ChartDirector 6.0 (Ruby Edition)
Square Angular Meters
Source Code Listing
require("chartdirector") class SquareameterController < ApplicationController def index() @title = "Square Angular Meters" @ctrl_file = File.expand_path(__FILE__) @noOfCharts = 4 render :template => "templates/chartview" end # # Render and deliver the chart # def getchart() # This script can draw different charts depending on the chartIndex chartIndex = (params["img"]).to_i # The value to display on the meter value = 4.75 # Create an AugularMeter object of size 110 x 110 pixels, using silver background color with # a black 2 pixel 3D depressed border. m = ChartDirector::AngularMeter.new(110, 110, ChartDirector::silverColor(), 0x000000, -2) # Set meter appearance according to a parameter if chartIndex == 0 # Set the meter center at bottom left corner (15, 95), with radius 85 pixels. Meter # spans from 90 - 0 degrees. m.setMeter(15, 95, 85, 90, 0) # Add a label to the meter centered at (35, 75) m.addText(35, 75, "VDC", "arialbd.ttf", 12, ChartDirector::TextColor, ChartDirector::Center) # Add a text box to show the value at top right corner (103, 7) m.addText(103, 7, m.formatValue(value, "2"), "arial.ttf", 8, 0xffffff, ChartDirector::TopRight).setBackground(0, 0, -1) elsif chartIndex == 1 # Set the meter center at top left corner (15, 15), with radius 85 pixels. Meter spans # from 90 - 180 degrees. m.setMeter(15, 15, 85, 90, 180) # Add a label to the meter centered at (35, 35) m.addText(35, 35, "AMP", "arialbd.ttf", 12, ChartDirector::TextColor, ChartDirector::Center) # Add a text box to show the value at bottom right corner (103, 103) m.addText(103, 103, m.formatValue(value, "2"), "arial.ttf", 8, 0xffffff, ChartDirector::BottomRight).setBackground(0, 0, -1) elsif chartIndex == 2 # Set the meter center at top right corner (15, 95), with radius 85 pixels. Meter spans # from 270 - 180 degrees. m.setMeter(95, 15, 85, 270, 180) # Add a label to the meter centered at (75, 35) m.addText(75, 35, "KW", "arialbd.ttf", 12, ChartDirector::TextColor, ChartDirector::Center) # Add a text box to show the value at bottom left corner (7, 103) m.addText(7, 103, m.formatValue(value, "2"), "arial.ttf", 8, 0xffffff, ChartDirector::BottomLeft).setBackground(0, 0, -1) else # Set the meter center at bottom right corner (95, 95), with radius 85 pixels. Meter # spans from 270 - 360 degrees. m.setMeter(95, 95, 85, 270, 360) # Add a label to the meter centered at (75, 75) m.addText(75, 75, "RPM", "arialbd.ttf", 12, ChartDirector::TextColor, ChartDirector::Center) # Add a text box to show the value at top left corner (7, 7) m.addText(7, 7, m.formatValue(value, "2"), "arial.ttf", 8, 0xffffff, ChartDirector::TopLeft).setBackground(0, 0, -1) end # Meter scale is 0 - 10, with a major tick every 2 units, and minor tick every 1 unit m.setScale(0, 10, 2, 1) # Set 0 - 6 as green (99ff99) zone, 6 - 8 as yellow (ffff00) zone, and 8 - 10 as red # (ff3333) zone m.addZone(0, 6, 0x99ff99, 0x808080) m.addZone(6, 8, 0xffff00, 0x808080) m.addZone(8, 10, 0xff3333, 0x808080) # Add a semi-transparent black (80000000) pointer at the specified value m.addPointer(value, 0x80000000) # 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") def createChart(chartIndex) # The value to display on the meter value = 4.75 # Create an AugularMeter object of size 110 x 110 pixels, using silver background color with a # black 2 pixel 3D depressed border. m = ChartDirector::AngularMeter.new(110, 110, ChartDirector::silverColor(), 0x000000, -2) # Set meter appearance according to a parameter if chartIndex == 0 # Set the meter center at bottom left corner (15, 95), with radius 85 pixels. Meter spans # from 90 - 0 degrees. m.setMeter(15, 95, 85, 90, 0) # Add a label to the meter centered at (35, 75) m.addText(35, 75, "VDC", "arialbd.ttf", 12, ChartDirector::TextColor, ChartDirector::Center) # Add a text box to show the value at top right corner (103, 7) m.addText(103, 7, m.formatValue(value, "2"), "arial.ttf", 8, 0xffffff, ChartDirector::TopRight).setBackground(0, 0, -1) elsif chartIndex == 1 # Set the meter center at top left corner (15, 15), with radius 85 pixels. Meter spans from # 90 - 180 degrees. m.setMeter(15, 15, 85, 90, 180) # Add a label to the meter centered at (35, 35) m.addText(35, 35, "AMP", "arialbd.ttf", 12, ChartDirector::TextColor, ChartDirector::Center) # Add a text box to show the value at bottom right corner (103, 103) m.addText(103, 103, m.formatValue(value, "2"), "arial.ttf", 8, 0xffffff, ChartDirector::BottomRight).setBackground(0, 0, -1) elsif chartIndex == 2 # Set the meter center at top right corner (15, 95), with radius 85 pixels. Meter spans from # 270 - 180 degrees. m.setMeter(95, 15, 85, 270, 180) # Add a label to the meter centered at (75, 35) m.addText(75, 35, "KW", "arialbd.ttf", 12, ChartDirector::TextColor, ChartDirector::Center) # Add a text box to show the value at bottom left corner (7, 103) m.addText(7, 103, m.formatValue(value, "2"), "arial.ttf", 8, 0xffffff, ChartDirector::BottomLeft).setBackground(0, 0, -1) else # Set the meter center at bottom right corner (95, 95), with radius 85 pixels. Meter spans # from 270 - 360 degrees. m.setMeter(95, 95, 85, 270, 360) # Add a label to the meter centered at (75, 75) m.addText(75, 75, "RPM", "arialbd.ttf", 12, ChartDirector::TextColor, ChartDirector::Center) # Add a text box to show the value at top left corner (7, 7) m.addText(7, 7, m.formatValue(value, "2"), "arial.ttf", 8, 0xffffff, ChartDirector::TopLeft ).setBackground(0, 0, -1) end # Meter scale is 0 - 10, with a major tick every 2 units, and minor tick every 1 unit m.setScale(0, 10, 2, 1) # Set 0 - 6 as green (99ff99) zone, 6 - 8 as yellow (ffff00) zone, and 8 - 10 as red (ff3333) # zone m.addZone(0, 6, 0x99ff99, 0x808080) m.addZone(6, 8, 0xffff00, 0x808080) m.addZone(8, 10, 0xff3333, 0x808080) # Add a semi-transparent black (80000000) pointer at the specified value m.addPointer(value, 0x80000000) # Output the chart m.makeChart("squareameter%s.png" % chartIndex) end createChart(0) createChart(1) createChart(2) createChart(3) |