ChartDirector 6.0 (Ruby Edition)
Contour Color Legend
Source Code Listing
require("chartdirector") class ContourlegendController < ApplicationController def index() @title = "Contour Color Legend" @ctrl_file = File.expand_path(__FILE__) @noOfCharts = 1 render :template => "templates/chartview" end # # Render and deliver the chart # def getchart() # The x and y coordinates of the grid dataX = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] dataY = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] # Use random numbers for the z values on the XY grid r = ChartDirector::RanSeries.new(999) dataZ = r.get2DSeries(dataX.length, dataY.length, -0.9, 1.15) # Create a XYChart object of size 640 x 460 pixels c = ChartDirector::XYChart.new(640, 460) # Set the plotarea at (30, 25) and of size 400 x 400 pixels. Use semi-transparent grey # (0xdd000000) horizontal and vertical grid lines c.setPlotArea(50, 25, 400, 400, -1, -1, ChartDirector::Transparent, 0xdd000000, -1) # Set the x and y axis stems to transparent and the label font to 12pt Arial c.xAxis().setColors(ChartDirector::Transparent) c.yAxis().setColors(ChartDirector::Transparent) c.xAxis().setLabelStyle("arial.ttf", 12) c.yAxis().setLabelStyle("arial.ttf", 12) # Set the x-axis and y-axis scale c.xAxis().setLinearScale(0, 10, 1) c.yAxis().setLinearScale(0, 10, 1) # Add a contour layer using the given data layer = c.addContourLayer(dataX, dataY, dataZ) # Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer) # Define the color scale colorScale = [-0.8, 0x0066ff, -0.5, 0x66ccff, -0.3, 0x66ffff, 0, 0x88ff88, 0.4, 0x00ff00, 0.7, 0xffff00, 0.9, 0xff6600, 1.0, 0xcc0000, 1.1] # Apply the color scale, and specify the underflow and overflow colors for regions exceeding # the color scale layer.colorAxis().setColorScale(colorScale, 0x0000cc, 0x000000) # # Instead of displaying the color axis, we use a legend box to display the colors. This is # useful for colors that are unevenly spaced on the color axis. # # Add a legend box at (460, 25) with vertical layout, with 12pt Arial font, transparent # background and border, icon size of 15 x 15 pixels, and line spacing of 8 pixels. b = c.addLegend(460, 25, true, "arial.ttf", 12) b.setBackground(ChartDirector::Transparent, ChartDirector::Transparent) b.setKeySize(15, 15) b.setKeySpacing(0, 8) # Add the legend box entries b.addKey("> 1.1 (Critical)", 0x000000) b.addKey("1.0 to 1.1 (Alert)", 0xcc0000) b.addKey("0.9 to 1.0", 0xff6600) b.addKey("0.7 to 0.9", 0xffff00) b.addKey("0.4 to 0.7", 0x00ff00) b.addKey("0.0 to 0.4", 0x88ff88) b.addKey("-0.3 to 0.0", 0x66ffff) b.addKey("-0.5 to -0.3", 0x66ccff) b.addKey("-0.8 to -0.5", 0x0066ff) b.addKey("< -0.8", 0x0000cc) # Output the chart send_data(c.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") # The x and y coordinates of the grid dataX = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] dataY = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] # Use random numbers for the z values on the XY grid r = ChartDirector::RanSeries.new(999) dataZ = r.get2DSeries(dataX.length, dataY.length, -0.9, 1.15) # Create a XYChart object of size 640 x 460 pixels c = ChartDirector::XYChart.new(640, 460) # Set the plotarea at (30, 25) and of size 400 x 400 pixels. Use semi-transparent grey (0xdd000000) # horizontal and vertical grid lines c.setPlotArea(50, 25, 400, 400, -1, -1, ChartDirector::Transparent, 0xdd000000, -1) # Set the x and y axis stems to transparent and the label font to 12pt Arial c.xAxis().setColors(ChartDirector::Transparent) c.yAxis().setColors(ChartDirector::Transparent) c.xAxis().setLabelStyle("arial.ttf", 12) c.yAxis().setLabelStyle("arial.ttf", 12) # Set the x-axis and y-axis scale c.xAxis().setLinearScale(0, 10, 1) c.yAxis().setLinearScale(0, 10, 1) # Add a contour layer using the given data layer = c.addContourLayer(dataX, dataY, dataZ) # Move the grid lines in front of the contour layer c.getPlotArea().moveGridBefore(layer) # Define the color scale colorScale = [-0.8, 0x0066ff, -0.5, 0x66ccff, -0.3, 0x66ffff, 0, 0x88ff88, 0.4, 0x00ff00, 0.7, 0xffff00, 0.9, 0xff6600, 1.0, 0xcc0000, 1.1] # Apply the color scale, and specify the underflow and overflow colors for regions exceeding the # color scale layer.colorAxis().setColorScale(colorScale, 0x0000cc, 0x000000) # # Instead of displaying the color axis, we use a legend box to display the colors. This is useful # for colors that are unevenly spaced on the color axis. # # Add a legend box at (460, 25) with vertical layout, with 12pt Arial font, transparent background # and border, icon size of 15 x 15 pixels, and line spacing of 8 pixels. b = c.addLegend(460, 25, true, "arial.ttf", 12) b.setBackground(ChartDirector::Transparent, ChartDirector::Transparent) b.setKeySize(15, 15) b.setKeySpacing(0, 8) # Add the legend box entries b.addKey("> 1.1 (Critical)", 0x000000) b.addKey("1.0 to 1.1 (Alert)", 0xcc0000) b.addKey("0.9 to 1.0", 0xff6600) b.addKey("0.7 to 0.9", 0xffff00) b.addKey("0.4 to 0.7", 0x00ff00) b.addKey("0.0 to 0.4", 0x88ff88) b.addKey("-0.3 to 0.0", 0x66ffff) b.addKey("-0.5 to -0.3", 0x66ccff) b.addKey("-0.8 to -0.5", 0x0066ff) b.addKey("< -0.8", 0x0000cc) # Output the chart c.makeChart("contourlegend.png") |