ChartDirector 7.0 (ASP/COM/VB Edition)

Stacked Area Chart




This example demonstrates using multiple data sets to create stacked area chart.

The key features demonstrated in this example are:

Source Code Listing

[Web Version (in ASP)] aspdemo\stackedarea.asp
<%@ language="vbscript" %> <% Set cd = CreateObject("ChartDirector.API") ' The data for the area chart data0 = Array(42, 49, 33, 38, 51, 46, 29, 41, 44, 57, 59, 52, 37, 34, 51, 56, 56, 60, 70, 76, 63, _ 67, 75, 64, 51) data1 = Array(50, 45, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67, 67, 58, 59, 73, 77, 84, _ 82, 80, 84, 89) data2 = Array(61, 79, 85, 66, 53, 39, 24, 21, 37, 56, 37, 22, 21, 33, 13, 17, 4, 23, 16, 25, 9, _ 10, 5, 7, 16) labels = Array("0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", _ "15", "16", "17", "18", "19", "20", "21", "22", "23", "24") ' Create a XYChart object of size 300 x 210 pixels. Set the background to pale yellow (0xffffc0) ' with a black border (0x0) Set c = cd.XYChart(300, 210, &Hffffc0, &H000000) ' Set the plotarea at (50, 30) and of size 240 x 140 pixels. Use white (0xffffff) background. Call c.setPlotArea(50, 30, 240, 140).setBackground(&Hffffff) ' Add a legend box at (50, 185) (below of plot area) using horizontal layout. Use 8pt Arial font ' with Transparent background. Call c.addLegend(50, 185, False, "", 8).setBackground(cd.Transparent) ' Add a title box to the chart using 8pt Arial Bold font, with yellow (0xffff40) background and a ' black border (0x0) Call c.addTitle("Sales Volume", "Arial Bold", 8).setBackground(&Hffff40, 0) ' Set the y axis label format to US$nnnn Call c.yAxis().setLabelFormat("US${value}") ' Set the labels on the x axis. Call c.xAxis().setLabels(labels) ' Display 1 out of 2 labels on the x-axis. Show minor ticks for remaining labels. Call c.xAxis().setLabelStep(2, 1) ' Add an stack area layer with three data sets Set layer = c.addAreaLayer2(cd.Stack) Call layer.addDataSet(data0, &H4040ff, "Store #1") Call layer.addDataSet(data1, &Hff4040, "Store #2") Call layer.addDataSet(data2, &H40ff40, "Store #3") ' Output the chart Set viewer = cd.WebChartViewer(Request, "chart1") Call viewer.setChart(c, cd.SVG) ' Include tool tip for the chart viewer.ImageMap = c.getHTMLImageMap("", "", _ "title='{dataSetName} sales at hour {xLabel}: US${value}K'") %> <!DOCTYPE html> <html> <head> <title>Stacked Area Chart</title> <!-- Include ChartDirector Javascript Library to support chart interactions --> <script type="text/javascript" src="cdjcv.js"></script> </head> <body style="margin:5px 0px 0px 5px"> <div style="font:bold 18pt verdana;"> Stacked Area Chart </div> <hr style="border:solid 1px #000080; background:#000080" /> <div style="font:10pt verdana; margin-bottom:1.5em"> <a href="viewsource.asp?file=<%= Request("SCRIPT_NAME") %>">View Chart Source Code</a> </div> <!-- ****** Here is the chart image ****** --> <%= viewer.renderHTML() %> </body> </html>

[Windows Version (in Visual Basic)] vbdemo\stackedarea.cls
Public Sub createChart(viewer As Object, chartIndex As Integer) Dim cd As New ChartDirector.API ' The data for the area chart Dim data0() data0 = Array(42, 49, 33, 38, 51, 46, 29, 41, 44, 57, 59, 52, 37, 34, 51, 56, 56, 60, 70, 76, _ 63, 67, 75, 64, 51) Dim data1() data1 = Array(50, 45, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67, 67, 58, 59, 73, 77, _ 84, 82, 80, 84, 89) Dim data2() data2 = Array(61, 79, 85, 66, 53, 39, 24, 21, 37, 56, 37, 22, 21, 33, 13, 17, 4, 23, 16, 25, _ 9, 10, 5, 7, 16) Dim labels() labels = Array("0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", _ "15", "16", "17", "18", "19", "20", "21", "22", "23", "24") ' Create a XYChart object of size 300 x 210 pixels. Set the background to pale yellow (0xffffc0) ' with a black border (0x0) Dim c As XYChart Set c = cd.XYChart(300, 210, &Hffffc0, &H000000) ' Set the plotarea at (50, 30) and of size 240 x 140 pixels. Use white (0xffffff) background. Call c.setPlotArea(50, 30, 240, 140).setBackground(&Hffffff) ' Add a legend box at (50, 185) (below of plot area) using horizontal layout. Use 8pt Arial font ' with Transparent background. Call c.addLegend(50, 185, False, "", 8).setBackground(cd.Transparent) ' Add a title box to the chart using 8pt Arial Bold font, with yellow (0xffff40) background and ' a black border (0x0) Call c.addTitle("Sales Volume", "arialbd.ttf", 8).setBackground(&Hffff40, 0) ' Set the y axis label format to US$nnnn Call c.yAxis().setLabelFormat("US${value}") ' Set the labels on the x axis. Call c.xAxis().setLabels(labels) ' Display 1 out of 2 labels on the x-axis. Show minor ticks for remaining labels. Call c.xAxis().setLabelStep(2, 1) ' Add an stack area layer with three data sets Dim layer As AreaLayer Set layer = c.addAreaLayer2(cd.Stack) Call layer.addDataSet(data0, &H4040ff, "Store #1") Call layer.addDataSet(data1, &Hff4040, "Store #2") Call layer.addDataSet(data2, &H40ff40, "Store #3") ' Output the chart Set viewer.Picture = c.makePicture() 'include tool tip for the chart viewer.ImageMap = c.getHTMLImageMap("clickable", "", _ "title='{dataSetName} sales at hour {xLabel}: US${value}K'") End Sub