Method knobChanged

Engine/ReadNode.cpp:1205–1320

}

bool
ReadNode::knobChanged(KnobI* k,
                      ValueChangedReasonEnum reason,
                      ViewSpec view,
                      double time,
                      bool originatedFromMainThread)
{
    bool ret =  true;

    if ( ( k == _imp->inputFileKnob.lock().get() ) && (reason != eValueChangedReasonTimeChanged) ) {

        NodePtr hasMaster = getNode()->getMasterNode();
        if (hasMaster) {
            // Unslave all knobs since we are going to remove some and recreate others
            unslaveAllKnobs();
        }
        if (_imp->creatingReadNode) {
            NodePtr p = getEmbeddedReader();
            if (p) {
                p->getEffectInstance()->knobChanged(k, reason, view, time, originatedFromMainThread);
            }

            return false;
        }
        try {
            _imp->refreshPluginSelectorKnob();
        } catch (const std::exception& e) {
            setPersistentMessage( eMessageTypeError, e.what() );
        }

        KnobFilePtr fileKnob = _imp->inputFileKnob.lock();
        assert(fileKnob);
        std::string filename = fileKnob->getValue();
        try {
            _imp->createReadNode( false, filename, NodeSerializationPtr() );
        } catch (const std::exception& e) {
            setPersistentMessage( eMessageTypeError, e.what() );
        }
        if (hasMaster) {
            slaveAllKnobs(hasMaster->getEffectInstance().get(), false);
        }
    } else if ( k == _imp->pluginSelectorKnob.lock().get() ) {
        KnobStringPtr pluginIDKnob = _imp->pluginIDStringKnob.lock();
        std::string entry = _imp->pluginSelectorKnob.lock()->getActiveEntry().id;
        if ( entry == pluginIDKnob->getValue() ) {
            return false;
        }

        if (entry == "Default") {
            entry.clear();
        }

        pluginIDKnob->setValue(entry);

        KnobFilePtr fileKnob = _imp->inputFileKnob.lock();
        assert(fileKnob);
        std::string filename = fileKnob->getValue();