ChartDirector 7.0 (ASP/COM/VB Edition)

Custom Scatter Labels




This example demonstrates adding custom labels to data points.

Source Code Listing

[Web Version (in ASP)] aspdemo\scatterlabels.asp
<%@ language="vbscript" %> <% Set cd = CreateObject("ChartDirector.API") ' The XY points for the scatter chart dataX = Array(150, 400, 300, 1500, 800) dataY = Array(0.6, 8, 5.4, 2, 4) ' The labels for the points labels = Array("Nano<*br*>100", "SpeedTron<*br*>200 Lite", "SpeedTron<*br*>200", _ "Marathon<*br*>Extra", "Marathon<*br*>2000") ' Create a XYChart object of size 450 x 400 pixels Set c = cd.XYChart(450, 400) ' Set the plotarea at (55, 40) and of size 350 x 300 pixels, with a light grey border (0xc0c0c0). ' Turn on both horizontal and vertical grid lines with light grey color (0xc0c0c0) Call c.setPlotArea(55, 40, 350, 300, &Hffffff, -1, &Hc0c0c0, &Hc0c0c0, -1) ' Add a title to the chart using 18pt Times Bold Itatic font. Call c.addTitle("Product Comparison Chart", "Times New Roman Bold Italic", 18) ' Add a title to the y axis using 12pt Arial Bold Italic font Call c.yAxis().setTitle("Capacity (tons)", "Arial Bold Italic", 12) ' Add a title to the x axis using 12pt Arial Bold Italic font Call c.xAxis().setTitle("Range (miles)", "Arial Bold Italic", 12) ' Set the axes line width to 3 pixels Call c.xAxis().setWidth(3) Call c.yAxis().setWidth(3) ' Add the data as a scatter chart layer, using a 15 pixel circle as the symbol Set layer = c.addScatterLayer(dataX, dataY, "", cd.GlassSphereShape, 15, &Hff3333, &Hff3333) ' Add labels to the chart as an extra field Call layer.addExtraField(labels) ' Set the data label format to display the extra field Call layer.setDataLabelFormat("{field0}") ' Use 8pt Arial Bold to display the labels Set textbox = layer.setDataLabelStyle("Arial Bold", 8) ' Set the background to purple with a 1 pixel 3D border Call textbox.setBackground(&Hcc99ff, cd.Transparent, 1) ' Put the text box 4 pixels to the right of the data point Call textbox.setAlignment(cd.Left) Call textbox.setPos(4, 0) ' 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='Range = {x} miles, Capacity = {value} tons'") %> <!DOCTYPE html> <html> <head> <title>Custom Scatter Labels</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;"> Custom Scatter Labels </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\scatterlabels.cls
Public Sub createChart(viewer As Object, chartIndex As Integer) Dim cd As New ChartDirector.API ' The XY points for the scatter chart Dim dataX() dataX = Array(150, 400, 300, 1500, 800) Dim dataY() dataY = Array(0.6, 8, 5.4, 2, 4) ' The labels for the points Dim labels() labels = Array("Nano<*br*>100", "SpeedTron<*br*>200 Lite", "SpeedTron<*br*>200", _ "Marathon<*br*>Extra", "Marathon<*br*>2000") ' Create a XYChart object of size 450 x 400 pixels Dim c As XYChart Set c = cd.XYChart(450, 400) ' Set the plotarea at (55, 40) and of size 350 x 300 pixels, with a light grey border ' (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color (0xc0c0c0) Call c.setPlotArea(55, 40, 350, 300, &Hffffff, -1, &Hc0c0c0, &Hc0c0c0, -1) ' Add a title to the chart using 18pt Times Bold Itatic font. Call c.addTitle("Product Comparison Chart", "timesbi.ttf", 18) ' Add a title to the y axis using 12pt Arial Bold Italic font Call c.yAxis().setTitle("Capacity (tons)", "arialbi.ttf", 12) ' Add a title to the x axis using 12pt Arial Bold Italic font Call c.xAxis().setTitle("Range (miles)", "arialbi.ttf", 12) ' Set the axes line width to 3 pixels Call c.xAxis().setWidth(3) Call c.yAxis().setWidth(3) ' Add the data as a scatter chart layer, using a 15 pixel circle as the symbol Dim layer As ScatterLayer Set layer = c.addScatterLayer(dataX, dataY, "", cd.GlassSphereShape, 15, &Hff3333, &Hff3333) ' Add labels to the chart as an extra field Call layer.addExtraField(labels) ' Set the data label format to display the extra field Call layer.setDataLabelFormat("{field0}") ' Use 8pt Arial Bold to display the labels Dim textbox As ChartDirector.TextBox Set textbox = layer.setDataLabelStyle("arialbd.ttf", 8) ' Set the background to purple with a 1 pixel 3D border Call textbox.setBackground(&Hcc99ff, cd.Transparent, 1) ' Put the text box 4 pixels to the right of the data point Call textbox.setAlignment(cd.Left) Call textbox.setPos(4, 0) ' Output the chart Set viewer.Picture = c.makePicture() 'include tool tip for the chart viewer.ImageMap = c.getHTMLImageMap("clickable", "", _ "title='Range = {x} miles, Capacity = {value} tons'") End Sub