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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">
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<title>Castle Game Engine: X3DNodes: Class TMFNode</title>
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<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="TMFNode"></a><h1 class="cio">Class TMFNode</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 TMFNode = class(<a class="normal" href="X3DFields.TX3DMultField.html">TX3DMultField</a>)</code></p>
<h2 class="description">Description</h2>
<p>
VRML/X3D field holding a list of nodes.
<p>Just like SFNode, it's defined in this unit, as it uses <a class="normal" href="X3DNodes.TX3DNode.html">TX3DNode</a>. Note that items of MFNode <i>cannot</i> be nil (i.e. VRML/X3D doesn't allow to use NULL inside MFNode), contrary to SFNode.
<p>Note that <code>TMFNode</code> implementation doesn't use <a class="normal" href="X3DFields.TX3DSimpleMultField.html">TX3DSimpleMultField</a>. One reason is that we don't want to parse MFNode items by SFNode parser, because MFNode doesn't allow NULL items. (In the past, another argument was that we want to use <a class="normal" href="X3DNodes.TX3DNodeList.html">TX3DNodeList</a> and it wasn't compatible with <a class="normal" href="X3DFields.TX3DSimpleMultField.html">TX3DSimpleMultField</a>. But now <a class="normal" href="X3DNodes.TX3DNodeList.html">TX3DNodeList</a> descends from TFPSList, so it isn't a problem.)
<p>Just like for <a class="normal" href="X3DNodes.TSFNode.html">TSFNode</a>: Note that we store AllowedChildren list, which is a list of classes allowed as Items. But this is used only to produce warnings for a user. You should never assert that every item actually is one the requested classes.</p>
<a name="PasDoc-Hierarchy"></a><h2 class="hierarchy">Hierarchy</h2>
<ul class="hierarchy"><li class="ancestor">TPersistent</li>
<li class="ancestor"><a class="normal" href="CastleInterfaces.TNonRefCountedInterfacedPersistent.html">TNonRefCountedInterfacedPersistent</a></li>
<li class="ancestor"><a class="normal" href="X3DFields.TX3DFileItem.html">TX3DFileItem</a></li>
<li class="ancestor"><a class="normal" href="X3DFields.TX3DFieldOrEvent.html">TX3DFieldOrEvent</a></li>
<li class="ancestor"><a class="normal" href="X3DFields.TX3DField.html">TX3DField</a></li>
<li class="ancestor"><a class="normal" href="X3DFields.TX3DMultField.html">TX3DMultField</a></li>
<li class="thisitem">TMFNode</li></ul><h2 class="overview">Overview</h2>
<a name="PasDoc-Methods"></a><h3 class="summary">Methods</h3>
<table class="summary wide_list">
<tr class="list">
<td class="visibility"><a href="legend.html"><img src="protected.gif" alt="Protected" title="Protected"></a></td>
<td class="itemcode"><code>procedure <b><a href="X3DNodes.TMFNode.html#SaveToStreamValue">SaveToStreamValue</a></b>(Writer: <a href="X3DFields.TX3DWriter.html">TX3DWriter</a>); override;</code></td>
</tr>
<tr class="list2">
<td class="visibility"><a href="legend.html"><img src="protected.gif" alt="Protected" title="Protected"></a></td>
<td class="itemcode"><code>function <b><a href="X3DNodes.TMFNode.html#SaveToXmlValue">SaveToXmlValue</a></b>: <a href="X3DFields.html#TSaveToXmlMethod">TSaveToXmlMethod</a>; override;</code></td>
</tr>
<tr class="list">
<td class="visibility"><a href="legend.html"><img src="protected.gif" alt="Protected" title="Protected"></a></td>
<td class="itemcode"><code>function <b><a href="X3DNodes.TMFNode.html#GetCount">GetCount</a></b>: Integer; override;</code></td>
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<td class="visibility"><a href="legend.html"><img src="protected.gif" alt="Protected" title="Protected"></a></td>
<td class="itemcode"><code>procedure <b><a href="X3DNodes.TMFNode.html#SetCount">SetCount</a></b>(const Value: Integer); override;</code></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"><code>constructor <b><a href="X3DNodes.TMFNode.html#CreateUndefined">CreateUndefined</a></b>(AParentNode: <a href="X3DFields.TX3DFileItem.html">TX3DFileItem</a>; const AName: string; const AExposed: boolean); 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>constructor <b><a href="X3DNodes.TMFNode.html#Create">Create</a></b>(AParentNode: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>; const AName: string; const AAllowedChildrenClasses: array of <a href="X3DNodes.html#TX3DNodeClass">TX3DNodeClass</a>); overload;</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>constructor <b><a href="X3DNodes.TMFNode.html#Create">Create</a></b>(AParentNode: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>; const AName: string; AAllowedChildrenClasses: <a href="X3DNodes.TX3DNodeClassesList.html">TX3DNodeClassesList</a>); overload;</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>constructor <b><a href="X3DNodes.TMFNode.html#Create">Create</a></b>(AParentNode: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>; const AName: string; AnAllowedChildrenInterface: TGUID); overload;</code></td>
</tr>
<tr class="list">
<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.TMFNode.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.TMFNode.html#Add">Add</a></b>(Node: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>); overload;</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.TMFNode.html#Add">Add</a></b>(Position: Integer; Node: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>); overload;</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.TMFNode.html#Delete">Delete</a></b>(Index: Integer);</code></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"><code>function <b><a href="X3DNodes.TMFNode.html#Remove">Remove</a></b>(const Node: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>): Integer;</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.TMFNode.html#Extract">Extract</a></b>(Index: Integer): <a href="X3DNodes.TX3DNode.html">TX3DNode</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.TMFNode.html#Clear">Clear</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>procedure <b><a href="X3DNodes.TMFNode.html#AssignItems">AssignItems</a></b>(SourceItems: <a href="X3DNodes.TX3DNodeList.html">TX3DNodeList</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.TMFNode.html#Replace">Replace</a></b>(Index: Integer; Node: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>);</code></td>
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<tr class="list2">
<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.TMFNode.html#ParseValue">ParseValue</a></b>(Lexer: <a href="X3DLexer.TX3DLexer.html">TX3DLexer</a>; Reader: <a href="X3DFields.TX3DReader.html">TX3DReader</a>); override;</code></td>
</tr>
<tr class="list">
<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.TMFNode.html#ParseXMLAttribute">ParseXMLAttribute</a></b>(const AttributeValue: string; Reader: <a href="X3DFields.TX3DReader.html">TX3DReader</a>); override;</code></td>
</tr>
<tr class="list2">
<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.TMFNode.html#ParseXMLElement">ParseXMLElement</a></b>(Element: TDOMElement; Reader: <a href="X3DFields.TX3DReader.html">TX3DReader</a>); override;</code></td>
</tr>
<tr class="list">
<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.TMFNode.html#EqualsDefaultValue">EqualsDefaultValue</a></b>: boolean; override;</code></td>
</tr>
<tr class="list2">
<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.TMFNode.html#Equals">Equals</a></b>(SecondValue: <a href="X3DFields.TX3DField.html">TX3DField</a>; const EqualityEpsilon: Double): boolean; override;</code></td>
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<tr class="list">
<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.TMFNode.html#Assign">Assign</a></b>(Source: TPersistent); override;</code></td>
</tr>
<tr class="list2">
<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.TMFNode.html#AssignValue">AssignValue</a></b>(Source: <a href="X3DFields.TX3DField.html">TX3DField</a>); override;</code></td>
</tr>
<tr class="list">
<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.TMFNode.html#AssignDefaultValueFromValue">AssignDefaultValueFromValue</a></b>; override;</code></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"><code>class function <b><a href="X3DNodes.TMFNode.html#TypeName">TypeName</a></b>: string; override;</code></td>
</tr>
<tr class="list">
<td class="visibility"><a href="legend.html"><img src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>class function <b><a href="X3DNodes.TMFNode.html#CreateEvent">CreateEvent</a></b>(const AParentNode: <a href="X3DFields.TX3DFileItem.html">TX3DFileItem</a>; const AName: string; const AInEvent: boolean): <a href="X3DFields.TX3DEvent.html">TX3DEvent</a>; override;</code></td>
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<tr class="list2">
<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.TMFNode.html#WarningIfChildNotAllowed">WarningIfChildNotAllowed</a></b>(Child: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>);</code></td>
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<tr class="list">
<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.TMFNode.html#ChildAllowed">ChildAllowed</a></b>(Child: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>): boolean;</code></td>
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<tr class="list2">
<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.TMFNode.html#AssignDefaultItems">AssignDefaultItems</a></b>(SourceItems: <a href="X3DNodes.TX3DNodeList.html">TX3DNodeList</a>);</code></td>
</tr>
<tr class="list">
<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.TMFNode.html#ClearDefault">ClearDefault</a></b>;</code></td>
</tr>
<tr class="list2">
<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.TMFNode.html#EnumerateValid">EnumerateValid</a></b>(Func: <a href="X3DNodes.html#TEnumerateChildrenFunction">TEnumerateChildrenFunction</a>);</code></td>
</tr>
</table>
<a name="PasDoc-Properties"></a><h3 class="summary">Properties</h3>
<table class="summary 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"><code>property <b><a href="X3DNodes.TMFNode.html#Items">Items</a></b>: <a href="X3DNodes.TX3DNodeList.html">TX3DNodeList</a> read FItems;</code></td>
</tr>
<tr class="list2">
<td class="visibility"><a href="legend.html"><img src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>property <b><a href="X3DNodes.TMFNode.html#ItemsArray">ItemsArray</a></b>[Index:Integer]: <a href="X3DNodes.TX3DNode.html">TX3DNode</a> read GetItems;</code></td>
</tr>
<tr class="list">
<td class="visibility"><a href="legend.html"><img src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>property <b><a href="X3DNodes.TMFNode.html#ParentNode">ParentNode</a></b>: <a href="X3DNodes.TX3DNode.html">TX3DNode</a> read FParentNode;</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>property <b><a href="X3DNodes.TMFNode.html#DefaultItems">DefaultItems</a></b>: <a href="X3DNodes.TX3DNodeList.html">TX3DNodeList</a> read FDefaultItems;</code></td>
</tr>
<tr class="list">
<td class="visibility"><a href="legend.html"><img src="public.gif" alt="Public" title="Public"></a></td>
<td class="itemcode"><code>property <b><a href="X3DNodes.TMFNode.html#DefaultValueExists">DefaultValueExists</a></b>: boolean
read FDefaultValueExists write FDefaultValueExists default false;</code></td>
</tr>
</table>
<h2 class="description">Description</h2>
<h3 class="detail">Methods</h3>
<table class="detail wide_list">
<tr class="list">
<td class="visibility"><a href="legend.html"><img src="protected.gif" alt="Protected" title="Protected"></a></td>
<td class="itemcode"><a name="SaveToStreamValue"></a><code>procedure <b>SaveToStreamValue</b>(Writer: <a href="X3DFields.TX3DWriter.html">TX3DWriter</a>); override;</code></td>
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<tr><td colspan="2">
</td></tr>
</table>
<table class="detail wide_list">
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<td class="visibility"><a href="legend.html"><img src="protected.gif" alt="Protected" title="Protected"></a></td>
<td class="itemcode"><a name="SaveToXmlValue"></a><code>function <b>SaveToXmlValue</b>: <a href="X3DFields.html#TSaveToXmlMethod">TSaveToXmlMethod</a>; override;</code></td>
</tr>
<tr><td colspan="2">
</td></tr>
</table>
<table class="detail wide_list">
<tr class="list">
<td class="visibility"><a href="legend.html"><img src="protected.gif" alt="Protected" title="Protected"></a></td>
<td class="itemcode"><a name="GetCount"></a><code>function <b>GetCount</b>: Integer; override;</code></td>
</tr>
<tr><td colspan="2">
<p>
Get or set the number of items.
<p>When increasing this, remember that new items of <a class="normal" href="X3DNodes.TMFNode.html">TMFNode</a> will be <code>Nil</code>. You <b>must immediately initialize them to something else then <code>Nil</code></b> by the <a class="normal" href="X3DNodes.TMFNode.html#Replace">Replace</a> method. Other <a class="normal" href="X3DNodes.TMFNode.html">TMFNode</a> methods, and outside code working with MFNodes, usually assumes that all MFNode children are non-nil. (As VRML/X3D spec don't really allow NULL items inside MFNode fields.) </p>
</td></tr>
</table>
<table class="detail wide_list">
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<td class="itemcode"><a name="SetCount"></a><code>procedure <b>SetCount</b>(const Value: Integer); override;</code></td>
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<td class="itemcode"><a name="CreateUndefined"></a><code>constructor <b>CreateUndefined</b>(AParentNode: <a href="X3DFields.TX3DFileItem.html">TX3DFileItem</a>; const AName: string; const AExposed: boolean); override;</code></td>
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Construct a field allowing any children class. Suitable only for special cases. For example, in instantiated prototypes, we must initially just allow all children, otherwise valid prototypes with SFNode/MFNode would cause warnings when parsing.</p>
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<td class="itemcode"><a name="Create"></a><code>constructor <b>Create</b>(AParentNode: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>; const AName: string; const AAllowedChildrenClasses: array of <a href="X3DNodes.html#TX3DNodeClass">TX3DNodeClass</a>); overload;</code></td>
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<td class="itemcode"><a name="Create"></a><code>constructor <b>Create</b>(AParentNode: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>; const AName: string; AAllowedChildrenClasses: <a href="X3DNodes.TX3DNodeClassesList.html">TX3DNodeClassesList</a>); overload;</code></td>
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Constructor that takes a list of allowed children classes. Note that we copy the contents of AAllowedChildrenClasses, not the reference.</p>
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<td class="itemcode"><a name="Create"></a><code>constructor <b>Create</b>(AParentNode: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>; const AName: string; AnAllowedChildrenInterface: TGUID); overload;</code></td>
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Constructor that allows as children any implementor of given interface.</p>
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<td class="itemcode"><a name="Destroy"></a><code>destructor <b>Destroy</b>; override;</code></td>
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<td class="itemcode"><a name="Add"></a><code>procedure <b>Add</b>(Node: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>); overload;</code></td>
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<td class="itemcode"><a name="Add"></a><code>procedure <b>Add</b>(Position: Integer; Node: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>); overload;</code></td>
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<td class="itemcode"><a name="Delete"></a><code>procedure <b>Delete</b>(Index: Integer);</code></td>
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<td class="itemcode"><a name="Remove"></a><code>function <b>Remove</b>(const Node: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>): Integer;</code></td>
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Search list for given node, and, if found, remove it. Returns the index of removed item, or -1 if not found.</p>
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<td class="itemcode"><a name="Extract"></a><code>function <b>Extract</b>(Index: Integer): <a href="X3DNodes.TX3DNode.html">TX3DNode</a>;</code></td>
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Remove child with given Index, and return it, <i>never freeing it</i>. This is analogous to TX3DNode.ExtractChild, see there for more explanation.</p>
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<td class="itemcode"><a name="Clear"></a><code>procedure <b>Clear</b>;</code></td>
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<td class="itemcode"><a name="AssignItems"></a><code>procedure <b>AssignItems</b>(SourceItems: <a href="X3DNodes.TX3DNodeList.html">TX3DNodeList</a>);</code></td>
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<td class="itemcode"><a name="Replace"></a><code>procedure <b>Replace</b>(Index: Integer; Node: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>);</code></td>
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<td class="itemcode"><a name="ParseValue"></a><code>procedure <b>ParseValue</b>(Lexer: <a href="X3DLexer.TX3DLexer.html">TX3DLexer</a>; Reader: <a href="X3DFields.TX3DReader.html">TX3DReader</a>); override;</code></td>
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<td class="itemcode"><a name="ParseXMLAttribute"></a><code>procedure <b>ParseXMLAttribute</b>(const AttributeValue: string; Reader: <a href="X3DFields.TX3DReader.html">TX3DReader</a>); override;</code></td>
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<td class="itemcode"><a name="ParseXMLElement"></a><code>procedure <b>ParseXMLElement</b>(Element: TDOMElement; Reader: <a href="X3DFields.TX3DReader.html">TX3DReader</a>); override;</code></td>
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<td class="itemcode"><a name="EqualsDefaultValue"></a><code>function <b>EqualsDefaultValue</b>: boolean; override;</code></td>
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<td class="itemcode"><a name="Equals"></a><code>function <b>Equals</b>(SecondValue: <a href="X3DFields.TX3DField.html">TX3DField</a>; const EqualityEpsilon: Double): boolean; override;</code></td>
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<td class="itemcode"><a name="Assign"></a><code>procedure <b>Assign</b>(Source: TPersistent); override;</code></td>
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<td class="itemcode"><a name="AssignValue"></a><code>procedure <b>AssignValue</b>(Source: <a href="X3DFields.TX3DField.html">TX3DField</a>); override;</code></td>
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<td class="itemcode"><a name="AssignDefaultValueFromValue"></a><code>procedure <b>AssignDefaultValueFromValue</b>; override;</code></td>
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<td class="itemcode"><a name="TypeName"></a><code>class function <b>TypeName</b>: string; override;</code></td>
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<td class="itemcode"><a name="CreateEvent"></a><code>class function <b>CreateEvent</b>(const AParentNode: <a href="X3DFields.TX3DFileItem.html">TX3DFileItem</a>; const AName: string; const AInEvent: boolean): <a href="X3DFields.TX3DEvent.html">TX3DEvent</a>; override;</code></td>
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<td class="itemcode"><a name="WarningIfChildNotAllowed"></a><code>procedure <b>WarningIfChildNotAllowed</b>(Child: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>);</code></td>
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Checks is Child allowed on the list of nodes of this MFNode, and makes <a class="normal" href="CastleWarnings.html#OnWarning">OnWarning</a> if not.
<p>Check is allowed is done looking at AllowedChildrenAll and AllowedChildren properties.
<p>Child must not be <code>Nil</code>.
<p><a class="normal" href="CastleWarnings.html#OnWarning">OnWarning</a> message will suggest that this Child is added to this node. In other words, you should only pass as Child a node that you want to add (e.g. by <a class="normal" href="X3DNodes.TMFNode.html#Add">Add</a>) to this field, otherwise <a class="normal" href="CastleWarnings.html#OnWarning">OnWarning</a> message will be a little unsensible.</p>
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<td class="itemcode"><a name="ChildAllowed"></a><code>function <b>ChildAllowed</b>(Child: <a href="X3DNodes.TX3DNode.html">TX3DNode</a>): boolean;</code></td>
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<td class="itemcode"><a name="AssignDefaultItems"></a><code>procedure <b>AssignDefaultItems</b>(SourceItems: <a href="X3DNodes.TX3DNodeList.html">TX3DNodeList</a>);</code></td>
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Operate on <a class="normal" href="X3DNodes.TMFNode.html#DefaultItems">DefaultItems</a>, just like analogous <a class="normal" href="X3DNodes.TMFNode.html#AssignItems">AssignItems</a> and Clear. </p>
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<td class="itemcode"><a name="ClearDefault"></a><code>procedure <b>ClearDefault</b>;</code></td>
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<td class="itemcode"><a name="EnumerateValid"></a><code>procedure <b>EnumerateValid</b>(Func: <a href="X3DNodes.html#TEnumerateChildrenFunction">TEnumerateChildrenFunction</a>);</code></td>
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Calls Func for all current children that are valid (allowed by <a class="normal" href="X3DNodes.TMFNode.html#ChildAllowed">ChildAllowed</a>).
<p>The main use for this is to simplify implementation of <a class="normal" href="X3DNodes.TX3DNode.html#DirectEnumerateActive">TX3DNode.DirectEnumerateActive</a> overrides in <a class="normal" href="X3DNodes.TX3DNode.html">TX3DNode</a> descendants.</p>
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<h3 class="detail">Properties</h3>
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<td class="itemcode"><a name="Items"></a><code>property <b>Items</b>: <a href="X3DNodes.TX3DNodeList.html">TX3DNodeList</a> read FItems;</code></td>
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Lists items of this field.
<p>Do not modify this list explicitly. Use only methods in this class like <a class="normal" href="X3DNodes.TMFNode.html#Add">Add</a>. They take care of calling appropriate AddParentField / RemoveParentField, otherwise you could break reference-counting of nodes by ParentFields.</p>
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<td class="itemcode"><a name="ItemsArray"></a><code>property <b>ItemsArray</b>[Index:Integer]: <a href="X3DNodes.TX3DNode.html">TX3DNode</a> read GetItems;</code></td>
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<td class="itemcode"><a name="ParentNode"></a><code>property <b>ParentNode</b>: <a href="X3DNodes.TX3DNode.html">TX3DNode</a> read FParentNode;</code></td>
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<td class="itemcode"><a name="DefaultItems"></a><code>property <b>DefaultItems</b>: <a href="X3DNodes.TX3DNodeList.html">TX3DNodeList</a> read FDefaultItems;</code></td>
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Lists default items of this field.
<p>Do not modify this list explicitly. Use only methods in this class like <a class="normal" href="X3DNodes.TMFNode.html#AssignDefaultItems">AssignDefaultItems</a> (they take care of calling appropriate AddParentField / RemoveParentField, otherwise you could break reference-counting of nodes by ParentFields).</p>
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<td class="itemcode"><a name="DefaultValueExists"></a><code>property <b>DefaultValueExists</b>: boolean
read FDefaultValueExists write FDefaultValueExists default false;</code></td>
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