ChartDirector Ver 5.0 (Python Edition)

Simple Gantt Chart




This example demonstrates a simple gantt chart.

This chart is created by using a horizontal box-whisker layer, in which only the "box" part of the box-whisker layer is used. Date/time values are used as box data, resulting in a gantt chart.

The key features demonstrated in this example are:

Source Code Listing

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

# data for the gantt chart, representing the start date, end date and names for
# various activities
startDate = [chartTime(2004, 8, 16), chartTime(2004, 8, 30), chartTime(2004, 9, 13),
    chartTime(2004, 9, 20), chartTime(2004, 9, 27), chartTime(2004, 10, 4),
    chartTime(2004, 10, 25), chartTime(2004, 11, 1), chartTime(2004, 11, 8)]
endDate = [chartTime(2004, 8, 30), chartTime(2004, 9, 13), chartTime(2004, 9, 27),
    chartTime(2004, 10, 4), chartTime(2004, 10, 11), chartTime(2004, 11, 8),
    chartTime(2004, 11, 8), chartTime(2004, 11, 22), chartTime(2004, 11, 22)]
labels = ["Market Research", "Define Specifications", "Overall Archiecture",
    "Project Planning", "Detail Design", "Software Development", "Test Plan",
    "Testing and QA", "User Documentation"]

# Create a XYChart object of size 620 x 280 pixels. Set background color to light
# blue (ccccff), with 1 pixel 3D border effect.
c = XYChart(620, 280, '0xccccff', '0x000000', 1)

# Add a title to the chart using 15 points Times Bold Itatic font, with white
# (ffffff) text on a deep blue (000080) background
c.addTitle("Simple Gantt Chart Demo", "timesbi.ttf", 15, '0xffffff').setBackground(
    '0x000080')

# Set the plotarea at (140, 55) and of size 460 x 200 pixels. Use alternative
# white/grey background. Enable both horizontal and vertical grids by setting their
# colors to grey (c0c0c0). Set vertical major grid (represents month boundaries) 2
# pixels in width
c.setPlotArea(140, 55, 460, 200, '0xffffff', '0xeeeeee', LineColor, '0xc0c0c0',
    '0xc0c0c0').setGridWidth(2, 1, 1, 1)

# swap the x and y axes to create a horziontal box-whisker chart
c.swapXY()

# Set the y-axis scale to be date scale from Aug 16, 2004 to Nov 22, 2004, with ticks
# every 7 days (1 week)
c.yAxis().setDateScale(chartTime(2004, 8, 16), chartTime(2004, 11, 22), 86400 * 7)

# Set multi-style axis label formatting. Month labels are in Arial Bold font in "mmm
# d" format. Weekly labels just show the day of month and use minor tick (by using
# '-' as first character of format string).
c.yAxis().setMultiFormat(StartOfMonthFilter(), "<*font=arialbd.ttf*>{value|mmm d}",
    StartOfDayFilter(), "-{value|d}")

# Set the y-axis to shown on the top (right + swapXY = top)
c.setYAxisOnRight()

# Set the labels on the x axis
c.xAxis().setLabels(labels)

# Reverse the x-axis scale so that it points downwards.
c.xAxis().setReverse()

# Set the horizontal ticks and grid lines to be between the bars
c.xAxis().setTickOffset(0.5)

# Add a green (33ff33) box-whisker layer showing the box only.
c.addBoxWhiskerLayer(startDate, endDate, None, None, None, '0x00cc00',
    SameAsMainColor, SameAsMainColor)

# Output the chart
c.makeChart("gantt.png")

[CGI Version] pythondemo_cgi\gantt.py
#!/usr/bin/python
from pychartdir import *

# data for the gantt chart, representing the start date, end date and names for
# various activities
startDate = [chartTime(2004, 8, 16), chartTime(2004, 8, 30), chartTime(2004, 9, 13),
    chartTime(2004, 9, 20), chartTime(2004, 9, 27), chartTime(2004, 10, 4),
    chartTime(2004, 10, 25), chartTime(2004, 11, 1), chartTime(2004, 11, 8)]
endDate = [chartTime(2004, 8, 30), chartTime(2004, 9, 13), chartTime(2004, 9, 27),
    chartTime(2004, 10, 4), chartTime(2004, 10, 11), chartTime(2004, 11, 8),
    chartTime(2004, 11, 8), chartTime(2004, 11, 22), chartTime(2004, 11, 22)]
labels = ["Market Research", "Define Specifications", "Overall Archiecture",
    "Project Planning", "Detail Design", "Software Development", "Test Plan",
    "Testing and QA", "User Documentation"]

# Create a XYChart object of size 620 x 280 pixels. Set background color to light
# blue (ccccff), with 1 pixel 3D border effect.
c = XYChart(620, 280, '0xccccff', '0x000000', 1)

# Add a title to the chart using 15 points Times Bold Itatic font, with white
# (ffffff) text on a deep blue (000080) background
c.addTitle("Simple Gantt Chart Demo", "timesbi.ttf", 15, '0xffffff').setBackground(
    '0x000080')

# Set the plotarea at (140, 55) and of size 460 x 200 pixels. Use alternative
# white/grey background. Enable both horizontal and vertical grids by setting their
# colors to grey (c0c0c0). Set vertical major grid (represents month boundaries) 2
# pixels in width
c.setPlotArea(140, 55, 460, 200, '0xffffff', '0xeeeeee', LineColor, '0xc0c0c0',
    '0xc0c0c0').setGridWidth(2, 1, 1, 1)

# swap the x and y axes to create a horziontal box-whisker chart
c.swapXY()

# Set the y-axis scale to be date scale from Aug 16, 2004 to Nov 22, 2004, with ticks
# every 7 days (1 week)
c.yAxis().setDateScale(chartTime(2004, 8, 16), chartTime(2004, 11, 22), 86400 * 7)

# Set multi-style axis label formatting. Month labels are in Arial Bold font in "mmm
# d" format. Weekly labels just show the day of month and use minor tick (by using
# '-' as first character of format string).
c.yAxis().setMultiFormat(StartOfMonthFilter(), "<*font=arialbd.ttf*>{value|mmm d}",
    StartOfDayFilter(), "-{value|d}")

# Set the y-axis to shown on the top (right + swapXY = top)
c.setYAxisOnRight()

# Set the labels on the x axis
c.xAxis().setLabels(labels)

# Reverse the x-axis scale so that it points downwards.
c.xAxis().setReverse()

# Set the horizontal ticks and grid lines to be between the bars
c.xAxis().setTickOffset(0.5)

# Add a green (33ff33) box-whisker layer showing the box only.
c.addBoxWhiskerLayer(startDate, endDate, None, None, None, '0x00cc00',
    SameAsMainColor, SameAsMainColor)

# Output the chart
print("Content-type: image/png\n")
binaryPrint(c.makeChart2(PNG))