ChartDirector 6.0 (Ruby Edition)
Multi-Pointer Horizontal Meter
Source Code Listing
require("chartdirector") class MultihmeterController < ApplicationController def index() @title = "Multi-Pointer Horizontal Meter" @ctrl_file = File.expand_path(__FILE__) @noOfCharts = 1 render :template => "templates/chartview" end # # Render and deliver the chart # def getchart() # The values to display on the meter value0 = 30.99 value1 = 45.35 value2 = 77.64 # Create an LinearMeter object of size 250 x 75 pixels, using silver background with a 2 # pixel black 3D depressed border. m = ChartDirector::LinearMeter.new(250, 75, ChartDirector::silverColor(), 0, -2) # Set the scale region top-left corner at (15, 25), with size of 220 x 20 pixels. The scale # labels are located on the top (implies horizontal meter) m.setMeter(15, 25, 220, 20, ChartDirector::Top) # Set meter scale from 0 - 100, with a tick every 10 units m.setScale(0, 100, 10) # Set 0 - 50 as green (99ff99) zone, 50 - 80 as yellow (ffff66) zone, and 80 - 100 as red # (ffcccc) zone m.addZone(0, 50, 0x99ff99) m.addZone(50, 80, 0xffff66) m.addZone(80, 100, 0xffcccc) # Add deep red (000080), deep green (008000) and deep blue (800000) pointers to reflect the # values m.addPointer(value0, 0x000080) m.addPointer(value1, 0x008000) m.addPointer(value2, 0x800000) # Add a label at bottom-left (10, 68) using Arial Bold/8pt/red (c00000) m.addText(10, 68, "Temp C", "arialbd.ttf", 8, 0xc00000, ChartDirector::BottomLeft) # Add three text boxes to show the values in this meter m.addText(148, 70, m.formatValue(value0, "2"), "arial.ttf", 8, 0x6666ff, ChartDirector::BottomRight).setBackground(0, 0, -1) m.addText(193, 70, m.formatValue(value1, "2"), "arial.ttf", 8, 0x33ff33, ChartDirector::BottomRight).setBackground(0, 0, -1) m.addText(238, 70, m.formatValue(value2, "2"), "arial.ttf", 8, 0xff3333, ChartDirector::BottomRight).setBackground(0, 0, -1) # 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 values to display on the meter value0 = 30.99 value1 = 45.35 value2 = 77.64 # Create an LinearMeter object of size 250 x 75 pixels, using silver background with a 2 pixel black # 3D depressed border. m = ChartDirector::LinearMeter.new(250, 75, ChartDirector::silverColor(), 0, -2) # Set the scale region top-left corner at (15, 25), with size of 220 x 20 pixels. The scale labels # are located on the top (implies horizontal meter) m.setMeter(15, 25, 220, 20, ChartDirector::Top) # Set meter scale from 0 - 100, with a tick every 10 units m.setScale(0, 100, 10) # Set 0 - 50 as green (99ff99) zone, 50 - 80 as yellow (ffff66) zone, and 80 - 100 as red (ffcccc) # zone m.addZone(0, 50, 0x99ff99) m.addZone(50, 80, 0xffff66) m.addZone(80, 100, 0xffcccc) # Add deep red (000080), deep green (008000) and deep blue (800000) pointers to reflect the values m.addPointer(value0, 0x000080) m.addPointer(value1, 0x008000) m.addPointer(value2, 0x800000) # Add a label at bottom-left (10, 68) using Arial Bold/8pt/red (c00000) m.addText(10, 68, "Temp C", "arialbd.ttf", 8, 0xc00000, ChartDirector::BottomLeft) # Add three text boxes to show the values in this meter m.addText(148, 70, m.formatValue(value0, "2"), "arial.ttf", 8, 0x6666ff, ChartDirector::BottomRight ).setBackground(0, 0, -1) m.addText(193, 70, m.formatValue(value1, "2"), "arial.ttf", 8, 0x33ff33, ChartDirector::BottomRight ).setBackground(0, 0, -1) m.addText(238, 70, m.formatValue(value2, "2"), "arial.ttf", 8, 0xff3333, ChartDirector::BottomRight ).setBackground(0, 0, -1) # Output the chart m.makeChart("multihmeter.png") |