void EnvelopeGraphicsItem::onChangedParameterValue(int index)
{
// update the interpolator if the slope or sustain index have been changed:
if (index <= 1) {
updateInterpolator();
}
}
void QVariantAnimationPrivate::convertValues(int t)
{
//this ensures that all the keyValues are of type t
for (int i = 0; i < keyValues.count(); ++i) {
QVariantAnimation::KeyValue &pair = keyValues[i];
pair.second.convert(static_cast<QVariant::Type>(t));
}
//we also need update to the current interval if needed
currentInterval.start.second.convert(static_cast<QVariant::Type>(t));
currentInterval.end.second.convert(static_cast<QVariant::Type>(t));
//... and the interpolator
updateInterpolator();
}
/*!
\internal
The goal of this function is to update the currentInterval member. As a consequence, we also
need to update the currentValue.
Set \a force to true to always recalculate the interval.
*/
void QVariantAnimationPrivate::recalculateCurrentInterval(bool force/*=false*/)
{
// can't interpolate if we don't have at least 2 values
if ((keyValues.count() + (defaultStartEndValue.isValid() ? 1 : 0)) < 2)
return;
const qreal endProgress = (direction == QAbstractAnimation::Forward) ? qreal(1) : qreal(0);
const qreal progress = easing.valueForProgress(((duration == 0) ? endProgress : qreal(currentTime) / qreal(duration)));
//0 and 1 are still the boundaries
if (force || (currentInterval.start.first > 0 && progress < currentInterval.start.first)
|| (currentInterval.end.first < 1 && progress > currentInterval.end.first)) {
//let's update currentInterval
QVariantAnimation::KeyValues::const_iterator it = qLowerBound(keyValues.constBegin(),
keyValues.constEnd(),
qMakePair(progress, QVariant()),
animationValueLessThan);
if (it == keyValues.constBegin()) {
//the item pointed to by it is the start element in the range
if (it->first == 0 && keyValues.count() > 1) {
currentInterval.start = *it;
currentInterval.end = *(it+1);
} else {
currentInterval.start = qMakePair(qreal(0), defaultStartEndValue);
currentInterval.end = *it;
}
} else if (it == keyValues.constEnd()) {
--it; //position the iterator on the last item
if (it->first == 1 && keyValues.count() > 1) {
//we have an end value (item with progress = 1)
currentInterval.start = *(it-1);
currentInterval.end = *it;
} else {
//we use the default end value here
currentInterval.start = *it;
currentInterval.end = qMakePair(qreal(1), defaultStartEndValue);
}
} else {
currentInterval.start = *(it-1);
currentInterval.end = *it;
}
// update all the values of the currentInterval
updateInterpolator();
}
setCurrentValueForProgress(progress);
}
