require("chartdirector")
class Datatable2Controller < ApplicationController
def index()
@title = "Data Table (2)"
@ctrl_file = File.expand_path(__FILE__)
@noOfCharts = 1
render :template => "templates/chartview"
end
#
# Render and deliver the chart
#
def getchart()
# The data for the line chart
data0 = [410, 420, 500, 590]
data1 = [500, 370, 680, 850]
labels = ["Q1", "Q2", "Q3", "Q4"]
# Create a XYChart object of size 600 x 400 pixels
c = ChartDirector::XYChart.new(600, 400)
# Add a title to the chart using 18pt Times Bold Italic font
title = c.addTitle("Product Line Global Revenue", "timesbi.ttf", 18)
# Tentatively set the plotarea at (50, 55) and of (chart_width - 100) x (chart_height - 150)
# pixels in size. Use a vertical gradient color from sky blue (aaccff) t0 light blue
# (f9f9ff) as background. Set both horizontal and vertical grid lines to dotted
# semi-transprent black (aa000000).
plotArea = c.setPlotArea(50, 55, c.getWidth() - 100, c.getHeight() - 150,
c.linearGradientColor(0, 55, 0, 55 + c.getHeight() - 150, 0xaaccff, 0xf9fcff), -1, -1,
c.dashLineColor(0xaa000000, ChartDirector::DotLine), -1)
# Set y-axis title using 12 points Arial Bold Italic font, and set its position 10 pixels
# from the axis.
c.yAxis().setTitle("Revenue (USD millions)", "arialbi.ttf", 12)
c.yAxis().setTitlePos(ChartDirector::Left, 10)
# Set y-axis label style to 10 points Arial Bold and axis color to transparent
c.yAxis().setLabelStyle("arialbd.ttf", 10)
c.yAxis().setColors(ChartDirector::Transparent)
# Set y-axis tick density to 30 pixels. ChartDirector auto-scaling will use this as the
# guideline when putting ticks on the y-axis.
c.yAxis().setTickDensity(30)
# Add a bar layer to the chart with side layout
layer = c.addBarLayer2(ChartDirector::Side)
# Add two data sets to the bar layer
layer.addDataSet(data0, 0xff6600, "FY 2007")
layer.addDataSet(data1, 0x0088ff, "FY 2008")
# Use soft lighting effect with light direction from the left
layer.setBorderColor(ChartDirector::Transparent, ChartDirector::softLighting(
ChartDirector::Left))
# Set the x axis labels
c.xAxis().setLabels(labels)
# Convert the labels on the x-axis to a CDMLTable
table = c.xAxis().makeLabelTable()
# Set the default left/right margins to 5 pixels and top/bottom margins to 3 pixels. Set the
# default font size to 10 points
cellStyle = table.getStyle()
cellStyle.setMargin2(5, 5, 4, 3)
cellStyle.setFontSize(10)
# Set the first row to use Arial Bold font, with a light grey (eeeeee) background.
firstRowStyle = table.getRowStyle(0)
firstRowStyle.setFontStyle("arialbd.ttf")
firstRowStyle.setBackground(0xeeeeee, ChartDirector::LineColor)
#
# We can add more information to the table. In this sample code, we add the data series and
# the legend icons to the table.
#
# Add 3 more rows to the table. Set the background of the 2nd row to light grey (eeeeee).
table.appendRow()
table.appendRow().setBackground(0xeeeeee, ChartDirector::LineColor)
table.appendRow()
# Put the values of the 2 data series in the first 2 rows. Put the percentage differences in
# the 3rd row.
0.upto(data0.length - 1) do |i|
table.setText(i, 1, (data0[i]).to_s)
table.setText(i, 2, (data1[i]).to_s)
percentageDiff = 100.0 * (data1[i] - data0[i]) / data0[i]
# Use red or green color depending on whether the difference is positive or negative
formatString = "<*color=008800*>+{value|1}%"
if percentageDiff < 0
formatString = "<*color=cc0000*>{value|1}%"
end
table.setText(i, 3, c.formatValue(percentageDiff, formatString))
end
# Insert a column on the left for the legend icons using Arial Bold font.
table.insertCol(0).setFontStyle("arialbd.ttf")
# The top cell is set to transparent, so it is invisible
table.getCell(0, 0).setBackground(ChartDirector::Transparent, ChartDirector::Transparent)
# The next 2 cells are set to the legend icons and names of the 2 data series
table.setText(0, 1, sprintf("%s FY 2007", layer.getLegendIcon(0)))
table.setText(0, 2, sprintf("%s FY 2008", layer.getLegendIcon(1)))
# The last cell is set to "Change"
table.setText(0, 3, "Change")
# Append a column on the right for the total values.
table.appendCol()
# Put "Total" in the top cell as the heading of this column
table.setText(table.getColCount() - 1, 0, "Total")
# The next two cells are the total of the data series
total0 = ChartDirector::ArrayMath.new(data0).sum()
total1 = ChartDirector::ArrayMath.new(data1).sum()
table.setText(table.getColCount() - 1, 1, total0.to_s)
table.setText(table.getColCount() - 1, 2, total1.to_s)
# The last cell is the percentage differences of the total
totalPercentageDiff = (total1 - total0) / total0 * 100
# Use red or green color depending on whether the difference is positive or negative
totalFormatString = "<*color=008800*>+{value|1}%"
if totalPercentageDiff < 0
totalFormatString = "<*color=cc0000*>{value|1}%"
end
table.setText(table.getColCount() - 1, 3, c.formatValue(totalPercentageDiff,
totalFormatString))
#
# We now demonstrate how to adjust the plot area positions, to allow space for the newly
# inserted left and right columns in the table.
#
# We layout the axis first in order to get the axis metrics (including table metrics)
c.layoutAxes()
# If the first column is wider than the left y-axis, we need to reserve for some left margin
# to ensure the first column stays within the chart.
leftMargin = 0
if table.getColWidth(0) > c.yAxis().getThickness()
leftMargin = table.getColWidth(0) - c.yAxis().getThickness()
end
# Similarly, we need to reserve some right margin for the last column
rightMargin = table.getColWidth(table.getColCount() - 1)
# Adjust the plot area size, such that the bounding box (inclusive of axes) using the given
# left and right margin, plus 2 more pixels. Put the plot area 10 pixels below the title and
# use 2 pixels as the bottom margin. from the left, right and bottom edge, and is just under
# the legend box.
c.packPlotArea(leftMargin + 2, title.getHeight() + 10, c.getWidth() - 3 - rightMargin,
c.getHeight() - 3)
# After determining the exact plot area position, we may adjust title position so that it is
# centered relative to the plot area (instead of the chart)
title.setPos(plotArea.getLeftX() + (plotArea.getWidth() - title.getWidth()) / 2,
title.getTopY())
# Output the chart
send_data(c.makeChart2(ChartDirector::PNG), :type => "image/png", :disposition => "inline")
end
end |
