require("chartdirector")
class XyzoomscrollController < ApplicationController
include ChartDirector::InteractiveChartSupport
private
#
# Initialize the WebChartViewer when the page is first loaded
#
def initViewer(viewer)
#
# In this example, we just use default values, so there is nothing to initialize.
#
end
#
# Draw the chart
#
def drawChart(viewer)
#
# For simplicity, in this demo, the data arrays are filled with hard coded data.
# In a real application, you may use a database or other data source to load up
# the arrays.
#
dataX0 = [10, 15, 6, -12, 14, -8, 13, -3, 16, 12, 10.5, -7, 3, -10, -5, 2, 5]
dataY0 = [130, 150, 80, 110, -110, -105, -130, -15, -170, 125, 125, 60, 25, 150,
150, 15, 120]
dataX1 = [6, 7, -4, 3.5, 7, 8, -9, -10, -12, 11, 8, -3, -2, 8, 4, -15, 15]
dataY1 = [65, -40, -40, 45, -70, -80, 80, 10, -100, 105, 60, 50, 20, 170, -25, 50,
75]
dataX2 = [-10, -12, 11, 8, 6, 12, -4, 3.5, 7, 8, -9, 3, -13, 16, -7.5, -10, -15]
dataY2 = [65, -80, -40, 45, -70, -80, 80, 90, -100, 105, 60, -75, -150, -40, 120,
-50, -30]
# Create an XYChart object 500 x 480 pixels in size, with light blue (c0c0ff) as
# background color
c = ChartDirector::XYChart.new(500, 480, 0xc0c0ff)
# Set the plotarea at (50, 40) and of size 400 x 400 pixels. Use light grey
# (c0c0c0) horizontal and vertical grid lines. Set 4 quadrant coloring, where the
# colors of the quadrants alternate between lighter and deeper grey
# (dddddd/eeeeee).
c.setPlotArea(50, 40, 400, 400, -1, -1, -1, 0xc0c0c0, 0xc0c0c0).set4QBgColor(
0xdddddd, 0xeeeeee, 0xdddddd, 0xeeeeee, 0x000000)
# As the data can lie outside the plotarea in a zoomed chart, we need enable
# clipping
c.setClipping()
# Set 4 quadrant mode, with both x and y axes symetrical around the origin
c.setAxisAtOrigin(ChartDirector::XYAxisAtOrigin,
ChartDirector::XAxisSymmetric + ChartDirector::YAxisSymmetric)
# Add a legend box at (450, 40) (top right corner of the chart) with vertical
# layout and 8 pts Arial Bold font. Set the background color to semi-transparent
# grey (40dddddd).
legendBox = c.addLegend(450, 40, true, "arialbd.ttf", 8)
legendBox.setAlignment(ChartDirector::TopRight)
legendBox.setBackground(0x40dddddd)
# Add titles to axes
c.xAxis().setTitle("Alpha Index")
c.yAxis().setTitle("Beta Index")
# Set axes line width to 2 pixels
c.xAxis().setWidth(2)
c.yAxis().setWidth(2)
# The default ChartDirector settings has a denser y-axis grid spacing and
# less-dense x-axis grid spacing. In this demo, we want the tick spacing to be
# symmetrical. We use around 40 pixels between major ticks and 20 pixels between
# minor ticks.
c.xAxis().setTickDensity(40, 20)
c.yAxis().setTickDensity(40, 20)
#
# In this example, we represent the data by scatter points. You may modify the
# code below to use other layer types (lines, areas, etc).
#
# Add scatter layer, using 11 pixels red (ff33333) X shape symbols
c.addScatterLayer(dataX0, dataY0, "Group A", ChartDirector::Cross2Shape(), 11,
0xff3333)
# Add scatter layer, using 11 pixels green (33ff33) circle symbols
c.addScatterLayer(dataX1, dataY1, "Group B", ChartDirector::CircleShape, 11,
0x33ff33)
# Add scatter layer, using 11 pixels blue (3333ff) triangle symbols
c.addScatterLayer(dataX2, dataY2, "Group C", ChartDirector::TriangleSymbol, 11,
0x3333ff)
#
# In this example, we have not explicitly configured the full x and y range. In
# this case, the first time syncLinearAxisWithViewPort is called, ChartDirector
# will auto-scale the axis and assume the resulting range is the full range. In
# subsequent calls, ChartDirector will set the axis range based on the view port
# and the full range.
#
viewer.syncLinearAxisWithViewPort("x", c.xAxis())
viewer.syncLinearAxisWithViewPort("y", c.yAxis())
# Create the image and save it in a session variable
session[viewer.getId()] = c.makeChart2(ChartDirector::PNG)
# Include tool tip for the chart
imageMap = c.getHTMLImageMap("", "",
"title='[{dataSetName}] Alpha = {x|G}, Beta = {value|G}'")
# Set the chart URL, image map and chart metrics to the viewer
viewer.setImageUrl(url_for(:action => "get_session_data", :id => viewer.getId(),
:nocache => rand))
viewer.setImageMap(imageMap)
viewer.setChartMetrics(c.getChartMetrics())
end
public
def index()
#
# This script handles both the full page request, as well as the subsequent
# partial updates (AJAX chart updates). We need to determine the type of request
# first before we processing it.
#
# Create the WebChartViewer object
@viewer = ChartDirector::WebChartViewer.new(request, "chart1")
if @viewer.isPartialUpdateRequest()
# Is a partial update request. Draw the chart and perform a partial response.
drawChart(@viewer)
send_data(@viewer.partialUpdateChart(), :type => "text/html; charset=utf-8",
:disposition => "inline")
return
end
#
# If the code reaches here, it is a full page request.
#
# In this exapmle, we just need to initialize the WebChartViewer and draw the
# chart.
initViewer(@viewer)
drawChart(@viewer)
end
end |