<?php
require_once("../lib/phpchartdir.php");
#
# Initialize the WebChartViewer when the page is first loaded
#
function initViewer($viewer) {
# The full x-axis range is from Jan 1, 2007 to Jan 1, 2012
$startDate = chartTime(2010, 1, 1);
$endDate = chartTime(2015, 1, 1);
$viewer->setFullRange("x", $startDate, $endDate);
# Initialize the view port to show the last 366 days (out of 1826 days)
$viewer->setViewPortWidth(366.0 / 1826);
$viewer->setViewPortLeft(1 - $viewer->getViewPortWidth());
# Set the maximum zoom to 10 days (out of 1826 days)
$viewer->setZoomInWidthLimit(10.0 / 1826);
}
#
# Create a random table for demo purpose.
#
function getRandomTable() {
$r = new RanTable(127, 4, 1828);
$r->setDateCol(0, chartTime(2010, 1, 1), 86400);
$r->setCol(1, 150, -10, 10);
$r->setCol(2, 200, -10, 10);
$r->setCol(3, 250, -8, 8);
return $r;
}
#
# Draw the chart
#
function drawChart($viewer) {
# Determine the visible x-axis range
$viewPortStartDate = $viewer->getValueAtViewPort("x", $viewer->getViewPortLeft());
$viewPortEndDate = $viewer->getValueAtViewPort("x", $viewer->getViewPortLeft() +
$viewer->getViewPortWidth());
# We need to get the data within the visible x-axis range. In real code, this can be by using a
# database query or some other means as specific to the application. In this demo, we just
# generate a random data table, and then select the data within the table.
$r = getRandomTable();
# Select the data for the visible date range viewPortStartDate to viewPortEndDate. It is
# possible there is no data point at exactly viewPortStartDate or viewPortEndDate. In this case,
# we also need the data points that are just outside the visible date range to "overdraw" the
# line a little bit (the "overdrawn" part will be clipped to the plot area) In this demo, we do
# this by adding a one day margin to the date range when selecting the data.
$r->selectDate(0, $viewPortStartDate - 86400, $viewPortEndDate + 86400);
# The selected data from the random data table
$timeStamps = $r->getCol(0);
$dataSeriesA = $r->getCol(1);
$dataSeriesB = $r->getCol(2);
$dataSeriesC = $r->getCol(3);
#
# Now we have obtained the data, we can plot the chart.
#
#================================================================================
# Configure overall chart appearance.
#================================================================================
# Create an XYChart object 600 x 300 pixels in size, with pale blue (f0f0ff) background, black
# (000000) rounded border, 1 pixel raised effect.
$c = new XYChart(600, 300, 0xf0f0ff, 0x000000);
$c->setRoundedFrame();
# Set the plotarea at (52, 60) and of size 520 x 205 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.
$c->setPlotArea(55, 60, 520, 205, 0xffffff, -1, -1, 0xcccccc, 0xcccccc);
# As the data can lie outside the plotarea in a zoomed chart, we need to enable clipping.
$c->setClipping();
# Add a top title to the chart using 15pt Times New Roman Bold Italic font, with a light blue
# (ccccff) background, black (000000) border, and a glass like raised effect.
$c->addTitle("Product Line International Market Price", "Times New Roman Bold Italic", 15
)->setBackground(0xccccff, 0x000000, glassEffect());
# Add a legend box at the top of the plot area with 9pt Arial Bold font with flow layout.
$c->addLegend(50, 33, false, "Arial Bold", 9)->setBackground(Transparent, Transparent);
# Set axes width to 2 pixels
$c->xAxis->setWidth(2);
$c->yAxis->setWidth(2);
# Add a title to the y-axis
$c->yAxis->setTitle("Price (USD)", "Arial Bold", 10);
#================================================================================
# Add data to chart
#================================================================================
#
# In this example, we represent the data by lines. You may modify the code below to use other
# representations (areas, scatter plot, etc).
#
# Add a line layer for the lines, using a line width of 2 pixels
$layer = $c->addLineLayer2();
$layer->setLineWidth(2);
# In this demo, we do not have too many data points. In real code, the chart may contain a lot
# of data points when fully zoomed out - much more than the number of horizontal pixels in this
# plot area. So it is a good idea to use fast line mode.
$layer->setFastLineMode();
# Now we add the 3 data series to a line layer, using the color red (ff0000), green (00cc00) and
# blue (0000ff)
$layer->setXData($timeStamps);
$layer->addDataSet($dataSeriesA, 0xff0000, "Product Alpha");
$layer->addDataSet($dataSeriesB, 0x00cc00, "Product Beta");
$layer->addDataSet($dataSeriesC, 0x0000ff, "Product Gamma");
#================================================================================
# Configure axis scale and labelling
#================================================================================
# Set the x-axis as a date/time axis with the scale according to the view port x range.
$viewer->syncDateAxisWithViewPort("x", $c->xAxis);
# In this demo, we rely on ChartDirector to auto-label the axis. We ask ChartDirector to ensure
# the x-axis labels are at least 75 pixels apart to avoid too many labels.
$c->xAxis->setTickDensity(75);
#================================================================================
# Output the chart
#================================================================================
# Output the chart
$viewer->setChart($c, SVG);
# Include tool tip for the chart
$viewer->setImageMap($c->getHTMLImageMap("", "",
"title='[{dataSetName}] {x|mmm dd, yyyy}: USD {value|2}'"));
}
#
# 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
$viewer = new WebChartViewer("chart1");
if ($viewer->isPartialUpdateRequest()) {
# Is a partial update request. Draw the chart and perform a partial response.
drawChart($viewer);
print($viewer->partialUpdateChart());
exit();
}
#
# If the code reaches here, it is a full page request.
#
# In this exapmle, we just need to initialize the WebChartViewer and draw the chart.
initViewer($viewer);
drawChart($viewer);
?>
<!DOCTYPE html>
<html>
<head>
<title>Simple Zooming and Scrolling</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() {
// Update the chart when the view port has changed (eg. when the user zooms in using the mouse)
var viewer = JsChartViewer.get('<?php echo $viewer->getId() ?>');
viewer.attachHandler("ViewPortChanged", viewer.partialUpdate);
// Set the initial mouse usage to "scroll"
viewer.setMouseUsage(JsChartViewer.Scroll);
document.getElementById("scrollChart").checked = true;
});
</script>
<form method="post">
<table cellspacing="0" cellpadding="0" border="0">
<tr>
<td align="right" colspan="2" style="background:#000088">
<div style="padding:0px 3px 2px 0px; font:italic bold 10pt Arial;">
<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:127px; background:#c0c0ff; border-right:black 1px solid; border-bottom:black 1px solid;">
<div style="font:9pt Verdana; padding:10px 0px 0px 3px; line-height:1.5; width:127px">
<!-- The onclick handler of the following radio buttons sets the mouse usage mode. -->
<input name="mouseUsage" id="scrollChart" type="radio"
onclick="JsChartViewer.get('<?php echo $viewer->getId() ?>').setMouseUsage(JsChartViewer.Scroll)" />
Drag To Scroll<br />
<input name="mouseUsage" id="zoomInChart" type="radio"
onclick="JsChartViewer.get('<?php echo $viewer->getId() ?>').setMouseUsage(JsChartViewer.ZoomIn)" />
Zoom In<br />
<input name="mouseUsage" id="zoomOutChart" type="radio"
onclick="JsChartViewer.get('<?php echo $viewer->getId() ?>').setMouseUsage(JsChartViewer.ZoomOut)" />
Zoom Out<br />
</div>
</td>
<td>
<div style="font-weight:bold; font-size:20pt; margin:5px 0px 0px 5px; font-family:Arial">
Simple Zooming and Scrolling
</div>
<hr style="border:solid 1px #000080" />
<div style="padding:0px 5px 5px 10px">
<!-- ****** Here is the chart image ****** -->
<?php echo $viewer->renderHTML() ?>
</div>
</td>
</tr>
</table>
</form>
</body>
</html> |