ChartDirector 7.0 (ASP/COM/VB Edition)

Sector Zones




This example demonstrates adding sector zones to a polar chart.

In ChartDirector, a zone defined on the angular axis will mark an angular range, and so will appear as sectors on a polar chart.

This example contains three sector zones in the plot area background, colored as red, yellow and green. The green region is the original background of the plot area, while the red and yellow regions are added using AngularAxis.addZone.

Source Code Listing

[Web Version (in ASP)] aspdemo\polarzones2.asp
<%@ language="vbscript" %> <% Set cd = CreateObject("ChartDirector.API") ' The data for the chart data = Array(5.1, 1.5, 5.1, 4.0, 1.7, 8.7, 9.4, 2.1, 3.5, 8.8, 5.0, 6.0) ' The labels for the chart labels = Array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", "Dec") ' Create a PolarChart object of size 400 x 420 pixels. with a metallic blue (9999ff) background ' color and 1 pixel 3D border Set c = cd.PolarChart(400, 420, cd.metalColor(&H9999ff), &H000000, 1) ' Add a title to the chart using 16pt Arial Bold Italic font. The title text is white (0xffffff) on ' deep blue (000080) background Call c.addTitle("Chemical Concentration", "Arial Bold Italic", 16, &Hffffff).setBackground( _ &H000080) ' Set center of plot area at (200, 240) with radius 145 pixels. Set background color to green ' (0x33ff33) Call c.setPlotArea(200, 240, 145, &H33ff33) ' Set the labels to the angular axis Call c.angularAxis().setLabels(labels) ' Color the sector between label index = 5.5 to 7.5 as red (ff3333) zone Call c.angularAxis().addZone(5.5, 7.5, &Hff3333) ' Color the sector between label index = 4.5 to 5.5, and also between 7.5 to 8.5, as yellow (ff3333) ' zones Call c.angularAxis().addZone(4.5, 5.5, &Hffff00) Call c.angularAxis().addZone(7.5, 8.5, &Hffff00) ' Set the grid style to circular grid Call c.setGridStyle(False) ' Use semi-transparent (40ffffff) label background so as not to block the data Call c.radialAxis().setLabelStyle().setBackground(&H40ffffff, &H40000000) ' Add a legend box at (200, 30) top center aligned, using 9pt Arial Bold font. with a black border. Set legendBox = c.addLegend(200, 30, False, "Arial Bold", 9) Call legendBox.setAlignment(cd.TopCenter) ' Add legend keys to represent the red/yellow/green zones Call legendBox.addKey("Very Dry", &Hff3333) Call legendBox.addKey("Critical", &Hffff00) Call legendBox.addKey("Moderate", &H33ff33) ' Add a blue (0x80) line layer with line width set to 3 pixels and use purple (ff00ff) cross symbols ' for the data points Set layer = c.addLineLayer(data, &H000080) Call layer.setLineWidth(3) Call layer.setDataSymbol(cd.Cross2Shape(), 15, &Hff00ff) ' Output the chart Set viewer = cd.WebChartViewer(Request, "chart1") Call viewer.setChart(c, cd.SVG) ' Include tool tip for the chart. viewer.ImageMap = layer.getHTMLImageMap("", "", "title='Concentration on {label}: {value} ppm'") %> <!DOCTYPE html> <html> <head> <title>Sector Zones</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;"> Sector Zones </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\polarzones2.cls
Public Sub createChart(viewer As Object, chartIndex As Integer) Dim cd As New ChartDirector.API ' The data for the chart Dim data() data = Array(5.1, 1.5, 5.1, 4.0, 1.7, 8.7, 9.4, 2.1, 3.5, 8.8, 5.0, 6.0) ' The labels for the chart Dim labels() labels = Array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", _ "Dec") ' Create a PolarChart object of size 400 x 420 pixels. with a metallic blue (9999ff) background ' color and 1 pixel 3D border Dim c As PolarChart Set c = cd.PolarChart(400, 420, cd.metalColor(&H9999ff), &H000000, 1) ' Add a title to the chart using 16pt Arial Bold Italic font. The title text is white (0xffffff) ' on deep blue (000080) background Call c.addTitle("Chemical Concentration", "arialbi.ttf", 16, &Hffffff).setBackground(&H000080) ' Set center of plot area at (200, 240) with radius 145 pixels. Set background color to green ' (0x33ff33) Call c.setPlotArea(200, 240, 145, &H33ff33) ' Set the labels to the angular axis Call c.angularAxis().setLabels(labels) ' Color the sector between label index = 5.5 to 7.5 as red (ff3333) zone Call c.angularAxis().addZone(5.5, 7.5, &Hff3333) ' Color the sector between label index = 4.5 to 5.5, and also between 7.5 to 8.5, as yellow ' (ff3333) zones Call c.angularAxis().addZone(4.5, 5.5, &Hffff00) Call c.angularAxis().addZone(7.5, 8.5, &Hffff00) ' Set the grid style to circular grid Call c.setGridStyle(False) ' Use semi-transparent (40ffffff) label background so as not to block the data Call c.radialAxis().setLabelStyle().setBackground(&H40ffffff, &H40000000) ' Add a legend box at (200, 30) top center aligned, using 9pt Arial Bold font. with a black ' border. Dim legendBox As LegendBox Set legendBox = c.addLegend(200, 30, False, "arialbd.ttf", 9) Call legendBox.setAlignment(cd.TopCenter) ' Add legend keys to represent the red/yellow/green zones Call legendBox.addKey("Very Dry", &Hff3333) Call legendBox.addKey("Critical", &Hffff00) Call legendBox.addKey("Moderate", &H33ff33) ' Add a blue (0x80) line layer with line width set to 3 pixels and use purple (ff00ff) cross ' symbols for the data points Dim layer As PolarLineLayer Set layer = c.addLineLayer(data, &H000080) Call layer.setLineWidth(3) Call layer.setDataSymbol(cd.Cross2Shape(), 15, &Hff00ff) ' Output the chart Set viewer.Picture = c.makePicture() ' Include tool tip for the chart. viewer.ImageMap = layer.getHTMLImageMap("clickable", "", _ "title='Concentration on {label}: {value} ppm'") End Sub