FGFS-4.1/OpenSceneGraph
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

From Cory Slep and Robert Osfield, "When using Open Scene Graph and Qt on Android, the resulting thread that an application developer’s Q*Application is run on is different than what Qt considers the “main” thread, which can cause subtle problems. This is because Qt loads native libraries in one thread, and later runs the application in a different thread. They delay running in the second thread as long as possible as they have a nontrivial bootstrapping process. The motivation for Qt having this second thread is to allow them to remain responsive to both Java and native events, and capture events that would otherwise be “missed”

Browse Source 
git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/branches/OpenSceneGraph-3.4@14964 16af8721-9629-0410-8352-f15c8da7e697
This commit is contained in:
Robert Osfield 2015-07-16 15:56:40 +00:00
parent 49c802153d
commit f48a4baa4e
1 changed files with 25 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
src/osgQt/GraphicsWindowQt.cpp
View File

@ -15,6 +15,7 @@
#include <osgQt/GraphicsWindowQt>
#include <osgViewer/ViewerBase>
#include <QInputEvent>
#include <QPointer>
#if (QT_VERSION>=QT_VERSION_CHECK(4, 6, 0))
# define USE_GESTURES
@ -119,18 +120,24 @@ static QtKeyboardMap s_QtKeyboardMap;
/// The object responsible for the scene re-rendering.
class HeartBeat : public QObject {
public:
int _timerId;
osg::Timer _lastFrameStartTime;
osg::observer_ptr< osgViewer::ViewerBase > _viewer;
int _timerId;
osg::Timer _lastFrameStartTime;
osg::observer_ptr< osgViewer::ViewerBase > _viewer;
HeartBeat();
virtual ~HeartBeat();
void init( osgViewer::ViewerBase *viewer );
void stopTimer();
void timerEvent( QTimerEvent *event );
virtual ~HeartBeat();
void init( osgViewer::ViewerBase *viewer );
void stopTimer();
void timerEvent( QTimerEvent *event );
static HeartBeat* instance();
private:
HeartBeat();
static QPointer<HeartBeat> heartBeat;
};
static HeartBeat heartBeat;
QPointer<HeartBeat> HeartBeat::heartBeat;
#if (QT_VERSION < QT_VERSION_CHECK(5, 2, 0))
#define GETDEVICEPIXELRATIO() 1.0
@ -955,7 +962,7 @@ void osgQt::initQtWindowingSystem()
void osgQt::setViewer( osgViewer::ViewerBase *viewer )
{
heartBeat.init( viewer );
HeartBeat::instance()->init( viewer );
}
@ -971,6 +978,14 @@ HeartBeat::~HeartBeat()
stopTimer();
}
HeartBeat* HeartBeat::instance()
{
if (!heartBeat)
{
heartBeat = new HeartBeat();
}
return heartBeat;
}
void HeartBeat::stopTimer()
{