63 lines
1.9 KiB
Plaintext
63 lines
1.9 KiB
Plaintext
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/* -*-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_PICKER_H
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#define OSGEARTH_PICKER_H 1
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#include <osgEarth/Common>
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#include <osgEarth/ObjectIndex>
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#include <osgGA/GUIEventHandler>
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namespace osgEarth
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{
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/**
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* Base class for an object picker. Header only (no export)
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*/
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class Picker : public osgGA::GUIEventHandler
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{
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public:
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struct Callback : public osg::Referenced
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{
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// Called when an ID is hit
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virtual void onHit(ObjectID id) { }
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// Called when a query results in nothing
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virtual void onMiss() { }
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// Called to ask whether to perform a query based on events
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virtual bool accept(const osgGA::GUIEventAdapter& ea, const osgGA::GUIActionAdapter& aa) { return false; }
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};
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public:
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/**
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* Initiate a pick. The picker will invoke the callback when the pick is complete.
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* Returns true is the pick was successfully queued.
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*/
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virtual bool pick(osg::View* view, float mouseX, float mouseY, Callback* callback) = 0;
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protected:
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virtual ~Picker() { }
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};
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} // namespace osgEarth
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#endif // OSGEARTH_PICKER
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