require("chartdirector")
class Colorbar2Controller < ApplicationController
def index()
@title = "Multi-Color Bar Chart (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 bar chart
data = [85, 156, 179, 211, 123, 189, 166]
# The labels for the bar chart
labels = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]
# The colors for the bars
colors = [0x5588bb, 0x66bbbb, 0xaa6644, 0x99bb55, 0xee9944, 0x444466, 0xbb5555]
# Create a XYChart object of size 600 x 360 pixels
c = ChartDirector::XYChart.new(600, 360)
# Set the plotarea at (70, 20) and of size 500 x 300 pixels, with transparent background and
# border and light grey (0xcccccc) horizontal grid lines
c.setPlotArea(70, 20, 500, 300, ChartDirector::Transparent, -1, ChartDirector::Transparent,
0xcccccc)
# Set the x and y axis stems to transparent and the label font to 12pt Arial
c.xAxis().setColors(ChartDirector::Transparent)
c.yAxis().setColors(ChartDirector::Transparent)
c.xAxis().setLabelStyle("arial.ttf", 12)
c.yAxis().setLabelStyle("arial.ttf", 12)
# Add a multi-color bar chart layer using the given data
layer = c.addBarLayer3(data, colors)
# Use bar gradient lighting with the light intensity from 0.8 to 1.15
layer.setBorderColor(ChartDirector::Transparent, ChartDirector::barLighting(0.8, 1.15))
# Set rounded corners for bars
layer.setRoundedCorners()
# Set the labels on the x axis.
c.xAxis().setLabels(labels)
# For the automatic y-axis labels, set the minimum spacing to 40 pixels.
c.yAxis().setTickDensity(40)
# Add a title to the y axis using dark grey (0x555555) 14pt Arial font
c.yAxis().setTitle("Y-Axis Title Placeholder", "arial.ttf", 14, 0x555555)
# Output the chart
send_data(c.makeChart2(ChartDirector::PNG), :type => "image/png", :disposition => "inline")
end
end |