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- /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
- *
- * This library is open source and may be redistributed and/or modified under
- * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
- * (at your option) any later version. The full license is in LICENSE file
- * included with this distribution, and on the openscenegraph.org website.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * OpenSceneGraph Public License for more details.
- */
- // The following symbol has a underscore suffix for compatibility.
- #ifndef OSGGA_EXPORT_
- #define OSGGA_EXPORT_ 1
- #include<osg/Config>
- #if defined(_MSC_VER) && defined(OSG_DISABLE_MSVC_WARNINGS)
- #pragma warning( disable : 4244 )
- #pragma warning( disable : 4251 )
- #pragma warning( disable : 4267 )
- #pragma warning( disable : 4275 )
- #pragma warning( disable : 4290 )
- #pragma warning( disable : 4786 )
- #pragma warning( disable : 4305 )
- #pragma warning( disable : 4996 )
- #endif
- #if defined(_MSC_VER) || defined(__CYGWIN__) || defined(__MINGW32__) || defined( __BCPLUSPLUS__) || defined( __MWERKS__)
- # if defined( OSG_LIBRARY_STATIC )
- # define OSGGA_EXPORT
- # elif defined( OSGGA_LIBRARY )
- # define OSGGA_EXPORT __declspec(dllexport)
- # else
- # define OSGGA_EXPORT __declspec(dllimport)
- #endif
- #else
- #define OSGGA_EXPORT
- #endif
- #endif
- /**
- \namespace osgGA
- The 'GA' in osgGA stands for 'GUI Abstraction'; the osgGA namespace provides facilities to
- help developers write the glue to allow the osg to work with varying window systems.
- As a cross-platform, window system-agnostic class library, the OpenSceneGraph
- has no direct ties to any given windowing environment. Viewers, however, must at
- some level interact with a window system - where Window system may refer to a windowing
- API, e.g. GLUT, Qt, FLTK, MFC, ...
- There is much commonality in the implementation of Viewers for varying windowing
- environments. E.g. most Viewers will update a Camera position in response to a mouse
- event, and may request that a timer be started as a result of a model being 'spun'.
- The purpose of the osgGA namespace is to centralise the common areas of this
- functionality. The viewer writer needs then only write a GUIEventAdapter, a
- GUIActionAdapter, and assemble a collection of GUIEventHandlers
- as appropriate for the viewer.
- Events from the windowing environment are adpated, and then fed into the GUIEventHandlers.
- The GUIEventHandlers analyse and take action, and make requests of the windowing
- environment via the GUIActionAdapter. The viewer writer should then honour these
- requests, translating them into calls to the windowing API.
- */
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