OpenWalnut
1.4.0
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00001 //--------------------------------------------------------------------------- 00002 // 00003 // Project: OpenWalnut ( http://www.openwalnut.org ) 00004 // 00005 // Copyright 2009 OpenWalnut Community, BSV@Uni-Leipzig and CNCF@MPI-CBS 00006 // For more information see http://www.openwalnut.org/copying 00007 // 00008 // This file is part of OpenWalnut. 00009 // 00010 // OpenWalnut is free software: you can redistribute it and/or modify 00011 // it under the terms of the GNU Lesser General Public License as published by 00012 // the Free Software Foundation, either version 3 of the License, or 00013 // (at your option) any later version. 00014 // 00015 // OpenWalnut is distributed in the hope that it will be useful, 00016 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00018 // GNU Lesser General Public License for more details. 00019 // 00020 // You should have received a copy of the GNU Lesser General Public License 00021 // along with OpenWalnut. If not, see <http://www.gnu.org/licenses/>. 00022 // 00023 //--------------------------------------------------------------------------- 00024 00025 #include "WGENodeMaskCallback.h" 00026 00027 WGENodeMaskCallback::WGENodeMaskCallback( boost::shared_ptr< WBoolFlag > flag ): 00028 osg::NodeCallback(), 00029 m_flag( flag ) 00030 { 00031 // get change signal 00032 m_connection = m_flag->getValueChangeCondition()->subscribeSignal( 00033 boost::bind( &WGENodeMaskCallback::activate, this ) 00034 ); 00035 } 00036 00037 WGENodeMaskCallback::~WGENodeMaskCallback() 00038 { 00039 // cleanup 00040 m_connection.disconnect(); 00041 } 00042 00043 void WGENodeMaskCallback::activate() 00044 { 00045 if( m_flag->get() ) // only handle activation here 00046 { 00047 m_reactivateSignal(); 00048 } 00049 } 00050 00051 void WGENodeMaskCallback::operator()( osg::Node* node, osg::NodeVisitor* nv ) 00052 { 00053 // Deactivate the node 00054 if( !m_flag->get() ) // only handle deactivation here 00055 { 00056 node->setNodeMask( 0x0 ); 00057 00058 // NOTE: this also deactivates the callback. So reactivating the node is done in a separate method 00059 // connect the flag's callback to the signal, only this way, we can ensure the reactivation of a node without saving a pointer to it. 00060 m_reactivateConnection = m_reactivateSignal.connect( boost::bind( &osg::Node::setNodeMask, node, 0xFFFFFFFF ) ); 00061 } 00062 00063 traverse( node, nv ); 00064 } 00065