diff options
Diffstat (limited to 'src/declarative/util/qdeclarativespringanimation.cpp')
| -rw-r--r-- | src/declarative/util/qdeclarativespringanimation.cpp | 231 |
1 files changed, 100 insertions, 131 deletions
diff --git a/src/declarative/util/qdeclarativespringanimation.cpp b/src/declarative/util/qdeclarativespringanimation.cpp index 8ce4832..6f4ac51 100644 --- a/src/declarative/util/qdeclarativespringanimation.cpp +++ b/src/declarative/util/qdeclarativespringanimation.cpp @@ -54,36 +54,32 @@ QT_BEGIN_NAMESPACE - -class QDeclarativeSpringAnimationPrivate : public QDeclarativeAbstractAnimationPrivate +class QDeclarativeSpringAnimationPrivate : public QDeclarativePropertyAnimationPrivate { Q_DECLARE_PUBLIC(QDeclarativeSpringAnimation) public: - QDeclarativeSpringAnimationPrivate() - : currentValue(0), to(0), from(0), maxVelocity(0), lastTime(0) - , mass(1.0), spring(0.), damping(0.), velocity(0), epsilon(0.01) - , modulus(0.0), useMass(false), haveModulus(false), enabled(true) - , fromDefined(false), toDefined(false) - , mode(Track), clock(this) {} - - qreal currentValue; - qreal to; - qreal from; + + + struct SpringAnimation { + SpringAnimation() + : currentValue(0), to(0), velocity(0){} + qreal currentValue; + qreal to; + qreal velocity; + }; + QHash<QDeclarativeProperty, SpringAnimation> activeAnimations; + qreal maxVelocity; qreal velocityms; int lastTime; qreal mass; qreal spring; qreal damping; - qreal velocity; qreal epsilon; qreal modulus; bool useMass : 1; bool haveModulus : 1; - bool enabled : 1; - bool fromDefined : 1; - bool toDefined : 1; enum Mode { Track, @@ -92,38 +88,68 @@ public: }; Mode mode; - void tick(int); + QDeclarativeSpringAnimationPrivate() + : maxVelocity(0), velocityms(0), lastTime(0) + , mass(1.0), spring(0.), damping(0.), epsilon(0.01) + , modulus(0.0), useMass(false), haveModulus(false) + , mode(Track), clock(0) + { } + + void tick(int time); + bool animate(const QDeclarativeProperty &property, SpringAnimation &animation, int elapsed); void updateMode(); - QTickAnimationProxy<QDeclarativeSpringAnimationPrivate, &QDeclarativeSpringAnimationPrivate::tick> clock; + typedef QTickAnimationProxy<QDeclarativeSpringAnimationPrivate, &QDeclarativeSpringAnimationPrivate::tick> Clock; + Clock *clock; }; void QDeclarativeSpringAnimationPrivate::tick(int time) { if (mode == Track) { - clock.stop(); + clock->stop(); return; } - int elapsed = time - lastTime; if (!elapsed) return; - qreal srcVal = to; + + if (mode == Spring) { + if (elapsed < 16) // capped at 62fps. + return; + int count = elapsed / 16; + lastTime = time - (elapsed - count * 16); + } else { + lastTime = time; + } + + QMutableHashIterator<QDeclarativeProperty, SpringAnimation> it(activeAnimations); + while (it.hasNext()) { + it.next(); + if (animate(it.key(), it.value(), elapsed)) + it.remove(); + } + + if (activeAnimations.isEmpty()) + clock->stop(); +} + +bool QDeclarativeSpringAnimationPrivate::animate(const QDeclarativeProperty &property, SpringAnimation &animation, int elapsed) +{ + + qreal srcVal = animation.to; bool stop = false; if (haveModulus) { - currentValue = fmod(currentValue, modulus); + animation.currentValue = fmod(animation.currentValue, modulus); srcVal = fmod(srcVal, modulus); } if (mode == Spring) { - if (elapsed < 16) // capped at 62fps. - return; // Real men solve the spring DEs using RK4. // We'll do something much simpler which gives a result that looks fine. int count = elapsed / 16; for (int i = 0; i < count; ++i) { - qreal diff = srcVal - currentValue; + qreal diff = srcVal - animation.currentValue; if (haveModulus && qAbs(diff) > modulus / 2) { if (diff < 0) diff += modulus; @@ -131,32 +157,31 @@ void QDeclarativeSpringAnimationPrivate::tick(int time) diff -= modulus; } if (useMass) - velocity = velocity + (spring * diff - damping * velocity) / mass; + animation.velocity = animation.velocity + (spring * diff - damping * animation.velocity) / mass; else - velocity = velocity + spring * diff - damping * velocity; + animation.velocity = animation.velocity + spring * diff - damping * animation.velocity; if (maxVelocity > 0.) { // limit velocity - if (velocity > maxVelocity) - velocity = maxVelocity; - else if (velocity < -maxVelocity) - velocity = -maxVelocity; + if (animation.velocity > maxVelocity) + animation.velocity = maxVelocity; + else if (animation.velocity < -maxVelocity) + animation.velocity = -maxVelocity; } - currentValue += velocity * 16.0 / 1000.0; + animation.currentValue += animation.velocity * 16.0 / 1000.0; if (haveModulus) { - currentValue = fmod(currentValue, modulus); - if (currentValue < 0.0) - currentValue += modulus; + animation.currentValue = fmod(animation.currentValue, modulus); + if (animation.currentValue < 0.0) + animation.currentValue += modulus; } } - if (qAbs(velocity) < epsilon && qAbs(srcVal - currentValue) < epsilon) { - velocity = 0.0; - currentValue = srcVal; + if (qAbs(animation.velocity) < epsilon && qAbs(srcVal - animation.currentValue) < epsilon) { + animation.velocity = 0.0; + animation.currentValue = srcVal; stop = true; } - lastTime = time - (elapsed - count * 16); } else { qreal moveBy = elapsed * velocityms; - qreal diff = srcVal - currentValue; + qreal diff = srcVal - animation.currentValue; if (haveModulus && qAbs(diff) > modulus / 2) { if (diff < 0) diff += modulus; @@ -164,33 +189,31 @@ void QDeclarativeSpringAnimationPrivate::tick(int time) diff -= modulus; } if (diff > 0) { - currentValue += moveBy; + animation.currentValue += moveBy; if (haveModulus) - currentValue = fmod(currentValue, modulus); - if (currentValue > to) { - currentValue = to; + animation.currentValue = fmod(animation.currentValue, modulus); + if (animation.currentValue > animation.to) { + animation.currentValue = animation.to; stop = true; } } else { - currentValue -= moveBy; - if (haveModulus && currentValue < 0.0) - currentValue = fmod(currentValue, modulus) + modulus; - if (currentValue < to) { - currentValue = to; + animation.currentValue -= moveBy; + if (haveModulus && animation.currentValue < 0.0) + animation.currentValue = fmod(animation.currentValue, modulus) + modulus; + if (animation.currentValue < animation.to) { + animation.currentValue = animation.to; stop = true; } } - lastTime = time; } - qreal old_to = to; + qreal old_to = animation.to; - QDeclarativePropertyPrivate::write(defaultProperty, currentValue, + QDeclarativePropertyPrivate::write(property, animation.currentValue, QDeclarativePropertyPrivate::BypassInterceptor | QDeclarativePropertyPrivate::DontRemoveBinding); - if (stop && old_to == to) // do not stop if we got restarted - clock.stop(); + return (stop && old_to == animation.to); // do not stop if we got restarted } void QDeclarativeSpringAnimationPrivate::updateMode() @@ -205,6 +228,7 @@ void QDeclarativeSpringAnimationPrivate::updateMode() /*! \qmlclass SpringAnimation QDeclarativeSpringAnimation + \inherits Animation \since 4.7 \brief The SpringAnimation element allows a property to track a value in a spring-like motion. @@ -223,86 +247,23 @@ void QDeclarativeSpringAnimationPrivate::updateMode() Like any other animation element, a SpringAnimation can be applied in a number of ways, including transitions, behaviors and property value - sources. The \l PropertyAnimation documentation shows a variety of methods + sources. The \l {QML Animation} documentation shows a variety of methods for creating animations. \sa SmoothedAnimation, {QML Animation}, {declarative/animation/basics}{Animation basics example}, {declarative/toys/clocks}{Clocks example} */ QDeclarativeSpringAnimation::QDeclarativeSpringAnimation(QObject *parent) -: QDeclarativeAbstractAnimation(*(new QDeclarativeSpringAnimationPrivate),parent) -{ -} - -QDeclarativeSpringAnimation::~QDeclarativeSpringAnimation() -{ -} - -void QDeclarativeSpringAnimation::setTarget(const QDeclarativeProperty &property) +: QDeclarativeNumberAnimation(*(new QDeclarativeSpringAnimationPrivate),parent) { Q_D(QDeclarativeSpringAnimation); - d->defaultProperty = property; - d->currentValue = property.read().toReal(); - if (!d->avoidPropertyValueSourceStart) { - setRunning(true); - } -} - -qreal QDeclarativeSpringAnimation::to() const -{ - Q_D(const QDeclarativeSpringAnimation); - return d->toDefined ? d->to : 0; -} - -/*! - \qmlproperty real SpringAnimation::to - - This property holds the value at which the animation will end. - - If not set, the animation will continue until it reaches the - value that is being tracked. -*/ - -void QDeclarativeSpringAnimation::setTo(qreal value) -{ - Q_D(QDeclarativeSpringAnimation); - if (d->to == value) - return; - - d->to = value; - d->toDefined = true; - d->lastTime = 0; - emit toChanged(value); + d->clock = new QDeclarativeSpringAnimationPrivate::Clock(d, this); } -qreal QDeclarativeSpringAnimation::from() const -{ - Q_D(const QDeclarativeSpringAnimation); - return d->fromDefined ? d->from : 0; -} - -/*! - \qmlproperty real SpringAnimation::from - - This property holds the value from which the animation will begin. - - If not set, the animation will start whenever the tracked value has - changed, regardless of its value. -*/ - -void QDeclarativeSpringAnimation::setFrom(qreal value) +QDeclarativeSpringAnimation::~QDeclarativeSpringAnimation() { - Q_D(QDeclarativeSpringAnimation); - if (d->from == value) - return; - - d->currentValue = d->from = value; - d->fromDefined = true; - d->lastTime = 0; - emit fromChanged(value); } - /*! \qmlproperty real SpringAnimation::velocity @@ -452,17 +413,25 @@ void QDeclarativeSpringAnimation::transition(QDeclarativeStateActions &actions, Q_D(QDeclarativeSpringAnimation); Q_UNUSED(direction); - if (d->clock.state() != QAbstractAnimation::Running) + if (d->clock->state() != QAbstractAnimation::Running) { d->lastTime = 0; + } - if (!actions.isEmpty()) { - for (int i = 0; i < actions.size(); ++i) { - if (!d->toDefined) - d->to = actions.at(i).toValue.toReal(); - if (!d->fromDefined) - d->currentValue = actions.at(i).fromValue.toReal(); - if (d->mode != QDeclarativeSpringAnimationPrivate::Track) - modified << d->defaultProperty; + QDeclarativeNumberAnimation::transition(actions, modified, direction); + + if (!d->actions) + return; + + if (!d->actions->isEmpty()) { + for (int i = 0; i < d->actions->size(); ++i) { + const QDeclarativeProperty &property = d->actions->at(i).property; + QDeclarativeSpringAnimationPrivate::SpringAnimation &animation + = d->activeAnimations[property]; + animation.to = d->actions->at(i).toValue.toReal(); + if (d->fromIsDefined) + animation.currentValue = d->actions->at(i).fromValue.toReal(); + else + animation.currentValue = property.read().toReal(); } } } @@ -471,7 +440,7 @@ void QDeclarativeSpringAnimation::transition(QDeclarativeStateActions &actions, QAbstractAnimation *QDeclarativeSpringAnimation::qtAnimation() { Q_D(QDeclarativeSpringAnimation); - return &d->clock; + return d->clock; } QT_END_NAMESPACE |