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From Morne Pistorius, "Attached is a modified version of the QOSGWidget example that shows

Browse Source 
the workaround we discussed for adding/removing views in a composite
viewer at runtime.  A dummy view is added to the viewer to always keep
it live.

Also, I added a #define to the Qt event relay methods to not override
them on a Windows system.  This fixes the bug where duplicate events
are being sent and making it impossible to throw the trackball."
This commit is contained in:
Robert Osfield
2009-02-05 12:21:50 +00:00
parent a2c88dd39e
commit 42cc008c06
1 changed files with 93 additions and 14 deletions
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107
examples/osgviewerQT/QOSGWidget.cpp
View File

@@ -96,6 +96,10 @@ class QOSGWidget : public QWidget
void init();
void createContext();
// The GraphincsWindowWin32 implementation already takes care of message handling.
// We don't want to relay these on Windows, it will just cause duplicate messages
// with further problems downstream (i.e. not being able to throw the trackball
#ifndef WIN32
virtual void mouseDoubleClickEvent ( QMouseEvent * event );
virtual void closeEvent( QCloseEvent * event );
virtual void destroyEvent( bool destroyWindow = true, bool destroySubWindows = true);
@@ -105,7 +109,7 @@ class QOSGWidget : public QWidget
virtual void mousePressEvent( QMouseEvent* event );
virtual void mouseReleaseEvent( QMouseEvent* event );
virtual void mouseMoveEvent( QMouseEvent* event );
#endif
osg::ref_ptr<osgViewer::GraphicsWindow> _gw;
bool _overrideTraits;
};
@@ -188,6 +192,8 @@ void QOSGWidget::createContext()
}
}
#ifndef WIN32
void QOSGWidget::destroyEvent(bool destroyWindow, bool destroySubWindows)
{
_gw->getEventQueue()->closeWindow();
@@ -275,7 +281,7 @@ void QOSGWidget::mouseMoveEvent( QMouseEvent* event )
{
_gw->getEventQueue()->mouseMotion(event->x(), event->y());
}
#endif
@@ -307,30 +313,99 @@ class ViewerQOSG : public osgViewer::Viewer, public QOSGWidget
};
class CompositeViewerQOSG : public osgViewer::CompositeViewer, public QOSGWidget
{
public:
CompositeViewerQOSG(QWidget * parent = 0, const char * name = 0, WindowFlags f = 0):
QOSGWidget( parent, name, f )
CompositeViewerQOSG(QWidget * parent = 0, const char * name = 0, WindowFlags f = 0)
: QOSGWidget( parent, name, f )
{
setThreadingModel(osgViewer::CompositeViewer::SingleThreaded);
setThreadingModel(osgViewer::CompositeViewer::SingleThreaded);
connect(&_timer, SIGNAL(timeout()), this, SLOT(repaint()));
connect(&_timer, SIGNAL(timeout()), this, SLOT(repaint()));
// The app would hang on exit when using start(1). Behaves better with 10
// like the non-composite viewer. Was this just a typo?
_timer.start(10);
// The composite viewer needs at least one view to work
// Create a dummy view with a zero sized viewport and no
// scene to keep the viewer alive.
osgViewer::View * pView = new osgViewer::View;
pView->getCamera()->setGraphicsContext( getGraphicsWindow() );
pView->getCamera()->setViewport( 0, 0, 0, 0 );
addView( pView );
// Clear the viewer of removed views
getGraphicsWindow()->setClearMask( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
getGraphicsWindow()->setClearColor( osg::Vec4( 0.08, 0.08, 0.5, 1.0 ) );
// The app would hang on exit when using start(1). Behaves better with 10
// like the non-composite viewer. Was this just a typo?
_timer.start(10);
}
virtual void paintEvent( QPaintEvent * event ) { frame(); }
protected:
void keyPressEvent( QKeyEvent* event )
{
if ( event->text() == "a" )
{
AddView( _scene );
}
if ( event->text() == "r" )
{
RemoveView();
}
QOSGWidget::keyPressEvent( event );
}
void AddView( osg::Node * scene );
void RemoveView();
void Tile();
osg::ref_ptr< osg::Node > _scene;
protected:
QTimer _timer;
};
void CompositeViewerQOSG::Tile()
{
int n = getNumViews() - 1; // -1 to account for dummy view
for ( int i = 0; i < n; ++i )
{
osgViewer::View * view = getView(i+1); // +1 to account for dummy view
view->getCamera()->setViewport( new osg::Viewport( 0, i*height()/n , width(), height()/n ) );
view->getCamera()->setProjectionMatrixAsPerspective( 30.0f, double( width() ) / double( height()/n ), 1.0f, 10000.0f );
}
}
void CompositeViewerQOSG::AddView( osg::Node * scene )
{
osgViewer::View* view = new osgViewer::View;
addView(view);
view->setSceneData( scene );
view->setCameraManipulator(new osgGA::TrackballManipulator);
// add the state manipulator
osg::ref_ptr<osgGA::StateSetManipulator> statesetManipulator = new osgGA::StateSetManipulator;
statesetManipulator->setStateSet(view->getCamera()->getOrCreateStateSet());
view->getCamera()->setGraphicsContext( getGraphicsWindow() );
view->getCamera()->setClearColor( osg::Vec4( 0.08, 0.08, 0.5, 1.0 ) );
Tile();
}
void CompositeViewerQOSG::RemoveView()
{
if ( getNumViews() > 1 )
{
removeView( getView( getNumViews() - 1 ) );
}
Tile();
}
#if USE_QT4
@@ -410,7 +485,7 @@ int mainQOSGWidget(QApplication& a, osg::ArgumentParser& arguments)
{
osg::ref_ptr<CompositeViewerQOSG> viewerWindow(new CompositeViewerQOSG);
viewerWindow->setGeometry(0,0,640,480);
viewerWindow->setGeometry(50,50,640,480);
// Open the ViewerQOSG window at 30/30 instead of 0/0. In some instances,
// the window may otherwise lack any window decoration.
// viewerWindow->setGeometry(30,30,640,480);
@@ -424,6 +499,7 @@ int mainQOSGWidget(QApplication& a, osg::ArgumentParser& arguments)
view1->getCamera()->setProjectionMatrixAsPerspective(30.0f, static_cast<double>(width)/static_cast<double>(height/2), 1.0, 1000.0);
view1->getCamera()->setViewport(new osg::Viewport(0,0,width,height/2));
view1->setSceneData(loadedModel.get());
view1->getCamera()->setClearColor( osg::Vec4( 0.08, 0.08, 0.5, 1.0 ) );
setupManipulatorAndHandler(*view1, arguments);
@@ -436,12 +512,15 @@ int mainQOSGWidget(QApplication& a, osg::ArgumentParser& arguments)
view2->getCamera()->setProjectionMatrixAsPerspective(30.0f, static_cast<double>(width)/static_cast<double>(height/2), 1.0, 1000.0);
view2->getCamera()->setViewport(new osg::Viewport(0,height/2,width,height/2));
view2->setSceneData(loadedModel.get());
view2->getCamera()->setClearColor( osg::Vec4( 0.08, 0.08, 0.5, 1.0 ) );
setupManipulatorAndHandler(*view2, arguments);
viewerWindow->addView(view2);
}
viewerWindow->_scene = loadedModel.get();
viewerWindow->Tile();
viewerWindow->show();
a.connect( &a, SIGNAL(lastWindowClosed()), &a, SLOT(quit()) );