Hi,
I am trying to integrate an osg viewer into a Qt user interface. To do this I
am using the osg viewer widget from the OpenSceneGraph 3.0 Cookbook. If I set
the widget to fullscreen with the Qt method showFullScreen(). If I do this I
have a gray border around my viewport. To eliminate the border I try to set the
margin of the layout which includes the osgviewer to 0. But if I do this the Qt
widget with viewer is not shown anymore. If I set the margin value to 1 then it
works but I have again a small gray border.
I know that this is working with OpenSG. Is there maybe a problem with osg??
Does someone has a solution for this problem??
Here is my code (Sorry I don'T know why the tabs are shown like this):
viewerwidget.h
Code:
#ifndef VIEWERWIDGET_H
#define VIEWERWIDGET_H
// C++ includes
#include <iostream>
// Qt includes
#include <QtCore/QtCore>
#include <QtGui/QtGui>
// OSG includes
#include <osgDB/ReadFile>
#include <osgGA/TrackballManipulator>
#include <osgViewer/ViewerEventHandlers>
#include <osgViewer/Viewer>
#include <osgQt/GraphicsWindowQt>
class ViewerWidget : public QWidget
{
public:
ViewerWidget( QWidget *parent = 0, Qt::WFlags flags = 0 )
: QWidget(parent, flags)
{
osg::Camera* camera = createCamera( 0, 0, 640, 480 );
osg::Node* scene = osgDB::readNodeFile("cow.osg");
m_viewer.setCamera( camera );
m_viewer.setSceneData( scene );
m_viewer.addEventHandler( new osgViewer::StatsHandler );
m_viewer.setCameraManipulator( new osgGA::TrackballManipulator
);
// Use single thread here to avoid known issues under Linux
m_viewer.setThreadingModel( osgViewer::Viewer::SingleThreaded );
osgQt::GraphicsWindowQt* gw =
dynamic_cast<osgQt::GraphicsWindowQt*>( camera->getGraphicsContext() );
if ( gw )
{
QVBoxLayout* layout = new QVBoxLayout;
///////////////////////////////////////
layout->setMargin(0);
///////////////////////////////////////
layout->addWidget( gw->getGLWidget() );
setLayout( layout );
}
connect( &m_timer, SIGNAL(timeout()), this, SLOT(update()) );
m_timer.start( 40 );
}
~ViewerWidget() {}
osg::Camera* createCamera( int x, int y, int w, int h )
{
osg::DisplaySettings* ds =
osg::DisplaySettings::instance().get();
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new
osg::GraphicsContext::Traits;
traits->windowDecoration = false;
traits->x = x;
traits->y = y;
traits->width = w;
traits->height = h;
traits->doubleBuffer = true;
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext( new
osgQt::GraphicsWindowQt(traits.get()) );
camera->setClearColor( osg::Vec4(0.2, 0.2, 0.6, 1.0) );
camera->setViewport( new osg::Viewport( 0, 0, traits->width,
traits->height) );
camera->setProjectionMatrixAsPerspective( 30.0f,
static_cast<double>(traits->width)/static_cast<double>(traits->height), 1.0f,
10000.0f );
return camera.release();
}
protected:
virtual void paintEvent( QPaintEvent* event ) { m_viewer.frame(); }
osgViewer::Viewer m_viewer;
QTimer m_timer;
};
#endif // VIEWERWIDGET_H
main.cpp
Code:
#include <QtGui/QApplication>
#include "viewerwidget.h"
int main(int argc, char *argv[])
{
QApplication app( argc, argv );
ViewerWidget* widget = new ViewerWidget(0,Qt::WindowStaysOnTopHint |
Qt::SplashScreen);
widget->setGeometry( 0, 0, 800, 600 );
widget->showFullScreen();
widget->show();
return app.exec();
}
Thank you!
Cheers,
Markus
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=47603#47603
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