Method updateTrackKeysInfoBar

Gui/TrackerPanel.cpp:1978–2033

}

void
TrackerPanelPrivate::updateTrackKeysInfoBar(int time)
{
    std::set<int> keyframes;
    std::list<TrackMarkerPtr> markers;

    context.lock()->getSelectedMarkers(&markers);

    for (std::list<TrackMarkerPtr>::iterator it = markers.begin(); it != markers.end(); ++it) {
        std::set<int> keys;
        (*it)->getUserKeyframes(&keys);
        keyframes.insert( keys.begin(), keys.end() );
    }

    prevKeyframe->setEnabled( !keyframes.empty() );
    nextKeyframe->setEnabled( !keyframes.empty() );
    addKeyframe->setEnabled( !markers.empty() );
    removeKeyframe->setEnabled( !markers.empty() );
    clearAnimation->setEnabled( !markers.empty() );

    totalKeyframes->setValue( (double)keyframes.size() );

    if ( keyframes.empty() ) {
        currentKeyframe->setValue(1.);
        currentKeyframe->setAnimation(0);
    } else {
        ///get the first time that is equal or greater to the current time
        std::set<int>::iterator lowerBound = keyframes.lower_bound(time);
        int dist = 0;
        if ( lowerBound != keyframes.end() ) {
            dist = std::distance(keyframes.begin(), lowerBound);
        }

        if ( lowerBound == keyframes.end() ) {
            ///we're after the last keyframe
            currentKeyframe->setValue( (double)keyframes.size() );
            currentKeyframe->setAnimation(1);
        } else if (*lowerBound == time) {
            currentKeyframe->setValue(dist + 1);
            currentKeyframe->setAnimation(2);
        } else {
            ///we're in-between 2 keyframes, interpolate
            if ( lowerBound == keyframes.begin() ) {
                currentKeyframe->setValue(1.);
            } else {
                std::set<int>::iterator prev = lowerBound;
                if ( prev != keyframes.begin() ) {
                    --prev;
                }
                currentKeyframe->setValue( (double)(time - *prev) / (double)(*lowerBound - *prev) + dist );
            }

            currentKeyframe->setAnimation(1);
        }
    }
} // TrackerPanelPrivate::updateTrackKeysInfoBar

void