This example extends the
Simple Line Chart example by decorating the chart using a number of chart formatting features.
In this example, random data is used. They are generated using a ChartDirector utility class
RanTable. RanTable simulates a database table with the cells filled with random numbers. The columns of the table can be retrieved as arrays using
RanTable.getCol.
[Web Version (in ASP)] aspdemo\compactline.asp
<%@ language="vbscript" %>
<%
Set cd = CreateObject("ChartDirector.API")
'
' We use a random number generator to simulate the data from 9:30am to 4:30pm with one data point
' every 4 minutes. The total number of points during that period is 106. (7 hours x 15
' points/hour + 1)
'
noOfPoints = 106
' Assume we have not reached the end of the day yet, and only 85 points are available. Create a
' random table object of 1 col x 85 rows, using 9 as seed.
Set rantable = cd.RanTable(9, 1, 85)
' Set the 1st column to start with 1800 and with random delta from -5 to 5.
Call rantable.setCol(0, 1800, -5, 5)
' Get the data as the 1st column of the random table
data = rantable.getCol(0)
' The x-axis labels for the chart
labels = Array("-", "10am", "-", " ", "-", "12am", "-", " ", "-", "2pm", "-", " ", "-", "4pm", "-")
'
' Now we obtain the data into arrays, we can start to draw the chart using ChartDirector
'
' Create a XYChart object of size 180 x 180 pixels with a blue background (0x9c9cce)
Set c = cd.XYChart(180, 180, &H9c9cce)
' Add titles to the top and bottom of the chart using 7.5pt Arial font. The text is white 0xffffff
' on a deep blue 0x31319C background.
Call c.addTitle2(cd.Top, "STAR TECH INDEX 2003-01-28", "Arial", 7.5, &Hffffff, &H31319c)
Call c.addTitle2(cd.Bottom, "LATEST STI:1809.41 (+14.51)", "Arial", 7.5, &Hffffff, &H31319c)
' Set the plotarea at (31, 21) and of size 145 x 124 pixels, with a pale yellow (0xffffc8)
' background.
Call c.setPlotArea(31, 21, 145, 124, &Hffffc8)
' Add custom text at (176, 21) (top right corner of plotarea) using 11pt Times Bold Italic font/red
' (0xc09090) color
Call c.addText(176, 21, "Chart Demo", "Times New Roman Bold Italic", 11, &Hc09090).setAlignment( _
cd.TopRight)
' Use 7.5pt Arial as the y axis label font
Call c.yAxis().setLabelStyle("", 7.5)
' Set the labels on the x axis by spreading the labels evenly between the first point (index = 0)
' and the last point (index = noOfPoints - 1)
Call c.xAxis().setLinearScale(0, noOfPoints - 1, labels)
' Use 7.5pt Arial as the x axis label font
Call c.xAxis().setLabelStyle("", 7.5)
' Add a deep blue (0x000080) line layer to the chart
Call c.addLineLayer(data, &H000080)
' Output the chart
Set viewer = cd.WebChartViewer(Request, "chart1")
Call viewer.setChart(c, cd.SVG)
' Include tool tip for the chart. The chart starts at 9:30am and each point spans 240 seconds, so we
' can compute the time as {x}*240+9.5*3600.
viewer.ImageMap = c.getHTMLImageMap("", "", "title='{={x}*240+9.5*3600|h:nna}: {value|2}'")
%>
<!DOCTYPE html>
<html>
<head>
<title>Compact Line 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;">
Compact Line 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\compactline.cls
Public Sub createChart(viewer As Object, chartIndex As Integer)
Dim cd As New ChartDirector.API
'
' We use a random number generator to simulate the data from 9:30am to 4:30pm with one data
' point every 4 minutes. The total number of points during that period is 106. (7 hours x 15
' points/hour + 1)
'
Dim noOfPoints As Long
noOfPoints = 106
' Assume we have not reached the end of the day yet, and only 85 points are available. Create a
' random table object of 1 col x 85 rows, using 9 as seed.
Dim rantable As RanTable
Set rantable = cd.RanTable(9, 1, 85)
' Set the 1st column to start with 1800 and with random delta from -5 to 5.
Call rantable.setCol(0, 1800, -5, 5)
' Get the data as the 1st column of the random table
Dim data()
data = rantable.getCol(0)
' The x-axis labels for the chart
Dim labels()
labels = Array("-", "10am", "-", " ", "-", "12am", "-", " ", "-", "2pm", "-", " ", "-", "4pm", _
"-")
'
' Now we obtain the data into arrays, we can start to draw the chart using ChartDirector
'
' Create a XYChart object of size 180 x 180 pixels with a blue background (0x9c9cce)
Dim c As XYChart
Set c = cd.XYChart(180, 180, &H9c9cce)
' Add titles to the top and bottom of the chart using 7.5pt Arial font. The text is white
' 0xffffff on a deep blue 0x31319C background.
Call c.addTitle2(cd.Top, "STAR TECH INDEX 2003-01-28", "arial.ttf", 7.5, &Hffffff, &H31319c)
Call c.addTitle2(cd.Bottom, "LATEST STI:1809.41 (+14.51)", "arial.ttf", 7.5, &Hffffff, _
&H31319c)
' Set the plotarea at (31, 21) and of size 145 x 124 pixels, with a pale yellow (0xffffc8)
' background.
Call c.setPlotArea(31, 21, 145, 124, &Hffffc8)
' Add custom text at (176, 21) (top right corner of plotarea) using 11pt Times Bold Italic
' font/red (0xc09090) color
Call c.addText(176, 21, "Chart Demo", "timesbi.ttf", 11, &Hc09090).setAlignment(cd.TopRight)
' Use 7.5pt Arial as the y axis label font
Call c.yAxis().setLabelStyle("", 7.5)
' Set the labels on the x axis by spreading the labels evenly between the first point (index =
' 0) and the last point (index = noOfPoints - 1)
Call c.xAxis().setLinearScale(0, noOfPoints - 1, labels)
' Use 7.5pt Arial as the x axis label font
Call c.xAxis().setLabelStyle("", 7.5)
' Add a deep blue (0x000080) line layer to the chart
Call c.addLineLayer(data, &H000080)
' Output the chart
Set viewer.Picture = c.makePicture()
' Include tool tip for the chart. The chart starts at 9:30am and each point spans 240 seconds,
' so we can compute the time as {x}*240+9.5*3600.
viewer.ImageMap = c.getHTMLImageMap("clickable", "", _
"title='{={x}*240+9.5*3600|h:nna}: {value|2}'")
End Sub
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