Qt+OSG编译成功后，例子运行时弹出出错：Cannot make QOpenGLContext current in a different thread.

BenBenDeYiZhi 2017-12-20 11:13:03

Qt5.4.2+OSG3.2+vs2010+win10_X64，编译成功后，也进行了环境变量配置，能做的什么都做了，然后建了一个QtApplication，在网上复制了一段代码，出现错误，代码和错误如下：
代码：
#include <QtWidgets/QApplication>

#include <osgViewer/Viewer>
#include <osgGA/TrackballManipulator>
#include <osgQt/GraphicsWindowQt>

#include <osg/ShapeDrawable>
#include <osg/MatrixTransform>
#include <osgManipulator/TabBoxDragger>
#include <osgGA/StateSetManipulator>
#include <osgViewer/ViewerEventHandlers>
#include <osgDB/ReadFile>

int main( int argc, char** argv )
{
QApplication app(argc, argv);
osgQt::initQtWindowingSystem();

osg::Group* sceneroot = new osg::Group;

sceneroot->addChild(osgDB::readNodeFile("cow.osg"));
osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer;
viewer->addEventHandler( new osgGA::StateSetManipulator(viewer->getCamera()->getOrCreateStateSet()) );
viewer->addEventHandler(new osgViewer::StatsHandler);

viewer->setSceneData( sceneroot );
viewer->setCameraManipulator( new osgGA::TrackballManipulator );
osgQt::setViewer( viewer.get() );

osgQt::GLWidget* glw = new osgQt::GLWidget;
osgQt::GraphicsWindowQt* graphicswin = new osgQt::GraphicsWindowQt(glw);

viewer->getCamera()->setViewport( new osg::Viewport(0, 0, glw->width(), glw->height() ) );
viewer->getCamera()->setGraphicsContext( graphicswin );

glw->show();

return app.exec();
}

错误：
1>C:\OSG\include\osgQt/GraphicsWindowQt(24): fatal error C1083: 无法打开包括文件:“QGLWidget”: No such file or directory

现在上述错误解决了，可以编译通过，但是运行时弹出错误：Cannot make QOpenGLContext current in a different thread.
具体错误看图。