require("chartdirector")
class MultisymbollineController < ApplicationController
def index()
@title = "Multi-Symbol Line Chart"
@ctrl_file = File.expand_path(__FILE__)
@noOfCharts = 1
render :template => "templates/chartview"
end
#
# Render and deliver the chart
#
def getchart()
# In this example, the data points are unevenly spaced on the x-axis
dataY = [4.7, 4.7, 6.6, 2.2, 4.7, 4.0, 4.0, 5.1, 4.5, 4.5, 6.8, 4.5, 4, 2.1, 3,
2.5, 2.5, 3.1]
dataX = [Time.mktime(1999, 7, 1), Time.mktime(2000, 1, 1), Time.mktime(2000, 2, 1
), Time.mktime(2000, 4, 1), Time.mktime(2000, 5, 8), Time.mktime(2000, 7, 5),
Time.mktime(2001, 3, 5), Time.mktime(2001, 4, 7), Time.mktime(2001, 5, 9),
Time.mktime(2002, 2, 4), Time.mktime(2002, 4, 4), Time.mktime(2002, 5, 8),
Time.mktime(2002, 7, 7), Time.mktime(2002, 8, 30), Time.mktime(2003, 1, 2),
Time.mktime(2003, 2, 16), Time.mktime(2003, 11, 6), Time.mktime(2004, 1, 4)]
# Data points are assigned different symbols based on point type
pointType = [0, 1, 0, 1, 2, 1, 0, 0, 1, 1, 2, 2, 1, 0, 2, 1, 2, 0]
# Create a XYChart object of size 600 x 300 pixels, with a light purple (ffccff)
# background, black border, 1 pixel 3D border effect and rounded corners.
c = ChartDirector::XYChart.new(600, 300, 0xffccff, 0x000000, 1)
c.setRoundedFrame()
# Set the plotarea at (55, 58) and of size 520 x 195 pixels, with white (ffffff)
# background. Set horizontal and vertical grid lines to grey (cccccc).
c.setPlotArea(55, 58, 520, 195, 0xffffff, -1, -1, 0xcccccc, 0xcccccc)
# Add a legend box at (55, 30) (top of the chart) with horizontal layout. Use 10
# pts Arial Bold Italic font. Set the background and border color to Transparent.
c.addLegend(55, 30, false, "arialbi.ttf", 10).setBackground(
ChartDirector::Transparent)
# Add a title box to the chart using 15 pts Times Bold Italic font. The text is
# white (ffffff) on a purple (400040) background, with soft lighting effect from
# the right side.
c.addTitle("Multi-Symbol Line Chart Demo", "timesbi.ttf", 15, 0xffffff
).setBackground(0x400040, -1, ChartDirector::softLighting(ChartDirector::Right
))
# Set the y axis label format to display a percentage sign
c.yAxis().setLabelFormat("{value}%")
# Set axis titles to use 9pt Arial Bold Italic font
c.yAxis().setTitle("Axis Title Placeholder", "arialbi.ttf", 9)
c.xAxis().setTitle("Axis Title Placeholder", "arialbi.ttf", 9)
# Set axis labels to use Arial Bold font
c.yAxis().setLabelStyle("arialbd.ttf")
c.xAxis().setLabelStyle("arialbd.ttf")
# We add the different data symbols using scatter layers. The scatter layers are
# added before the line layer to make sure the data symbols stay on top of the
# line layer.
# We select the points with pointType = 0 (the non-selected points will be set to
# NoValue), and use yellow (ffff00) 15 pixels high 5 pointed star shape symbols
# for the points. (This example uses both x and y coordinates. For charts that
# have no x explicitly coordinates, use an empty array as dataX.)
c.addScatterLayer(dataX, ChartDirector::ArrayMath.new(dataY).selectEQZ(pointType,
ChartDirector::NoValue).result(), "Point Type 0", ChartDirector::StarShape(5),
15, 0xffff00)
# Similar to above, we select the points with pointType - 1 = 0 and use green
# (ff00) 13 pixels high six-sided polygon as symbols.
c.addScatterLayer(dataX, ChartDirector::ArrayMath.new(dataY).selectEQZ(
ChartDirector::ArrayMath.new(pointType).sub(1).result(),
ChartDirector::NoValue).result(), "Point Type 1", ChartDirector::PolygonShape(
6), 13, 0x00ff00)
# Similar to above, we select the points with pointType - 2 = 0 and use red
# (ff0000) 13 pixels high X shape as symbols.
c.addScatterLayer(dataX, ChartDirector::ArrayMath.new(dataY).selectEQZ(
ChartDirector::ArrayMath.new(pointType).sub(2).result(),
ChartDirector::NoValue).result(), "Point Type 2", ChartDirector::Cross2Shape(
), 13, 0xff0000)
# Finally, add a blue (0000ff) line layer with line width of 2 pixels
layer = c.addLineLayer(dataY, 0x0000ff)
layer.setXData(dataX)
layer.setLineWidth(2)
# output the chart
send_data(c.makeChart2(ChartDirector::PNG), :type => "image/png",
:disposition => "inline")
end
end |