ChartDirector 5.1 (Ruby 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

[Ruby On Rails Version - Controller] app/controllers/gantt_controller.rb
require("chartdirector")

class GanttController < ApplicationController

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

    #
    # Render and deliver the chart
    #
    def getchart()
        # data for the gantt chart, representing the start date, end date and names for
        # various activities
        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)]
        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 = ChartDirector::XYChart.new(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, 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)

        # 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)

        # Add a green (33ff33) box-whisker layer showing the box only.
        c.addBoxWhiskerLayer(startDate, endDate, nil, nil, nil, 0x00cc00,
            ChartDirector::SameAsMainColor, ChartDirector::SameAsMainColor)

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

# data for the gantt chart, representing the start date, end date and names for
# various activities
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)
    ]
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 = ChartDirector::XYChart.new(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, 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
    )

# 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)

# Add a green (33ff33) box-whisker layer showing the box only.
c.addBoxWhiskerLayer(startDate, endDate, nil, nil, nil, 0x00cc00,
    ChartDirector::SameAsMainColor, ChartDirector::SameAsMainColor)

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