Multi-Color Gantt Chart

pythondemo\colorgantt.py
#!/usr/bin/python

# The ChartDirector for Python module is assumed to be in "../lib"
import sys, os
sys.path.insert(0, os.path.join(os.path.abspath(sys.path[0]), "..", "lib"))

from pychartdir import *

# The tasks for the gantt chart
labels = ["Market Research", "Define Specifications", "Overall Archiecture", "Project Planning",
    "Detail Design", "Software Development", "Test Plan", "Testing and QA", "User Documentation"]

# The task index, start date, end date and color for each bar
taskNo = [0, 0, 1, 2, 3, 4, 5, 6, 6, 7, 8, 8]
startDate = [chartTime(2018, 8, 16), chartTime(2018, 10, 4), chartTime(2018, 8, 30), chartTime(2018,
    9, 13), chartTime(2018, 9, 20), chartTime(2018, 9, 27), chartTime(2018, 10, 4), chartTime(2018,
    10, 4), chartTime(2018, 10, 25), chartTime(2018, 11, 1), chartTime(2018, 10, 18), chartTime(
    2018, 11, 8)]
endDate = [chartTime(2018, 8, 30), chartTime(2018, 10, 18), chartTime(2018, 9, 13), chartTime(2018,
    9, 27), chartTime(2018, 10, 4), chartTime(2018, 10, 11), chartTime(2018, 11, 8), chartTime(2018,
    10, 18), chartTime(2018, 11, 8), chartTime(2018, 11, 22), chartTime(2018, 11, 1), chartTime(
    2018, 11, 22)]
colors = [0x00cc00, 0x00cc00, 0x00cc00, 0x0000cc, 0x0000cc, 0xcc0000, 0xcc0000, 0x0000cc, 0xcc0000,
    0xcc0000, 0x00cc00, 0xcc0000]

# Create a XYChart object of size 620 x 325 pixels. Set background color to light red (0xffcccc),
# with 1 pixel 3D border effect.
c = XYChart(620, 325, 0xffcccc, 0x000000, 1)

# Add a title to the chart using 15 points Times Bold Itatic font, with white (ffffff) text on a
# dark red (800000) background
c.addTitle("Mutli-Color Gantt Chart Demo", "Times New Roman Bold Italic", 15, 0xffffff
    ).setBackground(0x800000)

# 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, 2018 to Nov 22, 2018, with ticks every 7 days
# (1 week)
c.yAxis().setDateScale(chartTime(2018, 8, 16), chartTime(2018, 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=Arial Bold*>{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 some symbols to the chart to represent milestones. The symbols are added using scatter layers.
# We need to specify the task index, date, name, symbol shape, size and color.
c.addScatterLayer([1], [chartTime(2018, 9, 13)], "Milestone 1", Cross2Shape(), 13, 0xffff00)
c.addScatterLayer([3], [chartTime(2018, 10, 4)], "Milestone 2", StarShape(5), 15, 0xff00ff)
c.addScatterLayer([5], [chartTime(2018, 11, 8)], "Milestone 3", TriangleSymbol, 13, 0xff9933)

# Add a multi-color box-whisker layer to represent the gantt bars
layer = c.addBoxWhiskerLayer2(startDate, endDate, None, None, None, colors)
layer.setXData(taskNo)
layer.setBorderColor(SameAsMainColor)

# Divide the plot area height ( = 200 in this chart) by the number of tasks to get the height of
# each slot. Use 80% of that as the bar height.
layer.setDataWidth(int(200 * 0.8 / len(labels)))

# Add a legend box at (140, 265) - bottom of the plot area. Use 8pt Arial Bold as the font with
# auto-grid layout. Set the width to the same width as the plot area. Set the backgorund to grey
# (dddddd).
legendBox = c.addLegend2(140, 265, AutoGrid, "Arial Bold", 8)
legendBox.setWidth(461)
legendBox.setBackground(0xdddddd)

# The keys for the scatter layers (milestone symbols) will automatically be added to the legend box.
# We just need to add keys to show the meanings of the bar colors.
legendBox.addKey("Market Team", 0x00cc00)
legendBox.addKey("Planning Team", 0x0000cc)
legendBox.addKey("Development Team", 0xcc0000)

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