ChartDirector 6.0 (Ruby Edition)

Multi-Line Chart (1)




This example demonstrates a chart with multiple lines of different styles. It also demonstrates using frame with rounded corners, title with glass shading effect, both vertical and horizontal grid lines, and a legend at the top of the plot area.

Source Code Listing

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

class MultilineController < ApplicationController

    def index()
        @title = "Multi-Line Chart (1)"
        @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, 51, 46, 29, 41, 44, 57, 59, 52, 37, 34, 51, 56, 56, 60, 70, 76, 63,
            67, 75, 64, 51]
        data1 = [50, 55, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67, 67, 58, 59, 73, 77, 84,
            82, 80, 84, 98]
        data2 = [36, 28, 25, 33, 38, 20, 22, 30, 25, 33, 30, 24, 28, 15, 21, 26, 46, 42, 48, 45, 43,
            52, 64, 60, 70]

        # The labels for the line chart
        labels = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14",
            "15", "16", "17", "18", "19", "20", "21", "22", "23", "24"]

        # Create an XYChart object of size 600 x 300 pixels, with a light blue (EEEEFF) background,
        # black border, 1 pxiel 3D border effect and rounded corners
        c = ChartDirector::XYChart.new(600, 300, 0xeeeeff, 0x000000, 1)
        c.setRoundedFrame()

        # Set the plotarea at (55, 58) and of size 520 x 195 pixels, with white background. Turn on
        # both horizontal and vertical grid lines with light grey color (0xcccccc)
        c.setPlotArea(55, 58, 520, 195, 0xffffff, -1, -1, 0xcccccc, 0xcccccc)

        # Add a legend box at (50, 30) (top of the chart) with horizontal layout. Use 9pt Arial Bold
        # font. Set the background and border color to Transparent.
        c.addLegend(50, 30, false, "arialbd.ttf", 9).setBackground(ChartDirector::Transparent)

        # Add a title box to the chart using 15pt Times Bold Italic font, on a light blue (CCCCFF)
        # background with glass effect. white (0xffffff) on a dark red (0x800000) background, with a
        # 1 pixel 3D border.
        c.addTitle("Application Server Throughput", "timesbi.ttf", 15).setBackground(0xccccff,
            0x000000, ChartDirector::glassEffect())

        # Add a title to the y axis
        c.yAxis().setTitle("MBytes per hour")

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

        # Display 1 out of 3 labels on the x-axis.
        c.xAxis().setLabelStep(3)

        # Add a title to the x axis
        c.xAxis().setTitle("Jun 12, 2006")

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

        # Set the default line width to 2 pixels
        layer.setLineWidth(2)

        # Add the three data sets to the line layer. For demo purpose, we use a dash line color for
        # the last line
        layer.addDataSet(data0, 0xff0000, "Server #1")
        layer.addDataSet(data1, 0x008800, "Server #2")
        layer.addDataSet(data2, c.dashLineColor(0x3333ff, ChartDirector::DashLine), "Server #3")

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

# The data for the line chart
data0 = [42, 49, 33, 38, 51, 46, 29, 41, 44, 57, 59, 52, 37, 34, 51, 56, 56, 60, 70, 76, 63, 67, 75,
    64, 51]
data1 = [50, 55, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67, 67, 58, 59, 73, 77, 84, 82, 80,
    84, 98]
data2 = [36, 28, 25, 33, 38, 20, 22, 30, 25, 33, 30, 24, 28, 15, 21, 26, 46, 42, 48, 45, 43, 52, 64,
    60, 70]

# The labels for the line chart
labels = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15",
    "16", "17", "18", "19", "20", "21", "22", "23", "24"]

# Create an XYChart object of size 600 x 300 pixels, with a light blue (EEEEFF) background, black
# border, 1 pxiel 3D border effect and rounded corners
c = ChartDirector::XYChart.new(600, 300, 0xeeeeff, 0x000000, 1)
c.setRoundedFrame()

# Set the plotarea at (55, 58) and of size 520 x 195 pixels, with white background. Turn on both
# horizontal and vertical grid lines with light grey color (0xcccccc)
c.setPlotArea(55, 58, 520, 195, 0xffffff, -1, -1, 0xcccccc, 0xcccccc)

# Add a legend box at (50, 30) (top of the chart) with horizontal layout. Use 9pt Arial Bold font.
# Set the background and border color to Transparent.
c.addLegend(50, 30, false, "arialbd.ttf", 9).setBackground(ChartDirector::Transparent)

# Add a title box to the chart using 15pt Times Bold Italic font, on a light blue (CCCCFF)
# background with glass effect. white (0xffffff) on a dark red (0x800000) background, with a 1 pixel
# 3D border.
c.addTitle("Application Server Throughput", "timesbi.ttf", 15).setBackground(0xccccff, 0x000000,
    ChartDirector::glassEffect())

# Add a title to the y axis
c.yAxis().setTitle("MBytes per hour")

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

# Display 1 out of 3 labels on the x-axis.
c.xAxis().setLabelStep(3)

# Add a title to the x axis
c.xAxis().setTitle("Jun 12, 2006")

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

# Set the default line width to 2 pixels
layer.setLineWidth(2)

# Add the three data sets to the line layer. For demo purpose, we use a dash line color for the last
# line
layer.addDataSet(data0, 0xff0000, "Server #1")
layer.addDataSet(data1, 0x008800, "Server #2")
layer.addDataSet(data2, c.dashLineColor(0x3333ff, ChartDirector::DashLine), "Server #3")

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