ChartDirector 6.0 (Ruby Edition)
White Semicircle Meters
Source Code Listing
require("chartdirector") class WhitesemicirclemeterController < ApplicationController def index() @title = "White Semicircle Meters" @ctrl_file = File.expand_path(__FILE__) @noOfCharts = 6 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 = 72.55 # Create an AngularMeter object of size 300 x 180 pixels with transparent background m = ChartDirector::AngularMeter.new(300, 180, ChartDirector::Transparent) # Set the default text and line colors to very dark grey (0x222222) m.setColor(ChartDirector::TextColor, 0x222222) m.setColor(ChartDirector::LineColor, 0x222222) # Center at (150, 150), scale radius = 128 pixels, scale angle -90 to +90 degrees m.setMeter(150, 150, 128, -90, 90) # Gradient color for the border to make it silver-like ringGradient = [1, 0x999999, 0.5, 0xdddddd, 0, 0xf8f8f8, -0.5, 0xdddddd, -1, 0x999999] # Background gradient color from white (0xffffff) at the center to light grey (0xdddddd) at # the border bgGradient = [0, 0xffffff, 0.75, 0xeeeeee, 1, 0xdddddd] # Add a scale background of 148 pixels radius using the gradient background, with a 10 pixel # thick silver border m.addScaleBackground(148, m.relativeRadialGradient(bgGradient, 148), 10, m.relativeLinearGradient(ringGradient, 45, 148)) # Add a 1 pixel light grey (0xbbbbbb) line at the inner edge of the thick silver border # (radius = 138) to enhance its contrast with the background gradient m.addScaleBackground(138, ChartDirector::Transparent, 1, 0xbbbbbb) # Meter scale is 0 - 100, with major tick every 20 units, minor tick every 10 units, and # micro tick every 5 units m.setScale(0, 100, 20, 10, 5) # Set the scale label style to 15pt Arial Italic. Set the major/minor/micro tick lengths to # 16/16/10 pixels pointing inwards, and their widths to 2/1/1 pixels. m.setLabelStyle("ariali.ttf", 16) m.setTickLength(-16, -16, -10) m.setLineWidth(0, 2, 1, 1) # Demostrate different types of color scales and putting them at different positions smoothColorScale = [0, 0x3333ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000] stepColorScale = [0, 0x00cc00, 60, 0xffdd00, 80, 0xee0000, 100] highLowColorScale = [0, 0x00ff00, 70, ChartDirector::Transparent, 100, 0xff0000] if chartIndex == 0 # Add the smooth color scale at the default position m.addColorScale(smoothColorScale) elsif chartIndex == 1 # Add the smooth color scale starting at radius 128 with zero width and ending at radius # 128 with 16 pixels inner width m.addColorScale(smoothColorScale, 128, 0, 128, -16) elsif chartIndex == 2 # Add the smooth color scale starting at radius 70 with zero width and ending at radius # 60 with 20 pixels outer width m.addColorScale(smoothColorScale, 70, 0, 60, 20) elsif chartIndex == 3 # Add the high/low color scale at the default position m.addColorScale(highLowColorScale) elsif chartIndex == 4 # Add the step color scale at the default position m.addColorScale(stepColorScale) else # Add the smooth color scale at radius 60 with 15 pixels outer width m.addColorScale(smoothColorScale, 60, 15) end # Add a text label centered at (150, 125) with 15pt Arial Italic font m.addText(150, 125, "CPU", "ariali.ttf", 15, ChartDirector::TextColor, ChartDirector::BottomCenter) # Add a red (0xff0000) pointer at the specified value m.addPointer2(value, 0xff0000) # 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 = 72.55 # Create an AngularMeter object of size 300 x 180 pixels with transparent background m = ChartDirector::AngularMeter.new(300, 180, ChartDirector::Transparent) # Set the default text and line colors to very dark grey (0x222222) m.setColor(ChartDirector::TextColor, 0x222222) m.setColor(ChartDirector::LineColor, 0x222222) # Center at (150, 150), scale radius = 128 pixels, scale angle -90 to +90 degrees m.setMeter(150, 150, 128, -90, 90) # Gradient color for the border to make it silver-like ringGradient = [1, 0x999999, 0.5, 0xdddddd, 0, 0xf8f8f8, -0.5, 0xdddddd, -1, 0x999999] # Background gradient color from white (0xffffff) at the center to light grey (0xdddddd) at the # border bgGradient = [0, 0xffffff, 0.75, 0xeeeeee, 1, 0xdddddd] # Add a scale background of 148 pixels radius using the gradient background, with a 10 pixel # thick silver border m.addScaleBackground(148, m.relativeRadialGradient(bgGradient, 148), 10, m.relativeLinearGradient(ringGradient, 45, 148)) # Add a 1 pixel light grey (0xbbbbbb) line at the inner edge of the thick silver border (radius # = 138) to enhance its contrast with the background gradient m.addScaleBackground(138, ChartDirector::Transparent, 1, 0xbbbbbb) # Meter scale is 0 - 100, with major tick every 20 units, minor tick every 10 units, and micro # tick every 5 units m.setScale(0, 100, 20, 10, 5) # Set the scale label style to 15pt Arial Italic. Set the major/minor/micro tick lengths to # 16/16/10 pixels pointing inwards, and their widths to 2/1/1 pixels. m.setLabelStyle("ariali.ttf", 16) m.setTickLength(-16, -16, -10) m.setLineWidth(0, 2, 1, 1) # Demostrate different types of color scales and putting them at different positions smoothColorScale = [0, 0x3333ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000] stepColorScale = [0, 0x00cc00, 60, 0xffdd00, 80, 0xee0000, 100] highLowColorScale = [0, 0x00ff00, 70, ChartDirector::Transparent, 100, 0xff0000] if chartIndex == 0 # Add the smooth color scale at the default position m.addColorScale(smoothColorScale) elsif chartIndex == 1 # Add the smooth color scale starting at radius 128 with zero width and ending at radius 128 # with 16 pixels inner width m.addColorScale(smoothColorScale, 128, 0, 128, -16) elsif chartIndex == 2 # Add the smooth color scale starting at radius 70 with zero width and ending at radius 60 # with 20 pixels outer width m.addColorScale(smoothColorScale, 70, 0, 60, 20) elsif chartIndex == 3 # Add the high/low color scale at the default position m.addColorScale(highLowColorScale) elsif chartIndex == 4 # Add the step color scale at the default position m.addColorScale(stepColorScale) else # Add the smooth color scale at radius 60 with 15 pixels outer width m.addColorScale(smoothColorScale, 60, 15) end # Add a text label centered at (150, 125) with 15pt Arial Italic font m.addText(150, 125, "CPU", "ariali.ttf", 15, ChartDirector::TextColor, ChartDirector::BottomCenter) # Add a red (0xff0000) pointer at the specified value m.addPointer2(value, 0xff0000) # Output the chart m.makeChart("whitesemicirclemeter%s.png" % chartIndex) end createChart(0) createChart(1) createChart(2) createChart(3) createChart(4) createChart(5) |