85 lines
3.0 KiB
C++
85 lines
3.0 KiB
C++
/* -*-c++-*- */
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/* osgEarth - Geospatial SDK for OpenSceneGraph
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* Copyright 2020 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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#ifndef OSGEARTH_MAP_CALLBACK_H
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#define OSGEARTH_MAP_CALLBACK_H 1
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#include <osgEarth/Common>
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#include <osg/ref_ptr>
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#include <list>
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namespace osgEarth
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{
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class Layer;
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struct MapModelChange;
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/**
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* Callback that the Map object uses to notify listeners of map data model changes.
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*/
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struct OSGEARTH_EXPORT MapCallback : public osg::Referenced
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{
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//! Invoked when a batch operation begins.
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virtual void onBeginUpdate() { }
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//! Invoked when a batch operation ends.
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virtual void onEndUpdate() { }
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//! Invoked whenever a layer is added, removed, or moved from a Map.
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//! The default implementation in turn calls onLayerAdded, onLayerRemoved,
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//! or onLayerMoved, respectively.
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virtual void onMapModelChanged(const MapModelChange& change);
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//! Invoked when a layer is added to a Map.
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virtual void onLayerAdded(Layer* layer, unsigned index) { }
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//! Invoked when a layer is removed from a Map.
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virtual void onLayerRemoved(Layer* layer, unsigned index) { }
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//! Invoked when a layer is re-ordered within a Map.
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virtual void onLayerMoved(Layer* layer, unsigned oldIndex, unsigned newIndex) { }
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//! Invoked when a layer is opened (calls onLayerEnabled for back compat)
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virtual void onLayerOpened(Layer* layer) { onLayerEnabled(layer); }
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//! Invoked when a layer is closed (calls onLayerDisabled for back compat)
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virtual void onLayerClosed(Layer* layer) { onLayerDisabled(layer); }
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public: // backwards compatibility only.
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virtual void onLayerEnabled(Layer* layer) { }
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virtual void onLayerDisabled(Layer* layer) { }
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public:
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/** dtor */
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virtual ~MapCallback() { }
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/**
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* Invokes a callback method for all layers in the specified Map.
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* This is useful if you create a callback for a Map that already has
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* existing Layers in it and you want to "simulate" adding/removing them all.
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*/
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void invokeOnLayerAdded(const class Map*);
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void invokeOnLayerRemoved(const class Map*);
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};
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typedef std::list< osg::ref_ptr<MapCallback> > MapCallbackList;
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}
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#endif // OSGEARTH_MAP_CALLBACK_H
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