require("chartdirector")
class EnhancedareaController < ApplicationController
def index()
@title = "Enhanced Area Chart"
@ctrl_file = File.expand_path(__FILE__)
@noOfCharts = 1
render :template => "templates/chartview"
end
#
# Render and deliver the chart
#
def getchart()
# The data for the area chart
data = [30, 28, 40, 55, 75, 68, 54, 60, 50, 62, 75, 65, 75, 89, 60, 55, 53, 35,
50, 66, 56, 48, 52, 65, 62]
# The labels for the area chart
labels = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
"13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24"]
# Create a XYChart object of size 600 x 300 pixels, with a pale blue (eeeeff)
# background, black border, 1 pixel 3D border effect and rounded corners.
c = ChartDirector::XYChart.new(600, 300, 0xeeeeff, 0x000000, 1)
c.setRoundedFrame()
# Set directory for loading images to current script directory
c.setSearchPath(File.dirname(__FILE__))
# Set the plotarea at (55, 55) and of size 520 x 195 pixels, with white (ffffff)
# background. Set horizontal and vertical grid lines to grey (cccccc).
c.setPlotArea(55, 55, 520, 195, 0xffffff, -1, -1, 0xcccccc, 0xcccccc)
# Add a title box to the chart using 15 pts Times Bold Italic font. The text is
# white (ffffff) on a deep blue (000088) background, with soft lighting effect
# from the right side.
c.addTitle(
"<*block,valign=absmiddle*><*img=star.png*><*img=star.png*> Performance " \
"Enhancer <*img=star.png*><*img=star.png*><*/*>", "timesbi.ttf", 15, 0xffffff
).setBackground(0x000088, -1, ChartDirector::softLighting(ChartDirector::Right
))
# Add a title to the y axis
c.yAxis().setTitle("Energy Concentration (KJ per liter)")
# Set the labels on the x axis.
c.xAxis().setLabels(labels)
# Display 1 out of 3 labels on the x-axis.
c.xAxis().setLabelStep(3)
# Add a title to the x axis using CDML
c.xAxis().setTitle(
"<*block,valign=absmiddle*><*img=clock.png*> Elapsed Time (hour)<*/*>")
# Set the axes width to 2 pixels
c.xAxis().setWidth(2)
c.yAxis().setWidth(2)
# Add an area layer to the chart using a gradient color that changes vertically
# from semi-transparent red (80ff0000) to semi-transparent white (80ffffff)
c.addAreaLayer(data, c.linearGradientColor(0, 50, 0, 255, 0x80ff0000, 0x80ffffff))
# Add a custom CDML text at the bottom right of the plot area as the logo
c.addText(575, 245,
"<*block,valign=absmiddle*><*img=small_molecule.png*> <*block*>" \
"<*font=timesbi.ttf,size=10,color=804040*>Molecular\nEngineering<*/*>"
).setAlignment(ChartDirector::BottomRight)
# output the chart
send_data(c.makeChart2(ChartDirector::PNG), :type => "image/png",
:disposition => "inline")
end
end |