2002-05-09 18:31:03 +08:00
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//C++ header - Open Scene Graph - Copyright (C) 1998-2001 Robert Osfield
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//Distributed under the terms of the GNU Library General Public License (LGPL)
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//as published by the Free Software Foundation.
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// The following symbol has a underscore suffix for compatibility.
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#ifndef OSGGA_EXPORT_
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#define OSGGA_EXPORT_ 1
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#if defined(WIN32) && !(defined(__CYGWIN__) || defined(__MINGW32__))
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2002-05-29 00:11:49 +08:00
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#pragma warning( disable : 4244 )
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#pragma warning( disable : 4251 )
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#pragma warning( disable : 4267 )
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#pragma warning( disable : 4275 )
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#pragma warning( disable : 4290 )
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#pragma warning( disable : 4786 )
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2002-05-09 18:31:03 +08:00
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#endif
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#if defined(_MSC_VER) || defined(__CYGWIN__) || defined(__MINGW32__) || defined( __BCPLUSPLUS__) || defined( __MWERKS__)
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# ifdef OSGGA_LIBRARY
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# define OSGGA_EXPORT __declspec(dllexport)
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# else
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# define OSGGA_EXPORT __declspec(dllimport)
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#endif /* OSGUTIL_LIBRARY */
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#else
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#define OSGGA_EXPORT
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#endif
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#endif
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/**
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\namespace osgGA
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2002-05-22 16:50:05 +08:00
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The 'GA' in osgGA stands for 'GUI Abstraction'; the osgGA namespace provides facilities to
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help developers write the glue to allow the osg to work with varying window systems.
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2002-05-09 18:31:03 +08:00
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2002-05-22 16:50:05 +08:00
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As a cross-platform, window system-agnostic class library, the OpenSceneGraph
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has no direct ties to any given windowing environment. Viewers, however, must at
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2002-05-09 18:31:03 +08:00
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some level interact with a window system - where Window system may refer to a windowing
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API, e.g. GLUT, Qt, FLTK, MFC, ...
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There is much commonality in the implementation of Viewers for varying windowing
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environments. E.g. most Viewers will update a Camera position in response to a mouse
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event, and may request that a timer be started as a result of a model being 'spun'.
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The purpose of the osgGA namespace is to centralise the common areas of this
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2002-05-22 16:50:05 +08:00
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functionality. The viewer writer needs then only write a GUIEventAdapter, a
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GUIActionAdapter, and assemble a collection of GUIEventHandlers
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2002-05-09 18:31:03 +08:00
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as appropriate for the viewer.
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Events from the windowing environment are adpated, and then fed into the GUIEventHandlers.
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The GUIEventHandlers analyse and take action, and make requests of the windowing
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2002-05-22 16:50:05 +08:00
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environemnt via the GUIActionAdapter. The viewer writer should then honour these
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requests, translating them into calls to the windowing API.
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2002-05-09 18:31:03 +08:00
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*/
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