void SignalGrabStrategy::
objectsReleased(const std::vector<SceneObjectPtr>& objs)
{
std::vector<SceneObjectPtr>::const_iterator o;
for ( o = objs.begin(); o != objs.end(); ++o )
{
mGrabbedObjects.erase(std::remove(mGrabbedObjects.begin(),
mGrabbedObjects.end(), *o),
mGrabbedObjects.end());
}
mGrabbing = ! mGrabbedObjects.empty();
mReleaseCallback(objs);
}
void base::IManaged::release()
{
mRefCounter--;
#ifdef _DEBUG
if (mReleaseCallback)
{
mReleaseCallback(this);
}
#endif
if (mRefCounter <= 0)
{
delete this;
}
}
void MultiObjectGrabStrategy::grabbableObjStateChanged(SceneObjectPtr obj)
{
// If mChosenObjects is not empty, then we have a collection of objects to
// grab that have not yet been grabbed. obj may be in mChosenObjects, and
// if it is not grabbable, then it must be removed.
if ( ! mChosenObjects.empty() )
{
std::vector<SceneObjectPtr>::iterator o =
std::find(mChosenObjects.begin(), mChosenObjects.end(), obj);
if ( o != mChosenObjects.end() && ! (*o)->isGrabbable() )
{
mObjConnections[*o].disconnect();
mObjConnections.erase(*o);
std::vector<SceneObjectPtr> objs(1, *o);
mEventData->selectionListReduced(objs);
mChosenObjects.erase(o);
}
}
// If mGrabbedObjects is not empty, then we have grabbed objects, and obj
// may be in that collection. If obj is no longer grabbable, it must be
// removed from mGrabbedObjects.
else if ( ! mGrabbedObjects.empty() )
{
std::vector<SceneObjectPtr>::iterator o =
std::find(mGrabbedObjects.begin(), mGrabbedObjects.end(), obj);
if ( o != mGrabbedObjects.end() && ! (*o)->isGrabbable() )
{
mObjConnections[*o].disconnect();
mObjConnections.erase(*o);
// Inform the code that is using us that we have released a grabbed
// object.
mReleaseCallback(std::vector<SceneObjectPtr>(1, *o));
mGrabbedObjects.erase(o);
// Keep the grabbing state up to date now that mGrabbedObjects has
// changed.
mGrabbing = ! mGrabbedObjects.empty();
}
}
}
void SignalGrabStrategy::release()
{
// Emit the grab signal and get the collection of released objects.
std::vector<SceneObjectPtr> released_objs;
mGrabSignalData->release(released_objs);
if ( ! released_objs.empty() )
{
std::vector<SceneObjectPtr>::iterator o;
for ( o = released_objs.begin(); o != released_objs.end(); ++o )
{
mGrabbedObjects.erase(std::remove(mGrabbedObjects.begin(),
mGrabbedObjects.end(), *o),
mGrabbedObjects.end());
}
mGrabbing = ! mGrabbedObjects.empty();
mReleaseCallback(released_objs);
}
}
void MultiObjectGrabStrategy::update(ViewerPtr viewer)
{
if ( ! mGrabbing )
{
// The user has requested to add mCurIsectObject to the collection of
// objects selected for later grabbing.
if ( mCurIsectObject && mCurIsectObject->isGrabbable() && mChooseBtn() )
{
std::vector<SceneObjectPtr>::iterator o =
std::find(mChosenObjects.begin(), mChosenObjects.end(),
mCurIsectObject);
// Only choose mCurIsectObject for grabbing if it is not already in
// mChosenObjcts.
if ( o == mChosenObjects.end() )
{
mChosenObjects.push_back(mCurIsectObject);
// Connect the grabbable object state change signal to our slot.
mObjConnections[mCurIsectObject] =
mCurIsectObject->grabbableStateChanged().connect(
boost::bind(
&MultiObjectGrabStrategy::grabbableObjStateChanged,
this, _1
)
);
std::vector<SceneObjectPtr> objs(1, mCurIsectObject);
mEventData->selectionListExpanded(objs);
// Use the intersection point of the most recently chosen object.
mIntersectPoint = mCurIntersectPoint;
}
}
// The user has requested to grab all the selected objects (those in
// mChosenObjects).
else if ( mGrabBtn() )
{
// If mChosenObjects is not empty, those objects are the ones that
// we will grab.
if ( ! mChosenObjects.empty() )
{
mGrabbedObjects = mChosenObjects;
mChosenObjects.clear();
mGrabbing = true;
}
// If mChosenObjects is empty but we are intersecting an object,
// then that will be the one that we grab.
else if ( mCurIsectObject )
{
mGrabbedObjects.resize(1);
mGrabbedObjects[0] = mCurIsectObject;
mGrabbing = true;
}
// If mGrabbing is false at this point, then there is nothing to
// grab. Otherwise, invoke mGrabCallback to indicate that one or more
// objects are now grabbed.
if ( mGrabbing )
{
mGrabCallback(mGrabbedObjects, mIntersectPoint);
}
}
}
// If we are grabbing an object and the release button has just been
// pressed, then release the grabbed object.
else if ( mGrabbing && mReleaseBtn() )
{
// We no longer care about grabbable state changes because
// mGrabbedObjects is about to be emptied.
std::for_each(
mObjConnections.begin(), mObjConnections.end(),
boost::bind(&boost::signals::connection::disconnect,
boost::bind(&obj_conn_map_t::value_type::second, _1))
);
// Update our state to reflect that we are no longer grabbing an object.
mGrabbing = false;
mReleaseCallback(mGrabbedObjects);
mGrabbedObjects.clear();
}
}
