Multi-Layer Gantt Chart

[Ruby On Rails Version - Controller] app/controllers/layergantt_controller.rb

require("chartdirector")

class LayerganttController < ApplicationController

    def index()
        @title = "Multi-Layer Gantt Chart"
        @ctrl_file = File.expand_path(__FILE__)
        @noOfCharts = 1
        render :template => "templates/chartview"
    end

    #
    # Render and deliver the chart
    #
    def getchart()
        # the names of the tasks
        labels = ["Market Research", "Define Specifications", "Overall Archiecture",
            "Project Planning", "Detail Design", "Software Development", "Test Plan",
            "Testing and QA", "User Documentation"]

        # the planned start dates and end dates for the tasks
        startDate = [Time.mktime(2004, 8, 16), Time.mktime(2004, 8, 30), Time.mktime(2004, 9, 13),
            Time.mktime(2004, 9, 20), Time.mktime(2004, 9, 27), Time.mktime(2004, 10, 4),
            Time.mktime(2004, 10, 25), Time.mktime(2004, 11, 1), Time.mktime(2004, 11, 8)]
        endDate = [Time.mktime(2004, 8, 30), Time.mktime(2004, 9, 13), Time.mktime(2004, 9, 27),
            Time.mktime(2004, 10, 4), Time.mktime(2004, 10, 11), Time.mktime(2004, 11, 8),
            Time.mktime(2004, 11, 8), Time.mktime(2004, 11, 22), Time.mktime(2004, 11, 22)]

        # the actual start dates and end dates for the tasks up to now
        actualStartDate = [Time.mktime(2004, 8, 16), Time.mktime(2004, 8, 27), Time.mktime(2004, 9,
            9), Time.mktime(2004, 9, 18), Time.mktime(2004, 9, 22)]
        actualEndDate = [Time.mktime(2004, 8, 27), Time.mktime(2004, 9, 9), Time.mktime(2004, 9, 27
            ), Time.mktime(2004, 10, 2), Time.mktime(2004, 10, 8)]

        # Create a XYChart object of size 620 x 280 pixels. Set background color to light green
        # (ccffcc) with 1 pixel 3D border effect.
        c = ChartDirector::XYChart.new(620, 280, 0xccffcc, 0x000000, 1)

        # Add a title to the chart using 15 points Times Bold Itatic font, with white (ffffff) text
        # on a dark green (0x6000) background
        c.addTitle("Multi-Layer Gantt Chart Demo", "timesbi.ttf", 15, 0xffffff).setBackground(
            0x006000)

        # 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, ChartDirector::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(Time.mktime(2004, 8, 16), Time.mktime(2004, 11, 22), 86400 * 7)

        # Add a red (ff0000) dash line to represent the current day
        c.yAxis().addMark(Time.mktime(2004, 10, 8), c.dashLineColor(0xff0000,
            ChartDirector::DashLine))

        # 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(ChartDirector::StartOfMonthFilter(),
            "<*font=arialbd.ttf*>{value|mmm d}", ChartDirector::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)

        # Use blue (0000aa) as the color for the planned schedule
        plannedColor = 0x0000aa

        # Use a red hash pattern as the color for the actual dates. The pattern is created as a 4 x
        # 4 bitmap defined in memory as an array of colors.
        actualColor = c.patternColor([0xffffff, 0xffffff, 0xffffff, 0xff0000, 0xffffff, 0xffffff,
            0xff0000, 0xffffff, 0xffffff, 0xff0000, 0xffffff, 0xffffff, 0xff0000, 0xffffff,
            0xffffff, 0xffffff], 4)

        # Add a box whisker layer to represent the actual dates. We add the actual dates layer
        # first, so it will be the top layer.
        actualLayer = c.addBoxLayer(actualStartDate, actualEndDate, actualColor, "Actual")

        # Set the bar height to 8 pixels so they will not block the bottom bar
        actualLayer.setDataWidth(8)

        # Add a box-whisker layer to represent the planned schedule date
        c.addBoxLayer(startDate, endDate, plannedColor, "Planned").setBorderColor(
            ChartDirector::SameAsMainColor)

        # Add a legend box on the top right corner (595, 60) of the plot area with 8 pt Arial Bold
        # font. Use a semi-transparent grey (80808080) background.
        b = c.addLegend(595, 60, false, "arialbd.ttf", 8)
        b.setAlignment(ChartDirector::TopRight)
        b.setBackground(0x80808080, -1, 2)

        # Output the chart
        send_data(c.makeChart2(ChartDirector::PNG), :type => "image/png", :disposition => "inline")

    end

end

[Ruby On Rails Version - View] app/views/templates/chartview.html.erb

<html>
<body style="margin:5px 0px 0px 5px">

<!-- Title -->
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    <%= @title %>
</div>
<hr style="border:solid 1px #000080" />

<!-- Source Code Listing Link -->
<div style="font-size:9pt; font-family:verdana; margin-bottom:1.5em">
    <%= link_to "Source Code Listing", 
        :controller => "cddemo", :action => "viewsource",
        :ctrl_file => @ctrl_file, :view_file => File.expand_path(__FILE__) %>
</div>

<!-- Create one or more IMG tags to display the demo chart(s) -->
<% 0.upto(@noOfCharts - 1) do |i| %>
    <img src="<%= url_for(:action => "getchart", :img => i) %>">
<% end %>

</body>
</html>

[Command Line Version] rubydemo/layergantt.rb

#!/usr/bin/env ruby
require("chartdirector")

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

# the planned start dates and end dates for the tasks
startDate = [Time.mktime(2004, 8, 16), Time.mktime(2004, 8, 30), Time.mktime(2004, 9, 13),
    Time.mktime(2004, 9, 20), Time.mktime(2004, 9, 27), Time.mktime(2004, 10, 4), Time.mktime(2004,
    10, 25), Time.mktime(2004, 11, 1), Time.mktime(2004, 11, 8)]
endDate = [Time.mktime(2004, 8, 30), Time.mktime(2004, 9, 13), Time.mktime(2004, 9, 27),
    Time.mktime(2004, 10, 4), Time.mktime(2004, 10, 11), Time.mktime(2004, 11, 8), Time.mktime(2004,
    11, 8), Time.mktime(2004, 11, 22), Time.mktime(2004, 11, 22)]

# the actual start dates and end dates for the tasks up to now
actualStartDate = [Time.mktime(2004, 8, 16), Time.mktime(2004, 8, 27), Time.mktime(2004, 9, 9),
    Time.mktime(2004, 9, 18), Time.mktime(2004, 9, 22)]
actualEndDate = [Time.mktime(2004, 8, 27), Time.mktime(2004, 9, 9), Time.mktime(2004, 9, 27),
    Time.mktime(2004, 10, 2), Time.mktime(2004, 10, 8)]

# Create a XYChart object of size 620 x 280 pixels. Set background color to light green (ccffcc)
# with 1 pixel 3D border effect.
c = ChartDirector::XYChart.new(620, 280, 0xccffcc, 0x000000, 1)

# Add a title to the chart using 15 points Times Bold Itatic font, with white (ffffff) text on a
# dark green (0x6000) background
c.addTitle("Multi-Layer Gantt Chart Demo", "timesbi.ttf", 15, 0xffffff).setBackground(0x006000)

# 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, ChartDirector::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(Time.mktime(2004, 8, 16), Time.mktime(2004, 11, 22), 86400 * 7)

# Add a red (ff0000) dash line to represent the current day
c.yAxis().addMark(Time.mktime(2004, 10, 8), c.dashLineColor(0xff0000, ChartDirector::DashLine))

# 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(ChartDirector::StartOfMonthFilter(), "<*font=arialbd.ttf*>{value|mmm d}",
    ChartDirector::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)

# Use blue (0000aa) as the color for the planned schedule
plannedColor = 0x0000aa

# Use a red hash pattern as the color for the actual dates. The pattern is created as a 4 x 4 bitmap
# defined in memory as an array of colors.
actualColor = c.patternColor([0xffffff, 0xffffff, 0xffffff, 0xff0000, 0xffffff, 0xffffff, 0xff0000,
    0xffffff, 0xffffff, 0xff0000, 0xffffff, 0xffffff, 0xff0000, 0xffffff, 0xffffff, 0xffffff], 4)

# Add a box whisker layer to represent the actual dates. We add the actual dates layer first, so it
# will be the top layer.
actualLayer = c.addBoxLayer(actualStartDate, actualEndDate, actualColor, "Actual")

# Set the bar height to 8 pixels so they will not block the bottom bar
actualLayer.setDataWidth(8)

# Add a box-whisker layer to represent the planned schedule date
c.addBoxLayer(startDate, endDate, plannedColor, "Planned").setBorderColor(
    ChartDirector::SameAsMainColor)

# Add a legend box on the top right corner (595, 60) of the plot area with 8 pt Arial Bold font. Use
# a semi-transparent grey (80808080) background.
b = c.addLegend(595, 60, false, "arialbd.ttf", 8)
b.setAlignment(ChartDirector::TopRight)
b.setBackground(0x80808080, -1, 2)

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