57 lines
1.9 KiB
Plaintext
57 lines
1.9 KiB
Plaintext
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/* -*-c++-*- */
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/* osgEarth - Geospatial SDK for OpenSceneGraph
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* Copyright 2008-2014 Pelican Mapping
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* http://osgearth.org
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*
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* osgEarth is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#pragma once
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#include <osgEarth/Export>
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#include <osgEarth/RefinePolicy>
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namespace osgEarth
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{
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/**
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* Pure interface for an object that can load or unload data.
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*/
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class /*interface*/ LoadableNode
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{
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public:
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//! Instruct the object to load its payload
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virtual void load() = 0;
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//! Instruct the object to discard its payload
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virtual void unload() = 0;
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//! How to behave when higher resolution data is loaded
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virtual RefinePolicy getRefinePolicy() const = 0;
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//! Whether a call to load() completed (successfully or not)
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virtual bool isLoadComplete() const = 0;
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//! Whether the node is the highest resolution node in the scene graph
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virtual bool isHighestResolution() const = 0;
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//! Whether to automatically discard the payload when the
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//! system determines that this node is not currently in use
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virtual bool getAutoUnload() const = 0;
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//! Whether to automatically discard the payload when the
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//! system determines that this node is not currently in use
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virtual void setAutoUnload(bool value) = 0;
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};
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}
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