ChartDirector 6.0 (Ruby Edition)

Symbol Line Chart (2)




This example demonstrates using symbols to represent data points and using gradient color for plot area background.

Source Code Listing

[Ruby On Rails Version - Controller] app/controllers/symbolline2_controller.rb
require("chartdirector")

class Symbolline2Controller < ApplicationController

    def index()
        @title = "Symbol Line Chart (2)"
        @ctrl_file = File.expand_path(__FILE__)
        @noOfCharts = 1
        render :template => "templates/chartview"
    end

    #
    # Render and deliver the chart
    #
    def getchart()
        # The data for the line chart
        data0 = [42, 49, 33, 38, 64, 56, 29, 41, 44, 57, 59, 42]
        data1 = [65, 75, 47, 34, 42, 49, 73, 62, 90, 69, 66, 78]
        data2 = [36, 28, 25, 28, 38, 20, 22, 30, 25, 33, 30, 24]
        labels = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
            ]

        # Create a XYChart object of size 600 x 375 pixels
        c = ChartDirector::XYChart.new(600, 375)

        # Add a title to the chart using 18pt Times Bold Italic font
        c.addTitle("Product Line Global Revenue", "timesbi.ttf", 18)

        # Set the plotarea at (50, 55) and of 500 x 280 pixels in size. Use a vertical gradient
        # color from light blue (f9f9ff) to sky blue (aaccff) as background. Set border to
        # transparent and grid lines to white (ffffff).
        c.setPlotArea(50, 55, 500, 280, c.linearGradientColor(0, 55, 0, 335, 0xf9fcff, 0xaaccff),
            -1, ChartDirector::Transparent, 0xffffff)

        # Add a legend box at (50, 28) using horizontal layout. Use 10pt Arial Bold as font, with
        # transparent background.
        c.addLegend(50, 28, false, "arialbd.ttf", 10).setBackground(ChartDirector::Transparent)

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

        # Set y-axis tick density to 30 pixels. ChartDirector auto-scaling will use this as the
        # guideline when putting ticks on the y-axis.
        c.yAxis().setTickDensity(30)

        # Set axis label style to 8pt Arial Bold
        c.xAxis().setLabelStyle("arialbd.ttf", 8)
        c.yAxis().setLabelStyle("arialbd.ttf", 8)

        # Set axis line width to 2 pixels
        c.xAxis().setWidth(2)
        c.yAxis().setWidth(2)

        # Add axis title using 10pt Arial Bold Italic font
        c.yAxis().setTitle("Revenue in USD millions", "arialbi.ttf", 10)

        # Add a line layer to the chart
        layer = c.addLineLayer2()

        # Set the line width to 3 pixels
        layer.setLineWidth(3)

        # Add the three data sets to the line layer, using circles, diamands and X shapes as symbols
        layer.addDataSet(data0, 0xff0000, "Quantum Computer").setDataSymbol(
            ChartDirector::CircleSymbol, 9)
        layer.addDataSet(data1, 0x00ff00, "Atom Synthesizer").setDataSymbol(
            ChartDirector::DiamondSymbol, 11)
        layer.addDataSet(data2, 0xff6600, "Proton Cannon").setDataSymbol(ChartDirector::Cross2Shape(
            ), 11)

        # 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/symbolline2.rb
#!/usr/bin/env ruby
require("chartdirector")

# The data for the line chart
data0 = [42, 49, 33, 38, 64, 56, 29, 41, 44, 57, 59, 42]
data1 = [65, 75, 47, 34, 42, 49, 73, 62, 90, 69, 66, 78]
data2 = [36, 28, 25, 28, 38, 20, 22, 30, 25, 33, 30, 24]
labels = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]

# Create a XYChart object of size 600 x 375 pixels
c = ChartDirector::XYChart.new(600, 375)

# Add a title to the chart using 18pt Times Bold Italic font
c.addTitle("Product Line Global Revenue", "timesbi.ttf", 18)

# Set the plotarea at (50, 55) and of 500 x 280 pixels in size. Use a vertical gradient color from
# light blue (f9f9ff) to sky blue (aaccff) as background. Set border to transparent and grid lines
# to white (ffffff).
c.setPlotArea(50, 55, 500, 280, c.linearGradientColor(0, 55, 0, 335, 0xf9fcff, 0xaaccff), -1,
    ChartDirector::Transparent, 0xffffff)

# Add a legend box at (50, 28) using horizontal layout. Use 10pt Arial Bold as font, with
# transparent background.
c.addLegend(50, 28, false, "arialbd.ttf", 10).setBackground(ChartDirector::Transparent)

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

# Set y-axis tick density to 30 pixels. ChartDirector auto-scaling will use this as the guideline
# when putting ticks on the y-axis.
c.yAxis().setTickDensity(30)

# Set axis label style to 8pt Arial Bold
c.xAxis().setLabelStyle("arialbd.ttf", 8)
c.yAxis().setLabelStyle("arialbd.ttf", 8)

# Set axis line width to 2 pixels
c.xAxis().setWidth(2)
c.yAxis().setWidth(2)

# Add axis title using 10pt Arial Bold Italic font
c.yAxis().setTitle("Revenue in USD millions", "arialbi.ttf", 10)

# Add a line layer to the chart
layer = c.addLineLayer2()

# Set the line width to 3 pixels
layer.setLineWidth(3)

# Add the three data sets to the line layer, using circles, diamands and X shapes as symbols
layer.addDataSet(data0, 0xff0000, "Quantum Computer").setDataSymbol(ChartDirector::CircleSymbol, 9)
layer.addDataSet(data1, 0x00ff00, "Atom Synthesizer").setDataSymbol(ChartDirector::DiamondSymbol, 11
    )
layer.addDataSet(data2, 0xff6600, "Proton Cannon").setDataSymbol(ChartDirector::Cross2Shape(), 11)

# Output the chart
c.makeChart("symbolline2.png")