ChartDirector 6.0 (Ruby Edition)
V-Bar Meter Orientation
Source Code Listing
require("chartdirector") class VbarmeterorientationController < ApplicationController def index() @title = "V-Bar Meter Orientation" @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 = 74.25 # Bar colors of the meters barColor = [0x2299ff, 0x00ee00, 0xaa66ee, 0xff7711] # Create a LinearMeter object of size 70 x 240 pixels with very light grey (0xeeeeee) # backgruond and a grey (0xaaaaaa) 3-pixel thick rounded frame m = ChartDirector::LinearMeter.new(70, 240, 0xeeeeee, 0xaaaaaa) m.setRoundedFrame(ChartDirector::Transparent) m.setThickFrame(3) # This example demonstrates putting the text labels at the left or right side of the meter # scale, and putting the color scale on the same side as the labels or on opposite side. alignment = [ChartDirector::Left, ChartDirector::Left, ChartDirector::Right, ChartDirector::Right] meterXPos = [28, 38, 12, 21] labelGap = [2, 12, 10, 2] colorScalePos = [53, 28, 36, 10] # Configure the position of the meter scale and which side to put the text labels m.setMeter(meterXPos[chartIndex], 18, 20, 205, alignment[chartIndex]) # Set meter scale from 0 - 100, with a tick every 10 units m.setScale(0, 100, 10) # To put the color scale on the same side as the text labels, we need to increase the gap # between the labels and the meter scale to make room for the color scale m.setLabelPos(false, labelGap[chartIndex]) # Add a smooth color scale to the meter smoothColorScale = [0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000] m.addColorScale(smoothColorScale, colorScalePos[chartIndex], 6) # 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::Left), 4) # 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 # Bar colors of the meters barColor = [0x2299ff, 0x00ee00, 0xaa66ee, 0xff7711] # Create a LinearMeter object of size 70 x 240 pixels with very light grey (0xeeeeee) backgruond # and a grey (0xaaaaaa) 3-pixel thick rounded frame m = ChartDirector::LinearMeter.new(70, 240, 0xeeeeee, 0xaaaaaa) m.setRoundedFrame(ChartDirector::Transparent) m.setThickFrame(3) # This example demonstrates putting the text labels at the left or right side of the meter # scale, and putting the color scale on the same side as the labels or on opposite side. alignment = [ChartDirector::Left, ChartDirector::Left, ChartDirector::Right, ChartDirector::Right] meterXPos = [28, 38, 12, 21] labelGap = [2, 12, 10, 2] colorScalePos = [53, 28, 36, 10] # Configure the position of the meter scale and which side to put the text labels m.setMeter(meterXPos[chartIndex], 18, 20, 205, alignment[chartIndex]) # Set meter scale from 0 - 100, with a tick every 10 units m.setScale(0, 100, 10) # To put the color scale on the same side as the text labels, we need to increase the gap # between the labels and the meter scale to make room for the color scale m.setLabelPos(false, labelGap[chartIndex]) # Add a smooth color scale to the meter smoothColorScale = [0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000] m.addColorScale(smoothColorScale, colorScalePos[chartIndex], 6) # 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::Left), 4) # Output the chart m.makeChart("vbarmeterorientation%s.png" % chartIndex) end createChart(0) createChart(1) createChart(2) createChart(3) |