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Diffstat (limited to 'src/declarative/util/qmltimeline.cpp')
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diff --git a/src/declarative/util/qmltimeline.cpp b/src/declarative/util/qmltimeline.cpp new file mode 100644 index 0000000..130e02d --- /dev/null +++ b/src/declarative/util/qmltimeline.cpp @@ -0,0 +1,941 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtDeclarative module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qmltimeline_p_p.h" + +#include <QDebug> +#include <QMutex> +#include <QThread> +#include <QWaitCondition> +#include <QEvent> +#include <QCoreApplication> +#include <QEasingCurve> +#include <QTime> + +QT_BEGIN_NAMESPACE + +struct Update { + Update(QmlTimeLineValue *_g, qreal _v) + : g(_g), v(_v) {} + Update(const QmlTimeLineEvent &_e) + : g(0), v(0), e(_e) {} + + QmlTimeLineValue *g; + qreal v; + QmlTimeLineEvent e; +}; + +struct QmlTimeLinePrivate +{ + QmlTimeLinePrivate(QmlTimeLine *); + + struct Op { + enum Type { + Pause, + Set, + Move, + MoveBy, + Accel, + AccelDistance, + Execute + }; + Op() {} + Op(Type t, int l, qreal v, qreal v2, int o, + const QmlTimeLineEvent &ev = QmlTimeLineEvent(), const QEasingCurve &es = QEasingCurve()) + : type(t), length(l), value(v), value2(v2), order(o), event(ev), + easing(es) {} + Op(const Op &o) + : type(o.type), length(o.length), value(o.value), value2(o.value2), + order(o.order), event(o.event), easing(o.easing) {} + Op &operator=(const Op &o) { + type = o.type; length = o.length; value = o.value; + value2 = o.value2; order = o.order; event = o.event; + easing = o.easing; + return *this; + } + + Type type; + int length; + qreal value; + qreal value2; + + int order; + QmlTimeLineEvent event; + QEasingCurve easing; + }; + struct TimeLine + { + TimeLine() : length(0), consumedOpLength(0), base(0.) {} + QList<Op> ops; + int length; + int consumedOpLength; + qreal base; + }; + + int length; + int syncPoint; + typedef QHash<QmlTimeLineObject *, TimeLine> Ops; + Ops ops; + QmlTimeLine *q; + + void add(QmlTimeLineObject &, const Op &); + qreal value(const Op &op, int time, qreal base, bool *) const; + + int advance(int); + + bool clockRunning; + int prevTime; + + int order; + + QmlTimeLine::SyncMode syncMode; + int syncAdj; + QList<QPair<int, Update> > *updateQueue; +}; + +QmlTimeLinePrivate::QmlTimeLinePrivate(QmlTimeLine *parent) +: length(0), syncPoint(0), q(parent), clockRunning(false), prevTime(0), order(0), syncMode(QmlTimeLine::LocalSync), syncAdj(0), updateQueue(0) +{ +} + +void QmlTimeLinePrivate::add(QmlTimeLineObject &g, const Op &o) +{ + if (g._t && g._t != q) { + qWarning() << "QmlTimeLine: Cannot modify a QmlTimeLineValue owned by" + << "another timeline."; + return; + } + g._t = q; + + Ops::Iterator iter = ops.find(&g); + if (iter == ops.end()) { + iter = ops.insert(&g, TimeLine()); + if (syncPoint > 0) + q->pause(g, syncPoint); + } + if (!iter->ops.isEmpty() && + o.type == Op::Pause && + iter->ops.last().type == Op::Pause) { + iter->ops.last().length += o.length; + iter->length += o.length; + } else { + iter->ops.append(o); + iter->length += o.length; + } + + if (iter->length > length) + length = iter->length; + + if (!clockRunning) { + q->stop(); + prevTime = 0; + clockRunning = true; + + if (syncMode == QmlTimeLine::LocalSync) { + syncAdj = -1; + } else { + syncAdj = 0; + } + q->start(); +/* q->tick(0); + if (syncMode == QmlTimeLine::LocalSync) { + syncAdj = -1; + } else { + syncAdj = 0; + } + */ + } +} + +qreal QmlTimeLinePrivate::value(const Op &op, int time, qreal base, bool *changed) const +{ + Q_ASSERT(time >= 0); + Q_ASSERT(time <= op.length); + *changed = true; + + switch(op.type) { + case Op::Pause: + *changed = false; + return base; + case Op::Set: + return op.value; + case Op::Move: + if (time == 0) { + return base; + } else if (time == (op.length)) { + return op.value; + } else { + qreal delta = op.value - base; + qreal pTime = (qreal)(time) / (qreal)op.length; + if (op.easing.type() == QEasingCurve::Linear) + return base + delta * pTime; + else + return base + delta * op.easing.valueForProgress(pTime); + } + case Op::MoveBy: + if (time == 0) { + return base; + } else if (time == (op.length)) { + return base + op.value; + } else { + qreal delta = op.value; + qreal pTime = (qreal)(time) / (qreal)op.length; + if (op.easing.type() == QEasingCurve::Linear) + return base + delta * pTime; + else + return base + delta * op.easing.valueForProgress(pTime); + } + case Op::Accel: + if (time == 0) { + return base; + } else { + qreal t = (qreal)(time) / 1000.0f; + qreal delta = op.value * t + 0.5f * op.value2 * t * t; + return base + delta; + } + case Op::AccelDistance: + if (time == 0) { + return base; + } else if (time == (op.length)) { + return base + op.value2; + } else { + qreal t = (qreal)(time) / 1000.0f; + qreal accel = -1.0f * 1000.0f * op.value / (qreal)op.length; + qreal delta = op.value * t + 0.5f * accel * t * t; + return base + delta; + + } + case Op::Execute: + op.event.execute(); + *changed = false; + return -1; + } + + return base; +} + +/*! + \internal + \class QmlTimeLine + \ingroup group_animation + \brief The QmlTimeLine class provides a timeline for controlling animations. + + QmlTimeLine is similar to QTimeLine except: + \list + \i It updates QmlTimeLineValue instances directly, rather than maintaining a single + current value. + + For example, the following animates a simple value over 200 milliseconds: + \code + QmlTimeLineValue v(<starting value>); + QmlTimeLine tl; + tl.move(v, 100., 200); + tl.start() + \endcode + + If your program needs to know when values are changed, it can either + connect to the QmlTimeLine's updated() signal, or inherit from QmlTimeLineValue + and reimplement the QmlTimeLineValue::setValue() method. + + \i Supports multiple QmlTimeLineValue, arbitrary start and end values and allows + animations to be strung together for more complex effects. + + For example, the following animation moves the x and y coordinates of + an object from wherever they are to the position (100, 100) in 50 + milliseconds and then further animates them to (100, 200) in 50 + milliseconds: + + \code + QmlTimeLineValue x(<starting value>); + QmlTimeLineValue y(<starting value>); + + QmlTimeLine tl; + tl.start(); + + tl.move(x, 100., 50); + tl.move(y, 100., 50); + tl.move(y, 200., 50); + \endcode + + \i All QmlTimeLine instances share a single, synchronized clock. + + Actions scheduled within the same event loop tick are scheduled + synchronously against each other, regardless of the wall time between the + scheduling. Synchronized scheduling applies both to within the same + QmlTimeLine and across separate QmlTimeLine's within the same process. + + \endlist + + Currently easing functions are not supported. +*/ + + +/*! + Construct a new QmlTimeLine with the specified \a parent. +*/ +QmlTimeLine::QmlTimeLine(QObject *parent) +: QAbstractAnimation(parent) +{ + d = new QmlTimeLinePrivate(this); +} + +/*! + Destroys the time line. Any inprogress animations are canceled, but not + completed. +*/ +QmlTimeLine::~QmlTimeLine() +{ + for (QmlTimeLinePrivate::Ops::Iterator iter = d->ops.begin(); + iter != d->ops.end(); + ++iter) + iter.key()->_t = 0; + + delete d; d = 0; +} + +/*! + \enum QmlTimeLine::SyncMode + */ + +/*! + Return the timeline's synchronization mode. + */ +QmlTimeLine::SyncMode QmlTimeLine::syncMode() const +{ + return d->syncMode; +} + +/*! + Set the timeline's synchronization mode to \a syncMode. + */ +void QmlTimeLine::setSyncMode(SyncMode syncMode) +{ + d->syncMode = syncMode; +} + +/*! + Pause \a obj for \a time milliseconds. +*/ +void QmlTimeLine::pause(QmlTimeLineObject &obj, int time) +{ + if (time <= 0) return; + QmlTimeLinePrivate::Op op(QmlTimeLinePrivate::Op::Pause, time, 0., 0., d->order++); + d->add(obj, op); +} + +/*! + Execute the \a event. + */ +void QmlTimeLine::execute(const QmlTimeLineEvent &event) +{ + QmlTimeLinePrivate::Op op(QmlTimeLinePrivate::Op::Execute, 0, 0, 0., d->order++, event); + d->add(*event.eventObject(), op); +} + +/*! + Set the \a value of \a timeLineValue. +*/ +void QmlTimeLine::set(QmlTimeLineValue &timeLineValue, qreal value) +{ + QmlTimeLinePrivate::Op op(QmlTimeLinePrivate::Op::Set, 0, value, 0., d->order++); + d->add(timeLineValue, op); +} + +/*! + Decelerate \a timeLineValue from the starting \a velocity to zero at the + given \a acceleration rate. Although the \a acceleration is technically + a deceleration, it should always be positive. The QmlTimeLine will ensure + that the deceleration is in the opposite direction to the initial velocity. +*/ +int QmlTimeLine::accel(QmlTimeLineValue &timeLineValue, qreal velocity, qreal acceleration) +{ + if ((velocity > 0.0f) == (acceleration > 0.0f)) + acceleration = acceleration * -1.0f; + + int time = static_cast<int>(-1000 * velocity / acceleration); + + QmlTimeLinePrivate::Op op(QmlTimeLinePrivate::Op::Accel, time, velocity, acceleration, d->order++); + d->add(timeLineValue, op); + + return time; +} + +/*! + \overload + + Decelerate \a timeLineValue from the starting \a velocity to zero at the + given \a acceleration rate over a maximum distance of maxDistance. + + If necessary, QmlTimeLine will reduce the acceleration to ensure that the + entire operation does not require a move of more than \a maxDistance. + \a maxDistance should always be positive. +*/ +int QmlTimeLine::accel(QmlTimeLineValue &timeLineValue, qreal velocity, qreal acceleration, qreal maxDistance) +{ + Q_ASSERT(acceleration >= 0.0f && maxDistance >= 0.0f); + + qreal maxAccel = (velocity * velocity) / (2.0f * maxDistance); + if (maxAccel > acceleration) + acceleration = maxAccel; + + if ((velocity > 0.0f) == (acceleration > 0.0f)) + acceleration = acceleration * -1.0f; + + int time = static_cast<int>(-1000 * velocity / acceleration); + + QmlTimeLinePrivate::Op op(QmlTimeLinePrivate::Op::Accel, time, velocity, acceleration, d->order++); + d->add(timeLineValue, op); + + return time; +} + +/*! + Decelerate \a timeLineValue from the starting \a velocity to zero over the given + \a distance. This is like accel(), but the QmlTimeLine calculates the exact + deceleration to use. + + \a distance should be positive. +*/ +int QmlTimeLine::accelDistance(QmlTimeLineValue &timeLineValue, qreal velocity, qreal distance) +{ + if (distance == 0.0f || velocity == 0.0f) + return -1; + Q_ASSERT((distance >= 0.0f) == (velocity >= 0.0f)); + + int time = static_cast<int>(1000 * (2.0f * distance) / velocity); + + QmlTimeLinePrivate::Op op(QmlTimeLinePrivate::Op::AccelDistance, time, velocity, distance, d->order++); + d->add(timeLineValue, op); + + return time; +} + +/*! + Linearly change the \a timeLineValue from its current value to the given + \a destination value over \a time milliseconds. +*/ +void QmlTimeLine::move(QmlTimeLineValue &timeLineValue, qreal destination, int time) +{ + if (time <= 0) return; + QmlTimeLinePrivate::Op op(QmlTimeLinePrivate::Op::Move, time, destination, 0.0f, d->order++); + d->add(timeLineValue, op); +} + +/*! + Change the \a timeLineValue from its current value to the given \a destination + value over \a time milliseconds using the \a easing curve. + */ +void QmlTimeLine::move(QmlTimeLineValue &timeLineValue, qreal destination, const QEasingCurve &easing, int time) +{ + if (time <= 0) return; + QmlTimeLinePrivate::Op op(QmlTimeLinePrivate::Op::Move, time, destination, 0.0f, d->order++, QmlTimeLineEvent(), easing); + d->add(timeLineValue, op); +} + +/*! + Linearly change the \a timeLineValue from its current value by the \a change amount + over \a time milliseconds. +*/ +void QmlTimeLine::moveBy(QmlTimeLineValue &timeLineValue, qreal change, int time) +{ + if (time <= 0) return; + QmlTimeLinePrivate::Op op(QmlTimeLinePrivate::Op::MoveBy, time, change, 0.0f, d->order++); + d->add(timeLineValue, op); +} + +/*! + Change the \a timeLineValue from its current value by the \a change amount over + \a time milliseconds using the \a easing curve. + */ +void QmlTimeLine::moveBy(QmlTimeLineValue &timeLineValue, qreal change, const QEasingCurve &easing, int time) +{ + if (time <= 0) return; + QmlTimeLinePrivate::Op op(QmlTimeLinePrivate::Op::MoveBy, time, change, 0.0f, d->order++, QmlTimeLineEvent(), easing); + d->add(timeLineValue, op); +} + +/*! + Cancel (but don't complete) all scheduled actions for \a timeLineValue. +*/ +void QmlTimeLine::reset(QmlTimeLineValue &timeLineValue) +{ + if (!timeLineValue._t) + return; + if (timeLineValue._t != this) { + qWarning() << "QmlTimeLine: Cannot reset a QmlTimeLineValue owned by another timeline."; + return; + } + remove(&timeLineValue); + timeLineValue._t = 0; +} + +int QmlTimeLine::duration() const +{ + return -1; +} + +/*! + Synchronize the end point of \a timeLineValue to the endpoint of \a syncTo + within this timeline. + + Following operations on \a timeLineValue in this timeline will be scheduled after + all the currently scheduled actions on \a syncTo are complete. In + psuedo-code this is equivalent to: + \code + QmlTimeLine::pause(timeLineValue, min(0, length_of(syncTo) - length_of(timeLineValue))) + \endcode +*/ +void QmlTimeLine::sync(QmlTimeLineValue &timeLineValue, QmlTimeLineValue &syncTo) +{ + QmlTimeLinePrivate::Ops::Iterator iter = d->ops.find(&syncTo); + if (iter == d->ops.end()) + return; + int length = iter->length; + + iter = d->ops.find(&timeLineValue); + if (iter == d->ops.end()) { + pause(timeLineValue, length); + } else { + int glength = iter->length; + pause(timeLineValue, length - glength); + } +} + +/*! + Synchronize the end point of \a timeLineValue to the endpoint of the longest + action cursrently scheduled in the timeline. + + In psuedo-code, this is equivalent to: + \code + QmlTimeLine::pause(timeLineValue, length_of(timeline) - length_of(timeLineValue)) + \endcode +*/ +void QmlTimeLine::sync(QmlTimeLineValue &timeLineValue) +{ + QmlTimeLinePrivate::Ops::Iterator iter = d->ops.find(&timeLineValue); + if (iter == d->ops.end()) { + pause(timeLineValue, d->length); + } else { + pause(timeLineValue, d->length - iter->length); + } +} + +/* + Synchronize all currently and future scheduled values in this timeline to + the longest action currently scheduled. + + For example: + \code + value1->setValue(0.); + value2->setValue(0.); + value3->setValue(0.); + QmlTimeLine tl; + ... + tl.move(value1, 10, 200); + tl.move(value2, 10, 100); + tl.sync(); + tl.move(value2, 20, 100); + tl.move(value3, 20, 100); + \endcode + + will result in: + + \table + \header \o \o 0ms \o 50ms \o 100ms \o 150ms \o 200ms \o 250ms \o 300ms + \row \o value1 \o 0 \o 2.5 \o 5.0 \o 7.5 \o 10 \o 10 \o 10 + \row \o value2 \o 0 \o 5.0 \o 10.0 \o 10.0 \o 10.0 \o 15.0 \o 20.0 + \row \o value2 \o 0 \o 0 \o 0 \o 0 \o 0 \o 10.0 \o 20.0 + \endtable +*/ + +/*void QmlTimeLine::sync() +{ + for (QmlTimeLinePrivate::Ops::Iterator iter = d->ops.begin(); + iter != d->ops.end(); + ++iter) + pause(*iter.key(), d->length - iter->length); + d->syncPoint = d->length; +}*/ + +/*! + \internal + + Temporary hack. + */ +void QmlTimeLine::setSyncPoint(int sp) +{ + d->syncPoint = sp; +} + +/*! + \internal + + Temporary hack. + */ +int QmlTimeLine::syncPoint() const +{ + return d->syncPoint; +} + +/*! + Returns true if the timeline is active. An active timeline is one where + QmlTimeLineValue actions are still pending. +*/ +bool QmlTimeLine::isActive() const +{ + return !d->ops.isEmpty(); +} + +/*! + Completes the timeline. All queued actions are played to completion, and then discarded. For example, + \code + QmlTimeLineValue v(0.); + QmlTimeLine tl; + tl.move(v, 100., 1000.); + // 500 ms passes + // v.value() == 50. + tl.complete(); + // v.value() == 100. + \endcode +*/ +void QmlTimeLine::complete() +{ + d->advance(d->length); +} + +/*! + Resets the timeline. All queued actions are discarded and QmlTimeLineValue's retain their current value. For example, + \code + QmlTimeLineValue v(0.); + QmlTimeLine tl; + tl.move(v, 100., 1000.); + // 500 ms passes + // v.value() == 50. + tl.clear(); + // v.value() == 50. + \endcode +*/ +void QmlTimeLine::clear() +{ + for (QmlTimeLinePrivate::Ops::ConstIterator iter = d->ops.begin(); iter != d->ops.end(); ++iter) + iter.key()->_t = 0; + d->ops.clear(); + d->length = 0; + d->syncPoint = 0; + //XXX need stop here? +} + +int QmlTimeLine::time() const +{ + return d->prevTime; +} + +/*! + \fn void QmlTimeLine::updated() + + Emitted each time the timeline modifies QmlTimeLineValues. Even if multiple + QmlTimeLineValues are changed, this signal is only emitted once for each clock tick. +*/ + +void QmlTimeLine::updateCurrentTime(int v) +{ + if (d->syncAdj == -1) + d->syncAdj = v; + v -= d->syncAdj; + + int timeChanged = v - d->prevTime; +#if 0 + if (!timeChanged) + return; +#endif + d->prevTime = v; + d->advance(timeChanged); + emit updated(); + + // Do we need to stop the clock? + if (d->ops.isEmpty()) { + stop(); + d->prevTime = 0; + d->clockRunning = false; + emit completed(); + } /*else if (pauseTime > 0) { + GfxClock::cancelClock(); + d->prevTime = 0; + GfxClock::pauseFor(pauseTime); + d->syncAdj = 0; + d->clockRunning = false; + }*/ else if (/*!GfxClock::isActive()*/ state() != Running) { + stop(); + d->prevTime = 0; + d->clockRunning = true; + d->syncAdj = 0; + start(); + } +} + +bool operator<(const QPair<int, Update> &lhs, + const QPair<int, Update> &rhs) +{ + return lhs.first < rhs.first; +} + +int QmlTimeLinePrivate::advance(int t) +{ + int pauseTime = -1; + + // XXX - surely there is a more efficient way? + do { + pauseTime = -1; + // Minimal advance time + int advanceTime = t; + for (Ops::Iterator iter = ops.begin(); iter != ops.end(); ++iter) { + TimeLine &tl = *iter; + Op &op = tl.ops.first(); + int length = op.length - tl.consumedOpLength; + + if (length < advanceTime) { + advanceTime = length; + if (advanceTime == 0) + break; + } + } + t -= advanceTime; + + // Process until then. A zero length advance time will only process + // sets. + QList<QPair<int, Update> > updates; + + for (Ops::Iterator iter = ops.begin(); iter != ops.end(); ) { + QmlTimeLineValue *v = static_cast<QmlTimeLineValue *>(iter.key()); + TimeLine &tl = *iter; + Q_ASSERT(!tl.ops.isEmpty()); + + do { + Op &op = tl.ops.first(); + if (advanceTime == 0 && op.length != 0) + continue; + + if (tl.consumedOpLength == 0 && + op.type != Op::Pause && + op.type != Op::Execute) + tl.base = v->value(); + + if ((tl.consumedOpLength + advanceTime) == op.length) { + if (op.type == Op::Execute) { + updates << qMakePair(op.order, Update(op.event)); + } else { + bool changed = false; + qreal val = value(op, op.length, tl.base, &changed); + if (changed) + updates << qMakePair(op.order, Update(v, val)); + } + tl.length -= qMin(advanceTime, tl.length); + tl.consumedOpLength = 0; + tl.ops.removeFirst(); + } else { + tl.consumedOpLength += advanceTime; + bool changed = false; + qreal val = value(op, tl.consumedOpLength, tl.base, &changed); + if (changed) + updates << qMakePair(op.order, Update(v, val)); + tl.length -= qMin(advanceTime, tl.length); + break; + } + + } while(!tl.ops.isEmpty() && advanceTime == 0 && tl.ops.first().length == 0); + + + if (tl.ops.isEmpty()) { + iter = ops.erase(iter); + v->_t = 0; + } else { + if (tl.ops.first().type == Op::Pause && pauseTime != 0) { + int opPauseTime = tl.ops.first().length - tl.consumedOpLength; + if (pauseTime == -1 || opPauseTime < pauseTime) + pauseTime = opPauseTime; + } else { + pauseTime = 0; + } + ++iter; + } + } + + length -= qMin(length, advanceTime); + syncPoint -= advanceTime; + + qSort(updates.begin(), updates.end()); + updateQueue = &updates; + for (int ii = 0; ii < updates.count(); ++ii) { + const Update &v = updates.at(ii).second; + if (v.g) + v.g->setValue(v.v); + else + v.e.execute(); + } + updateQueue = 0; + } while(t); + + return pauseTime; +} + +void QmlTimeLine::remove(QmlTimeLineObject *v) +{ + QmlTimeLinePrivate::Ops::Iterator iter = d->ops.find(v); + Q_ASSERT(iter != d->ops.end()); + + int len = iter->length; + d->ops.erase(iter); + if (len == d->length) { + // We need to recalculate the length + d->length = 0; + for (QmlTimeLinePrivate::Ops::Iterator iter = d->ops.begin(); + iter != d->ops.end(); + ++iter) { + + if (iter->length > d->length) + d->length = iter->length; + + } + } + if (d->ops.isEmpty()) { + stop(); + d->clockRunning = false; + } else if (/*!GfxClock::isActive()*/ state() != Running) { + stop(); + d->prevTime = 0; + d->clockRunning = true; + + if (d->syncMode == QmlTimeLine::LocalSync) { + d->syncAdj = -1; + } else { + d->syncAdj = 0; + } + start(); + } + + if (d->updateQueue) { + for (int ii = 0; ii < d->updateQueue->count(); ++ii) { + if (d->updateQueue->at(ii).second.g == v || + d->updateQueue->at(ii).second.e.eventObject() == v) { + d->updateQueue->removeAt(ii); + --ii; + } + } + } + + +} + +/*! + \internal + \class QmlTimeLineValue + \ingroup group_animation + \brief The QmlTimeLineValue class provides a value that can be modified by QmlTimeLine. +*/ + +/*! + \fn QmlTimeLineValue::QmlTimeLineValue(qreal value = 0) + + Construct a new QmlTimeLineValue with an initial \a value. +*/ + +/*! + \fn qreal QmlTimeLineValue::value() const + + Return the current value. +*/ + +/*! + \fn void QmlTimeLineValue::setValue(qreal value) + + Set the current \a value. +*/ + +/*! + \fn QmlTimeLine *QmlTimeLineValue::timeLine() const + + If a QmlTimeLine is operating on this value, return a pointer to it, + otherwise return null. +*/ + + +QmlTimeLineObject::QmlTimeLineObject() +: _t(0) +{ +} + +QmlTimeLineObject::~QmlTimeLineObject() +{ + if (_t) { + _t->remove(this); + _t = 0; + } +} + +QmlTimeLineEvent::QmlTimeLineEvent() +: d0(0), d1(0), d2(0) +{ +} + +QmlTimeLineEvent::QmlTimeLineEvent(const QmlTimeLineEvent &o) +: d0(o.d0), d1(o.d1), d2(o.d2) +{ +} + +QmlTimeLineEvent &QmlTimeLineEvent::operator=(const QmlTimeLineEvent &o) +{ + d0 = o.d0; + d1 = o.d1; + d2 = o.d2; + return *this; +} + +void QmlTimeLineEvent::execute() const +{ + d0(d1); +} + +QmlTimeLineObject *QmlTimeLineEvent::eventObject() const +{ + return d2; +} + +QT_END_NAMESPACE |