ChartDirector 6.0 (Ruby Edition)
Color Horizontal Bar Meters
Source Code Listing
require("chartdirector") class ColorhbarmeterController < ApplicationController def index() @title = "Color Horizontal Bar 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 = 75.35 # The background, border and bar colors of the meters bgColor = [0xbbddff, 0xccffcc, 0xffddff, 0xffffaa, 0xffdddd, 0xeeeeee] borderColor = [0x000088, 0x006600, 0x880088, 0xee6600, 0x880000, 0x666666] barColor = [0x0088ff, 0x00cc00, 0x8833dd, 0xff8800, 0xee3333, 0x888888] # Create a LinearMeter object of size 260 x 80 pixels with a 3-pixel thick rounded frame m = ChartDirector::LinearMeter.new(260, 80, bgColor[chartIndex], borderColor[chartIndex]) m.setRoundedFrame(ChartDirector::Transparent) m.setThickFrame(3) # Set the scale region top-left corner at (18, 24), with size of 222 x 20 pixels. The scale # labels are located on the top (implies horizontal meter) m.setMeter(18, 24, 222, 20, ChartDirector::Top) # Set meter scale from 0 - 100, with a tick every 10 units m.setScale(0, 100, 10) if chartIndex % 4 == 0 # Add a 5-pixel thick smooth color scale at y = 48 (below the meter scale) smoothColorScale = [0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000 ] m.addColorScale(smoothColorScale, 48, 5) elsif chartIndex % 4 == 1 # Add a 5-pixel thick step color scale at y = 48 (below the meter scale) stepColorScale = [0, 0x00cc00, 50, 0xffdd00, 80, 0xff3333, 100] m.addColorScale(stepColorScale, 48, 5) elsif chartIndex % 4 == 2 # Add a 5-pixel thick high/low color scale at y = 48 (below the meter scale) highLowColorScale = [0, 0x0000ff, 40, ChartDirector::Transparent, 60, ChartDirector::Transparent, 100, 0xff0000] m.addColorScale(highLowColorScale, 48, 5) else # Add a 5-pixel thick high only color scale at y = 48 (below the meter scale) highColorScale = [70, ChartDirector::Transparent, 100, 0xff0000] m.addColorScale(highColorScale, 48, 0, 48, 8) end # Add a bar from 0 to value with glass effect and 4 pixel rounded corners m.addBar(0, value, barColor[chartIndex], ChartDirector::glassEffect( ChartDirector::NormalGlare, ChartDirector::Top), 4) # Add a label right aligned to (243, 65) using 8pt Arial Bold font m.addText(243, 65, "Temperature C", "arialbd.ttf", 8, ChartDirector::TextColor, ChartDirector::Right) # Add a text box left aligned to (18, 65). Display the value using white (0xffffff) 8pt # Arial Bold font on a black (0x000000) background with depressed rounded border. t = m.addText(18, 65, m.formatValue(value, "2"), "arial.ttf", 8, 0xffffff, ChartDirector::Left) 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 = 75.35 # The background, border and bar colors of the meters bgColor = [0xbbddff, 0xccffcc, 0xffddff, 0xffffaa, 0xffdddd, 0xeeeeee] borderColor = [0x000088, 0x006600, 0x880088, 0xee6600, 0x880000, 0x666666] barColor = [0x0088ff, 0x00cc00, 0x8833dd, 0xff8800, 0xee3333, 0x888888] # Create a LinearMeter object of size 260 x 80 pixels with a 3-pixel thick rounded frame m = ChartDirector::LinearMeter.new(260, 80, bgColor[chartIndex], borderColor[chartIndex]) m.setRoundedFrame(ChartDirector::Transparent) m.setThickFrame(3) # Set the scale region top-left corner at (18, 24), with size of 222 x 20 pixels. The scale # labels are located on the top (implies horizontal meter) m.setMeter(18, 24, 222, 20, ChartDirector::Top) # Set meter scale from 0 - 100, with a tick every 10 units m.setScale(0, 100, 10) if chartIndex % 4 == 0 # Add a 5-pixel thick smooth color scale at y = 48 (below the meter scale) smoothColorScale = [0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000] m.addColorScale(smoothColorScale, 48, 5) elsif chartIndex % 4 == 1 # Add a 5-pixel thick step color scale at y = 48 (below the meter scale) stepColorScale = [0, 0x00cc00, 50, 0xffdd00, 80, 0xff3333, 100] m.addColorScale(stepColorScale, 48, 5) elsif chartIndex % 4 == 2 # Add a 5-pixel thick high/low color scale at y = 48 (below the meter scale) highLowColorScale = [0, 0x0000ff, 40, ChartDirector::Transparent, 60, ChartDirector::Transparent, 100, 0xff0000] m.addColorScale(highLowColorScale, 48, 5) else # Add a 5-pixel thick high only color scale at y = 48 (below the meter scale) highColorScale = [70, ChartDirector::Transparent, 100, 0xff0000] m.addColorScale(highColorScale, 48, 0, 48, 8) end # Add a bar from 0 to value with glass effect and 4 pixel rounded corners m.addBar(0, value, barColor[chartIndex], ChartDirector::glassEffect(ChartDirector::NormalGlare, ChartDirector::Top), 4) # Add a label right aligned to (243, 65) using 8pt Arial Bold font m.addText(243, 65, "Temperature C", "arialbd.ttf", 8, ChartDirector::TextColor, ChartDirector::Right) # Add a text box left aligned to (18, 65). Display the value using white (0xffffff) 8pt Arial # Bold font on a black (0x000000) background with depressed rounded border. t = m.addText(18, 65, m.formatValue(value, "2"), "arial.ttf", 8, 0xffffff, ChartDirector::Left) t.setBackground(0x000000, 0x000000, -1) t.setRoundedCorners(3) # Output the chart m.makeChart("colorhbarmeter%s.png" % chartIndex) end createChart(0) createChart(1) createChart(2) createChart(3) createChart(4) createChart(5) |