ChartDirector Ver 4.1 (Python Edition)

Coloring and Wallpaper


      

This example demonstrates different coloring schemes and background effects.

This example demonstrates how to modify the coloring scheme using BaseChart.setColor, BaseChart.setColors and BaseChart.setColors2, and apply a background image to the chart using BaseChart.setWallpaper.

Source Code Listing

[Standalone Version] pythondemo\colorpie.py
#!/usr/bin/python
from pychartdir import *

def createChart(img) :

    # The data for the pie chart
    data = [25, 18, 15, 12, 8, 30, 35]

    # The labels for the pie chart
    labels = ["Labor", "Licenses", "Taxes", "Legal", "Insurance", "Facilities",
        "Production"]

    # Colors of the sectors if custom coloring is used
    colors = [0xb8bc9c, 0xecf0b9, 0x999966, 0x333366, 0xc3c3e6, 0x594330, 0xa0bdc4]

    # Create a PieChart object of size 280 x 240 pixels
    c = PieChart(280, 240)

    # Set the center of the pie at (140, 120) and the radius to 80 pixels
    c.setPieSize(140, 120, 80)

    # Draw the pie in 3D
    c.set3D()

    # Set the coloring schema
    if img == "0" :
        c.addTitle("Custom Colors")
        # set the LineColor to light gray
        c.setColor(LineColor, 0xc0c0c0)
        # use given color array as the data colors (sector colors)
        c.setColors2(DataColor, colors)
    elif img == "1" :
        c.addTitle("Dark Background Colors")
        # use the standard white on black palette
        c.setColors(whiteOnBlackPalette)
    elif img == "2" :
        c.addTitle("Wallpaper As Background")
        c.setWallpaper("bg.png")
    else :
        c.addTitle("Transparent Colors")
        c.setWallpaper("bg.png")
        # use semi-transparent colors to allow the background to be seen
        c.setColors(transparentPalette)

    # Set the pie data and the pie labels
    c.setData(data, labels)

    # Explode the 1st sector (index = 0)
    c.setExplode(0)

    # output the chart
    c.makeChart("colorpie%s.gif" % img)


createChart("0")
createChart("1")
createChart("2")
createChart("3")

[CGI Version] pythondemo_cgi\colorpie.py
#!/usr/bin/python
from pychartdir import *
import cgi, os

# Get HTTP query parameters
query = cgi.FieldStorage()

# The data for the pie chart
data = [25, 18, 15, 12, 8, 30, 35]

# The labels for the pie chart
labels = ["Labor", "Licenses", "Taxes", "Legal", "Insurance", "Facilities",
    "Production"]

# Colors of the sectors if custom coloring is used
colors = [0xb8bc9c, 0xecf0b9, 0x999966, 0x333366, 0xc3c3e6, 0x594330, 0xa0bdc4]

# Create a PieChart object of size 280 x 240 pixels
c = PieChart(280, 240)

# Set the center of the pie at (140, 120) and the radius to 80 pixels
c.setPieSize(140, 120, 80)

# Draw the pie in 3D
c.set3D()

# Set the coloring schema
if query["img"].value == "0" :
    c.addTitle("Custom Colors")
    # set the LineColor to light gray
    c.setColor(LineColor, 0xc0c0c0)
    # use given color array as the data colors (sector colors)
    c.setColors2(DataColor, colors)
elif query["img"].value == "1" :
    c.addTitle("Dark Background Colors")
    # use the standard white on black palette
    c.setColors(whiteOnBlackPalette)
elif query["img"].value == "2" :
    c.addTitle("Wallpaper As Background")
    c.setWallpaper(os.path.join(os.path.dirname(sys.argv[0]), "bg.png"))
else :
    c.addTitle("Transparent Colors")
    c.setWallpaper(os.path.join(os.path.dirname(sys.argv[0]), "bg.png"))
    # use semi-transparent colors to allow the background to be seen
    c.setColors(transparentPalette)

# Set the pie data and the pie labels
c.setData(data, labels)

# Explode the 1st sector (index = 0)
c.setExplode(0)

# output the chart
print "Content-type: image/gif\n"
binaryPrint(c.makeChart2(GIF))