void
AnnotationEventCallback::operator()( osg::Node* node, osg::NodeVisitor* nv )
{
osgGA::EventVisitor* ev = static_cast<osgGA::EventVisitor*>(nv);
osgGA::EventVisitor::EventList& events = ev->getEvents();
osgViewer::View* view = static_cast<osgViewer::View*>(ev->getActionAdapter());
for( osgGA::EventVisitor::EventList::const_iterator e = events.begin(); e != events.end(); ++e )
{
osgGA::GUIEventAdapter* ea = e->get();
if ( ea->getEventType() == osgGA::GUIEventAdapter::MOVE ||
ea->getEventType() == osgGA::GUIEventAdapter::DRAG )
{
_args.x = ea->getX();
_args.y = ea->getY();
}
else if ( ea->getEventType() == osgGA::GUIEventAdapter::PUSH )
{
_mouseDown = true;
_args.x = ea->getX();
_args.y = ea->getY();
_args.buttons = ea->getButtonMask();
_args.modkeys = ea->getModKeyMask();
Picker picker( view, node );
Picker::Hits hits;
if ( picker.pick( _args.x, _args.y, hits ) )
{
std::set<AnnotationNode*> fired; // prevent multiple hits on the same instance
for( Picker::Hits::const_iterator h = hits.begin(); h != hits.end(); ++h )
{
AnnotationNode* anno = picker.getNode<AnnotationNode>( *h );
if ( anno && fired.find(anno) == fired.end() )
{
fireEvent( &AnnotationEventHandler::onClick, anno );
fired.insert( anno );
//break;
}
}
}
}
else if ( ea->getEventType() == osgGA::GUIEventAdapter::RELEASE )
{
_mouseDown = false;
}
else if ( ea->getEventType() == osgGA::GUIEventAdapter::FRAME && _hoverEnabled && !_mouseDown )
{
//Insert all the currently hovered annotations into a set to be unhoverd
std::set<AnnotationNode*> toUnHover;
for( std::set<AnnotationNode*>::iterator i = _hovered.begin(); i != _hovered.end(); ++i )
{
toUnHover.insert( *i );
}
Picker picker( view, node );
Picker::Hits hits;
if ( picker.pick( _args.x, _args.y, hits ) )
{
for( Picker::Hits::const_iterator h = hits.begin(); h != hits.end(); ++h )
{
const Picker::Hit& hit = *h;
AnnotationNode* anno = picker.getNode<AnnotationNode>( hit );
if ( anno )
{
//If the annotation ins't current hovered, add it to the list of new hovered items
if ( _hovered.find(anno) == _hovered.end() )
{
_hovered.insert( anno );
fireEvent( &AnnotationEventHandler::onHoverEnter, anno );
}
//It's still hovered, so don't unhover it
toUnHover.erase( anno );
//break;
}
}
}
//The unhovered list now contains all the annotations that were hovered on the previous frame that need to be unhovered
//and removed from the previous hover list
for( std::set<AnnotationNode*>::iterator i = toUnHover.begin(); i != toUnHover.end(); ++i )
{
_hovered.erase( *i );
fireEvent( &AnnotationEventHandler::onHoverLeave, *i );
}
}
}
traverse(node,nv);
}
bool
FeatureQueryTool::handle( const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa )
{
bool handled = false;
bool attempt;
if ( _inputPredicate.valid() )
{
attempt = _inputPredicate->accept(ea);
}
else
{
attempt =
ea.getEventType() == osgGA::GUIEventAdapter::RELEASE &&
_mouseDown &&
fabs(ea.getX()-_mouseDownX) <= 3.0 &&
fabs(ea.getY()-_mouseDownY) <= 3.0;
}
if ( attempt )
{
osg::View* view = aa.asView();
Picker picker(
dynamic_cast<osgViewer::View*>(view),
_mapNode->getModelLayerGroup() );
Picker::Hits hits;
if ( picker.pick( ea.getX(), ea.getY(), hits ) )
{
// find the closest indexed feature to the camera. It must be a feature
// that is not only closest, but exists in the index as well.
FeatureSourceIndexNode* closestIndex = 0L;
FeatureID closestFID;
double closestDistance = DBL_MAX;
osg::Vec3d closestWorldPt;
for(Picker::Hits::iterator hit = hits.begin(); hit != hits.end(); ++hit )
{
FeatureSourceIndexNode* index = picker.getNode<FeatureSourceIndexNode>( *hit );
if ( index && (hit->distance < closestDistance) )
{
FeatureID fid;
if ( index->getFID( hit->drawable, hit->primitiveIndex, fid ) )
{
closestIndex = index;
closestFID = fid;
closestDistance = hit->distance;
closestWorldPt = hit->matrix.valid() ? hit->localIntersectionPoint * (*hit->matrix.get()) : hit->localIntersectionPoint;
}
}
}
if ( closestIndex )
{
OE_DEBUG << LC << "HIT: feature ID = " << (unsigned)closestFID << std::endl;
Callback::EventArgs args;
args._ea = &ea;
args._aa = &aa;
args._worldPoint = closestWorldPt;
for( Callbacks::iterator i = _callbacks.begin(); i != _callbacks.end(); )
{
if ( i->valid() )
{
i->get()->onHit( closestIndex, closestFID, args );
++i;
}
else
{
i = _callbacks.erase( i );
}
}
handled = true;
}
}
if ( !handled )
{
OE_DEBUG << LC << "miss" << std::endl;
Callback::EventArgs args;
args._ea = &ea;
args._aa = &aa;
for( Callbacks::iterator i = _callbacks.begin(); i != _callbacks.end(); )
{
if ( i->valid() )
{
i->get()->onMiss( args );
++i;
}
else
{
i = _callbacks.erase( i );
}
}
}
_mouseDown = false;
}
// unmodified left mouse click
else if (
ea.getEventType() == osgGA::GUIEventAdapter::PUSH &&
ea.getModKeyMask() == 0 &&
ea.getButtonMask() == osgGA::GUIEventAdapter::LEFT_MOUSE_BUTTON)
{
_mouseDown = true;
_mouseDownX = ea.getX();
_mouseDownY = ea.getY();
}
return handled;
}
