ChartDirector 6.0 (Ruby Edition)
Linear Zone Meter
Source Code Listing
require("chartdirector") class LinearzonemeterController < ApplicationController def index() @title = "Linear Zone Meter" @ctrl_file = File.expand_path(__FILE__) @noOfCharts = 1 render :template => "templates/chartview" end # # Render and deliver the chart # def getchart() # The value to display on the meter value = 85 # Create an LinearMeter object of size 210 x 45 pixels, using silver background with a 2 # pixel black 3D depressed border. m = ChartDirector::LinearMeter.new(210, 45, ChartDirector::silverColor(), 0, -2) # Set the scale region top-left corner at (5, 5), with size of 200 x 20 pixels. The scale # labels are located on the bottom (implies horizontal meter) m.setMeter(5, 5, 200, 20, ChartDirector::Bottom) # Set meter scale from 0 - 100 m.setScale(0, 100) # Add a title at the bottom of the meter with a 1 pixel raised 3D border m.addTitle2(ChartDirector::Bottom, "Battery Level", "arialbd.ttf", 8).setBackground( ChartDirector::Transparent, -1, 1) # Set 3 zones of different colors to represent Good/Weak/Bad data ranges m.addZone(50, 100, 0x99ff99, "Good") m.addZone(20, 50, 0xffff66, "Weak") m.addZone(0, 20, 0xffcccc, "Bad") # Add empty labels (just need the ticks) at 0/20/50/80 as separators for zones m.addLabel(0, " ") m.addLabel(20, " ") m.addLabel(50, " ") m.addLabel(100, " ") # Add a semi-transparent blue (800000ff) pointer at the specified value, using triangular # pointer shape m.addPointer(value, 0x800000ff).setShape(ChartDirector::TriangularPointer) # Output the chart send_data(m.makeChart2(ChartDirector::PNG), :type => "image/png", :disposition => "inline") end end |
<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> |
#!/usr/bin/env ruby require("chartdirector") # The value to display on the meter value = 85 # Create an LinearMeter object of size 210 x 45 pixels, using silver background with a 2 pixel black # 3D depressed border. m = ChartDirector::LinearMeter.new(210, 45, ChartDirector::silverColor(), 0, -2) # Set the scale region top-left corner at (5, 5), with size of 200 x 20 pixels. The scale labels are # located on the bottom (implies horizontal meter) m.setMeter(5, 5, 200, 20, ChartDirector::Bottom) # Set meter scale from 0 - 100 m.setScale(0, 100) # Add a title at the bottom of the meter with a 1 pixel raised 3D border m.addTitle2(ChartDirector::Bottom, "Battery Level", "arialbd.ttf", 8).setBackground( ChartDirector::Transparent, -1, 1) # Set 3 zones of different colors to represent Good/Weak/Bad data ranges m.addZone(50, 100, 0x99ff99, "Good") m.addZone(20, 50, 0xffff66, "Weak") m.addZone(0, 20, 0xffcccc, "Bad") # Add empty labels (just need the ticks) at 0/20/50/80 as separators for zones m.addLabel(0, " ") m.addLabel(20, " ") m.addLabel(50, " ") m.addLabel(100, " ") # Add a semi-transparent blue (800000ff) pointer at the specified value, using triangular pointer # shape m.addPointer(value, 0x800000ff).setShape(ChartDirector::TriangularPointer) # Output the chart m.makeChart("linearzonemeter.png") |