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98 lines
2.8 KiB
98 lines
2.8 KiB
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield |
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* |
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* This library is open source and may be redistributed and/or modified under |
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or |
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* (at your option) any later version. The full license is in LICENSE file |
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* included with this distribution, and on the openscenegraph.org website. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* OpenSceneGraph Public License for more details. |
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*/ |
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#ifndef OSG_NODECALLBACK |
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#define OSG_NODECALLBACK 1 |
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#include <osg/Object> |
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#include <osg/ref_ptr> |
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namespace osg { |
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class Node; |
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class NodeVisitor; |
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class OSG_EXPORT NodeCallback : public virtual Object { |
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public : |
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NodeCallback(){} |
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NodeCallback(const NodeCallback& nc,const CopyOp&): |
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_nestedCallback(nc._nestedCallback) {} |
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META_Object(osg,NodeCallback); |
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/** Callback method called by the NodeVisitor when visiting a node.*/ |
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virtual void operator()(Node* node, NodeVisitor* nv) |
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{ |
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// note, callback is responsible for scenegraph traversal so |
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// they must call traverse(node,nv) to ensure that the |
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// scene graph subtree (and associated callbacks) are traversed. |
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traverse(node,nv); |
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} |
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/** Call any nested callbacks and then traverse the scene graph. */ |
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void traverse(Node* node,NodeVisitor* nv); |
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void setNestedCallback(NodeCallback* nc) { _nestedCallback = nc; } |
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NodeCallback* getNestedCallback() { return _nestedCallback.get(); } |
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const NodeCallback* getNestedCallback() const { return _nestedCallback.get(); } |
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inline void addNestedCallback(NodeCallback* nc) |
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{ |
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if (nc) |
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{ |
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if (_nestedCallback.valid()) |
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{ |
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nc->addNestedCallback(_nestedCallback.get()); |
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_nestedCallback = nc; |
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} |
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else |
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{ |
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_nestedCallback = nc; |
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} |
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} |
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} |
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inline void removeNestedCallback(NodeCallback* nc) |
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{ |
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if (nc) |
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{ |
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if (_nestedCallback==nc) |
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{ |
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_nestedCallback = _nestedCallback->getNestedCallback(); |
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} |
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else if (_nestedCallback.valid()) |
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{ |
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_nestedCallback->removeNestedCallback(nc); |
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} |
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} |
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} |
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public: |
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ref_ptr<NodeCallback> _nestedCallback; |
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protected: |
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virtual ~NodeCallback() {} |
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}; |
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} // namespace |
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#endif |
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