Path: C:\
<%@ language="vbscript" %>
<%
Set cd = CreateObject("ChartDirector.API")
'
' Draw the chart
'
Sub drawChart(viewer)
'
' Data to draw the chart. In this demo, the data buffer will be filled by a random data
' generator. In real life, the data is probably stored in a buffer (eg. a database table, a text
' file, or some global memory) and updated by other means.
'
' We use a data buffer to emulate the last 240 samples.
sampleSize = 240
ReDim dataSeries1(sampleSize - 1)
ReDim dataSeries2(sampleSize - 1)
ReDim dataSeries3(sampleSize - 1)
ReDim timeStamps(sampleSize - 1)
' Our pseudo random number generator
firstDate = DateAdd("s", -UBound(timeStamps) + 1, Now)
For i = 0 To UBound(timeStamps)
timeStamps(i) = DateAdd("s", i, firstDate)
p = Second(timeStamps(i)) + Minute(timeStamps(i)) * 60 + Hour(timeStamps(i)) * 3600
dataSeries1(i) = Cos(p * 2.1) * 10 + 1 / (Cos(p) * Cos(p) + 0.01) + 20
dataSeries2(i) = 100 * Sin(p / 27.7) * Sin(p / 10.1) + 150
dataSeries3(i) = 100 * Cos(p / 6.7) * Cos(p / 11.9) + 150
Next
' Create an XYChart object 600 x 270 pixels in size, with light grey (f4f4f4) background, black
' (000000) border, 1 pixel raised effect, and with a rounded frame.
Set c = cd.XYChart(600, 270, &Hf4f4f4, &H000000, 0)
Call c.setRoundedFrame()
' Set the plotarea at (55, 57) and of size 520 x 185 pixels. Use white (ffffff) background.
' Enable both horizontal and vertical grids by setting their colors to grey (cccccc). Set
' clipping mode to clip the data lines to the plot area.
Call c.setPlotArea(55, 57, 520, 185, &Hffffff, -1, -1, &Hcccccc, &Hcccccc)
Call c.setClipping()
' Add a title to the chart using 15 pts Times New Roman Bold Italic font, with a light grey
' (dddddd) background, black (000000) border, and a glass like raised effect.
Call c.addTitle("Field Intensity at Observation Satellite", "timesbi.ttf", 15).setBackground( _
&Hdddddd, &H000000, cd.glassEffect())
' Configure the y-axis with a 10pts Arial Bold axis title
Call c.yAxis().setTitle("Intensity (V/m)", "arialbd.ttf", 10)
' Configure the x-axis to auto-scale with at least 75 pixels between major tick and 15 pixels
' between minor ticks. This shows more minor grid lines on the chart.
Call c.xAxis().setTickDensity(75, 15)
' Set the axes width to 2 pixels
Call c.xAxis().setWidth(2)
Call c.yAxis().setWidth(2)
' Set the x-axis label format
Call c.xAxis().setLabelFormat("{value|hh:nn:ss}")
' Create a line layer to plot the lines
Set layer = c.addLineLayer2()
' The x-coordinates are the timeStamps.
Call layer.setXData(timeStamps)
' The 3 data series are used to draw 3 lines. Here we put the latest data values as part of the
' data set name, so you can see them updated in the legend box.
Call layer.addDataSet(dataSeries1, &Hff0000, "Alpha")
Call layer.addDataSet(dataSeries2, &H00cc00, "Beta")
Call layer.addDataSet(dataSeries3, &H0000ff, "Gamma")
' Output the chart
chartQuery = c.makeSession(Session, viewer.Id)
' Set the chart URL to the viewer
viewer.ImageUrl = "getchart.asp?" & chartQuery
' Output Javascript chart model to the browser to support tracking cursor
viewer.ChartModel = c.getJsChartModel()
End Sub
'
' This script handles both the full page request, as well as the subsequent partial updates (AJAX
' chart updates). We need to determine the type of request first before we processing it.
'
' Create the WebChartViewer object
Set viewer = cd.WebChartViewer(Request, "chart1")
If viewer.IsPartialUpdateRequest Then
' Is a partial update request. Draw the chart and perform a partial response.
Call drawChart(viewer)
Response.Write viewer.partialUpdateChart()
Response.End
End If
'
' If the code reaches here, it is a full page request.
'
Call drawChart(viewer)
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>Realtime Chart with Track Line</title>
<script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:0px">
<script type="text/javascript">
//
// Execute the following initialization code after the web page is loaded
//
JsChartViewer.addEventListener(window, 'load', function() {
var viewer = JsChartViewer.get('<%=viewer.Id%>');
// Draw track cursor when mouse is moving over plotarea or if the chart is updated. In the latter case,
// if the mouse is not on the plot area, we will update the legend to show the latest data values.
viewer.attachHandler(["MouseMovePlotArea", "PostUpdate"], function(e) {
if (viewer.isMouseOnPlotArea())
trackLineLegend(viewer, viewer.getPlotAreaMouseX())
else
trackLineLegend(viewer, viewer.getChart().getPlotArea().getRightX());
});
// Initialize the track line legend to show the latest data values
trackLineLegend(viewer, viewer.getChart().getPlotArea().getRightX());
// When the chart is being updated, by default, an "Updating" box will pop up. In this example, we
// will disable this box.
viewer.updatingMsg = "";
});
//
// Draw track line with legend
//
function trackLineLegend(viewer, mouseX)
{
// Remove all previously drawn tracking object
viewer.hideObj("all");
// The chart and its plot area
var c = viewer.getChart();
var plotArea = c.getPlotArea();
// Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
var xValue = c.getNearestXValue(mouseX);
var xCoor = c.getXCoor(xValue);
if (xCoor == null)
return;
// Draw a vertical track line at the x-position
viewer.drawVLine("trackLine", xCoor, plotArea.getTopY(), plotArea.getBottomY(), "black 1px dotted");
// Array to hold the legend entries
var legendEntries = [];
// Iterate through all layers to build the legend array
for (var i = 0; i < c.getLayerCount(); ++i)
{
var layer = c.getLayerByZ(i);
// The data array index of the x-value
var xIndex = layer.getXIndexOf(xValue);
// Iterate through all the data sets in the layer
for (var j = 0; j < layer.getDataSetCount(); ++j)
{
var dataSet = layer.getDataSetByZ(j);
// We are only interested in visible data sets with names, as they are required for legend entries.
var dataName = dataSet.getDataName();
var color = dataSet.getDataColor();
if ((!dataName) || (color == null))
continue;
// Build the legend entry, consist of a colored square box, the name and the data value.
var dataValue = dataSet.getValue(xIndex);
legendEntries.push("<nobr>" + viewer.htmlRect(7, 7, color) + " " + dataName + ": " +
((dataValue == null) ? "N/A" : dataValue.toPrecision(4)) + viewer.htmlRect(20, 0) + "</nobr> ");
// Draw a track dot for data points within the plot area
var yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());
if ((yCoor != null) && (yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()))
{
viewer.showTextBox("dataPoint" + i + "_" + j, xCoor, yCoor, JsChartViewer.Center,
viewer.htmlRect(7, 7, color));
}
}
}
// Create the legend by joining the legend entries.
var legend = "<nobr>[" + c.xAxis().getFormattedLabel(xValue, "hh:nn:ss") + "]" + viewer.htmlRect(20, 0) +
"</nobr> " + legendEntries.reverse().join("");
// Display the legend on the top of the plot area
viewer.showTextBox("legend", plotArea.getLeftX(), plotArea.getTopY(), JsChartViewer.BottomLeft, legend,
"width:" + (plotArea.getWidth() - 1) + "px;font:bold 11px Arial;padding:3px;");
}
//
// Executes once every second to update the countdown display. Updates the chart when the countdown reaches 0.
//
function timerTick()
{
// Get the update period and the time left
var updatePeriod = parseInt(document.getElementById("UpdatePeriod").value);
var timeLeft = Math.min(parseInt(document.getElementById("TimeRemaining").innerHTML), updatePeriod) - 1;
if (timeLeft == 0)
// Can update the chart now
JsChartViewer.get('<%=viewer.Id%>').partialUpdate();
else if (timeLeft < 0)
// Reset the update period
timeLeft += updatePeriod;
// Update the countdown display
document.getElementById("TimeRemaining").innerHTML = timeLeft;
}
window.setInterval("timerTick()", 1000);
</script>
<table cellspacing="0" cellpadding="0" border="0">
<tr>
<td align="right" colspan="2" style="background:#000088">
<div style="font:italic bold 10pt Arial; padding:1px 3px 2px 0px;">
<a style="color:#FFFF00; text-decoration:none" href="http://www.advsofteng.com/">
Advanced Software Engineering
</a>
</div>
</td>
</tr>
<tr valign="top">
<td style="width:150px; background:#c0c0ff; border-right:black 1px solid; border-bottom:black 1px solid;">
<br />
<br />
<div style="font: 9pt Verdana; padding:10px;">
<b>Update Period</b><br />
<select id="UpdatePeriod" style="width:130px">
<option value="5">5</option>
<option value="10" selected="selected">10</option>
<option value="20">20</option>
<option value="30">30</option>
<option value="60">60</option>
</select>
</div>
<div style="font:9pt Verdana; padding:10px;">
<b>Time Remaining</b><br />
<div style="width:128px; border:#888888 1px inset;">
<div style="margin:3px" id="TimeRemaining">0</div>
</div>
</div>
</td>
<td>
<div style="font: bold 20pt Arial; margin:5px 0px 0px 5px;">
Realtime Chart with Track Line
</div>
<hr style="border:solid 1px #000080" />
<div style="padding:0px 5px 5px 10px">
<!-- ****** Here is the chart image ****** -->
<%=viewer.renderHTML()%>
</div>
</td>
</tr>
</table>
</body>
</html>