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"PEAR Progress2 logo" />
<h1>
HTML_Progress2 : The Definitive Guide
</h1>
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Chapter 5. Quick Start with HTML_Progress2
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<div class="sect1" lang="en" xml:lang="en">
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<h2 class="title c1">
<a name="quickstart.processing" id=
"quickstart.processing"></a>Processing
</h2>
</div>
<div class="toc">
<dl>
<dt>
<span class="sect2"><a href="ch05s02.html#id4784653">With a user
callback</a></span>
</dt>
<dt>
<span class="sect2"><a href="ch05s02.html#id4788206">Without user
callback</a></span>
</dt>
</dl>
</div>
<p>
Now we know the basic of progress meter design, its now time to learn
how to handle display refresh with the user process.
</p>
<p>
There are two main ways :
</p>
<div class="orderedlist">
<ol type="1">
<li>
<p>
<span class="bold"><strong>with a user callback.</strong></span>
The core of HTML_Progress2 checking progression (until end), and
handling display refresh for us.
</p>
</li>
<li>
<p>
<span class="bold"><strong>without user callback.</strong></span>
We have to do all tasks that core of HTML_Progress2 can do it for
us.
</p>
</li>
</ol>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<h3 class="title">
<a name="id4784653" id="id4784653"></a>With a user callback
</h3>
</div>
<p>
Its the most easy way. We have just to declare the user callback with
<a href="re53.html" title=
"HTML_Progress2::setProgressHandler">setProgressHandler()</a> method,
and launch execution with <a href="re55.html" title=
"HTML_Progress2::run">run()</a> method. HTML_Progress2 will check
progression of meter (both modes supported: indeterminate,
determinate) and stop when 100% is reach.
</p>
<div class="tip c2">
<table border="0" summary="Tip">
<tr>
<td rowspan="2" align="center" valign="top" width="48">
<img alt="[Tip]" src="img/admons/tip.png" />
</td>
<th align="left">
Tip
</th>
</tr>
<tr>
<td align="left" valign="top">
If you don't specify a callback, default behavior will call
HTML_Progress2 <a href="re52.html" title=
"HTML_Progress2::sleep">sleep()</a> method in background: delay
animation n milliseconds (default = zero). This delay is set by
<a href="re46.html" title=
"HTML_Progress2::setAnimSpeed">setAnimSpeed()</a> method.
</td>
</tr>
</table>
</div>
<p>
Here is an example that demonstrates user callback usage. We suppose
that we get image count from any data source and we have to
build/display these images. It could be generated by jpgraph (for
complex graphics), but here we used five times same script that call
a <code class="function">pearImage()</code> function. Part of code
came from <a class="external" href=
"http://pear.php.net/package/PEAR_Info" title=
"http://pear.php.net/package/PEAR_Info">PEAR_Info</a> package.
</p>
<p>
Here is a copy of such <code class=
"function">PEAR_Info::pearImage()</code> function, in the
<code class="filename">pearimage.php</code> script:
</p>
<div class="php c3">
<ol>
<li class="li1">
<div class="de1">
<span class="kw2"><?php</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw2">function</span> pearImage<span class=
"br0">(</span><span class="br0">)</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="br0">{</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pear_image</span> <span class=
"sy0">=</span> <span class=
"st0">'R0lGODlhaAAyAMT/AMDAwP3+/TWaAvD47Pj89vz++zebBDmcBj6fDEekFluvKmu3PvX68ujz4XvBS8LgrNXqxeHw1ZnPaa/dgvv9+cLqj8LmltD2msnuls'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pear_image</span> <span class=
"sy0">.=</span> <span class=
"st0">'3xmszwmf7+/f///wAAAAAAAAAAACH5BAEAAAAALAAAAABoADIAQAX/ICCOZGmeaKqubOtWWjwJphLLgH1XUu//C1Jisfj9YLEKQnSY3GaixWQqQTkYHM4'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pear_image</span> <span class=
"sy0">.=</span> <span class=
"st0">'AMulNLJFC9pEwIW/odKU8cqTfsWoTTtcomU4ZjbR4ZP+AgYKCG0EiZ1AuiossEhwEXRMEg5SVWQ6MmZqKWD0QlqCUEHubpaYlExwRPRZioZZVp7KzKQoS'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pear_image</span> <span class=
"sy0">.=</span> <span class=
"st0">'DxANDLsNXA5simd2FcQYb4YAc2jEU80TmAAIztPCMcjKdg4OEsZJmwIWWQPQI4ikIwtoVQnddgrv8PFlCWgYCwkI+fp5dkvJ/IlUKMCy6tYrDhNIIKLFE'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pear_image</span> <span class=
"sy0">.=</span> <span class=
"st0">'AWCTxse+ABD4SClWA0zovAjcUJFi6EwahxZwoGqHhFA/4IqoICkyxQSKkbo0gDkuBXV4FRAJkRCnTgi2P28IcEfk5xpWppykFJVuScmEvDTEETAVJ6bEp'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pear_image</span> <span class=
"sy0">.=</span> <span class=
"st0">'ypcADPkz3pvKVAICHChkC7siQ08zVqu4Q6hgIFEFZuEn/KMgRUkaBmAQs+cEHgIiHVH5EAFpIgW4+NT6LnaqhDwe/Ov7YOmWZp4MkiAWBIl0kAVsJWuzc'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pear_image</span> <span class=
"sy0">.=</span> <span class=
"st0">'YpdiNgddc0E8cKBAu/FElBwagMb88ZZKDRAkWJtkWhHh3wwUbKHQJN3wQAaXGR2LpArv5oFHRR34C7Mf6oLXZNfqBgNI7oOLhj1f8PaGpygHQ0xtP8MDV'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pear_image</span> <span class=
"sy0">.=</span> <span class=
"st0">'KwYTSKcgxr9/hS6/pCCAAg5M4B9/sWh1YP9/XSgQWRML/idBfKUc4IBET9lFjggKhDYZAELZJYEBI2BDB3ouNBEABwE8gAwiCcSYgAKqPdEVAG7scM8BP'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pear_image</span> <span class=
"sy0">.=</span> <span class=
"st0">'PZ4AIlM+OgjAgpMhRE24OVoBwsIFEGFA7ZkQQBWienWxmRa7XDjKZXhBdAeSmKQwgLuUVLICa6VEKIGcK2mQWoVZHCBXJblJUFkY06yAXlGsPIHBEYdYi'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pear_image</span> <span class=
"sy0">.=</span> <span class=
"st0">'WHb+WQBgaIJqqoHFNpgMGB7dT5ZQuG/WbBAIAUEEFNfwxAWpokTIXJAWdgoJ9kRFG2g5eDRpXSBpEIF0oEQFaZhDbaSFANRgqcJoEDRARLREtxOQpsPO9'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pear_image</span> <span class=
"sy0">.=</span> <span class=
"st0">'06ZUeJgjQB6dZUPBAdwcF8KLXXRVQaKFcsRRLJ6vMiiCNKxRE8ECZKgUA3Va4arOAAqdGRWO7uMZH5AL05gvsjQbg6y4NCjQ1kw8TVGcbdoKGKx8j3bGH'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pear_image</span> <span class=
"sy0">.=</span> <span class=
"st0">'7nARBArqwi0gkFJBrZiXBQRbHoIgnhSjcEBKfD7c3HMhz+JIQSY3t8GGKW+SUhfUajxGzKd0IoHBNkNQK86ZYEqdzYA8AHQpqXRUm80oHs1CAgMoBxzRq'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pear_image</span> <span class=
"sy0">.=</span> <span class=
"st0">'vzs9CIKECC1JBp7enUpfXHApwVYNAfo16c4IrYPLVdSAJVob7IAtCBFQGHcs/RRdiUDPHA33oADEAIAOw=='</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">header</span><span class=
"br0">(</span><span class="st0">'content-type:
image/gif'</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">echo</span> <span class=
"kw3">base64_decode</span><span class=
"br0">(</span><span class="re1">$pear_image</span><span class=
"br0">)</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="br0">}</span>
</div>
</li>
<li class="li1">
<div class="de1">
pearImage<span class="br0">(</span><span class=
"br0">)</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw2">?></span>
</div>
</li>
</ol>
</div>
<p>
And now, the main script.
</p>
<div class="php c3">
<ol>
<li class="li1">
<div class="de1">
<span class="kw2"><?php</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw1">require_once</span> <span class=
"st0">'HTML/Progress2.php'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
</div>
</li>
<li class="li1 ln-xtra">
<div class="de1">
<span class="re1">$dataSrc</span> <span class="sy0">=</span>
<span class="kw3">array</span><span class=
"br0">(</span><span class="st0">'pearimage'</span><span class=
"sy0">,</span> <span class="st0">'pearimage'</span><span class=
"sy0">,</span> <span class="st0">'pearimage'</span><span class=
"sy0">,</span> <span class="st0">'pearimage'</span><span class=
"sy0">,</span> <span class="st0">'pearimage'</span><span class=
"br0">)</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
</div>
</li>
<li class="li1 ln-xtra">
<div class="de1">
<span class="kw2">function</span> myProcess<span class=
"br0">(</span><span class="re1">$pValue</span><span class=
"sy0">,</span> <span class="sy0">&</span><span class=
"re1">$pBar</span><span class="br0">)</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="br0">{</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">static</span> <span class=
"re1">$q</span> <span class="sy0">=</span> <span class=
"nu0">0</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">global</span> <span class=
"re1">$dataSrc</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pBar</span><span class=
"sy0">-></span><span class="me1">sleep</span><span class=
"br0">(</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw1">if</span> <span class=
"br0">(</span><span class="kw3">isset</span><span class=
"br0">(</span><span class="re1">$dataSrc</span><span class=
"br0">[</span><span class="re1">$q</span><span class=
"br0">]</span><span class="br0">)</span><span class=
"br0">)</span> <span class="br0">{</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">echo</span>
<span class="st0">'<tr><td>'</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class=
"sy0">.</span> <span class="st0">'<img
src="'</span><span class="sy0">.</span> <span class=
"re1">$dataSrc</span><span class="br0">[</span><span class=
"re1">$q</span><span class="br0">]</span> <span class=
"sy0">.</span><span class="st0">'.php?timestamp='</span>
<span class="sy0">.</span> <span class=
"kw3">time</span><span class="br0">(</span><span class=
"br0">)</span> <span class="sy0">.</span> <span class="st0">'"
alt=""/>'</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class=
"sy0">.</span> <span class="st0">'<b>'</span><span class=
"sy0">.</span><span class="br0">(</span><span class=
"re1">$q</span><span class="nu0">+1</span><span class=
"br0">)</span><span class="sy0">.</span><span class=
"st0">'</b>'</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class=
"sy0">.</span> <span class=
"st0">'</td></tr>'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="br0">}</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$q</span><span class=
"sy0">++;</span>
</div>
</li>
<li class="li1 ln-xtra">
<div class="de1">
<span class="kw1">return</span> <span class=
"re1">$q</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="br0">}</span>
</div>
</li>
<li class="li1">
<div class="de1">
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pb</span> <span class="sy0">=</span>
<span class="kw2">new</span> HTML_Progress2<span class=
"br0">(</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pb</span><span class=
"sy0">-></span><span class=
"me1">setAnimSpeed</span><span class="br0">(</span><span class=
"nu0">500</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1 ln-xtra">
<div class="de1">
<span class="re1">$pb</span><span class=
"sy0">-></span><span class=
"me1">setIncrement</span><span class="br0">(</span><span class=
"kw3">intval</span><span class="br0">(</span><span class=
"kw3">ceil</span><span class="br0">(</span><span class=
"nu0">100</span> <span class="sy0">/</span> <span class=
"kw3">count</span><span class="br0">(</span><span class=
"re1">$dataSrc</span><span class="br0">)</span><span class=
"br0">)</span><span class="br0">)</span><span class=
"br0">)</span><span class="sy0">;</span>
</div>
</li>
<li class="li1 ln-xtra">
<div class="de1">
<span class="re1">$pb</span><span class=
"sy0">-></span><span class=
"me1">setProgressHandler</span><span class=
"br0">(</span><span class="st0">'myProcess'</span><span class=
"br0">)</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw2">?></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="sy0"><</span>html<span class="sy0">></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="sy0"><</span>head<span class="sy0">></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw2"><?php</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">echo</span> <span class=
"re1">$pb</span><span class="sy0">-></span><span class=
"me1">getStyle</span><span class="br0">(</span><span class=
"kw2">false</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">echo</span> <span class=
"re1">$pb</span><span class="sy0">-></span><span class=
"me1">getScript</span><span class="br0">(</span><span class=
"kw2">false</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw2">?></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="sy0"></</span>head<span class="sy0">></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="sy0"><</span>body<span class="sy0">></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw2"><?php</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pb</span><span class=
"sy0">-></span><span class="me1">display</span><span class=
"br0">(</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">echo</span> <span class="st0">'<table
width="100%">'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pb</span><span class=
"sy0">-></span><span class="me1">run</span><span class=
"br0">(</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">echo</span> <span class=
"st0">'</table>'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1 ln-xtra">
<div class="de1">
<span class="re1">$pb</span><span class=
"sy0">-></span><span class="me1">hide</span><span class=
"br0">(</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw2">?></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="sy0"></</span>body<span class="sy0">></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="sy0"></</span>html<span class="sy0">></span>
</div>
</li>
</ol>
</div>
<p>
Lets review this example step by step :
</p>
<div class="variablelist">
<dl>
<dt>
<span class="term">Line 4 :</span>
</dt>
<dd>
<p>
<code class="varname">$dataSrc</code> identify the data source.
Five call to <code class="filename">pearimage.php</code>
script.
</p>
</dd>
<dt>
<span class="term">Lines 6-20, 25 :</span>
</dt>
<dd>
<p>
Main task is to build, and display, five pear logo pictures.
This task is defined by user callback : <code class=
"function">myProcess</code> and linked to progress meter by
<code class="methodname">setProgressHandler()</code> method.
</p>
</dd>
<dt>
<span class="term">Lines 19, 24 :</span>
</dt>
<dd>
<p>
We used <span class="emphasis"><em>moveStep</em></span>
strategy with the <code class="literal">return $q</code> code,
and increment compute.
</p>
<p>
If you remove this line we use the second strategy called
<span class="emphasis"><em>moveNext</em></span>. We will talk
about it later. Don't be afraid if you don't know yet what is
the difference.
</p>
</dd>
<dt>
<span class="term">Line 40 :</span>
</dt>
<dd>
<p>
Task is completed, five logo built and shown. The progress bar
is hidden.
</p>
</dd>
</dl>
</div>
</div>
<div class="sect2" lang="en" xml:lang="en">
<div class="titlepage">
<h3 class="title">
<a name="id4788206" id="id4788206"></a>Without user callback
</h3>
</div>
<p>
To show difference of two implementations, we will re-used the same
example of pear logo.
</p>
<div class="php c3">
<ol>
<li class="li1">
<div class="de1">
<span class="kw2"><?php</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw1">require_once</span> <span class=
"st0">'HTML/Progress2.php'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
</div>
</li>
<li class="li1 ln-xtra">
<div class="de1">
<span class="re1">$dataSrc</span> <span class="sy0">=</span>
<span class="kw3">array</span><span class=
"br0">(</span><span class="st0">'pearimage'</span><span class=
"sy0">,</span> <span class="st0">'pearimage'</span><span class=
"sy0">,</span> <span class="st0">'pearimage'</span><span class=
"sy0">,</span> <span class="st0">'pearimage'</span><span class=
"sy0">,</span> <span class="st0">'pearimage'</span><span class=
"br0">)</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
</div>
</li>
<li class="li1 ln-xtra">
<div class="de1">
<span class="kw2">function</span> myProcess<span class=
"br0">(</span><span class="br0">)</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="br0">{</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">static</span> <span class=
"re1">$q</span> <span class="sy0">=</span> <span class=
"nu0">0</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">global</span> <span class=
"re1">$dataSrc</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw1">if</span> <span class=
"br0">(</span><span class="kw3">isset</span><span class=
"br0">(</span><span class="re1">$dataSrc</span><span class=
"br0">[</span><span class="re1">$q</span><span class=
"br0">]</span><span class="br0">)</span><span class=
"br0">)</span> <span class="br0">{</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">echo</span>
<span class="st0">'<tr><td>'</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class=
"sy0">.</span> <span class="st0">'<img
src="'</span><span class="sy0">.</span> <span class=
"re1">$dataSrc</span><span class="br0">[</span><span class=
"re1">$q</span><span class="br0">]</span> <span class=
"sy0">.</span><span class="st0">'.php?timestamp='</span>
<span class="sy0">.</span> <span class=
"kw3">time</span><span class="br0">(</span><span class=
"br0">)</span> <span class="sy0">.</span> <span class="st0">'"
alt=""/>'</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class=
"sy0">.</span> <span class="st0">'<b>'</span><span class=
"sy0">.</span><span class="br0">(</span><span class=
"re1">$q</span><span class="nu0">+1</span><span class=
"br0">)</span><span class="sy0">.</span><span class=
"st0">'</b>'</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class=
"sy0">.</span> <span class=
"st0">'</td></tr>'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="br0">}</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$q</span><span class=
"sy0">++;</span>
</div>
</li>
<li class="li1 ln-xtra">
<div class="de1">
<span class="kw1">return</span> <span class=
"re1">$q</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="br0">}</span>
</div>
</li>
<li class="li1">
<div class="de1">
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pb</span> <span class="sy0">=</span>
<span class="kw2">new</span> HTML_Progress2<span class=
"br0">(</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pb</span><span class=
"sy0">-></span><span class=
"me1">setAnimSpeed</span><span class="br0">(</span><span class=
"nu0">500</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pb</span><span class=
"sy0">-></span><span class=
"me1">setIncrement</span><span class="br0">(</span><span class=
"kw3">intval</span><span class="br0">(</span><span class=
"kw3">ceil</span><span class="br0">(</span><span class=
"nu0">100</span> <span class="sy0">/</span> <span class=
"kw3">count</span><span class="br0">(</span><span class=
"re1">$dataSrc</span><span class="br0">)</span><span class=
"br0">)</span><span class="br0">)</span><span class=
"br0">)</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw2">?></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="sy0"><</span>html<span class="sy0">></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="sy0"><</span>head<span class="sy0">></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw2"><?php</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">echo</span> <span class=
"re1">$pb</span><span class="sy0">-></span><span class=
"me1">getStyle</span><span class="br0">(</span><span class=
"kw2">false</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">echo</span> <span class=
"re1">$pb</span><span class="sy0">-></span><span class=
"me1">getScript</span><span class="br0">(</span><span class=
"kw2">false</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw2">?></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="sy0"></</span>head<span class="sy0">></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="sy0"><</span>body<span class="sy0">></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw2"><?php</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pb</span><span class=
"sy0">-></span><span class="me1">display</span><span class=
"br0">(</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">echo</span> <span class="st0">'<table
width="100%">'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
</div>
</li>
<li class="li1 ln-xtra">
<div class="de1">
<span class="kw1">foreach</span> <span class=
"br0">(</span><span class="re1">$dataSrc</span> <span class=
"kw1">as</span> <span class="re1">$script</span><span class=
"br0">)</span> <span class="br0">{</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw1">if</span> <span class=
"br0">(</span><span class="re1">$pb</span><span class=
"sy0">-></span><span class=
"me1">getPercentComplete</span><span class=
"br0">(</span><span class="br0">)</span> <span class=
"sy0">==</span> <span class="nu0">1</span><span class=
"br0">)</span> <span class="br0">{</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class=
"kw1">break</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="br0">}</span>
</div>
</li>
<li class="li1 ln-xtra">
<div class="de1">
<span class="re1">$ret</span> <span class=
"sy0">=</span> myProcess<span class="br0">(</span><span class=
"br0">)</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="re1">$pb</span><span class=
"sy0">-></span><span class="me1">sleep</span><span class=
"br0">(</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1 ln-xtra">
<div class="de1">
<span class="re1">$pb</span><span class=
"sy0">-></span><span class="me1">moveStep</span><span class=
"br0">(</span><span class="re1">$ret</span><span class=
"br0">)</span><span class="sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="br0">}</span>
</div>
</li>
<li class="li1">
<div class="de1">
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw3">echo</span> <span class=
"st0">'</table>'</span><span class="sy0">;</span>
</div>
</li>
<li class="li1 ln-xtra">
<div class="de1">
<span class="re1">$pb</span><span class=
"sy0">-></span><span class="me1">hide</span><span class=
"br0">(</span><span class="br0">)</span><span class=
"sy0">;</span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="kw2">?></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="sy0"></</span>body<span class="sy0">></span>
</div>
</li>
<li class="li1">
<div class="de1">
<span class="sy0"></</span>html<span class="sy0">></span>
</div>
</li>
</ol>
</div>
<p>
Lets review this example step by step :
</p>
<div class="variablelist">
<dl>
<dt>
<span class="term">Line 4 :</span>
</dt>
<dd>
<p>
<code class="varname">$dataSrc</code> identify again the data
source. Five call to <code class=
"filename">pearimage.php</code> script.
</p>
</dd>
<dt>
<span class="term">Lines 6-19 :</span>
</dt>
<dd>
<p>
<code class="function">myProcess</code> is defined as a
reusable function and not a callback for progress meter.
</p>
</dd>
<dt>
<span class="term">Lines 37-44 :</span>
</dt>
<dd>
<p>
<code class="methodname">run()</code> method was replaced by a
for-each loop. We must :
</p>
<div class="orderedlist">
<ol type="1">
<li>check if progress meter reach 100% (<code class=
"methodname">getPercentComplete()</code> method).
</li>
<li>refresh display with right method depending on strategy
used.
</li>
</ol>
</div>
</dd>
<dt>
<span class="term">Lines 18, 41, 43 :</span>
</dt>
<dd>
<p>
We use again the same <span class=
"emphasis"><em>moveStep</em></span> strategy.
</p>
</dd>
<dt>
<span class="term">Line 47 :</span>
</dt>
<dd>
<p>
Task is completed, five logo built and shown. The progress bar
is hidden.
</p>
</dd>
</dl>
</div>
</div>
</div>
<table class="progress2Footer">
<tr>
<td align="left">
HTML_Progress2 : The Definitive Guide
</td>
<td align="right">
v 2.4.0 : April 20, 2007
</td>
</tr>
</table>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left">
<a accesskey="p" href="ch05.html">Prev</a>
</td>
<td width="20%" align="center">
<a accesskey="u" href="ch05.html">Up</a>
</td>
<td width="40%" align="right">
<a accesskey="n" href="ch05s03.html">Next</a>
</td>
</tr>
<tr>
<td width="40%" align="left" valign="top">
Chapter 5. Quick Start with HTML_Progress2
</td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top">
Strategy of handling
</td>
</tr>
</table>
</div>
</body>
</html>
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