ChartDirector 6.0 (Ruby Edition)
Color Horizontal Linear Meters
Source Code Listing
require("chartdirector") class ColorhlinearmeterController < ApplicationController def index() @title = "Color Horizontal Linear 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 = 74.25 # The background and border colors of the meters bgColor = [0xbbddff, 0xccffcc, 0xffccff, 0xffffaa, 0xffdddd, 0xeeeeee] borderColor = [0x000088, 0x006600, 0x6600aa, 0xee6600, 0x880000, 0x666666] # Create a LinearMeter object of size 250 x 75 pixels with a 3-pixel thick rounded frame m = ChartDirector::LinearMeter.new(250, 75, bgColor[chartIndex], borderColor[chartIndex]) m.setRoundedFrame(ChartDirector::Transparent) m.setThickFrame(3) # Set the scale region top-left corner at (14, 23), with size of 218 x 20 pixels. The scale # labels are located on the top (implies horizontal meter) m.setMeter(14, 23, 218, 20, ChartDirector::Top) # Set meter scale from 0 - 100, with a tick every 10 units m.setScale(0, 100, 10) # Demostrate different types of color scales and putting them at different positions smoothColorScale = [0, 0x6666ff, 25, 0x00bbbb, 50, 0x00ff00, 75, 0xffff00, 100, 0xff0000] stepColorScale = [0, 0x33ff33, 50, 0xffff33, 80, 0xff3333, 100] highLowColorScale = [0, 0x6666ff, 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 step color scale at the default position m.addColorScale(stepColorScale) elsif chartIndex == 2 # Add the high low scale at the default position m.addColorScale(highLowColorScale) elsif chartIndex == 3 # Add the smooth color scale starting at y = 23 (top of scale) with zero width and # ending at y = 23 with 20 pixels width m.addColorScale(smoothColorScale, 23, 0, 23, 20) elsif chartIndex == 4 # Add the smooth color scale starting at y = 33 (center of scale) with zero width and # ending at y = 23 with 20 pixels width m.addColorScale(smoothColorScale, 33, 0, 23, 20) else # Add the smooth color scale starting at y = 43 (bottom of scale) with zero width and # ending at y = 23 with 20 pixels width m.addColorScale(smoothColorScale, 43, 0, 23, 20) end # Add a blue (0x0000cc) pointer at the specified value m.addPointer(value, 0x0000cc) # Add a label left aligned to (10, 61) using 8pt Arial Bold font m.addText(10, 61, "Temperature C", "arialbd.ttf", 8, ChartDirector::TextColor, ChartDirector::Left) # Add a text box right aligned to (235, 61). Display the value using white (0xffffff) 8pt # Arial Bold font on a black (0x000000) background with depressed rounded border. t = m.addText(235, 61, m.formatValue(value, "2"), "arialbd.ttf", 8, 0xffffff, ChartDirector::Right) t.setBackground(0x000000, 0x000000, -1) t.setRoundedCorners(3) # 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 = 74.25 # The background and border colors of the meters bgColor = [0xbbddff, 0xccffcc, 0xffccff, 0xffffaa, 0xffdddd, 0xeeeeee] borderColor = [0x000088, 0x006600, 0x6600aa, 0xee6600, 0x880000, 0x666666] # Create a LinearMeter object of size 250 x 75 pixels with a 3-pixel thick rounded frame m = ChartDirector::LinearMeter.new(250, 75, bgColor[chartIndex], borderColor[chartIndex]) m.setRoundedFrame(ChartDirector::Transparent) m.setThickFrame(3) # Set the scale region top-left corner at (14, 23), with size of 218 x 20 pixels. The scale # labels are located on the top (implies horizontal meter) m.setMeter(14, 23, 218, 20, ChartDirector::Top) # Set meter scale from 0 - 100, with a tick every 10 units m.setScale(0, 100, 10) # Demostrate different types of color scales and putting them at different positions smoothColorScale = [0, 0x6666ff, 25, 0x00bbbb, 50, 0x00ff00, 75, 0xffff00, 100, 0xff0000] stepColorScale = [0, 0x33ff33, 50, 0xffff33, 80, 0xff3333, 100] highLowColorScale = [0, 0x6666ff, 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 step color scale at the default position m.addColorScale(stepColorScale) elsif chartIndex == 2 # Add the high low scale at the default position m.addColorScale(highLowColorScale) elsif chartIndex == 3 # Add the smooth color scale starting at y = 23 (top of scale) with zero width and ending at # y = 23 with 20 pixels width m.addColorScale(smoothColorScale, 23, 0, 23, 20) elsif chartIndex == 4 # Add the smooth color scale starting at y = 33 (center of scale) with zero width and ending # at y = 23 with 20 pixels width m.addColorScale(smoothColorScale, 33, 0, 23, 20) else # Add the smooth color scale starting at y = 43 (bottom of scale) with zero width and ending # at y = 23 with 20 pixels width m.addColorScale(smoothColorScale, 43, 0, 23, 20) end # Add a blue (0x0000cc) pointer at the specified value m.addPointer(value, 0x0000cc) # Add a label left aligned to (10, 61) using 8pt Arial Bold font m.addText(10, 61, "Temperature C", "arialbd.ttf", 8, ChartDirector::TextColor, ChartDirector::Left) # Add a text box right aligned to (235, 61). Display the value using white (0xffffff) 8pt Arial # Bold font on a black (0x000000) background with depressed rounded border. t = m.addText(235, 61, m.formatValue(value, "2"), "arialbd.ttf", 8, 0xffffff, ChartDirector::Right) t.setBackground(0x000000, 0x000000, -1) t.setRoundedCorners(3) # Output the chart m.makeChart("colorhlinearmeter%s.png" % chartIndex) end createChart(0) createChart(1) createChart(2) createChart(3) createChart(4) createChart(5) |