Hi Robert,
I first posted about these problems in the Test 2.8 thread. I still
see two problems in the osgviewerQt example and managed to reproduce
both in the attached modified file.
1. Unable to spin/throw a model using QOSGWidget as a viewer.
2. viewer->addView doesn't work if the composite viewer is empty and
trying to add a new view at runtime.
These problems can be reproduced with the following command line (and
the above modified file):
osgviewerQt cessna.osg --QOSGWidget --CompositeViewer
Apart from this issue, 2.8 works fine in my application.
Thanks for all the effort you put into OSG, it really is an excellent library!
Cheers,
Morne
/* OpenSceneGraph example, osganimate.
*
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#if USE_QT4
#include <QtCore/QString>
#include <QtCore/QTimer>
#include <QtGui/QKeyEvent>
#include <QtGui/QApplication>
#include <QtGui/QtGui>
#include <QtGui/QWidget>
using Qt::WindowFlags;
#else
class QWidget;
#include <qtimer.h>
#include <qgl.h>
#include <qapplication.h>
#define WindowFlags WFlags
#endif
#include <osgViewer/Viewer>
#include <osgViewer/CompositeViewer>
#include <osgViewer/ViewerEventHandlers>
#include <osgViewer/GraphicsWindow>
#include <osgViewer/ViewerEventHandlers>
#if defined(WIN32) && !defined(__CYGWIN__)
#include <osgViewer/api/Win32/GraphicsWindowWin32>
typedef HWND WindowHandle;
typedef osgViewer::GraphicsWindowWin32::WindowData WindowData;
#elif defined(__APPLE__) // Assume using Carbon on Mac.
#include <osgViewer/api/Carbon/GraphicsWindowCarbon>
typedef WindowRef WindowHandle;
typedef osgViewer::GraphicsWindowCarbon::WindowData WindowData;
#else // all other unix
#include <osgViewer/api/X11/GraphicsWindowX11>
typedef Window WindowHandle;
typedef osgViewer::GraphicsWindowX11::WindowData WindowData;
#endif
#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
#include <osgGA/DriveManipulator>
#include <osgGA/KeySwitchMatrixManipulator>
#include <osgGA/StateSetManipulator>
#include <osgGA/AnimationPathManipulator>
#include <osgGA/TerrainManipulator>
#include <osgDB/ReadFile>
#include <iostream>
#include <sstream>
class QOSGWidget : public QWidget
{
public:
QOSGWidget( QWidget * parent = 0, const char * name = 0, WindowFlags f
= 0, bool overrideTraits = false);
virtual ~QOSGWidget() {}
osgViewer::GraphicsWindow* getGraphicsWindow() { return _gw.get(); }
const osgViewer::GraphicsWindow* getGraphicsWindow() const { return
_gw.get(); }
protected:
void init();
void createContext();
virtual void mouseDoubleClickEvent ( QMouseEvent * event );
virtual void closeEvent( QCloseEvent * event );
virtual void destroyEvent( bool destroyWindow = true, bool
destroySubWindows = true);
virtual void resizeEvent( QResizeEvent * event );
virtual void keyPressEvent( QKeyEvent* event );
virtual void keyReleaseEvent( QKeyEvent* event );
virtual void mousePressEvent( QMouseEvent* event );
virtual void mouseReleaseEvent( QMouseEvent* event );
virtual void mouseMoveEvent( QMouseEvent* event );
osg::ref_ptr<osgViewer::GraphicsWindow> _gw;
bool _overrideTraits;
};
QOSGWidget::QOSGWidget( QWidget * parent, const char * name, WindowFlags f,
bool overrideTraits):
#if USE_QT4
QWidget(parent, f), _overrideTraits (overrideTraits)
#else
QWidget(parent, name, f), _overrideTraits (overrideTraits)
#endif
{
createContext();
#if USE_QT4
setAttribute(Qt::WA_PaintOnScreen);
setAttribute(Qt::WA_NoSystemBackground);
setFocusPolicy(Qt::ClickFocus);
#else
setBackgroundMode(Qt::NoBackground);
#endif
}
void QOSGWidget::createContext()
{
osg::DisplaySettings* ds = osg::DisplaySettings::instance();
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new
osg::GraphicsContext::Traits;
traits->readDISPLAY();
if (traits->displayNum<0) traits->displayNum = 0;
traits->windowName = "osgViewerQt";
traits->screenNum = 0;
traits->x = x();
traits->y = y();
traits->width = width();
traits->height = height();
traits->alpha = ds->getMinimumNumAlphaBits();
traits->stencil = ds->getMinimumNumStencilBits();
traits->windowDecoration = false;
traits->doubleBuffer = true;
traits->sharedContext = 0;
traits->sampleBuffers = ds->getMultiSamples();
traits->samples = ds->getNumMultiSamples();
#if defined(__APPLE__)
// Extract a WindowPtr from the HIViewRef that QWidget::winId() returns.
// Without this change, the peer tries to call GetWindowPort on the
HIViewRef
// which returns 0 and we only render white.
traits->inheritedWindowData = new
WindowData(HIViewGetWindow((HIViewRef)winId()));
#else // all others
traits->inheritedWindowData = new WindowData(winId());
#endif
if (ds->getStereo())
{
switch(ds->getStereoMode())
{
case(osg::DisplaySettings::QUAD_BUFFER): traits->quadBufferStereo =
true; break;
case(osg::DisplaySettings::VERTICAL_INTERLACE):
case(osg::DisplaySettings::CHECKERBOARD):
case(osg::DisplaySettings::HORIZONTAL_INTERLACE): traits->stencil =
8; break;
default: break;
}
}
osg::ref_ptr<osg::GraphicsContext> gc =
osg::GraphicsContext::createGraphicsContext(traits.get());
_gw = dynamic_cast<osgViewer::GraphicsWindow*>(gc.get());
// get around dearanged traits on X11 (MTCompositeViewer only)
if (_overrideTraits)
{
traits->x = x();
traits->y = y();
traits->width = width();
traits->height = height();
}
}
void QOSGWidget::destroyEvent(bool destroyWindow, bool destroySubWindows)
{
_gw->getEventQueue()->closeWindow();
}
void QOSGWidget::closeEvent( QCloseEvent * event )
{
#ifndef USE_QT4
event->accept();
#endif
_gw->getEventQueue()->closeWindow();
}
void QOSGWidget::resizeEvent( QResizeEvent * event )
{
const QSize & size = event->size();
_gw->getEventQueue()->windowResize(0, 0, size.width(), size.height() );
_gw->resized(0, 0, size.width(), size.height());
}
void QOSGWidget::keyPressEvent( QKeyEvent* event )
{
#if USE_QT4
_gw->getEventQueue()->keyPress( (osgGA::GUIEventAdapter::KeySymbol)
*(event->text().toAscii().data() ) );
#else
_gw->getEventQueue()->keyPress( (osgGA::GUIEventAdapter::KeySymbol)
event->ascii() );
#endif
}
void QOSGWidget::keyReleaseEvent( QKeyEvent* event )
{
#if USE_QT4
int c = *event->text().toAscii().data();
#else
int c = event->ascii();
#endif
_gw->getEventQueue()->keyRelease( (osgGA::GUIEventAdapter::KeySymbol) (c) );
}
void QOSGWidget::mousePressEvent( QMouseEvent* event )
{
int button = 0;
switch(event->button())
{
case(Qt::LeftButton): button = 1; break;
case(Qt::MidButton): button = 2; break;
case(Qt::RightButton): button = 3; break;
case(Qt::NoButton): button = 0; break;
default: button = 0; break;
}
_gw->getEventQueue()->mouseButtonPress(event->x(), event->y(), button);
}
void QOSGWidget::mouseDoubleClickEvent ( QMouseEvent * event )
{
int button = 0;
switch(event->button())
{
case(Qt::LeftButton): button = 1; break;
case(Qt::MidButton): button = 2; break;
case(Qt::RightButton): button = 3; break;
case(Qt::NoButton): button = 0; break;
default: button = 0; break;
}
_gw->getEventQueue()->mouseDoubleButtonPress(event->x(), event->y(),
button);
}
void QOSGWidget::mouseReleaseEvent( QMouseEvent* event )
{
int button = 0;
switch(event->button())
{
case(Qt::LeftButton): button = 1; break;
case(Qt::MidButton): button = 2; break;
case(Qt::RightButton): button = 3; break;
case(Qt::NoButton): button = 0; break;
default: button = 0; break;
}
_gw->getEventQueue()->mouseButtonRelease(event->x(), event->y(), button);
}
void QOSGWidget::mouseMoveEvent( QMouseEvent* event )
{
_gw->getEventQueue()->mouseMotion(event->x(), event->y());
}
class ViewerQOSG : public osgViewer::Viewer, public QOSGWidget
{
public:
ViewerQOSG(QWidget * parent = 0, const char * name = 0, WindowFlags f =
0):
QOSGWidget( parent, name, f )
{
setThreadingModel(osgViewer::Viewer::SingleThreaded);
connect(&_timer, SIGNAL(timeout()), this, SLOT(update()));
_timer.start(10);
}
void updateCamera()
{
getCamera()->setViewport(new osg::Viewport(0,0,width(),height()));
getCamera()->setProjectionMatrixAsPerspective(30.0f,
static_cast<double>(width())/static_cast<double>(height()), 1.0f, 10000.0f);
getCamera()->setGraphicsContext(getGraphicsWindow());
}
virtual void paintEvent( QPaintEvent * event ) { frame(); }
protected:
QTimer _timer;
};
class CompositeViewerQOSG : public osgViewer::CompositeViewer, public QOSGWidget
{
public:
CompositeViewerQOSG(QWidget * parent = 0, const char * name = 0,
WindowFlags f = 0)
: QOSGWidget( parent, name, f )
{
setThreadingModel(osgViewer::CompositeViewer::SingleThreaded);
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);
}
virtual void paintEvent( QPaintEvent * event ) { frame(); }
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();
for ( int i = 0; i < n; ++i )
{
osgViewer::View * view = getView(i);
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() );
Tile();
}
void CompositeViewerQOSG::RemoveView()
{
if ( getNumViews() > 0 )
{
removeView( getView(0) );
}
Tile();
}
#if USE_QT4
// we use this wrapper for CompositeViewer ONLY because of the timer
// NOTE: this is a workaround because we're not using QT's moc precompiler here.
//
class QViewerTimer : public QWidget
{
public:
QViewerTimer (QWidget * parent = 0, WindowFlags f = 0):
QWidget (parent, f)
{
_viewer = new osgViewer::CompositeViewer ();
_viewer->setThreadingModel(osgViewer::CompositeViewer::DrawThreadPerContext);
connect(&_timer, SIGNAL(timeout()), this, SLOT(repaint()));
_timer.start(10);
}
~QViewerTimer ()
{
_timer.stop ();
}
virtual void paintEvent (QPaintEvent * event) { _viewer->frame(); }
osg::ref_ptr <osgViewer::CompositeViewer> _viewer;
QTimer _timer;
};
#endif
void setupManipulatorAndHandler(osgViewer::View & viewer, osg::ArgumentParser &
arguments)
{
// set up the camera manipulators.
{
osg::ref_ptr<osgGA::KeySwitchMatrixManipulator> keyswitchManipulator =
new osgGA::KeySwitchMatrixManipulator;
keyswitchManipulator->addMatrixManipulator( '1', "Trackball", new
osgGA::TrackballManipulator() );
keyswitchManipulator->addMatrixManipulator( '2', "Flight", new
osgGA::FlightManipulator() );
keyswitchManipulator->addMatrixManipulator( '3', "Drive", new
osgGA::DriveManipulator() );
keyswitchManipulator->addMatrixManipulator( '4', "Terrain", new
osgGA::TerrainManipulator() );
viewer.setCameraManipulator( keyswitchManipulator.get() );
}
// add the state manipulator
viewer.addEventHandler( new
osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
// add the thread model handler
viewer.addEventHandler(new osgViewer::ThreadingHandler);
// add the window size toggle handler
viewer.addEventHandler(new osgViewer::WindowSizeHandler);
// add the stats handler
viewer.addEventHandler(new osgViewer::StatsHandler);
// add the help handler
viewer.addEventHandler(new
osgViewer::HelpHandler(arguments.getApplicationUsage()));
}
int mainQOSGWidget(QApplication& a, osg::ArgumentParser& arguments)
{
// load the scene.
osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
if (!loadedModel)
{
std::cout << arguments[0] <<": No data loaded." << std::endl;
return 1;
}
std::cout<<"Using QOSGWidget - QWidget + osgViewer creating the graphics
context."<<std::endl;
if (arguments.read("--CompositeViewer"))
{
osg::ref_ptr<CompositeViewerQOSG> viewerWindow(new CompositeViewerQOSG);
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);
unsigned int width = viewerWindow->width();
unsigned int height = viewerWindow->height();
{
osgViewer::View* view1 = new osgViewer::View;
view1->getCamera()->setGraphicsContext(viewerWindow->getGraphicsWindow());
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());
setupManipulatorAndHandler(*view1, arguments);
viewerWindow->addView(view1);
}
{
osgViewer::View* view2 = new osgViewer::View;
view2->getCamera()->setGraphicsContext(viewerWindow->getGraphicsWindow());
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());
setupManipulatorAndHandler(*view2, arguments);
viewerWindow->addView(view2);
}
viewerWindow->_scene = loadedModel.get();
viewerWindow->Tile();
viewerWindow->show();
a.connect( &a, SIGNAL(lastWindowClosed()), &a, SLOT(quit()) );
return a.exec();
}
#if USE_QT4
else if (arguments.read("--MTCompositeViewer"))
{
std::cout <<" + using standard CompositeViewer with seperate contexts
(Multithreaded mode / EXPERIMENTAL !)" <<std::endl;
int nbCowsX = 3;
int nbCowsY = 2;
int size = 300;
unsigned int width = nbCowsX * size;
unsigned int height = nbCowsY * size;
QGridLayout *uiLayout = new QGridLayout ();
QWidget *wy = new QWidget ();
// the timer holds an instance of osgViewer::CompositeViewer
// NOTE: this is a workaround since we're not using QT's moc
precompiler here..
QViewerTimer *ctimer = new QViewerTimer ();
for (int x=0;x<nbCowsX; x++)
for (int y=0;y<nbCowsY; y++)
{
// embed the QOSGWidget into QGroupBox to demonstrate that we
// really use QT's Widgets
//
std::stringstream widgetname; widgetname << "View (" << x <<
"," << y << ")";
QGroupBox *w= new QGroupBox (QString (widgetname.str ().c_str
()), wy);
QGridLayout *tmpl = new QGridLayout ();
QOSGWidget *gw = new QOSGWidget (w, 0, 0, true);
tmpl->addWidget (gw);
w->setLayout(tmpl);
uiLayout->addWidget (w, y, x);
// setup views as usual
osgViewer::View* view = new osgViewer::View;
view->getCamera()->setGraphicsContext(gw->getGraphicsWindow ());
view->getCamera()->setProjectionMatrixAsPerspective
(30.0f,
static_cast<double>(width*2)/static_cast<double>(height), 1.0, 1000.0);
view->getCamera()->setViewport(new
osg::Viewport(0,0,size,size));
view->addEventHandler(new osgViewer::StatsHandler);
view->setCameraManipulator(new osgGA::TrackballManipulator);
view->setSceneData(loadedModel.get ());
ctimer->_viewer->addView(view);
}
//uiLayout->addWidget (ctimer);
wy->setLayout (uiLayout);
wy->resize (width, height);
wy->show ();
// we need the timer to be visible for repaints
// NOTE: this is a workaround since we're not using QT's moc
precompiler here..
ctimer->resize (1,1);
ctimer->show ();
a.connect( &a, SIGNAL(lastWindowClosed()), &a, SLOT(quit()) );
return a.exec();
}
#endif
else
{
osg::ref_ptr<ViewerQOSG> viewerWindow(new ViewerQOSG);
// Open the ViewerQOSG window at 30/30 instead of 0/0. In some
instances,
// the window may otherwise lack any window decoration.
viewerWindow->setGeometry(0,0,640,480);
// viewerWindow->setGeometry(30,30,640,480);
// Setup the camera only after ViewerQOSG's Qt base class has been
// initialized. Without this change the view doesn't cover the whole
// window.
viewerWindow->updateCamera();
viewerWindow->setCameraManipulator(new osgGA::TrackballManipulator);
viewerWindow->setSceneData(loadedModel.get());
viewerWindow->show();
setupManipulatorAndHandler(*viewerWindow.get(), arguments);
a.connect( &a, SIGNAL(lastWindowClosed()), &a, SLOT(quit()) );
return a.exec();
}
}
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