require("chartdirector")
class ScattertrendController < ApplicationController
def index()
@title = "Scatter Trend Chart"
@ctrl_file = File.expand_path(__FILE__)
@noOfCharts = 1
render :template => "templates/chartview"
end
#
# Render and deliver the chart
#
def getchart()
# The XY data of the first data series
dataX0 = [50, 55, 37, 24, 42, 49, 63, 72, 83, 59]
dataY0 = [3.6, 2.8, 2.5, 2.3, 3.8, 3.0, 3.8, 5.0, 6.0, 3.3]
# The XY data of the second data series
dataX1 = [50, 55, 37, 24, 42, 49, 63, 72, 83, 59]
dataY1 = [1.6, 1.8, 0.8, 0.5, 1.3, 1.5, 2.3, 2.4, 2.9, 1.5]
# Create a XYChart object of size 450 x 420 pixels
c = ChartDirector::XYChart.new(450, 420)
# Set the plotarea at (55, 65) and of size 350 x 300 pixels, with white background and a
# light grey border (0xc0c0c0). Turn on both horizontal and vertical grid lines with light
# grey color (0xc0c0c0)
c.setPlotArea(55, 65, 350, 300, 0xffffff, -1, 0xc0c0c0, 0xc0c0c0, -1)
# Add a legend box at (50, 30) (top of the chart) with horizontal layout. Use 12pt Times
# Bold Italic font. Set the background and border color to Transparent.
c.addLegend(50, 30, false, "timesbi.ttf", 12).setBackground(ChartDirector::Transparent)
# Add a title to the chart using 18 point Times Bold Itatic font.
c.addTitle("Server Performance", "timesbi.ttf", 18)
# Add titles to the axes using 12pt Arial Bold Italic font
c.yAxis().setTitle("Response Time (sec)", "arialbi.ttf", 12)
c.xAxis().setTitle("Server Load (TPS)", "arialbi.ttf", 12)
# Set the axes line width to 3 pixels
c.yAxis().setWidth(3)
c.xAxis().setWidth(3)
# Add a scatter layer using (dataX0, dataY0)
c.addScatterLayer(dataX0, dataY0, "Server AAA", ChartDirector::DiamondSymbol, 11, 0x008000)
# Add a trend line layer for (dataX0, dataY0)
c.addTrendLayer2(dataX0, dataY0, 0x008000).setLineWidth(3)
# Add a scatter layer for (dataX1, dataY1)
c.addScatterLayer(dataX1, dataY1, "Server BBB", ChartDirector::TriangleSymbol, 9, 0x6666ff)
# Add a trend line layer for (dataX1, dataY1)
c.addTrendLayer2(dataX1, dataY1, 0x6666ff).setLineWidth(3)
# Output the chart
send_data(c.makeChart2(ChartDirector::PNG), :type => "image/png", :disposition => "inline")
end
end |