Method refreshChannelSelectors

Engine/Node.cpp:7178–7253

}

bool
Node::refreshChannelSelectors()
{
    if ( !isNodeCreated() ) {
        return false;
    }

    double time = getApp()->getTimeLine()->currentFrame();
    // Refresh each layer selector (input and output)
    bool hasChanged = false;
    for (std::map<int, ChannelSelector>::iterator it = _imp->channelsSelectors.begin(); it != _imp->channelsSelectors.end(); ++it) {

        int inputNb = it->first;


        // The Output Layer menu has a All choice, input layers menus have a None choice.
        std::vector<ChoiceOption> choices;
        if (inputNb >= 0) {
            choices.push_back(ChoiceOption("None", "", ""));
        }


        std::list<ImagePlaneDesc> availableComponents;
        _imp->effect->getAvailableLayers(time, ViewIdx(0), inputNb,  &availableComponents);

        for (std::list<ImagePlaneDesc>::const_iterator it2 = availableComponents.begin(); it2 != availableComponents.end(); ++it2) {
            ChoiceOption layerOption = it2->getPlaneOption();
            choices.push_back(layerOption);
        }

        {
            KnobChoicePtr layerKnob = it->second.layer.lock();

            bool menuChanged = layerKnob->populateChoices(choices);
            if (menuChanged) {
                hasChanged = true;
                if (inputNb == -1) {
                    s_outputLayerChanged();
                }
            }
        }
    }  // for each layer selector

    // Refresh each mask channel selector

    for (std::map<int, MaskSelector>::iterator it = _imp->maskSelectors.begin(); it != _imp->maskSelectors.end(); ++it) {

        int inputNb = it->first;
        std::vector<ChoiceOption> choices;
        choices.push_back(ChoiceOption("None", "",""));

        // Get the mask input components
        std::list<ImagePlaneDesc> availableComponents;

        _imp->effect->getAvailableLayers(time, ViewIdx(0), inputNb,  &availableComponents);


        for (std::list<ImagePlaneDesc>::const_iterator it2 = availableComponents.begin(); it2 != availableComponents.end(); ++it2) {