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From Lukas Diduch, added a multithread compsite viewer path, accessible using:

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osgviewerQT --MTCompositeViewer --QOSGWidget cow.osg
This commit is contained in:
Robert Osfield 2008-10-29 10:25:24 +00:00
parent 649bc16753
commit 4b28e22d34
1 changed files with 119 additions and 13 deletions
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132
examples/osgviewerQT/QOSGWidget.cpp
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@ -23,7 +23,8 @@
#include <QtGui/QKeyEvent>
#include <QtGui/QApplication>
#include <QtOpenGL/QGLWidget>
#include <QtGui/QtGui>
#include <QtGui/QWidget>
using Qt::WindowFlags;
#else
@ -71,12 +72,13 @@ typedef osgViewer::GraphicsWindowX11::WindowData WindowData;
#include <osgDB/ReadFile>
#include <iostream>
#include <sstream>
class QOSGWidget : public QWidget
{
public:
QOSGWidget( QWidget * parent = 0, const char * name = 0, WindowFlags f = 0 );
QOSGWidget( QWidget * parent = 0, const char * name = 0, WindowFlags f = 0, bool overrideTraits = false);
virtual ~QOSGWidget() {}
@ -99,13 +101,14 @@ class QOSGWidget : public QWidget
virtual void mouseMoveEvent( QMouseEvent* event );
osg::ref_ptr<osgViewer::GraphicsWindow> _gw;
bool _overrideTraits;
};
QOSGWidget::QOSGWidget( QWidget * parent, const char * name, WindowFlags f):
QOSGWidget::QOSGWidget( QWidget * parent, const char * name, WindowFlags f, bool overrideTraits):
#if USE_QT4
QWidget(parent, f)
QWidget(parent, f), _overrideTraits (overrideTraits)
#else
QWidget(parent, name, f)
QWidget(parent, name, f), _overrideTraits (overrideTraits)
#endif
{
createContext();
@ -114,6 +117,7 @@ QOSGWidget::QOSGWidget( QWidget * parent, const char * name, WindowFlags f):
#if USE_QT4
setAttribute(Qt::WA_PaintOnScreen);
setAttribute(Qt::WA_NoSystemBackground);
setFocusPolicy(Qt::ClickFocus);
#else
setBackgroundMode(Qt::NoBackground);
#endif
@ -158,6 +162,16 @@ void QOSGWidget::createContext()
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)
{
@ -301,6 +315,38 @@ class CompositeViewerQOSG : public osgViewer::CompositeViewer, public QOSGWidget
};
#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.
@ -317,13 +363,13 @@ void setupManipulatorAndHandler(osgViewer::View & viewer, osg::ArgumentParser &
// 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);
@ -342,13 +388,12 @@ int mainQOSGWidget(QApplication& a, osg::ArgumentParser& arguments)
}
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(0,0,640,480);
unsigned int width = viewerWindow->width();
unsigned int height = viewerWindow->height();
@ -382,20 +427,81 @@ int mainQOSGWidget(QApplication& a, osg::ArgumentParser& arguments)
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);
viewerWindow->setGeometry(0,0,640,480);
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();
}
}