forked from Mirrorlandia_minetest/irrlicht
220 lines
42 KiB
HTML
220 lines
42 KiB
HTML
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
|
||
|
|
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
|
||
|
|
<meta name="generator" content="Doxygen 1.8.13"/>
|
||
|
|
<meta name="viewport" content="width=device-width, initial-scale=1"/>
|
||
|
|
<title>Tutorial 25: Xml Handling</title>
|
||
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
||
|
|
<!-- Wanted to avoid copying .css to each folder, so copied default .css from doxyen in here, kicked out most stuff we don't need for examples and modified some a little bit.
|
||
|
|
Target was having a single html in each example folder which is created from the main.cpp files and needs no files besides some images below media folder.
|
||
|
|
Feel free to improve :)
|
||
|
|
-->
|
||
|
|
<style>
|
||
|
|
body, table, div, p, dl {
|
||
|
|
font: 400 14px/22px;
|
||
|
|
}
|
||
|
|
body {
|
||
|
|
background-color: #F0F0F0;
|
||
|
|
color: black;
|
||
|
|
margin-left: 5%;
|
||
|
|
margin-right: 5%;
|
||
|
|
}
|
||
|
|
p.reference, p.definition {
|
||
|
|
font: 400 14px/22px;
|
||
|
|
}
|
||
|
|
.title {
|
||
|
|
font: 400 14px/28px;
|
||
|
|
font-size: 150%;
|
||
|
|
font-weight: bold;
|
||
|
|
margin: 10px 2px;
|
||
|
|
}
|
||
|
|
h1, h2, h3, h4, h5, h6 {
|
||
|
|
-webkit-transition: text-shadow 0.5s linear;
|
||
|
|
-moz-transition: text-shadow 0.5s linear;
|
||
|
|
-ms-transition: text-shadow 0.5s linear;
|
||
|
|
-o-transition: text-shadow 0.5s linear;
|
||
|
|
transition: text-shadow 0.5s linear;
|
||
|
|
margin-right: 15px;
|
||
|
|
}
|
||
|
|
caption {
|
||
|
|
font-weight: bold;
|
||
|
|
}
|
||
|
|
h3.version {
|
||
|
|
font-size: 90%;
|
||
|
|
text-align: center;
|
||
|
|
}
|
||
|
|
a {
|
||
|
|
color: #3D578C;
|
||
|
|
font-weight: normal;
|
||
|
|
text-decoration: none;
|
||
|
|
}
|
||
|
|
.contents a:visited {
|
||
|
|
color: #4665A2;
|
||
|
|
}
|
||
|
|
a:hover {
|
||
|
|
text-decoration: underline;
|
||
|
|
}
|
||
|
|
a.el {
|
||
|
|
font-weight: bold;
|
||
|
|
}
|
||
|
|
a.code, a.code:visited, a.line, a.line:visited {
|
||
|
|
color: #4665A2;
|
||
|
|
}
|
||
|
|
a.codeRef, a.codeRef:visited, a.lineRef, a.lineRef:visited {
|
||
|
|
color: #4665A2;
|
||
|
|
}
|
||
|
|
pre.fragment {
|
||
|
|
border: 1px solid #C4CFE5;
|
||
|
|
background-color: #FBFCFD;
|
||
|
|
padding: 4px 6px;
|
||
|
|
margin: 4px 8px 4px 2px;
|
||
|
|
overflow: auto;
|
||
|
|
word-wrap: break-word;
|
||
|
|
font-size: 9pt;
|
||
|
|
line-height: 125%;
|
||
|
|
font-family: monospace, fixed;
|
||
|
|
font-size: 105%;
|
||
|
|
}
|
||
|
|
div.fragment {
|
||
|
|
padding: 0px;
|
||
|
|
margin: 4px 8px 4px 2px;
|
||
|
|
background-color: #FBFCFD;
|
||
|
|
border: 1px solid #C4CFE5;
|
||
|
|
}
|
||
|
|
div.line {
|
||
|
|
font-family: monospace, fixed;
|
||
|
|
font-size: 13px;
|
||
|
|
min-height: 13px;
|
||
|
|
line-height: 1.0;
|
||
|
|
text-wrap: unrestricted;
|
||
|
|
white-space: -moz-pre-wrap; /* Moz */
|
||
|
|
white-space: -pre-wrap; /* Opera 4-6 */
|
||
|
|
white-space: -o-pre-wrap; /* Opera 7 */
|
||
|
|
white-space: pre-wrap; /* CSS3 */
|
||
|
|
word-wrap: break-word; /* IE 5.5+ */
|
||
|
|
text-indent: -53px;
|
||
|
|
padding-left: 53px;
|
||
|
|
padding-bottom: 0px;
|
||
|
|
margin: 0px;
|
||
|
|
-webkit-transition-property: background-color, box-shadow;
|
||
|
|
-webkit-transition-duration: 0.5s;
|
||
|
|
-moz-transition-property: background-color, box-shadow;
|
||
|
|
-moz-transition-duration: 0.5s;
|
||
|
|
-ms-transition-property: background-color, box-shadow;
|
||
|
|
-ms-transition-duration: 0.5s;
|
||
|
|
-o-transition-property: background-color, box-shadow;
|
||
|
|
-o-transition-duration: 0.5s;
|
||
|
|
transition-property: background-color, box-shadow;
|
||
|
|
transition-duration: 0.5s;
|
||
|
|
}
|
||
|
|
div.contents {
|
||
|
|
margin-top: 10px;
|
||
|
|
margin-left: 12px;
|
||
|
|
margin-right: 8px;
|
||
|
|
}
|
||
|
|
div.center {
|
||
|
|
text-align: center;
|
||
|
|
margin-top: 0px;
|
||
|
|
margin-bottom: 0px;
|
||
|
|
padding: 0px;
|
||
|
|
}
|
||
|
|
div.center img {
|
||
|
|
border: 0px;
|
||
|
|
}
|
||
|
|
span.keyword {
|
||
|
|
color: #008000
|
||
|
|
}
|
||
|
|
span.keywordtype {
|
||
|
|
color: #604020
|
||
|
|
}
|
||
|
|
span.keywordflow {
|
||
|
|
color: #e08000
|
||
|
|
}
|
||
|
|
span.comment {
|
||
|
|
color: #800000
|
||
|
|
}
|
||
|
|
span.preprocessor {
|
||
|
|
color: #806020
|
||
|
|
}
|
||
|
|
span.stringliteral {
|
||
|
|
color: #002080
|
||
|
|
}
|
||
|
|
span.charliteral {
|
||
|
|
color: #008080
|
||
|
|
}
|
||
|
|
blockquote {
|
||
|
|
background-color: #F7F8FB;
|
||
|
|
border-left: 2px solid #9CAFD4;
|
||
|
|
margin: 0 24px 0 4px;
|
||
|
|
padding: 0 12px 0 16px;
|
||
|
|
}
|
||
|
|
hr {
|
||
|
|
height: 0px;
|
||
|
|
border: none;
|
||
|
|
border-top: 1px solid #4A6AAA;
|
||
|
|
}
|
||
|
|
address {
|
||
|
|
font-style: normal;
|
||
|
|
color: #2A3D61;
|
||
|
|
}
|
||
|
|
div.header {
|
||
|
|
background-image:url('nav_h.png');
|
||
|
|
background-repeat:repeat-x;
|
||
|
|
background-color: #F9FAFC;
|
||
|
|
margin: 0px;
|
||
|
|
border-bottom: 1px solid #C4CFE5;
|
||
|
|
}
|
||
|
|
div.headertitle {
|
||
|
|
padding: 5px 5px 5px 10px;
|
||
|
|
}
|
||
|
|
.image {
|
||
|
|
text-align: center;
|
||
|
|
}
|
||
|
|
.caption {
|
||
|
|
font-weight: bold;
|
||
|
|
}
|
||
|
|
div.zoom {
|
||
|
|
border: 1px solid #90A5CE;
|
||
|
|
}
|
||
|
|
tr.heading h2 {
|
||
|
|
margin-top: 12px;
|
||
|
|
margin-bottom: 4px;
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
</head>
|
||
|
|
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
|
||
|
|
<!--END TITLEAREA-->
|
||
|
|
<!-- end header part -->
|
||
|
|
<!-- Generated by Doxygen 1.8.13 -->
|
||
|
|
</div><!-- top -->
|
||
|
|
<div class="header">
|
||
|
|
<div class="headertitle">
|
||
|
|
<div class="title">Tutorial 25: Xml Handling </div> </div>
|
||
|
|
</div><!--header-->
|
||
|
|
<div class="contents">
|
||
|
|
<div class="textblock"><div class="image">
|
||
|
|
<img src="../../media/example_screenshots/025shot.jpg" alt="025shot.jpg"/>
|
||
|
|
</div>
|
||
|
|
<p>Demonstrates loading and saving of configurations via XML</p>
|
||
|
|
<dl class="section author"><dt>Author</dt><dd>Y.M. Bosman <<a href="#" onclick="location.href='mai'+'lto:'+'yor'+'an'+'.bo'+'sm'+'an@'+'gm'+'ail'+'.c'+'om'; return false;">yoran<span style="display: none;">.nosp@m.</span>.bos<span style="display: none;">.nosp@m.</span>man@g<span style="display: none;">.nosp@m.</span>mail<span style="display: none;">.nosp@m.</span>.com</a>></dd></dl>
|
||
|
|
<p>This demo features a fully usable system for configuration handling. The code can easily be integrated into own apps.</p>
|
||
|
|
<div class="fragment"><div class="line"><span class="preprocessor">#include <irrlicht.h></span></div><div class="line"><span class="preprocessor">#include "exampleHelper.h"</span></div><div class="line"></div><div class="line"><span class="keyword">using namespace </span>irr;</div><div class="line"><span class="keyword">using namespace </span>core;</div><div class="line"><span class="keyword">using namespace </span>scene;</div><div class="line"><span class="keyword">using namespace </span>video;</div><div class="line"><span class="keyword">using namespace </span>io;</div><div class="line"><span class="keyword">using namespace </span>gui;</div><div class="line"></div><div class="line"><span class="preprocessor">#ifdef _MSC_VER</span></div><div class="line"><span class="preprocessor">#pragma comment(lib, "Irrlicht.lib")</span></div><div class="line"><span class="preprocessor">#endif</span></div></div><!-- fragment --><p> SettingManager class.</p>
|
||
|
|
<p>This class loads and writes the settings and manages the options.</p>
|
||
|
|
<p>The class makes use of irrMap which is a an associative arrays using a red-black tree it allows easy mapping of a key to a value, along the way there is some information on how to use it. </p><div class="fragment"><div class="line"><span class="keyword">class </span>SettingManager</div><div class="line">{</div><div class="line"><span class="keyword">public</span>:</div><div class="line"></div><div class="line"> <span class="comment">// Construct setting managers and set default settings</span></div><div class="line"> SettingManager(<span class="keyword">const</span> stringw& settings_file): SettingsFile(settings_file), NullDevice(0)</div><div class="line"> {</div><div class="line"> <span class="comment">// Irrlicht null device, we want to load settings before we actually created our device, therefore, nulldevice</span></div><div class="line"> NullDevice = irr::createDevice(irr::video::EDT_NULL);</div><div class="line"></div><div class="line"> <span class="comment">//DriverOptions is an irrlicht map,</span></div><div class="line"> <span class="comment">//we can insert values in the map in two ways by calling insert(key,value) or by using the [key] operator</span></div><div class="line"> <span class="comment">//the [] operator overrides values if they already exist</span></div><div class="line"> DriverOptions.insert(L<span class="stringliteral">"Software"</span>, EDT_SOFTWARE);</div><div class="line"> DriverOptions.insert(L<span class="stringliteral">"OpenGL"</span>, EDT_OPENGL);</div><div class="line"> DriverOptions.insert(L<span class="stringliteral">"Direct3D9"</span>, EDT_DIRECT3D9);</div><div class="line"></div><div class="line"> <span class="comment">//some resolution options</span></div><div class="line"> ResolutionOptions.insert(L<span class="stringliteral">"640x480"</span>, dimension2du(640,480));</div><div class="line"> ResolutionOptions.insert(L<span class="stringliteral">"800x600"</span>, dimension2du(800,600));</div><div class="line"> ResolutionOptions.insert(L<span class="stringliteral">"1024x768"</span>, dimension2du(1024,768));</div><div class="line"></div><div class="line"> <span class="comment">//our preferred defaults</span></div><div class="line"> SettingMap.insert(L<span class="stringliteral">"driver"</span>, L<span class="stringliteral">"Direct3D9"</span>);</div><div class="line"> SettingMap.insert(L<span class="stringliteral">"resolution"</span>, L<span class="stringliteral">"640x480"</span>);</div><div class="line"> SettingMap.insert(L<span class="stringliteral">"fullscreen"</span>, L<span class="stringliteral">"0"</span>); <span class="comment">//0 is false</span></div><div class="line"> }</div><div class="line"></div><div class="line"> <span class="comment">// Destructor, you could store settings automatically on exit of your</span></div><div class="line"> <span class="comment">// application if you wanted to in our case we simply drop the</span></div><div class="line"> <span class="comment">// nulldevice</span></div><div class="line"> ~SettingManager()</div><div class="line"> {</div><div class="line"> <span class="keywordflow">if</span> (NullDevice)</div><div class="line"> {</div><div class="line"> NullDevice->closeDevice();</div><div class="line"> NullDevice->drop();</div><div class="line"> }</div><div class="line"> };</div></div><!-- fragment --><p> Load xml from disk, overwrite default settings The xml we are trying to load has the following structure settings nested in sections nested in the root node, like: </p><pre class="fragment"> <pre>
|
||
|
|
<?xml version="1.0"?>
|
||
|
|
<mygame>
|
||
|
|
<video>
|
||
|
|
<setting name="driver" value="Direct3D9" />
|
||
|
|
<setting name="fullscreen" value="0" />
|
||
|
|
<setting name="resolution" value="1024x768" />
|
||
|
|
</video>
|
||
|
|
</mygame>
|
||
|
|
</pre></pre> <div class="fragment"><div class="line"> <span class="keywordtype">bool</span> load()</div><div class="line"> {</div><div class="line"> <span class="comment">//if not able to create device don't attempt to load</span></div><div class="line"> <span class="keywordflow">if</span> (!NullDevice)</div><div class="line"> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"></div><div class="line"> irr::io::IXMLReader* xml = NullDevice->getFileSystem()->createXMLReader(SettingsFile); <span class="comment">//create xml reader</span></div><div class="line"> <span class="keywordflow">if</span> (!xml)</div><div class="line"> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"></div><div class="line"> <span class="keyword">const</span> stringw settingTag(L<span class="stringliteral">"setting"</span>); <span class="comment">//we'll be looking for this tag in the xml</span></div><div class="line"> stringw currentSection; <span class="comment">//keep track of our current section</span></div><div class="line"> <span class="keyword">const</span> stringw videoTag(L<span class="stringliteral">"video"</span>); <span class="comment">//constant for videotag</span></div><div class="line"></div><div class="line"> <span class="comment">//while there is more to read</span></div><div class="line"> <span class="keywordflow">while</span> (xml->read())</div><div class="line"> {</div><div class="line"> <span class="comment">//check the node type</span></div><div class="line"> <span class="keywordflow">switch</span> (xml->getNodeType())</div><div class="line"> {</div><div class="line"> <span class="comment">//we found a new element</span></div><div class="line"> <span class="keywordflow">case</span> irr::io::EXN_ELEMENT:</div><div class="line"> {</div><div class="line"> <span class="comment">//we currently are in the empty or mygame section and find the video tag so we set our current section to video</span></div><div class="line"> <span class="keywordflow">if</span> (currentSection.empty() && videoTag.equals_ignore_case(xml->getNodeName()))</div><div class="line"> {</div><div class="line"> currentSection = videoTag;</div><div class="line"> }</div><div class="line"> <span class="comment">//we are in the video section and we find a setting to parse</span></div><div class="line"> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (currentSection.equals_ignore_case(videoTag) && settingTag.equals_ignore_case(xml->getNodeName() ))</div><div class="line"> {</div><div class="line"> <span class="comment">//read in the key</span></div><div class="line"> stringw key = xml->getAttributeValueSafe(L<span class="stringliteral">"name"</span>);</div><div class="line"> <span class="comment">//if there actually is a key to set</span></div><div class="line"> <span class="keywordflow">if</span> (!key.empty())</div><div class="line"> {</div><div class="line"> <span class="comment">//set the setting in the map to the value,</span></div><div class="line"> <span class="comment">//the [] operator overrides values if they already exist or inserts a new key value</span></div><div class="line"> <span class="comment">//pair into the settings map if it was not defined yet</span></div><div class="line"> SettingMap[key] = xml->getAttributeValueSafe(L<span class="stringliteral">"value"</span>);</div><div class="line"
|
||
|
|
<!-- HTML footer for doxygen 1.8.13-->
|
||
|
|
<!-- start footer part -->
|
||
|
|
<p> </p>
|
||
|
|
</body>
|
||
|
|
</html>
|