart.set3D来画3D效果, 而是通过PieChart.set3D2来画图.

通过一个整数数组来指定不同区域的高度.

源代码如下:

#!/usr/bin/python
from pychartdir import *
 
# The data for the pie chart
data = [72, 18, 15, 12]
 
# The labels for the pie chart
labels = ["Labor", "Machinery", "Facilities", "Computers"]
 
# The depths for the sectors
depths = [30, 20, 10, 10]
 
# Create a PieChart object of size 360 x 300 pixels, with a light blue (DDDDFF)
# background and a 1 pixel 3D border
c = PieChart(360, 300, 0xddddff, -1, 1)
 
# Set the center of the pie at (180, 175) and the radius to 100 pixels
c.setPieSize(180, 175, 100)
 
# Add a title box using 15 pts Times Bold Italic font and blue (AAAAFF) as background
# color
c.addTitle("Project Cost Breakdown", "timesbi.ttf", 15).setBackground(0xaaaaff)
 
# Set the pie data and the pie labels
c.setData(data, labels)
 
# Draw the pie in 3D with variable 3D depths, 指定不同区域的高度
c.set3D2(depths)
 
# Set the start angle to 225 degrees may improve layout when the depths of the sector
# are sorted in descending order, because it ensures the tallest sector is at the
# back.
c.setStartAngle(225)
 
# Output the chart
c.makeChart("multidepthpie.png")