ChartDirector 6.0 (Ruby Edition)

Exploded Pie Chart




This example demonstrates a pie chart with all sectors exploded. It also demonstrates many effects, such as gradient color background, rounded frame, soft drop shadow, custom sector colors, sector gradient shading, thick sector border, and using CDML and Parameter Substitution and Formatting to format sector labels.

Source Code Listing

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

class ExplodedpieController < ApplicationController

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

    #
    # Render and deliver the chart
    #
    def getchart()
        # The data for the pie chart
        data = [21, 18, 15, 12, 8, 24]

        # The labels for the pie chart
        labels = ["Labor", "Licenses", "Taxes", "Legal", "Facilities", "Production"]

        # The colors to use for the sectors
        colors = [0x66aaee, 0xeebb22, 0xbbbbbb, 0x8844ff, 0xdd2222, 0x009900]

        # Create a PieChart object of size 600 x 360 pixels.
        c = ChartDirector::PieChart.new(600, 360)

        # Use the white on black palette, which means the default text and line colors are white
        c.setColors(ChartDirector::whiteOnBlackPalette)

        # Use a vertical gradient color from deep blue (000066) to blue (0000cc) as background. Use
        # rounded corners of 20 pixels radius. Enable soft drop shadow.
        c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight(), 0x000066, 0x0000cc))
        c.setRoundedFrame(0xffffff, 20)
        c.setDropShadow()

        # Add a title using 18pt Times New Roman Bold Italic font. Add 16 pixels top margin to the
        # title.
        c.addTitle("Exploded Pie Chart Demonstration", "timesbi.ttf", 18).setMargin2(0, 0, 16, 0)

        # Set the center of the pie at (300, 195) and the radius to 110 pixels
        c.setPieSize(300, 195, 110)

        # Set the pie data and the pie labels
        c.setData(data, labels)

        # Set the sector colors
        c.setColors2(ChartDirector::DataColor, colors)

        # Use local gradient shading for the sectors, with 5 pixels wide semi-transparent white
        # (bbffffff) borders
        c.setSectorStyle(ChartDirector::LocalGradientShading, 0xbbffffff, 5)

        # Use the side label layout method
        c.setLabelLayout(ChartDirector::SideLayout)

        # Use 10pt Arial Bold as the default label font. Set the label box background color the same
        # as the sector color. Use soft lighting effect with light direction from right. Use 8
        # pixels rounded corners.
        t = c.setLabelStyle("arialbd.ttf", 10, 0x000000)
        t.setBackground(ChartDirector::SameAsMainColor, ChartDirector::Transparent,
            ChartDirector::softLighting(ChartDirector::Right, 0))
        t.setRoundedCorners(8)

        # Set the sector label format. The label is centered in a 110 pixels wide bounding box. It
        # consists of two lines. The first line is the sector name. The second line shows the data
        # value and percentage.
        c.setLabelFormat(
            "<*block,halign=center,width=110*>{label}\n<*font=arial.ttf,size=8*>US$ {value}M " \
            "({percent}%)<*/*>")

        # Explode all sectors 10 pixels from the center
        c.setExplode(-1, 10)

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

# The data for the pie chart
data = [21, 18, 15, 12, 8, 24]

# The labels for the pie chart
labels = ["Labor", "Licenses", "Taxes", "Legal", "Facilities", "Production"]

# The colors to use for the sectors
colors = [0x66aaee, 0xeebb22, 0xbbbbbb, 0x8844ff, 0xdd2222, 0x009900]

# Create a PieChart object of size 600 x 360 pixels.
c = ChartDirector::PieChart.new(600, 360)

# Use the white on black palette, which means the default text and line colors are white
c.setColors(ChartDirector::whiteOnBlackPalette)

# Use a vertical gradient color from deep blue (000066) to blue (0000cc) as background. Use rounded
# corners of 20 pixels radius. Enable soft drop shadow.
c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight(), 0x000066, 0x0000cc))
c.setRoundedFrame(0xffffff, 20)
c.setDropShadow()

# Add a title using 18pt Times New Roman Bold Italic font. Add 16 pixels top margin to the title.
c.addTitle("Exploded Pie Chart Demonstration", "timesbi.ttf", 18).setMargin2(0, 0, 16, 0)

# Set the center of the pie at (300, 195) and the radius to 110 pixels
c.setPieSize(300, 195, 110)

# Set the pie data and the pie labels
c.setData(data, labels)

# Set the sector colors
c.setColors2(ChartDirector::DataColor, colors)

# Use local gradient shading for the sectors, with 5 pixels wide semi-transparent white (bbffffff)
# borders
c.setSectorStyle(ChartDirector::LocalGradientShading, 0xbbffffff, 5)

# Use the side label layout method
c.setLabelLayout(ChartDirector::SideLayout)

# Use 10pt Arial Bold as the default label font. Set the label box background color the same as the
# sector color. Use soft lighting effect with light direction from right. Use 8 pixels rounded
# corners.
t = c.setLabelStyle("arialbd.ttf", 10, 0x000000)
t.setBackground(ChartDirector::SameAsMainColor, ChartDirector::Transparent,
    ChartDirector::softLighting(ChartDirector::Right, 0))
t.setRoundedCorners(8)

# Set the sector label format. The label is centered in a 110 pixels wide bounding box. It consists
# of two lines. The first line is the sector name. The second line shows the data value and
# percentage.
c.setLabelFormat(
    "<*block,halign=center,width=110*>{label}\n<*font=arial.ttf,size=8*>US$ {value}M " \
    "({percent}%)<*/*>")

# Explode all sectors 10 pixels from the center
c.setExplode(-1, 10)

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