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<head>
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/**
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<title>Integrating RGraph with external libraries</title>
<meta name="keywords" content="rgraph html5 canvas charts docs external libraries" />
<meta name="description" content="Documentation about integrating RGraph with external libraries" />
<meta property="og:title" content="RGraph: HTML5 Javascript charts library" />
<meta property="og:description" content="A charts library based on the HTML5 canvas tag" />
<meta property="og:image" content="http://www.rgraph.net/images/logo.png"/>
<link rel="stylesheet" href="../css/website.css" type="text/css" media="screen" />
<link rel="icon" type="image/png" href="../images/favicon.png">
<!-- Place this tag in your head or just before your close body tag -->
<script type="text/javascript" src="https://apis.google.com/js/plusone.js"></script>
<script src="../libraries/RGraph.modaldialog.js" ></script>
<script src="../libraries/RGraph.common.core.js" ></script>
<script src="../libraries/RGraph.common.context.js" ></script>
<script src="../libraries/RGraph.line.js" ></script>
<!--[if lt IE 9]><script src="../excanvas/excanvas.original.js"></script><![endif]-->
<script>
window.onload = function ()
{
/**
* Draw the line chart
*/
var line = new RGraph.Line('myLine', [45,12,16,18,44,54,23,21,56,58,33,47]);
line.Set('chart.background.barcolor1', 'white');
line.Set('chart.background.barcolor2', 'white');
line.Set('chart.tickmarks', null);
line.Set('chart.hmargin', 10);
line.Set('chart.linewidth', 3);
line.Set('chart.shadow', true);
line.Set('chart.shadow.offset', 2);
line.Set('chart.labels', ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']);
line.Set('chart.title', 'A line chart with context menu');
// This defines a context menu which shows the dialog. The commented out
// bit defines an onclick handler on the background, so that when you
// click it (the background), the dialog is hidden.
if (!RGraph.isOld()) {
line.Set('chart.contextmenu', [
['Login to admin area...', function () {ModalDialog.Show('myDialog', 300);/*ModalDialog.background.onclick = function () {ModalDialog.Close();};*/}],
null,
['Cancel', function () {}]
]);
}
line.Draw();
}
</script>
<style>
/*
* These are the CSS classes that you can use to customise the appearance of the ModalDialog. If you're trying to
* override something which the scripts set, then because of the ordering you may need to use the "! important"
* modifier.
*/
.ModalDialog_background {
}
.ModalDialog_dialog {
-webkit-box-shadow: gray 0 0 15px ! important;
-moz-box-shadow: 0 0 15px gray ! important;
box-shadow: 0 0 15px gray ! important;
}
.ModalDialog_topbar {
}
</style>
<script>
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-54706-2']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
</head>
<body>
<!-- Social networking buttons -->
<?php
$prefix = substr($_SERVER['SERVER_NAME'], 0, 3);
require("/rgraph.{$prefix}/social.html");
?>
<!-- Social networking buttons -->
<div id="breadcrumb">
<a href="../index.html">RGraph: HTML5 Javascript charts library</a>
>
<a href="./index.html">Documentation</a>
>
RGraph & external libraries
</div>
<h1>Integrating <span>RGraph with external libraries</span></h1>
<script>
if (RGraph.isOld()) {
document.write('<div style="background-color: #fee; border: 2px dashed red; padding: 5px"><b>Important</b><br /><br /> Internet Explorer does not natively support the HTML5 canvas tag, so if you want to see the charts, you can either:<ul><li>Install <a href="http://code.google.com/chrome/chromeframe/">Google Chrome Frame</a></li><li>Use ExCanvas. This is provided in the RGraph Archive.</li><li>Use another browser entirely. Your choices are Firefox 3.5+, Chrome 2+, Safari 4+ or Opera 10.5+. </li></ul> <b>Note:</b> Internet Explorer 9 fully supports the canvas tag.</div>');
}
</script>
<ul>
<li><a href="#msie">Note about Microsoft Internet Explorer and the ModalDialog</a></li>
<li><a href="#hiding">Hiding the ModalDialog</a></li>
<li><a href="#customising">Customising the ModalDialog</a></li>
<li><a href="#integration">ModalDialog integration</a></li>
<li><a href="#covering">Covering the scroll bars</a></li>
</ul>
<canvas id="myLine" width="400" height="200" style="float: right">[No canvas support]</canvas>
<p>
This page shows you how you can easily integrate the charts with other external Javascript libraries. This particular example
adds a context menu to the chart, of which the only option is to show a login dialog. This could, for example, be used to
allow logging in to an admin area.
</p>
<p>
The dialog doesn't need to require user input - it could just be a static "Please wait..." type dialog, which is shown while a
subsequent page loads that takes a few seconds.
</p>
<p>
The ModalDialog was originally an external library, however it's now part of the RGraph package. It's also covered by the
RGraph license - so if you have an <a href="licensing.html">RGraph license</a>, then the ModalDialog is part of that.
</p>
<br /><br />
<pre class="code">
<script src="RGraph.common.core.js">
<script src="RGraph.common.context.js">
<script src="RGraph.line.js">
<script src="RGraph.modaldialog.js">
<script>
window.onload = function ()
{
/**
* Draw the line chart
*/
var line = new RGraph.Line('myLine', [45,12,16,18,44,54,23,21,56,58,33,47]);
line.Set('chart.background.barcolor1', 'white');
line.Set('chart.background.barcolor2', 'white');
line.Set('chart.tickmarks', null);
line.Set('chart.hmargin', 10);
line.Set('chart.linewidth', 3);
line.Set('chart.shadow', true);
line.Set('chart.shadow.offset', 2);
line.Set('chart.labels', ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']);
line.Set('chart.title', 'A line chart with context menu');
<span style="color: green">
// This defines a context menu which calls the given function. This function in turn shows the dialog
line.Set('chart.contextmenu', [['Login to admin area...', function () {ModalDialog.Show('myDialog', 300);}}]]);
</span>
line.Draw();
}
</script>
<!-- This is the popup dialog-->
<div id="myDialog" class="modalDialog" style="display: none">
<b>Please login</b>
<p>
<table border="0">
<tr>
<td align="right" style="padding-top: 4px">Email</td>
<td><input type="text" size="20" name="email" style="width: 150px" /></td>
</tr>
<tr>
<td align="right" style="padding-top: 4px">Password</td>
<td><input type="password" size="20" name="password" style="width: 150px" /></td>
</tr>
<tr>
<td colspan="2" align="right">
<input type="reset" value="Cancel" onclick="ModalDialog.Close()">
<input type="submit"
name="submit"
value="Login »"
onclick="alert('This is just an example'); event.stopPropagation()">
</td>
</tr>
</table>
</p>
</div>
<!-- End of dialog --></pre>
<p>
If you're interested in using this modal dialog, then you'll probably also want the CSS that styles it. This can be found in the
"css" directory.
</p>
<a name="msie"></a>
<h3>Note about Microsoft Internet Explorer 8 and the ModalDialog</h3>
<p>
Microsoft Internet Explorer 8 only supports fixed positioning in strict rendering mode, therefore you must specify a DTD
when using this browser. Eg:
</p>
<pre class="code">
<!DOCTYPE html >
</pre>
<a name="hiding"></a>
<h3>Hiding the ModalDialog</h3>
<p>
To hide the ModalDialog (from a "Cancel" button for example), you can use the Close() method:
</p>
<pre class="code">
<input type="reset" value="Cancel" onclick="ModalDialog.Close()">
</pre>
<a name="customising"></a>
<h3>Customising the ModalDialog</h3>
<p>
You can customise the appearance of the ModalDialog by using three CSS classes, which are documented <a href="css.html">here</a>.
This page customises the dialog slightly by changing the shadow X/Y offsets:
</p>
<pre class="code">
<style>
/*
* These are the CSS classes that you can use to customise the appearance of the ModalDialog. If you're trying to
* override something which the scripts set, then because of the ordering you may need to use the "! important"
* modifier.
*/
/**
* This is the semi-opaque background
*/
.ModalDialog_background {
}
/**
* This is the dialog itself
*/
.ModalDialog_dialog {
-webkit-box-shadow: gray 0 0 15px ! important;
-moz-box-shadow: 0 0 15px gray ! important;
box-shadow: 0 0 15px gray ! important;
}
/**
* This is gray bar at the top of the dialog
*/
.ModalDialog_topbar {
}
</style>
</pre>
<a name="integration"></a>
<h3>ModalDialog integration</h3>
<p>
To integrate the ModalDialog look at the sample code above (the key line is where the context menu is defined). The method you should call is <b>ModalDialog.Show(id, width)</b>.
The <i>id</i> is the <i>id</i> of the layer to use. Only the <i>.innerHTML</i> is used, not the layer itself, so it can be hidden by
setting the display CSS <i>display</i> property to <i>none</i>. The <i>width</i> is a number which is used as the width of the dialog.
</p>
<p>
The only library needed for the ModalDialog to work is <i>RGraph.modaldialog.js</i> - you do not need to use
<i>RGraph.common.js</i>. This makes for far smaller download requirements.
</p>
<a name="covering"></a>
<h3>Covering the scroll bars</h3>
<p>
Normally, a regular DIV lives inside the browser and cannot cover the scroll bars. There is however a way to achieve
this but it does mean that restructuring your website may be necessary, and it's done by using an IFRAME. The following
steps are involved:
</p>
<ol>
<li style="margin-top: 0">The index page of your website creates an IFRAME and sets it to cover the entire window.</li>
<li style="margin-top: 0">This IFRAME then loads the website.</li>
<li style="margin-top: 0">The DIV then covers the top-most window.</li></li>
</ol>
<p style="margin-bottom: 50px">
There is an example of this technique <a href="iframe-setup.html"><b>here</b></a>
</p>
<!-- This is the popup dialog-->
<div id="myDialog" class="modalDialog" style="display: none">
<b>Please login</b>
<p>
<table border="0">
<tr>
<td align="right" style="padding-top: 4px">Email</td>
<td><input type="text" size="20" name="email" style="width: 150px" /></td>
</tr>
<tr>
<td align="right" style="padding-top: 4px">Password</td>
<td><input type="password" size="20" name="password" style="width: 150px" /></td>
</tr>
<tr>
<td colspan="2" align="right">
<input type="reset" value="Cancel" onclick="ModalDialog.Close()">
<input type="submit" name="submit" value="Login »" onclick="alert('This is just an example'); event.stopPropagation()">
</td>
</tr>
</table>
</p>
</div>
<!-- End of dialog -->
</body>
</html>