File: X3DNodes.TNodesManager.html

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<title>Castle Game Engine: X3DNodes: Class TNodesManager</title>
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<table class="container"><tr><td class="navigation">
<h2>Castle Game Engine</h2><p><a href="introduction.html" class="navigation">Introduction</a></p><p><a href="AllUnits.html" class="navigation">Units</a></p><p><a href="ClassHierarchy.html" class="navigation">Class Hierarchy</a></p><p><a href="AllClasses.html" class="navigation">Classes, Interfaces, Objects and Records</a></p><p><a href="AllTypes.html" class="navigation">Types</a></p><p><a href="AllVariables.html" class="navigation">Variables</a></p><p><a href="AllConstants.html" class="navigation">Constants</a></p><p><a href="AllFunctions.html" class="navigation">Functions and Procedures</a></p><p><a href="AllIdentifiers.html" class="navigation">Identifiers</a></p></td><td class="content">
<a name="TNodesManager"></a><h1 class="cio">Class TNodesManager</h1>
<table class="sections wide_list">
<tr>
<td><a class="section" href="#PasDoc-Description">Description</a></td><td><a class="section" href="#PasDoc-Hierarchy">Hierarchy</a></td><td>Fields</td><td><a class="section" href="#PasDoc-Methods">Methods</a></td><td><a class="section" href="#PasDoc-Properties">Properties</a></td></tr></table>
<a name="PasDoc-Description"></a><h2 class="unit">Unit</h2>
<p class="unitlink">
<a  href="X3DNodes.html">X3DNodes</a></p>
<h2 class="declaration">Declaration</h2>
<p class="declaration">
<code>type TNodesManager = class(TObject)</code></p>
<h2 class="description">Description</h2>
<a name="PasDoc-Hierarchy"></a><h2 class="hierarchy">Hierarchy</h2>
<ul class="hierarchy"><li class="ancestor">TObject</li>
<li class="thisitem">TNodesManager</li></ul><h2 class="overview">Overview</h2>
<a name="PasDoc-Methods"></a><h3 class="summary">Methods</h3>
<table class="summary wide_list">
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>constructor <b><a  href="X3DNodes.TNodesManager.html#Create">Create</a></b>;</code></td>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>destructor <b><a  href="X3DNodes.TNodesManager.html#Destroy">Destroy</a></b>; override;</code></td>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>procedure <b><a  href="X3DNodes.TNodesManager.html#RegisterNodeClass">RegisterNodeClass</a></b>(NodeClass: <a  href="X3DNodes.html#TX3DNodeClass">TX3DNodeClass</a>);</code></td>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>procedure <b><a  href="X3DNodes.TNodesManager.html#RegisterNodeClasses">RegisterNodeClasses</a></b>(const NodeClasses: array of <a  href="X3DNodes.html#TX3DNodeClass">TX3DNodeClass</a>);</code></td>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>procedure <b><a  href="X3DNodes.TNodesManager.html#UnRegisterNodeClass">UnRegisterNodeClass</a></b>(NodeClass: <a  href="X3DNodes.html#TX3DNodeClass">TX3DNodeClass</a>; ErrorIfNotRegistered: boolean = true);</code></td>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>function <b><a  href="X3DNodes.TNodesManager.html#NodeTypeNameToClass">NodeTypeNameToClass</a></b>(const ANodeTypeName: string; const Version: <a  href="X3DNodes.html#TX3DVersion">TX3DVersion</a>): <a  href="X3DNodes.html#TX3DNodeClass">TX3DNodeClass</a>;</code></td>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>function <b><a  href="X3DNodes.TNodesManager.html#URNToClass">URNToClass</a></b>(const URN: string): <a  href="X3DNodes.html#TX3DNodeClass">TX3DNodeClass</a>;</code></td>
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<td class="itemcode"><code>function <b><a  href="X3DNodes.TNodesManager.html#RegisteredCount">RegisteredCount</a></b>: Cardinal;</code></td>
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<a name="PasDoc-Properties"></a><h3 class="summary">Properties</h3>
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<td class="itemcode"><code>property <b><a  href="X3DNodes.TNodesManager.html#Registered">Registered</a></b> [Index:Integer]: <a  href="X3DNodes.html#TX3DNodeClass">TX3DNodeClass</a> read GetRegistered;</code></td>
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<h2 class="description">Description</h2>
<h3 class="detail">Methods</h3>
<table class="detail wide_list">
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><a name="Create"></a><code>constructor <b>Create</b>;</code></td>
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&nbsp;</td></tr>
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<td class="itemcode"><a name="Destroy"></a><code>destructor <b>Destroy</b>; override;</code></td>
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&nbsp;</td></tr>
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<td class="itemcode"><a name="RegisterNodeClass"></a><code>procedure <b>RegisterNodeClass</b>(NodeClass: <a  href="X3DNodes.html#TX3DNodeClass">TX3DNodeClass</a>);</code></td>
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<tr><td colspan="2">
<p>
Make the given node class known to the parser and other routines. We associate the node class with it's <a class="normal" href="X3DNodes.TX3DNode.html#ClassNodeTypeName">TX3DNode.ClassNodeTypeName</a> (make sure it's not empty).

<p>It is OK to register two different node classes with the same node. For example, VRML 1.0 <a class="normal" href="X3DNodes.TConeNode_1.html">TConeNode_1</a> class and VRML 2.0/X3D <a class="normal" href="X3DNodes.html#TConeNode_2">TConeNode_2</a> class both have a name 'Cone' (and will be correctly chosen during parsing). But you cannot register two times the same NodeClass.

<p></p>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><a name="RegisterNodeClasses"></a><code>procedure <b>RegisterNodeClasses</b>(const NodeClasses: array of <a  href="X3DNodes.html#TX3DNodeClass">TX3DNodeClass</a>);</code></td>
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&nbsp;</td></tr>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><a name="UnRegisterNodeClass"></a><code>procedure <b>UnRegisterNodeClass</b>(NodeClass: <a  href="X3DNodes.html#TX3DNodeClass">TX3DNodeClass</a>; ErrorIfNotRegistered: boolean = true);</code></td>
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<p>
Unregisters given node class, removing it from our table.

<p></p>
<h6 class="description_section">Exceptions raised</h6>
<dl class="exceptions_raised">
<dt><a class="normal" href="X3DNodes.ENodesManagerError.html">ENodesManagerError</a></dt>
<dd>if NodeClass.ClassNodeTypeName = '' (so it cannot be even registered), or if ((NodeClass was not registered) and ErrorIfNotRegistered)</dd>
</dl>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><a name="NodeTypeNameToClass"></a><code>function <b>NodeTypeNameToClass</b>(const ANodeTypeName: string; const Version: <a  href="X3DNodes.html#TX3DVersion">TX3DVersion</a>): <a  href="X3DNodes.html#TX3DNodeClass">TX3DNodeClass</a>;</code></td>
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<p>
Return node class for a given name. This method is the main purpose of <a class="normal" href="X3DNodes.TNodesManager.html">TNodesManager</a>: to map node names into node classes.

<p>Searches in nodes registered by <a class="normal" href="X3DNodes.TNodesManager.html#RegisterNodeClass">RegisterNodeClass</a> and such. During searching, looks not only for matching node name, but also at matching VRML/X3D version, checking <code>ForVRMLVersion(Version)</code>.

<p>Returns <code>Nil</code> when not found.</p>
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><a name="URNToClass"></a><code>function <b>URNToClass</b>(const URN: string): <a  href="X3DNodes.html#TX3DNodeClass">TX3DNodeClass</a>;</code></td>
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<tr><td colspan="2">
<p>
Return class that matches given URL. This is useful for EXTERNROTOs. Returns <code>Nil</code> if not found.</p>
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<table class="detail wide_list">
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<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><a name="RegisteredCount"></a><code>function <b>RegisteredCount</b>: Cardinal;</code></td>
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<tr><td colspan="2">
&nbsp;</td></tr>
</table>
<h3 class="detail">Properties</h3>
<table class="detail wide_list">
<tr class="list">
<td class="visibility"><a  href="legend.html"><img  src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><a name="Registered"></a><code>property <b>Registered</b> [Index:Integer]: <a  href="X3DNodes.html#TX3DNodeClass">TX3DNodeClass</a> read GetRegistered;</code></td>
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<p>
Enumerate all registered classes, from Registered[0] to Registered[<a class="normal" href="X3DNodes.TNodesManager.html#RegisteredCount">RegisteredCount</a> - 1].

<p></p>
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</table>
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