require("chartdirector")
class VlinearmeterorientationController < ApplicationController
def index()
@title = "V-Linear Meter Orientation"
@ctrl_file = File.expand_path(__FILE__)
@noOfCharts = 2
render :template => "templates/chartview"
end
#
# Render and deliver the chart
#
def getchart()
# This script can draw different charts depending on the chartIndex
chartIndex = (params["img"]).to_i
# The value to display on the meter
value = 75.35
# Create a LinearMeter object of size 70 x 240 pixels with very light grey (0xeeeeee)
# backgruond and a light grey (0xccccccc) 3-pixel thick rounded frame
m = ChartDirector::LinearMeter.new(70, 240, 0xeeeeee, 0xcccccc)
m.setRoundedFrame(ChartDirector::Transparent)
m.setThickFrame(3)
# This example demonstrates putting the text labels at the left or right side by setting the
# label alignment and scale position.
if chartIndex == 0
m.setMeter(28, 18, 20, 205, ChartDirector::Left)
else
m.setMeter(20, 18, 20, 205, ChartDirector::Right)
end
# Set meter scale from 0 - 100, with a tick every 10 units
m.setScale(0, 100, 10)
# Add a smooth color scale to the meter
smoothColorScale = [0, 0x6666ff, 25, 0x00bbbb, 50, 0x00ff00, 75, 0xffff00, 100, 0xff0000]
m.addColorScale(smoothColorScale)
# Add a blue (0x0000cc) pointer at the specified value
m.addPointer(value, 0x0000cc)
# Output the chart
send_data(m.makeChart2(ChartDirector::PNG), :type => "image/png", :disposition => "inline")
end
end |