6f356aeb97
with new pdf plugin and updated vnc plugin that now support these front ends. Updated osgpdf and osgvnc examples to new these new interfaces.
117 lines
2.9 KiB
C++
117 lines
2.9 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library 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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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSGWIDGET_PDFREADER
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#define OSGWIDGET_PDFREADER
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#include <osg/Image>
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#include <osg/Geode>
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#include <osgWidget/Export>
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namespace osgWidget {
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/** Hints structure that can be passed to PdfReader and VncClient classes to help guide them on what geometry to build.*/
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struct GeometryHints
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{
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enum AspectRatioPolicy
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{
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RESIZE_HEIGHT_TO_MAINTAINCE_ASPECT_RATIO,
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RESIZE_WIDTH_TO_MAINTAINCE_ASPECT_RATIO,
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IGNORE_DOCUMENT_ASPECT_RATIO,
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};
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GeometryHints():
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position(0.0f,0.0f,0.0f),
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widthVec(1.0f,0.0f,0.0f),
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heightVec(0.0f,1.0f,0.0f),
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aspectRatioPolicy(RESIZE_HEIGHT_TO_MAINTAINCE_ASPECT_RATIO) {}
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GeometryHints(const osg::Vec3& pos,
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const osg::Vec3& wVec,
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const osg::Vec3& hVec,
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AspectRatioPolicy asp=RESIZE_HEIGHT_TO_MAINTAINCE_ASPECT_RATIO):
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position(pos),
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widthVec(wVec),
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heightVec(hVec),
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aspectRatioPolicy(asp) {}
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osg::Vec3 position;
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osg::Vec3 widthVec;
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osg::Vec3 heightVec;
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AspectRatioPolicy aspectRatioPolicy;
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};
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/** Pure virtual base class for interfacing with implementation of PDF reader.*/
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class PdfImage : public osg::Image
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{
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public:
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PdfImage():_pageNum(0) {}
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int getPageNum() const { return _pageNum; }
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virtual int getNumOfPages() = 0;
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virtual bool page(int pageNum) = 0;
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bool previous()
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{
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return page(_pageNum-1);
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}
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bool next()
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{
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return page(_pageNum+1);
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}
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protected:
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virtual ~PdfImage() {}
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int _pageNum;
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};
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/** Convinience class that provides a interactive quad that can be placed directly in the scene.*/
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class OSGWIDGET_EXPORT PdfReader : public osg::Geode
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{
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public:
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PdfReader() {}
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PdfReader(const std::string& filename, GeometryHints hints = GeometryHints());
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bool assign(PdfImage* pdfImage, GeometryHints hints = GeometryHints());
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bool open(const std::string& filename, GeometryHints hints = GeometryHints());
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bool page(int pageNum);
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bool previous();
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bool next();
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protected:
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osg::ref_ptr<PdfImage> _pdfImage;
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};
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}
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#endif
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