Method onSelectionChanged

Gui/MultiInstancePanel.cpp:1114–1264

}

void
MultiInstancePanel::onSelectionChanged(const QItemSelection & newSelection,
                                       const QItemSelection & oldSelection)
{
    std::list<std::pair<Node*, bool> > previouslySelectedInstances;
    QModelIndexList oldIndexes = oldSelection.indexes();

    _imp->getNodesFromSelection(oldIndexes, &previouslySelectedInstances);

    bool copyOnUnSlave = previouslySelectedInstances.size()  <= 1;

    /// new selection
    std::list<std::pair<Node*, bool> > newlySelectedInstances;
    QModelIndexList newIndexes = newSelection.indexes();
    _imp->getNodesFromSelection(newIndexes, &newlySelectedInstances);

    ///Don't consider items that are in both previouslySelectedInstances && newlySelectedInstances

    QModelIndexList rows = _imp->view->selectionModel()->selectedRows();
    bool setDirty = rows.count() > 1;
    std::list<std::pair<Node*, bool> >::iterator nextPreviouslySelected = previouslySelectedInstances.begin();
    if ( nextPreviouslySelected != previouslySelectedInstances.end() ) {
        ++nextPreviouslySelected;
    }


    for (std::list<std::pair<Node*, bool> >::iterator it = previouslySelectedInstances.begin();
         it != previouslySelectedInstances.end(); ++it) {
        ///if the item is in the new selection, don't consider it
        bool skip = false;
        for (std::list<std::pair<Node*, bool> >::iterator it2 = newlySelectedInstances.begin();
             it2 != newlySelectedInstances.end(); ++it2) {
            if (it2->first == it->first) {
                skip = true;
                break;
            }
        } // for(it2)
          ///disconnect all the knobs
        if (!it->second || skip) {
            continue;
        }

        it->first->hideKeyframesFromTimeline( nextPreviouslySelected == previouslySelectedInstances.end() );

        it->first->getEffectInstance()->beginChanges();
        const std::vector<KnobIPtr> & knobs = it->first->getKnobs();
        for (U32 i = 0; i < knobs.size(); ++i) {
            if ( knobs[i]->isDeclaredByPlugin() && !knobs[i]->isInstanceSpecific() && !knobs[i]->getIsSecret() ) {
                for (int j = 0; j < knobs[i]->getDimension(); ++j) {
                    if ( knobs[i]->isSlave(j) ) {
                        knobs[i]->blockValueChanges();
                        knobs[i]->unSlave(j, copyOnUnSlave);
                        knobs[i]->unblockValueChanges();
                    }
                }
            }
        } // for(i)
        it->first->getEffectInstance()->endChanges();