<cfscript>
// ChartDirector for ColdFusion API Access Point
cd = CreateObject("java", "ChartDirector.CFChart");
// A utility to allow us to create arrays with data in one line of code
function Array() {
var result = ArrayNew(1);
var i = 0;
for (i = 1; i LTE ArrayLen(arguments); i = i + 1)
result[i] = arguments[i];
return result;
}
// Data for the chart as 2 random data series
r = cd.RanSeries(127);
data0 = r.getSeries(180, 10, -1.5, 1.5);
data1 = r.getSeries(180, 150, -15, 15);
timeStamps = r.getDateSeries(180, CreateDate(2011, 1, 1), 86400);
// Create a XYChart object of size 670 x 400 pixels
c = cd.XYChart(670, 400);
// Add a title to the chart using 18pt Times New Roman Bold Italic font
c.addTitle("Plasma Stabilizer Energy Usage", "Times New Roman Bold Italic", 18);
// Set the plotarea at (50, 55) with width 100 pixels less than chart width, and height 90 pixels
// less than chart height. Use a vertical gradient from light blue (f0f6ff) to sky blue (a0c0ff) as
// background. Set border to transparent and grid lines to white (ffffff).
c.setPlotArea(50, 55, c.getWidth() - 100, c.getHeight() - 90, c.linearGradientColor(0, 55, 0,
c.getHeight() - 35, "0xf0f6ff", "0xa0c0ff"), -1, cd.Transparent, "0xffffff", "0xffffff");
// Add a legend box at (50, 25) using horizontal layout. Use 10pt Arial Bold as font. Set the
// background and border color to Transparent.
c.addLegend(50, 25, False, "Arial Bold", 10).setBackground(cd.Transparent);
// Set axis label style to 8pt Arial Bold
c.xAxis().setLabelStyle("Arial Bold", 8);
c.yAxis().setLabelStyle("Arial Bold", 8);
c.yAxis2().setLabelStyle("Arial Bold", 8);
// Set the axis stem to transparent
c.xAxis().setColors(cd.Transparent);
c.yAxis().setColors(cd.Transparent);
c.yAxis2().setColors(cd.Transparent);
// Configure x-axis label format
c.xAxis().setMultiFormat(cd.StartOfYearFilter(), "{value|mm/yyyy} ", cd.StartOfMonthFilter(),
"{value|mm}");
// Add axis title using 10pt Arial Bold Italic font
c.yAxis().setTitle("Power Usage (Watt)", "Arial Bold Italic", 10);
c.yAxis2().setTitle("Effective Load (kg)", "Arial Bold Italic", 10);
// Add a line layer to the chart using a line width of 2 pixels.
layer = c.addLineLayer2();
layer.setLineWidth(2);
// Add 2 data series to the line layer
layer.setXData(timeStamps);
layer.addDataSet(data0, "0xcc0000", "Power Usage");
layer.addDataSet(data1, "0x008800", "Effective Load").setUseYAxis2();
// Create the WebChartViewer object
viewer = cd.WebChartViewer(GetPageContext(), "chart1");
// Output the chart
chartQuery = c.makeSession(GetPageContext(), viewer.getId());
// Set the chart URL to the viewer
viewer.setImageUrl("getchart.cfm?" & chartQuery);
// Output Javascript chart model to the browser to support tracking cursor
viewer.setChartModel(c.getJsChartModel());
</cfscript>
<!DOCTYPE html>
<html>
<cfoutput>
<head>
<title>Track Line with Axis Labels</title>
<script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:5px 0px 0px 5px">
<script type="text/javascript">
//
// Use the window load event to set up the MouseMovePlotArea event handler
//
JsChartViewer.addEventListener(window, 'load', function() {
var viewer = JsChartViewer.get('#viewer.getId()#');
// Draw track cursor when mouse is moving over plotarea. Hide it when mouse leaves plot area.
viewer.attachHandler(["MouseMovePlotArea", "TouchStartPlotArea", "TouchMovePlotArea", "ChartMove"],
function(e) {
this.preventDefault(e); // Prevent the browser from using touch events for other actions
trackLineAxis(viewer, viewer.getPlotAreaMouseX());
viewer.setAutoHide("all", ["MouseOutPlotArea", "TouchEndPlotArea"]);
});
});
//
// Draw track line with axis labels
//
function trackLineAxis(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);
// The vertical track line is drawn up to the highest data point (the point with smallest
// y-coordinate). We need to iterate all datasets in all layers to determine where it is.
var minY = plotArea.getBottomY();
// Iterate through all layers to find the highest data point
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);
var yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());
if ((yCoor != null) && (dataSet.getDataColor() != null))
minY = Math.min(minY, yCoor);
}
}
// Draw a vertical track line at the x-position up to the highest data point.
viewer.drawVLine("trackLine", xCoor, Math.max(minY, plotArea.getTopY()),
plotArea.getBottomY() + 3, "black 1px dotted");
// Draw a label on the x-axis to show the track line position
viewer.showTextBox("xAxisLabel", xCoor, plotArea.getBottomY() + 3, JsChartViewer.Top,
c.xAxis().getFormattedLabel(xValue, "mmm dd, yyyy"),
"font:bold 11px Arial;color:##FFFFFF;background-color:##000000;padding:2px 3px");
// Iterate through all layers to draw the axis labels for the data points
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);
// The positional value, axis binding, pixel coordinate and color of the data point.
var dataPoint = dataSet.getPosition(xIndex);
var yAxis = dataSet.getUseYAxis();
var yCoor = c.getYCoor(dataPoint, yAxis);
var color = dataSet.getDataColor();
// Draw the axis label only for visible data points of named data sets
if ((yCoor != null) && (yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()) &&
(color != null))
{
// The axis label consists of 3 parts - a track dot for the data point, an axis label,
// and a line joining the track dot to the axis label.
// Draw the line first. The end point of the line at the axis label side depends on
// whether the label is at the left or right side of the axis (that is, on whether
// the axis is on the left or right side of the plot area).
var xPos = yAxis.getX() + ((yAxis.getAlignment() == JsChartViewer.Left) ? -4 : 4);
viewer.drawHLine("joinLine" + i + "_" + j, yCoor, xPos, xCoor, color + " 1px dotted");
// Draw the axis label. If the axis is on the left side of the plot area, the labels
// should right aligned to the axis, and vice versa.
viewer.showTextBox("yAxisLabel" + i + "_" + j, xPos, yCoor,
(yAxis.getAlignment() == JsChartViewer.Left) ? JsChartViewer.Right : JsChartViewer.Left,
dataPoint.toPrecision(4), "padding:2px 3px;font:bold 11px Arial;background-color:" +
color + ";color:##FFFFFF;-webkit-text-size-adjust:100%;");
// Draw the track dot
viewer.showTextBox("dataPoint" + i + "_" + j, xCoor, yCoor, JsChartViewer.Center,
viewer.htmlRect(7, 7, color));
}
}
}
}
</script>
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
Track Line with Axis Labels
</div>
<hr style="border:solid 1px ##000080" />
<div style="font-size:10pt; font-family:verdana; margin-bottom:1.5em">
<a href="viewsource.cfm?file=#CGI.SCRIPT_NAME#">View Source Code</a>
</div>
<!-- ****** Here is the chart image ****** -->
#viewer.renderHTML(GetPageContext())#
</body>
</cfoutput>
</html> |
