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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: CastleSceneCore: Class TX3DBindableStack</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="TX3DBindableStack"></a><h1 class="cio">Class TX3DBindableStack</h1>
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<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>
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<a href="CastleSceneCore.html">CastleSceneCore</a></p>
<h2 class="declaration">Declaration</h2>
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<code>type TX3DBindableStack = class(<a class="normal" href="X3DNodes.TX3DBindableStackBasic.html">TX3DBindableStackBasic</a>)</code></p>
<h2 class="description">Description</h2>
<p>
Stack of bindable nodes (only the top, bound, node is used for rendering/navigation). This keeps a stack of <a class="normal" href="X3DNodes.TAbstractBindableNode.html">TAbstractBindableNode</a>, with comfortable routines to examine top and push/pop from top. The stack is actually stored as a list, with the last item being the top one.</p>
<a name="PasDoc-Hierarchy"></a><h2 class="hierarchy">Hierarchy</h2>
<ul class="hierarchy"><li class="ancestor">TFPGObjectList</li>
<li class="ancestor"><a class="normal" href="X3DNodes.TX3DNodeList.html">TX3DNodeList</a></li>
<li class="ancestor"><a class="normal" href="X3DNodes.TX3DBindableStackBasic.html">TX3DBindableStackBasic</a></li>
<li class="thisitem">TX3DBindableStack</li></ul><h2 class="overview">Overview</h2>
<a name="PasDoc-Methods"></a><h3 class="summary">Methods</h3>
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<td class="itemcode"><code>procedure <b><a href="CastleSceneCore.TX3DBindableStack.html#DoBoundChanged">DoBoundChanged</a></b>; virtual;</code></td>
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<td class="itemcode"><code>procedure <b><a href="CastleSceneCore.TX3DBindableStack.html#DoScheduleBoundChanged">DoScheduleBoundChanged</a></b>;</code></td>
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<td class="itemcode"><code>constructor <b><a href="CastleSceneCore.TX3DBindableStack.html#Create">Create</a></b>(AParentScene: <a href="CastleSceneCore.TCastleSceneCore.html">TCastleSceneCore</a>);</code></td>
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<td class="itemcode"><code>function <b><a href="CastleSceneCore.TX3DBindableStack.html#Top">Top</a></b>: <a href="X3DNodes.TAbstractBindableNode.html">TAbstractBindableNode</a>;</code></td>
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<td class="itemcode"><code>procedure <b><a href="CastleSceneCore.TX3DBindableStack.html#PushIfEmpty">PushIfEmpty</a></b>(Node: <a href="X3DNodes.TAbstractBindableNode.html">TAbstractBindableNode</a>; SendEvents: boolean);</code></td>
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<td class="itemcode"><code>procedure <b><a href="CastleSceneCore.TX3DBindableStack.html#CheckForDeletedNodes">CheckForDeletedNodes</a></b>(const RootNode: <a href="X3DNodes.TX3DRootNode.html">TX3DRootNode</a>; const SendEvents: boolean);</code></td>
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<td class="itemcode"><code>procedure <b><a href="CastleSceneCore.TX3DBindableStack.html#Set_Bind">Set_Bind</a></b>(Node: <a href="X3DNodes.TAbstractBindableNode.html">TAbstractBindableNode</a>; const Value: boolean); override;</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="CastleSceneCore.TX3DBindableStack.html#ParentScene">ParentScene</a></b>: <a href="CastleSceneCore.TCastleSceneCore.html">TCastleSceneCore</a> read FParentScene;</code></td>
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<td class="itemcode"><code>property <b><a href="CastleSceneCore.TX3DBindableStack.html#OnBoundChanged">OnBoundChanged</a></b>: <a href="CastleSceneCore.html#TSceneNotification">TSceneNotification</a>
read FOnBoundChanged write FOnBoundChanged;</code></td>
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<h2 class="description">Description</h2>
<h3 class="detail">Methods</h3>
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<td class="itemcode"><a name="DoBoundChanged"></a><code>procedure <b>DoBoundChanged</b>; virtual;</code></td>
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<p>
Notification when the currently bound node, that is <a class="normal" href="CastleSceneCore.TX3DBindableStack.html#Top">Top</a>, changed. In this class, just calls <a class="normal" href="CastleSceneCore.TX3DBindableStack.html#OnBoundChanged">OnBoundChanged</a> if assigned.</p>
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<td class="itemcode"><a name="DoScheduleBoundChanged"></a><code>procedure <b>DoScheduleBoundChanged</b>;</code></td>
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<p>
Call <a class="normal" href="CastleSceneCore.TX3DBindableStack.html#DoBoundChanged">DoBoundChanged</a> at the nearest comfortable time. Either now (when not inside BeginChangesSchedule / EndChangesSchedule) or at a closing EndChangesSchedule.</p>
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<td class="itemcode"><a name="Create"></a><code>constructor <b>Create</b>(AParentScene: <a href="CastleSceneCore.TCastleSceneCore.html">TCastleSceneCore</a>);</code></td>
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<td class="itemcode"><a name="Top"></a><code>function <b>Top</b>: <a href="X3DNodes.TAbstractBindableNode.html">TAbstractBindableNode</a>;</code></td>
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<p>
Returns top item on this stack, or <code>Nil</code> if not present.</p>
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<td class="itemcode"><a name="PushIfEmpty"></a><code>procedure <b>PushIfEmpty</b>(Node: <a href="X3DNodes.TAbstractBindableNode.html">TAbstractBindableNode</a>; SendEvents: boolean);</code></td>
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<p>
Add new node to the top, but only if stack is currently empty. If SendEvents, then isBound = true and bindTime events will be send to newly bound node.</p>
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<td class="itemcode"><a name="CheckForDeletedNodes"></a><code>procedure <b>CheckForDeletedNodes</b>(const RootNode: <a href="X3DNodes.TX3DRootNode.html">TX3DRootNode</a>; const SendEvents: boolean);</code></td>
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<p>
Use when you suspect that some nodes on the stack are no longer present in VRML/X3D graph RootNode (they were deleted). In this case, they have to be removed from stack.
<p>If this will change the currently bound node, then the new bound node will receive isBound = true and bindTime events (the old node will not receive any <a class="normal" href="CastleSceneCore.TX3DBindableStack.html#Set_Bind">set_bind</a> = false or isBound = false events, since it may be destroyed by now).</p>
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<td class="itemcode"><a name="Set_Bind"></a><code>procedure <b>Set_Bind</b>(Node: <a href="X3DNodes.TAbstractBindableNode.html">TAbstractBindableNode</a>; const Value: boolean); override;</code></td>
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<p>
Handle <code>set_bind</code> event send to given Node. This always generates appropriate events.</p>
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<h3 class="detail">Properties</h3>
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<td class="itemcode"><a name="ParentScene"></a><code>property <b>ParentScene</b>: <a href="CastleSceneCore.TCastleSceneCore.html">TCastleSceneCore</a> read FParentScene;</code></td>
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<td class="itemcode"><a name="OnBoundChanged"></a><code>property <b>OnBoundChanged</b>: <a href="CastleSceneCore.html#TSceneNotification">TSceneNotification</a>
read FOnBoundChanged write FOnBoundChanged;</code></td>
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<p>
Notification when the currently bound node, that is <a class="normal" href="CastleSceneCore.TX3DBindableStack.html#Top">Top</a>, changed. This also includes notification when <a class="normal" href="CastleSceneCore.TX3DBindableStack.html#Top">Top</a> changed to (or from) <code>Nil</code>, that is when no node becomes bound or when some node is initially bound.</p>
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