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<%@ language="vbscript" %>
<%
Set cd = CreateObject("ChartDirector.API")

' 4 data points to represent the cash flow for the Q1 - Q4
data = Array(230, -140, 220, 330)

' We want to plot a waterfall chart showing the 4 quarters as well as the total
labels = Array("1st Quarter", "2nd Quarter", "3rd Quarter", "4th Quarter", "Total")

' The top side of the bars in a waterfall chart is the accumulated data. We use the
' ChartDirector ArrayMath utility to accumulate the data. The "total" is handled by
' inserting a zero point at the end before accumulation (after accumulation it will
' become the total).
boxTop = cd.ArrayMath(data).insert2(0, 1, UBound(data) + 1).acc().result()

' The botom side of the bars is just the top side of the previous bar. So we shifted
' the top side data to obtain the bottom side data.
boxBottom = cd.ArrayMath(boxTop).shift(1, 0).result()

' The last point (total) is different. Its bottom side is always 0.
boxBottom(UBound(boxBottom)) = 0

' In this example, we want to use different colors depending on the data is positive
' or negative.
posColor = &H00ff00
negColor = &Hff0000

' Create a XYChart object of size 500 x 280 pixels. Set background color to light
' blue (ccccff), with 1 pixel 3D border effect.
Set c = cd.XYChart(500, 300, &Hccccff, &H000000, 1)

' Add a title to the chart using 13 points Arial Bold Itatic font, with white
' (ffffff) text on a deep blue (0x80) background
Call c.addTitle("Corporate Cash Flow - Year 2004", "arialbi.ttf", 13, &Hffffff _
    ).setBackground(&H000080)

' Set the plotarea at (55, 50) and of size 430 x 215 pixels. Use alternative
' white/grey background.
Call c.setPlotArea(55, 50, 430, 215, &Hffffff, &Heeeeee)

' Add a legend box at (55, 25) using 8 pts Arial Bold font with horizontal layout,
' with transparent background and border color.
Set b = c.addLegend(55, 25, False, "arialbd.ttf", 8)
Call b.setBackground(cd.Transparent, cd.Transparent)

' Add keys to show the colors for positive and negative cash flows
Call b.addKey("Positive Cash Flow", posColor)
Call b.addKey("Negative Cash Flow", negColor)

' Set the labels on the x axis using Arial Bold font
Call c.xAxis().setLabels(labels).setFontStyle("arialbd.ttf")

' Set the x-axis ticks and grid lines to be between the bars
Call c.xAxis().setTickOffset(0.5)

' Use Arial Bold as the y axis label font
Call c.yAxis().setLabelStyle("arialbd.ttf")

' Add a title to the y axis
Call c.yAxis().setTitle("USD (in millions)")

' Add a box-whisker layer to represent the waterfall bars
Set layer = c.addBoxWhiskerLayer(boxTop, boxBottom)

' Color the bars depending on whether it is positive or negative
For i = 0 To UBound(boxTop)
    If boxTop(i) >= boxBottom(i) Then
        Call layer.setBoxColor(i, posColor)
    Else
        Call layer.setBoxColor(i, negColor)
    End If
Next

' Put data labels on the bars to show the cash flow using Arial Bold font
Call layer.setDataLabelFormat("{={top}-{bottom}}M")
Call layer.setDataLabelStyle("arialbd.ttf").setAlignment(cd.Center)

' Output the chart
Response.ContentType = "image/png"
Response.BinaryWrite c.makeChart2(cd.PNG)
Response.End
%>