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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: X3DFields: Class TSFLong</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="TSFLong"></a><h1 class="cio">Class TSFLong</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><a class="section" href="#PasDoc-Fields">Fields</a></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="X3DFields.html">X3DFields</a></p>
<h2 class="declaration">Declaration</h2>
<p class="declaration">
<code>type TSFLong = class(<a class="normal" href="X3DFields.TX3DSingleField.html">TX3DSingleField</a>)</code></p>
<h2 class="description">Description</h2>
<div class="nodescription">no description available, TX3DSingleField description follows</div><div class="nodescription">no description available, TX3DField description follows</div><p>
Base class for all VRML/X3D fields.
<p>Common notes for all descendants: most of them expose field or property "Value", this is (surprise, surprise!) the value of the field. Many of them also expose DefaultValue and DefaultValueExists fields/properties, these should be the default VRML value for this field. You can even change DefaultValue after the object is created.
<p>Most of descendants include constructor that initializes both DefaultValue and Value to the same thing, as this is what you usually want.
<p>Some notes about <code>Assign</code> method (inherited from TPersistent and overridied appropriately in <code>TX3DField</code> descendants):
<p></p>
<ol class="paragraph_spacing">
<li value="1"><p>There are some exceptions, but usually assignment is possible only when source and destination field classes are equal.</p></li>
<li value="2"><p>Assignment (by <code>Assign</code>, inherited from TPersistent) tries to copy everything: name (with alternative names), default value, <a class="normal" href="X3DFields.TX3DFieldOrEvent.html#IsClauseNames">IsClauseNames</a>, <a class="normal" href="X3DFields.TX3DField.html#ValueFromIsClause">ValueFromIsClause</a>, Exposed, and of course current value.
<p>Exceptions are things related to hierarchy of containers: <a class="normal" href="X3DFields.TX3DFieldOrEvent.html#ParentNode">ParentNode</a>, <a class="normal" href="X3DFields.TX3DFieldOrEvent.html#ParentInterfaceDeclaration">ParentInterfaceDeclaration</a>. Also <a class="normal" href="X3DFields.TX3DField.html#ExposedEventsLinked">ExposedEventsLinked</a>.
<p>If you want to copy only the current value, use <a class="normal" href="X3DFields.TX3DField.html#AssignValue">AssignValue</a> (or <a class="normal" href="X3DFields.TX3DField.html#AssignLerp">AssignLerp</a>, where available).</p></li>
</ol>
<p></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.TX3DSingleField.html">TX3DSingleField</a></li>
<li class="thisitem">TSFLong</li></ul><h2 class="overview">Overview</h2>
<a name="PasDoc-Fields"></a><h3 class="summary">Fields</h3>
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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><b><a href="X3DFields.TSFLong.html#DefaultValue">DefaultValue</a></b>: Longint;</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><b><a href="X3DFields.TSFLong.html#DefaultValueExists">DefaultValueExists</a></b>: boolean;</code></td>
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<a name="PasDoc-Methods"></a><h3 class="summary">Methods</h3>
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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="X3DFields.TSFLong.html#SaveToStreamValue">SaveToStreamValue</a></b>(Writer: <a href="X3DFields.TX3DWriter.html">TX3DWriter</a>); override;</code></td>
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<td class="itemcode"><code>constructor <b><a href="X3DFields.TSFLong.html#Create">Create</a></b>(AParentNode: <a href="X3DFields.TX3DFileItem.html">TX3DFileItem</a>; const AName: string; const AValue: Longint); overload;</code></td>
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<td class="itemcode"><code>constructor <b><a href="X3DFields.TSFLong.html#Create">Create</a></b>(AParentNode: <a href="X3DFields.TX3DFileItem.html">TX3DFileItem</a>; const AName: string; const AValue: Longint; AMustBeNonnegative: boolean); overload;</code></td>
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<td class="itemcode"><code>procedure <b><a href="X3DFields.TSFLong.html#ParseValue">ParseValue</a></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"><code>function <b><a href="X3DFields.TSFLong.html#EqualsDefaultValue">EqualsDefaultValue</a></b>: boolean; override;</code></td>
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<td class="itemcode"><code>function <b><a href="X3DFields.TSFLong.html#Equals">Equals</a></b>(SecondValue: <a href="X3DFields.TX3DField.html">TX3DField</a>; const EqualityEpsilon: Double): boolean; override;</code></td>
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<td class="itemcode"><code>function <b><a href="X3DFields.TSFLong.html#FastEqualsValue">FastEqualsValue</a></b>(SecondValue: <a href="X3DFields.TX3DField.html">TX3DField</a>): boolean; override;</code></td>
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<td class="itemcode"><code>procedure <b><a href="X3DFields.TSFLong.html#Assign">Assign</a></b>(Source: TPersistent); override;</code></td>
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<td class="itemcode"><code>procedure <b><a href="X3DFields.TSFLong.html#AssignValue">AssignValue</a></b>(Source: <a href="X3DFields.TX3DField.html">TX3DField</a>); override;</code></td>
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<td class="itemcode"><code>procedure <b><a href="X3DFields.TSFLong.html#AssignDefaultValueFromValue">AssignDefaultValueFromValue</a></b>; override;</code></td>
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<td class="itemcode"><code>class function <b><a href="X3DFields.TSFLong.html#TypeName">TypeName</a></b>: string; override;</code></td>
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<td class="itemcode"><code>class function <b><a href="X3DFields.TSFLong.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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<td class="itemcode"><code>procedure <b><a href="X3DFields.TSFLong.html#Send">Send</a></b>(const AValue: LongInt); virtual; overload;</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="X3DFields.TSFLong.html#Value">Value</a></b>: Longint read FValue write SetValue;</code></td>
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<td class="itemcode"><code>property <b><a href="X3DFields.TSFLong.html#MustBeNonnegative">MustBeNonnegative</a></b>: boolean read FMustBeNonnegative default false;</code></td>
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<h2 class="description">Description</h2>
<h3 class="detail">Fields</h3>
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<td class="itemcode"><a name="DefaultValue"></a><code><b>DefaultValue</b>: Longint;</code></td>
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<td class="itemcode"><a name="DefaultValueExists"></a><code><b>DefaultValueExists</b>: boolean;</code></td>
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<h3 class="detail">Methods</h3>
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<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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<td class="itemcode"><a name="Create"></a><code>constructor <b>Create</b>(AParentNode: <a href="X3DFields.TX3DFileItem.html">TX3DFileItem</a>; const AName: string; const AValue: Longint); overload;</code></td>
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<td class="itemcode"><a name="Create"></a><code>constructor <b>Create</b>(AParentNode: <a href="X3DFields.TX3DFileItem.html">TX3DFileItem</a>; const AName: string; const AValue: Longint; AMustBeNonnegative: boolean); overload;</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="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="FastEqualsValue"></a><code>function <b>FastEqualsValue</b>(SecondValue: <a href="X3DFields.TX3DField.html">TX3DField</a>): 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="Send"></a><code>procedure <b>Send</b>(const AValue: LongInt); virtual; overload;</code></td>
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<h3 class="detail">Properties</h3>
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<td class="itemcode"><a name="Value"></a><code>property <b>Value</b>: Longint read FValue write SetValue;</code></td>
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<td class="itemcode"><a name="MustBeNonnegative"></a><code>property <b>MustBeNonnegative</b>: boolean read FMustBeNonnegative default false;</code></td>
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<p>
See <a class="normal" href="X3DFields.TSFFloat.html#MustBeNonnegative">TSFFloat.MustBeNonnegative</a> for explanation of this.</p>
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