Hi all, I'm sending this in to start a discussion on the way that multitouch support is implemented in the GraphicsWindowQT class. Around the time that the new gesture code path was added I had put together a different approach for a customer against an old version of OSG but never got around to submitting it. I just got around to trying the latest osgEarth's QT multitouch support with my Dell touch screen monitor and it doesn't appear to work correctly for me, at least with the EarthManipulator in osgEarth. Things jump around like crazy whenever I use multiple touches. So I found my old code and integrated it into the latest OSG to see if it worked any better, and it does.
This patch disables the gesture support by undeffing the USE_GESTURES preprocessor at the top of the GraphicsWindowQT.cpp. It then enables QT touch events by calling setAttribute(Qt::WA_AcceptTouchEvents) on the GLWidget. Then there is a new code block at the end of the GLWidget::event function that handles all the multitouch events. This is essentially a direct copy of how touch events work in the GraphicsWindowWin32 with a small change to detect if a touch event is the "primary" touch to avoid also sending along a mouse event for that touch or else you get double events. This implementation seems more in line with what the other GraphicsWindow implementations are doing instead of the gesture code path that is currently in there. If this appears to work for others I'm happy to officially submit it to Robert but I wanted to make sure I wasn't missing something first. Thanks! Jason
/* -*-c++-*- OpenSceneGraph - Copyright (C) 2009 Wang Rui
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#include <osg/DeleteHandler>
#include <osgQt/GraphicsWindowQt>
#include <osgViewer/ViewerBase>
#include <QInputEvent>
#include <QtGui/QTouchEvent>
#if (QT_VERSION>=QT_VERSION_CHECK(4, 6, 0))
# define USE_GESTURES
# include <QGestureEvent>
# include <QGesture>
#endif
// Undefine gesture support
#undef USE_GESTURES
using namespace osgQt;
class QtKeyboardMap
{
public:
QtKeyboardMap()
{
mKeyMap[Qt::Key_Escape ] = osgGA::GUIEventAdapter::KEY_Escape;
mKeyMap[Qt::Key_Delete ] = osgGA::GUIEventAdapter::KEY_Delete;
mKeyMap[Qt::Key_Home ] = osgGA::GUIEventAdapter::KEY_Home;
mKeyMap[Qt::Key_Enter ] = osgGA::GUIEventAdapter::KEY_KP_Enter;
mKeyMap[Qt::Key_End ] = osgGA::GUIEventAdapter::KEY_End;
mKeyMap[Qt::Key_Return ] = osgGA::GUIEventAdapter::KEY_Return;
mKeyMap[Qt::Key_PageUp ] = osgGA::GUIEventAdapter::KEY_Page_Up;
mKeyMap[Qt::Key_PageDown ] = osgGA::GUIEventAdapter::KEY_Page_Down;
mKeyMap[Qt::Key_Left ] = osgGA::GUIEventAdapter::KEY_Left;
mKeyMap[Qt::Key_Right ] = osgGA::GUIEventAdapter::KEY_Right;
mKeyMap[Qt::Key_Up ] = osgGA::GUIEventAdapter::KEY_Up;
mKeyMap[Qt::Key_Down ] = osgGA::GUIEventAdapter::KEY_Down;
mKeyMap[Qt::Key_Backspace ] = osgGA::GUIEventAdapter::KEY_BackSpace;
mKeyMap[Qt::Key_Tab ] = osgGA::GUIEventAdapter::KEY_Tab;
mKeyMap[Qt::Key_Space ] = osgGA::GUIEventAdapter::KEY_Space;
mKeyMap[Qt::Key_Delete ] = osgGA::GUIEventAdapter::KEY_Delete;
mKeyMap[Qt::Key_Alt ] = osgGA::GUIEventAdapter::KEY_Alt_L;
mKeyMap[Qt::Key_Shift ] = osgGA::GUIEventAdapter::KEY_Shift_L;
mKeyMap[Qt::Key_Control ] = osgGA::GUIEventAdapter::KEY_Control_L;
mKeyMap[Qt::Key_Meta ] = osgGA::GUIEventAdapter::KEY_Meta_L;
mKeyMap[Qt::Key_F1 ] = osgGA::GUIEventAdapter::KEY_F1;
mKeyMap[Qt::Key_F2 ] = osgGA::GUIEventAdapter::KEY_F2;
mKeyMap[Qt::Key_F3 ] = osgGA::GUIEventAdapter::KEY_F3;
mKeyMap[Qt::Key_F4 ] = osgGA::GUIEventAdapter::KEY_F4;
mKeyMap[Qt::Key_F5 ] = osgGA::GUIEventAdapter::KEY_F5;
mKeyMap[Qt::Key_F6 ] = osgGA::GUIEventAdapter::KEY_F6;
mKeyMap[Qt::Key_F7 ] = osgGA::GUIEventAdapter::KEY_F7;
mKeyMap[Qt::Key_F8 ] = osgGA::GUIEventAdapter::KEY_F8;
mKeyMap[Qt::Key_F9 ] = osgGA::GUIEventAdapter::KEY_F9;
mKeyMap[Qt::Key_F10 ] = osgGA::GUIEventAdapter::KEY_F10;
mKeyMap[Qt::Key_F11 ] = osgGA::GUIEventAdapter::KEY_F11;
mKeyMap[Qt::Key_F12 ] = osgGA::GUIEventAdapter::KEY_F12;
mKeyMap[Qt::Key_F13 ] = osgGA::GUIEventAdapter::KEY_F13;
mKeyMap[Qt::Key_F14 ] = osgGA::GUIEventAdapter::KEY_F14;
mKeyMap[Qt::Key_F15 ] = osgGA::GUIEventAdapter::KEY_F15;
mKeyMap[Qt::Key_F16 ] = osgGA::GUIEventAdapter::KEY_F16;
mKeyMap[Qt::Key_F17 ] = osgGA::GUIEventAdapter::KEY_F17;
mKeyMap[Qt::Key_F18 ] = osgGA::GUIEventAdapter::KEY_F18;
mKeyMap[Qt::Key_F19 ] = osgGA::GUIEventAdapter::KEY_F19;
mKeyMap[Qt::Key_F20 ] = osgGA::GUIEventAdapter::KEY_F20;
mKeyMap[Qt::Key_hyphen ] = '-';
mKeyMap[Qt::Key_Equal ] = '=';
mKeyMap[Qt::Key_division ] = osgGA::GUIEventAdapter::KEY_KP_Divide;
mKeyMap[Qt::Key_multiply ] =
osgGA::GUIEventAdapter::KEY_KP_Multiply;
mKeyMap[Qt::Key_Minus ] = '-';
mKeyMap[Qt::Key_Plus ] = '+';
//mKeyMap[Qt::Key_H ] =
osgGA::GUIEventAdapter::KEY_KP_Home;
//mKeyMap[Qt::Key_ ] =
osgGA::GUIEventAdapter::KEY_KP_Up;
//mKeyMap[92 ] =
osgGA::GUIEventAdapter::KEY_KP_Page_Up;
//mKeyMap[86 ] = osgGA::GUIEventAdapter::KEY_KP_Left;
//mKeyMap[87 ] =
osgGA::GUIEventAdapter::KEY_KP_Begin;
//mKeyMap[88 ] =
osgGA::GUIEventAdapter::KEY_KP_Right;
//mKeyMap[83 ] = osgGA::GUIEventAdapter::KEY_KP_End;
//mKeyMap[84 ] = osgGA::GUIEventAdapter::KEY_KP_Down;
//mKeyMap[85 ] =
osgGA::GUIEventAdapter::KEY_KP_Page_Down;
mKeyMap[Qt::Key_Insert ] = osgGA::GUIEventAdapter::KEY_KP_Insert;
//mKeyMap[Qt::Key_Delete ] =
osgGA::GUIEventAdapter::KEY_KP_Delete;
}
~QtKeyboardMap()
{
}
int remapKey(QKeyEvent* event)
{
KeyMap::iterator itr = mKeyMap.find(event->key());
if (itr == mKeyMap.end())
{
return int(*(event->text().toLatin1().data()));
}
else
return itr->second;
}
private:
typedef std::map<unsigned int, int> KeyMap;
KeyMap mKeyMap;
};
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;
HeartBeat();
virtual ~HeartBeat();
void init( osgViewer::ViewerBase *viewer );
void stopTimer();
void timerEvent( QTimerEvent *event );
};
static HeartBeat heartBeat;
#if (QT_VERSION < QT_VERSION_CHECK(5, 2, 0))
#define GETDEVICEPIXELRATIO() 1.0
#else
#define GETDEVICEPIXELRATIO() devicePixelRatio()
#endif
GLWidget::GLWidget( QWidget* parent, const QGLWidget* shareWidget,
Qt::WindowFlags f, bool forwardKeyEvents )
: QGLWidget(parent, shareWidget, f),
_gw( NULL ),
_forwardKeyEvents( forwardKeyEvents ),
_touchEventsEnabled( false ),
_primaryFromTouch( false )
{
_devicePixelRatio = GETDEVICEPIXELRATIO();
setAttribute(Qt::WA_AcceptTouchEvents);
}
GLWidget::GLWidget( QGLContext* context, QWidget* parent, const QGLWidget*
shareWidget, Qt::WindowFlags f,
bool forwardKeyEvents )
: QGLWidget(context, parent, shareWidget, f),
_gw( NULL ),
_forwardKeyEvents( forwardKeyEvents ),
_touchEventsEnabled( false ),
_primaryFromTouch( false )
{
_devicePixelRatio = GETDEVICEPIXELRATIO();
setAttribute(Qt::WA_AcceptTouchEvents);
}
GLWidget::GLWidget( const QGLFormat& format, QWidget* parent, const QGLWidget*
shareWidget, Qt::WindowFlags f,
bool forwardKeyEvents )
: QGLWidget(format, parent, shareWidget, f),
_gw( NULL ),
_forwardKeyEvents( forwardKeyEvents ),
_touchEventsEnabled( false ),
_primaryFromTouch( false )
{
_devicePixelRatio = GETDEVICEPIXELRATIO();
setAttribute(Qt::WA_AcceptTouchEvents);
}
GLWidget::~GLWidget()
{
// close GraphicsWindowQt and remove the reference to us
if( _gw )
{
_gw->close();
_gw->_widget = NULL;
_gw = NULL;
}
}
void GLWidget::setTouchEventsEnabled(bool e)
{
#ifdef USE_GESTURES
if (e==_touchEventsEnabled)
return;
_touchEventsEnabled = e;
if (_touchEventsEnabled)
{
grabGesture(Qt::PinchGesture);
}
else
{
ungrabGesture(Qt::PinchGesture);
}
#endif
_touchEventsEnabled = e;
}
void GLWidget::processDeferredEvents()
{
QQueue<QEvent::Type> deferredEventQueueCopy;
{
QMutexLocker lock(&_deferredEventQueueMutex);
deferredEventQueueCopy = _deferredEventQueue;
_eventCompressor.clear();
_deferredEventQueue.clear();
}
while (!deferredEventQueueCopy.isEmpty())
{
QEvent event(deferredEventQueueCopy.dequeue());
QGLWidget::event(&event);
}
}
bool GLWidget::event( QEvent* event )
{
#ifdef USE_GESTURES
if ( event->type()==QEvent::Gesture )
return gestureEvent(static_cast<QGestureEvent*>(event));
#endif
// QEvent::Hide
//
// workaround "Qt-workaround" that does glFinish before hiding the widget
// (the Qt workaround was seen at least in Qt 4.6.3 and 4.7.0)
//
// Qt makes the context current, performs glFinish, and releases the
context.
// This makes the problem in OSG multithreaded environment as the context
// is active in another thread, thus it can not be made current for the
purpose
// of glFinish in this thread.
// QEvent::ParentChange
//
// Reparenting GLWidget may create a new underlying window and a new GL
context.
// Qt will then call doneCurrent on the GL context about to be deleted. The
thread
// where old GL context was current has no longer current context to render
to and
// we cannot make new GL context current in this thread.
// We workaround above problems by deferring execution of problematic event
requests.
// These events has to be enqueue and executed later in a main GUI thread
(GUI operations
// outside the main thread are not allowed) just before makeCurrent is
called from the
// right thread. The good place for doing that is right after swap in a
swapBuffersImplementation.
if (event->type() == QEvent::Hide)
{
// enqueue only the last of QEvent::Hide and QEvent::Show
enqueueDeferredEvent(QEvent::Hide, QEvent::Show);
return true;
}
else if (event->type() == QEvent::Show)
{
// enqueue only the last of QEvent::Show or QEvent::Hide
enqueueDeferredEvent(QEvent::Show, QEvent::Hide);
return true;
}
else if (event->type() == QEvent::ParentChange)
{
// enqueue only the last QEvent::ParentChange
enqueueDeferredEvent(QEvent::ParentChange);
return true;
}
else if (event->type() == QEvent::TouchBegin || event->type() ==
QEvent::TouchUpdate || event->type() == QEvent::TouchEnd)
{
if (_touchEventsEnabled)
{
QTouchEvent* touchEvent = dynamic_cast< QTouchEvent*>( event );
if (touchEvent)
{
osg::ref_ptr<osgGA::GUIEventAdapter> osg_event(NULL);
for (QList<QTouchEvent::TouchPoint>::const_iterator itr =
touchEvent->touchPoints().begin(); itr != touchEvent->touchPoints().end();
++itr)
{
float x = itr->pos().x();
float y = itr->pos().y();
int id = itr->id();
if (itr->state() == Qt::TouchPointPressed)
{
if (itr->isPrimary())
{
_primaryFromTouch = true;
}
if (!osg_event) {
osg_event = _gw->getEventQueue()->touchBegan( id,
osgGA::GUIEventAdapter::TOUCH_BEGAN, x, y );
} else {
osg_event->addTouchPoint( id,
osgGA::GUIEventAdapter::TOUCH_BEGAN, x, y);
}
}
else if (itr->state() == Qt::TouchPointMoved)
{
if (!osg_event) {
osg_event = _gw->getEventQueue()->touchMoved( id,
osgGA::GUIEventAdapter::TOUCH_MOVED, x, y);
} else {
osg_event->addTouchPoint( id,
osgGA::GUIEventAdapter::TOUCH_MOVED, x, y);
}
}
else if (itr->state() == Qt::TouchPointReleased)
{
if (itr->isPrimary())
{
_primaryFromTouch = false;
}
if (!osg_event) {
osg_event = _gw->getEventQueue()->touchEnded( id,
osgGA::GUIEventAdapter::TOUCH_ENDED, x, y, 1);
} else {
osg_event->addTouchPoint( id,
osgGA::GUIEventAdapter::TOUCH_ENDED, x, y);
}
}
}
touchEvent->setAccepted( true );
return true;
}
}
}
// perform regular event handling
return QGLWidget::event( event );
}
void GLWidget::setKeyboardModifiers( QInputEvent* event )
{
int modkey = event->modifiers() & (Qt::ShiftModifier | Qt::ControlModifier
| Qt::AltModifier);
unsigned int mask = 0;
if ( modkey & Qt::ShiftModifier ) mask |=
osgGA::GUIEventAdapter::MODKEY_SHIFT;
if ( modkey & Qt::ControlModifier ) mask |=
osgGA::GUIEventAdapter::MODKEY_CTRL;
if ( modkey & Qt::AltModifier ) mask |= osgGA::GUIEventAdapter::MODKEY_ALT;
_gw->getEventQueue()->getCurrentEventState()->setModKeyMask( mask );
}
void GLWidget::resizeEvent( QResizeEvent* event )
{
const QSize& size = event->size();
int scaled_width = static_cast<int>(size.width()*_devicePixelRatio);
int scaled_height = static_cast<int>(size.height()*_devicePixelRatio);
_gw->resized( x(), y(), scaled_width, scaled_height);
_gw->getEventQueue()->windowResize( x(), y(), scaled_width, scaled_height );
_gw->requestRedraw();
}
void GLWidget::moveEvent( QMoveEvent* event )
{
const QPoint& pos = event->pos();
int scaled_width = static_cast<int>(width()*_devicePixelRatio);
int scaled_height = static_cast<int>(height()*_devicePixelRatio);
_gw->resized( pos.x(), pos.y(), scaled_width, scaled_height );
_gw->getEventQueue()->windowResize( pos.x(), pos.y(), scaled_width,
scaled_height );
}
void GLWidget::glDraw()
{
_gw->requestRedraw();
}
void GLWidget::keyPressEvent( QKeyEvent* event )
{
setKeyboardModifiers( event );
int value = s_QtKeyboardMap.remapKey( event );
_gw->getEventQueue()->keyPress( value );
// this passes the event to the regular Qt key event processing,
// among others, it closes popup windows on ESC and forwards the event to
the parent widgets
if( _forwardKeyEvents )
inherited::keyPressEvent( event );
}
void GLWidget::keyReleaseEvent( QKeyEvent* event )
{
if( event->isAutoRepeat() )
{
event->ignore();
}
else
{
setKeyboardModifiers( event );
int value = s_QtKeyboardMap.remapKey( event );
_gw->getEventQueue()->keyRelease( value );
}
// this passes the event to the regular Qt key event processing,
// among others, it closes popup windows on ESC and forwards the event to
the parent widgets
if( _forwardKeyEvents )
inherited::keyReleaseEvent( event );
}
void GLWidget::mousePressEvent( QMouseEvent* event )
{
if (event->button() == Qt::LeftButton && _primaryFromTouch )
{
return;
}
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;
}
setKeyboardModifiers( event );
_gw->getEventQueue()->mouseButtonPress( event->x()*_devicePixelRatio,
event->y()*_devicePixelRatio, button );
}
void GLWidget::mouseReleaseEvent( QMouseEvent* event )
{
if (event->button() == Qt::LeftButton && _primaryFromTouch)
{
return;
}
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;
}
setKeyboardModifiers( event );
_gw->getEventQueue()->mouseButtonRelease( event->x()*_devicePixelRatio,
event->y()*_devicePixelRatio, button );
}
void GLWidget::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;
}
setKeyboardModifiers( event );
_gw->getEventQueue()->mouseDoubleButtonPress( event->x()*_devicePixelRatio,
event->y()*_devicePixelRatio, button );
}
void GLWidget::mouseMoveEvent( QMouseEvent* event )
{
if (_primaryFromTouch)
{
return;
}
setKeyboardModifiers( event );
_gw->getEventQueue()->mouseMotion( event->x()*_devicePixelRatio,
event->y()*_devicePixelRatio );
}
void GLWidget::wheelEvent( QWheelEvent* event )
{
setKeyboardModifiers( event );
_gw->getEventQueue()->mouseScroll(
event->orientation() == Qt::Vertical ?
(event->delta()>0 ? osgGA::GUIEventAdapter::SCROLL_UP :
osgGA::GUIEventAdapter::SCROLL_DOWN) :
(event->delta()>0 ? osgGA::GUIEventAdapter::SCROLL_LEFT :
osgGA::GUIEventAdapter::SCROLL_RIGHT) );
}
#ifdef USE_GESTURES
static osgGA::GUIEventAdapter::TouchPhase translateQtGestureState(
Qt::GestureState state )
{
osgGA::GUIEventAdapter::TouchPhase touchPhase;
switch ( state )
{
case Qt::GestureStarted:
touchPhase = osgGA::GUIEventAdapter::TOUCH_BEGAN;
break;
case Qt::GestureUpdated:
touchPhase = osgGA::GUIEventAdapter::TOUCH_MOVED;
break;
case Qt::GestureFinished:
case Qt::GestureCanceled:
touchPhase = osgGA::GUIEventAdapter::TOUCH_ENDED;
break;
default:
touchPhase = osgGA::GUIEventAdapter::TOUCH_UNKNOWN;
};
return touchPhase;
}
#endif
bool GLWidget::gestureEvent( QGestureEvent* qevent )
{
#ifndef USE_GESTURES
return false;
#else
bool accept = false;
if ( QPinchGesture* pinch = static_cast<QPinchGesture
*>(qevent->gesture(Qt::PinchGesture) ) )
{
const QPointF qcenterf = pinch->centerPoint();
const float angle = pinch->totalRotationAngle();
const float scale = pinch->totalScaleFactor();
const QPoint pinchCenterQt = mapFromGlobal(qcenterf.toPoint());
const osg::Vec2 pinchCenter( pinchCenterQt.x(), pinchCenterQt.y() );
//We don't have absolute positions of the two touches, only a scale and
rotation
//Hence we create pseudo-coordinates which are reasonable, and centered
around the
//real position
const float radius = (width()+height())/4;
const osg::Vec2 vector( scale*cos(angle)*radius,
scale*sin(angle)*radius);
const osg::Vec2 p0 = pinchCenter+vector;
const osg::Vec2 p1 = pinchCenter-vector;
osg::ref_ptr<osgGA::GUIEventAdapter> event = 0;
const osgGA::GUIEventAdapter::TouchPhase touchPhase =
translateQtGestureState( pinch->state() );
if ( touchPhase==osgGA::GUIEventAdapter::TOUCH_BEGAN )
{
event = _gw->getEventQueue()->touchBegan(0 , touchPhase, p0[0],
p0[1] );
}
else if ( touchPhase==osgGA::GUIEventAdapter::TOUCH_MOVED )
{
event = _gw->getEventQueue()->touchMoved( 0, touchPhase, p0[0],
p0[1] );
}
else
{
event = _gw->getEventQueue()->touchEnded( 0, touchPhase, p0[0],
p0[1], 1 );
}
if ( event )
{
event->addTouchPoint( 1, touchPhase, p1[0], p1[1] );
accept = true;
}
}
if ( accept )
qevent->accept();
return accept;
#endif
}
GraphicsWindowQt::GraphicsWindowQt( osg::GraphicsContext::Traits* traits,
QWidget* parent, const QGLWidget* shareWidget, Qt::WindowFlags f )
: _realized(false)
{
_widget = NULL;
_traits = traits;
init( parent, shareWidget, f );
}
GraphicsWindowQt::GraphicsWindowQt( GLWidget* widget )
: _realized(false)
{
_widget = widget;
_traits = _widget ? createTraits( _widget ) : new
osg::GraphicsContext::Traits;
init( NULL, NULL, 0 );
}
GraphicsWindowQt::~GraphicsWindowQt()
{
close();
// remove reference from GLWidget
if ( _widget )
_widget->_gw = NULL;
}
bool GraphicsWindowQt::init( QWidget* parent, const QGLWidget* shareWidget,
Qt::WindowFlags f )
{
// update _widget and parent by WindowData
WindowData* windowData = _traits.get() ?
dynamic_cast<WindowData*>(_traits->inheritedWindowData.get()) : 0;
if ( !_widget )
_widget = windowData ? windowData->_widget : NULL;
if ( !parent )
parent = windowData ? windowData->_parent : NULL;
// create widget if it does not exist
_ownsWidget = _widget == NULL;
if ( !_widget )
{
// shareWidget
if ( !shareWidget ) {
GraphicsWindowQt* sharedContextQt =
dynamic_cast<GraphicsWindowQt*>(_traits->sharedContext.get());
if ( sharedContextQt )
shareWidget = sharedContextQt->getGLWidget();
}
// WindowFlags
Qt::WindowFlags flags = f | Qt::Window | Qt::CustomizeWindowHint;
if ( _traits->windowDecoration )
flags |= Qt::WindowTitleHint | Qt::WindowMinMaxButtonsHint |
Qt::WindowSystemMenuHint
#if (QT_VERSION_CHECK(4, 5, 0) <= QT_VERSION)
| Qt::WindowCloseButtonHint
#endif
;
// create widget
_widget = new GLWidget( traits2qglFormat( _traits.get() ), parent,
shareWidget, flags );
}
// set widget name and position
// (do not set it when we inherited the widget)
if ( _ownsWidget )
{
_widget->setWindowTitle( _traits->windowName.c_str() );
_widget->move( _traits->x, _traits->y );
if ( !_traits->supportsResize ) _widget->setFixedSize( _traits->width,
_traits->height );
else _widget->resize( _traits->width, _traits->height );
}
// initialize widget properties
_widget->setAutoBufferSwap( false );
_widget->setMouseTracking( true );
_widget->setFocusPolicy( Qt::WheelFocus );
_widget->setGraphicsWindow( this );
useCursor( _traits->useCursor );
// initialize State
setState( new osg::State );
getState()->setGraphicsContext(this);
// initialize contextID
if ( _traits.valid() && _traits->sharedContext.valid() )
{
getState()->setContextID(
_traits->sharedContext->getState()->getContextID() );
incrementContextIDUsageCount( getState()->getContextID() );
}
else
{
getState()->setContextID( osg::GraphicsContext::createNewContextID() );
}
// make sure the event queue has the correct window rectangle size and
input range
getEventQueue()->syncWindowRectangleWithGraphcisContext();
return true;
}
QGLFormat GraphicsWindowQt::traits2qglFormat( const
osg::GraphicsContext::Traits* traits )
{
QGLFormat format( QGLFormat::defaultFormat() );
format.setAlphaBufferSize( traits->alpha );
format.setRedBufferSize( traits->red );
format.setGreenBufferSize( traits->green );
format.setBlueBufferSize( traits->blue );
format.setDepthBufferSize( traits->depth );
format.setStencilBufferSize( traits->stencil );
format.setSampleBuffers( traits->sampleBuffers );
format.setSamples( traits->samples );
format.setAlpha( traits->alpha>0 );
format.setDepth( traits->depth>0 );
format.setStencil( traits->stencil>0 );
format.setDoubleBuffer( traits->doubleBuffer );
format.setSwapInterval( traits->vsync ? 1 : 0 );
format.setStereo( traits->quadBufferStereo ? 1 : 0 );
return format;
}
void GraphicsWindowQt::qglFormat2traits( const QGLFormat& format,
osg::GraphicsContext::Traits* traits )
{
traits->red = format.redBufferSize();
traits->green = format.greenBufferSize();
traits->blue = format.blueBufferSize();
traits->alpha = format.alpha() ? format.alphaBufferSize() : 0;
traits->depth = format.depth() ? format.depthBufferSize() : 0;
traits->stencil = format.stencil() ? format.stencilBufferSize() : 0;
traits->sampleBuffers = format.sampleBuffers() ? 1 : 0;
traits->samples = format.samples();
traits->quadBufferStereo = format.stereo();
traits->doubleBuffer = format.doubleBuffer();
traits->vsync = format.swapInterval() >= 1;
}
osg::GraphicsContext::Traits* GraphicsWindowQt::createTraits( const QGLWidget*
widget )
{
osg::GraphicsContext::Traits *traits = new osg::GraphicsContext::Traits;
qglFormat2traits( widget->format(), traits );
QRect r = widget->geometry();
traits->x = r.x();
traits->y = r.y();
traits->width = r.width();
traits->height = r.height();
traits->windowName = widget->windowTitle().toLocal8Bit().data();
Qt::WindowFlags f = widget->windowFlags();
traits->windowDecoration = ( f & Qt::WindowTitleHint ) &&
( f & Qt::WindowMinMaxButtonsHint ) &&
( f & Qt::WindowSystemMenuHint );
QSizePolicy sp = widget->sizePolicy();
traits->supportsResize = sp.horizontalPolicy() != QSizePolicy::Fixed ||
sp.verticalPolicy() != QSizePolicy::Fixed;
return traits;
}
bool GraphicsWindowQt::setWindowRectangleImplementation( int x, int y, int
width, int height )
{
if ( _widget == NULL )
return false;
_widget->setGeometry( x, y, width, height );
return true;
}
void GraphicsWindowQt::getWindowRectangle( int& x, int& y, int& width, int&
height )
{
if ( _widget )
{
const QRect& geom = _widget->geometry();
x = geom.x();
y = geom.y();
width = geom.width();
height = geom.height();
}
}
bool GraphicsWindowQt::setWindowDecorationImplementation( bool windowDecoration
)
{
Qt::WindowFlags flags =
Qt::Window|Qt::CustomizeWindowHint;//|Qt::WindowStaysOnTopHint;
if ( windowDecoration )
flags |=
Qt::WindowTitleHint|Qt::WindowMinMaxButtonsHint|Qt::WindowSystemMenuHint;
_traits->windowDecoration = windowDecoration;
if ( _widget )
{
_widget->setWindowFlags( flags );
return true;
}
return false;
}
bool GraphicsWindowQt::getWindowDecoration() const
{
return _traits->windowDecoration;
}
void GraphicsWindowQt::grabFocus()
{
if ( _widget )
_widget->setFocus( Qt::ActiveWindowFocusReason );
}
void GraphicsWindowQt::grabFocusIfPointerInWindow()
{
if ( _widget->underMouse() )
_widget->setFocus( Qt::ActiveWindowFocusReason );
}
void GraphicsWindowQt::raiseWindow()
{
if ( _widget )
_widget->raise();
}
void GraphicsWindowQt::setWindowName( const std::string& name )
{
if ( _widget )
_widget->setWindowTitle( name.c_str() );
}
std::string GraphicsWindowQt::getWindowName()
{
return _widget ? _widget->windowTitle().toStdString() : "";
}
void GraphicsWindowQt::useCursor( bool cursorOn )
{
if ( _widget )
{
_traits->useCursor = cursorOn;
if ( !cursorOn ) _widget->setCursor( Qt::BlankCursor );
else _widget->setCursor( _currentCursor );
}
}
void GraphicsWindowQt::setCursor( MouseCursor cursor )
{
if ( cursor==InheritCursor && _widget )
{
_widget->unsetCursor();
}
switch ( cursor )
{
case NoCursor: _currentCursor = Qt::BlankCursor; break;
case RightArrowCursor: case LeftArrowCursor: _currentCursor =
Qt::ArrowCursor; break;
case InfoCursor: _currentCursor = Qt::SizeAllCursor; break;
case DestroyCursor: _currentCursor = Qt::ForbiddenCursor; break;
case HelpCursor: _currentCursor = Qt::WhatsThisCursor; break;
case CycleCursor: _currentCursor = Qt::ForbiddenCursor; break;
case SprayCursor: _currentCursor = Qt::SizeAllCursor; break;
case WaitCursor: _currentCursor = Qt::WaitCursor; break;
case TextCursor: _currentCursor = Qt::IBeamCursor; break;
case CrosshairCursor: _currentCursor = Qt::CrossCursor; break;
case HandCursor: _currentCursor = Qt::OpenHandCursor; break;
case UpDownCursor: _currentCursor = Qt::SizeVerCursor; break;
case LeftRightCursor: _currentCursor = Qt::SizeHorCursor; break;
case TopSideCursor: case BottomSideCursor: _currentCursor =
Qt::UpArrowCursor; break;
case LeftSideCursor: case RightSideCursor: _currentCursor =
Qt::SizeHorCursor; break;
case TopLeftCorner: _currentCursor = Qt::SizeBDiagCursor; break;
case TopRightCorner: _currentCursor = Qt::SizeFDiagCursor; break;
case BottomRightCorner: _currentCursor = Qt::SizeBDiagCursor; break;
case BottomLeftCorner: _currentCursor = Qt::SizeFDiagCursor; break;
default: break;
};
if ( _widget ) _widget->setCursor( _currentCursor );
}
bool GraphicsWindowQt::valid() const
{
return _widget && _widget->isValid();
}
bool GraphicsWindowQt::realizeImplementation()
{
// save the current context
// note: this will save only Qt-based contexts
const QGLContext *savedContext = QGLContext::currentContext();
// initialize GL context for the widget
if ( !valid() )
_widget->glInit();
// make current
_realized = true;
bool result = makeCurrent();
_realized = false;
// fail if we do not have current context
if ( !result )
{
if ( savedContext )
const_cast< QGLContext* >( savedContext )->makeCurrent();
OSG_WARN << "Window realize: Can make context current." << std::endl;
return false;
}
_realized = true;
// make sure the event queue has the correct window rectangle size and
input range
getEventQueue()->syncWindowRectangleWithGraphcisContext();
// make this window's context not current
// note: this must be done as we will probably make the context current
from another thread
// and it is not allowed to have one context current in two threads
if( !releaseContext() )
OSG_WARN << "Window realize: Can not release context." << std::endl;
// restore previous context
if ( savedContext )
const_cast< QGLContext* >( savedContext )->makeCurrent();
return true;
}
bool GraphicsWindowQt::isRealizedImplementation() const
{
return _realized;
}
void GraphicsWindowQt::closeImplementation()
{
if ( _widget )
_widget->close();
_realized = false;
}
void GraphicsWindowQt::runOperations()
{
// While in graphics thread this is last chance to do something useful
before
// graphics thread will execute its operations.
if (_widget->getNumDeferredEvents() > 0)
_widget->processDeferredEvents();
if (QGLContext::currentContext() != _widget->context())
_widget->makeCurrent();
GraphicsWindow::runOperations();
}
bool GraphicsWindowQt::makeCurrentImplementation()
{
if (_widget->getNumDeferredEvents() > 0)
_widget->processDeferredEvents();
_widget->makeCurrent();
return true;
}
bool GraphicsWindowQt::releaseContextImplementation()
{
_widget->doneCurrent();
return true;
}
void GraphicsWindowQt::swapBuffersImplementation()
{
_widget->swapBuffers();
// FIXME: the processDeferredEvents should really be executed in a GUI
(main) thread context but
// I couln't find any reliable way to do this. For now, lets hope non of
*GUI thread only operations* will
// be executed in a QGLWidget::event handler. On the other hand, calling
GUI only operations in the
// QGLWidget event handler is an indication of a Qt bug.
if (_widget->getNumDeferredEvents() > 0)
_widget->processDeferredEvents();
// We need to call makeCurrent here to restore our previously current
context
// which may be changed by the processDeferredEvents function.
if (QGLContext::currentContext() != _widget->context())
_widget->makeCurrent();
}
void GraphicsWindowQt::requestWarpPointer( float x, float y )
{
if ( _widget )
QCursor::setPos( _widget->mapToGlobal(QPoint((int)x,(int)y)) );
}
class QtWindowingSystem : public osg::GraphicsContext::WindowingSystemInterface
{
public:
QtWindowingSystem()
{
OSG_INFO << "QtWindowingSystemInterface()" << std::endl;
}
~QtWindowingSystem()
{
if (osg::Referenced::getDeleteHandler())
{
osg::Referenced::getDeleteHandler()->setNumFramesToRetainObjects(0);
osg::Referenced::getDeleteHandler()->flushAll();
}
}
// Access the Qt windowing system through this singleton class.
static QtWindowingSystem* getInterface()
{
static QtWindowingSystem* qtInterface = new QtWindowingSystem;
return qtInterface;
}
// Return the number of screens present in the system
virtual unsigned int getNumScreens( const
osg::GraphicsContext::ScreenIdentifier& /*si*/ )
{
OSG_WARN << "osgQt: getNumScreens() not implemented yet." << std::endl;
return 0;
}
// Return the resolution of specified screen
// (0,0) is returned if screen is unknown
virtual void getScreenSettings( const
osg::GraphicsContext::ScreenIdentifier& /*si*/,
osg::GraphicsContext::ScreenSettings & /*resolution*/ )
{
OSG_WARN << "osgQt: getScreenSettings() not implemented yet." <<
std::endl;
}
// Set the resolution for given screen
virtual bool setScreenSettings( const
osg::GraphicsContext::ScreenIdentifier& /*si*/, const
osg::GraphicsContext::ScreenSettings & /*resolution*/ )
{
OSG_WARN << "osgQt: setScreenSettings() not implemented yet." <<
std::endl;
return false;
}
// Enumerates available resolutions
virtual void enumerateScreenSettings( const
osg::GraphicsContext::ScreenIdentifier& /*screenIdentifier*/,
osg::GraphicsContext::ScreenSettingsList & /*resolution*/ )
{
OSG_WARN << "osgQt: enumerateScreenSettings() not implemented yet." <<
std::endl;
}
// Create a graphics context with given traits
virtual osg::GraphicsContext* createGraphicsContext(
osg::GraphicsContext::Traits* traits )
{
if (traits->pbuffer)
{
OSG_WARN << "osgQt: createGraphicsContext - pbuffer not implemented
yet." << std::endl;
return NULL;
}
else
{
osg::ref_ptr< GraphicsWindowQt > window = new GraphicsWindowQt(
traits );
if (window->valid()) return window.release();
else return NULL;
}
}
private:
// No implementation for these
QtWindowingSystem( const QtWindowingSystem& );
QtWindowingSystem& operator=( const QtWindowingSystem& );
};
// declare C entry point for static compilation.
extern "C" void OSGQT_EXPORT graphicswindow_Qt(void)
{
osg::GraphicsContext::setWindowingSystemInterface(QtWindowingSystem::getInterface());
}
void osgQt::initQtWindowingSystem()
{
graphicswindow_Qt();
}
void osgQt::setViewer( osgViewer::ViewerBase *viewer )
{
heartBeat.init( viewer );
}
/// Constructor. Must be called from main thread.
HeartBeat::HeartBeat() : _timerId( 0 )
{
}
/// Destructor. Must be called from main thread.
HeartBeat::~HeartBeat()
{
stopTimer();
}
void HeartBeat::stopTimer()
{
if ( _timerId != 0 )
{
killTimer( _timerId );
_timerId = 0;
}
}
/// Initializes the loop for viewer. Must be called from main thread.
void HeartBeat::init( osgViewer::ViewerBase *viewer )
{
if( _viewer == viewer )
return;
stopTimer();
_viewer = viewer;
if( viewer )
{
_timerId = startTimer( 0 );
_lastFrameStartTime.setStartTick( 0 );
}
}
void HeartBeat::timerEvent( QTimerEvent */*event*/ )
{
osg::ref_ptr< osgViewer::ViewerBase > viewer;
if( !_viewer.lock( viewer ) )
{
// viewer has been deleted -> stop timer
stopTimer();
return;
}
// limit the frame rate
if( viewer->getRunMaxFrameRate() > 0.0)
{
double dt = _lastFrameStartTime.time_s();
double minFrameTime = 1.0 / viewer->getRunMaxFrameRate();
if (dt < minFrameTime)
OpenThreads::Thread::microSleep(static_cast<unsigned
int>(1000000.0*(minFrameTime-dt)));
}
else
{
// avoid excessive CPU loading when no frame is required in ON_DEMAND
mode
if( viewer->getRunFrameScheme() == osgViewer::ViewerBase::ON_DEMAND )
{
double dt = _lastFrameStartTime.time_s();
if (dt < 0.01)
OpenThreads::Thread::microSleep(static_cast<unsigned
int>(1000000.0*(0.01-dt)));
}
// record start frame time
_lastFrameStartTime.setStartTick();
// make frame
if( viewer->getRunFrameScheme() == osgViewer::ViewerBase::ON_DEMAND )
{
if( viewer->checkNeedToDoFrame() )
{
viewer->frame();
}
}
else
{
viewer->frame();
}
}
}
GraphicsWindowQt
Description: Binary data
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