require("chartdirector")
class BinaryseriesController < ApplicationController
def index()
@title = "Binary Data Series"
@ctrl_file = File.expand_path(__FILE__)
@noOfCharts = 1
render :template => "templates/chartview"
end
#
# Render and deliver the chart
#
def getchart()
# The data for the chart
dataY = [1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1]
dataX = [Time.mktime(2008, 7, 1, 0, 0, 0), Time.mktime(2008, 7, 1, 2, 17, 2), Time.mktime(
2008, 7, 1, 8, 5, 30), Time.mktime(2008, 7, 1, 10, 54, 10), Time.mktime(2008, 7, 1, 15,
40, 0), Time.mktime(2008, 7, 1, 18, 22, 20), Time.mktime(2008, 7, 1, 22, 17, 14),
Time.mktime(2008, 7, 2, 2, 55, 50), Time.mktime(2008, 7, 2, 8, 17, 14), Time.mktime(
2008, 7, 2, 11, 55, 50), Time.mktime(2008, 7, 2, 13, 17, 14), Time.mktime(2008, 7, 2,
17, 55, 50), Time.mktime(2008, 7, 2, 20, 17, 14), Time.mktime(2008, 7, 3, 0, 0, 0)]
# In this example, we only use position 1, 3, 5 for the data series. Positions 0, 2, 4, 6
# are empty and serve as gaps.
labels = ["", "ON Only Filling", "",
"<*font,color=cc2200*>ON<*/font*> / <*font,color=00aa22*>OFF<*/font*> Filling", "",
"Logic Line", ""]
# Create a XYChart object of size 600 x 180 pixels
c = ChartDirector::XYChart.new(600, 180)
# Add a title to the chart using 10 points Arial Bold font. Set top/bottom margins to 12
# pixels.
title = c.addTitle("Binary Data Series Demonstration", "arialbd.ttf", 10)
# Tentatively set the plotarea at (100, 30) and of size 470 x 120 pixels. Use transparent
# border. Use grey (888888) solid line and light grey (ccccc) dotted line as major and minor
# vertical grid lines.
c.setPlotArea(100, 30, 470, 120, -1, -1, ChartDirector::Transparent).setGridColor(
ChartDirector::Transparent, 0x888888, ChartDirector::Transparent, c.dashLineColor(
0xcccccc, ChartDirector::DotLine))
# Set axes to transparent
c.xAxis().setColors(ChartDirector::Transparent)
c.yAxis().setColors(ChartDirector::Transparent)
# Set the y axis labels
c.yAxis().setLabels(labels)
# Set y-axis label style to 8pt Arial Bold
c.yAxis().setLabelStyle("arialbd.ttf", 8)
# Set x-axis major and minor tick density to 50 and 5 pixels. ChartDirector auto-scaling
# will use this as the guideline when putting ticks on the x-axis.
c.xAxis().setTickDensity(50, 5)
# Use "<*font=Arial Bold*>{value|mmm dd}" for the first label of an hour, and
# "{value|hh:nn}" for all other labels.
c.xAxis().setMultiFormat(ChartDirector::StartOfDayFilter(),
"<*font=arialbd.ttf*>{value|mmm dd}", ChartDirector::AllPassFilter(), "{value|hh:nn}")
#
# A Logic Line can be achieved using a StepLineLayer in ChartDirector
#
# Shift the data by 4.5, so instead of 0 - 1, it is now 4.5 to 5.5, or fluctuate around the
# y = 5 (Logic Line label) position.
shiftedLine0 = ChartDirector::ArrayMath.new(dataY).add(4.5).result()
# Add step lines using the original and the reversed data
layer0 = c.addStepLineLayer(shiftedLine0, 0x0000ff)
layer0.setXData(dataX)
#
# To perform ON/OFF filling, we draw the logic line, and its reverse, and fill the region in
# between
#
# Shift the data by 2.5, so instead of 0 - 1, it is now 2.5 to 3.5, or fluctuate around the
# y = 3 (ON/OFF Filing label) position.
shiftedLine1 = ChartDirector::ArrayMath.new(dataY).add(2.5).result()
# Reverse the data, so the 0 becomes 1 and 1 becomes 0, and shift it as well.
reverseShiftedLine1 = ChartDirector::ArrayMath.new(dataY).mul(-1).add(3.5).result()
# Add step lines using the original and the reversed data
layer1 = c.addStepLineLayer(shiftedLine1, ChartDirector::Transparent)
layer1.addDataSet(reverseShiftedLine1, ChartDirector::Transparent)
layer1.setXData(dataX)
# Fill the region between the two step lines with green (00aa22) or red (cc2200), depending
# on whether the original or the reserve is higher.
c.addInterLineLayer(layer1.getLine(0), layer1.getLine(1), 0x00aa22, 0xcc2200)
#
# The ON Only filling is the same as ON/OFF filling, except the OFF filling color is
# transparent
#
# Shift the data by 0.5, so instead of 0 - 1, it is now 0.5 to 1.5, or fluctuate around the
# y = 1 (ON Only Filing label) position.
shiftedLine2 = ChartDirector::ArrayMath.new(dataY).add(0.5).result()
# Reverse the data, so the 0 becomes 1 and 1 becomes 0, and shift it as well.
reverseShiftedLine2 = ChartDirector::ArrayMath.new(dataY).mul(-1).add(1.5).result()
# Add step lines using the original and the reversed data
layer2 = c.addStepLineLayer(shiftedLine2, ChartDirector::Transparent)
layer2.addDataSet(reverseShiftedLine2, ChartDirector::Transparent)
layer2.setXData(dataX)
# Fill the region between the two step lines with green (00aa22) or transparent, depending
# on whether the original or the reserve is higher.
c.addInterLineLayer(layer2.getLine(0), layer2.getLine(1), 0x00aa22,
ChartDirector::Transparent)
# Adjust the plot area size, such that the bounding box (inclusive of axes) is 10 pixels
# from the left edge, 10 pixels below the title, 30 pixels from the right edge, and 10
# pixels above the bottom edge.
c.packPlotArea(10, title.getHeight() + 10, c.getWidth() - 30, c.getHeight() - 10)
# Output the chart
send_data(c.makeChart2(ChartDirector::PNG), :type => "image/png", :disposition => "inline")
end
end |
