Say hello to QtQuick module

This change moves the QtQuick 2 types and C++ API (including
SceneGraph) to a new module (AKA library), QtQuick.

99% of this change is moving files from src/declarative to
src/quick, and from tests/auto/declarative to
tests/auto/qtquick2.

The loading of QtQuick 2 ("import QtQuick 2.0") is now delegated to
a plugin, src/imports/qtquick2, just like it's done for QtQuick 1.

All tools, examples, and tests that use QtQuick C++ API have gotten
"QT += quick" or "QT += quick-private" added to their .pro file.

A few additional internal QtDeclarative classes had to be exported
(via Q_DECLARATIVE_PRIVATE_EXPORT) since they're needed by the
QtQuick 2 implementation.

The old header locations (e.g. QtDeclarative/qquickitem.h) will
still be supported for some time, but will produce compile-time
warnings. (To avoid the QtQuick implementation using the
compatibility headers (since QtDeclarative's includepath comes
first), a few include statements were modified, e.g. from
"#include <qsgnode.h>" to "#include <QtQuick/qsgnode.h>".)

There's a change in qtbase that automatically adds QtQuick to the
module list if QtDeclarative is used. Together with the compatibility
headers, this should help reduce the migration pain for existing
projects.

In theory, simply getting an existing QtDeclarative-based project
to compile and link shouldn't require any changes for now -- but
porting to the new scheme is of course recommended, and will
eventually become mandatory.

Task-number: QTBUG-22889
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Change-Id: Ia52be9373172ba2f37e7623231ecb060316c96a7
Reviewed-by: Kent Hansen <kent.hansen@nokia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@nokia.com>

1 files changed, 462 insertions, 0 deletions

diff --git a/src/quick/util/qdeclarativespringanimation.cpp b/src/quick/util/qdeclarativespringanimation.cpp
new file mode 100644
index 0000000000..b0b12c7ba4
--- /dev/null
+++ b/src/quick/util/qdeclarativespringanimation.cpp
@@ -0,0 +1,462 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qdeclarativespringanimation_p.h"
+
+#include "qdeclarativeanimation_p_p.h"
+#include <private/qdeclarativeproperty_p.h>
+
+#include <QtCore/qdebug.h>
+
+#include <private/qobject_p.h>
+
+#include <limits.h>
+#include <math.h>
+
+QT_BEGIN_NAMESPACE
+
+
+class QDeclarativeSpringAnimationPrivate : public QDeclarativePropertyAnimationPrivate
+{
+    Q_DECLARE_PUBLIC(QDeclarativeSpringAnimation)
+public:
+
+
+    struct SpringAnimation {
+        SpringAnimation()
+            : currentValue(0), to(0), velocity(0), start(0), duration(0) {}
+        qreal currentValue;
+        qreal to;
+        qreal velocity;
+        int start;
+        int duration;
+    };
+    QHash<QDeclarativeProperty, SpringAnimation> activeAnimations;
+
+    qreal maxVelocity;
+    qreal velocityms;
+    int lastTime;
+    qreal mass;
+    qreal spring;
+    qreal damping;
+    qreal epsilon;
+    qreal modulus;
+
+    bool useMass : 1;
+    bool haveModulus : 1;
+
+    enum Mode {
+        Track,
+        Velocity,
+        Spring
+    };
+    Mode mode;
+
+    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();
+
+    typedef QTickAnimationProxy<QDeclarativeSpringAnimationPrivate, &QDeclarativeSpringAnimationPrivate::tick> Clock;
+    Clock *clock;
+};
+
+void QDeclarativeSpringAnimationPrivate::tick(int time)
+{
+    if (mode == Track) {
+        clock->stop();
+        return;
+    }
+    int elapsed = time - lastTime;
+    if (!elapsed)
+        return;
+
+    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) {
+        animation.currentValue = fmod(animation.currentValue, modulus);
+        srcVal = fmod(srcVal, modulus);
+    }
+    if (mode == Spring) {
+        // 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 - animation.currentValue;
+            if (haveModulus && qAbs(diff) > modulus / 2) {
+                if (diff < 0)
+                    diff += modulus;
+                else
+                    diff -= modulus;
+            }
+            if (useMass)
+                animation.velocity = animation.velocity + (spring * diff - damping * animation.velocity) / mass;
+            else
+                animation.velocity = animation.velocity + spring * diff - damping * animation.velocity;
+            if (maxVelocity > 0.) {
+                // limit velocity
+                if (animation.velocity > maxVelocity)
+                    animation.velocity = maxVelocity;
+                else if (animation.velocity < -maxVelocity)
+                    animation.velocity = -maxVelocity;
+            }
+            animation.currentValue += animation.velocity * 16.0 / 1000.0;
+            if (haveModulus) {
+                animation.currentValue = fmod(animation.currentValue, modulus);
+                if (animation.currentValue < 0.0)
+                    animation.currentValue += modulus;
+            }
+        }
+        if (qAbs(animation.velocity) < epsilon && qAbs(srcVal - animation.currentValue) < epsilon) {
+            animation.velocity = 0.0;
+            animation.currentValue = srcVal;
+            stop = true;
+        }
+    } else {
+        qreal moveBy = elapsed * velocityms;
+        qreal diff = srcVal - animation.currentValue;
+        if (haveModulus && qAbs(diff) > modulus / 2) {
+            if (diff < 0)
+                diff += modulus;
+            else
+                diff -= modulus;
+        }
+        if (diff > 0) {
+            animation.currentValue += moveBy;
+            if (haveModulus)
+                animation.currentValue = fmod(animation.currentValue, modulus);
+        } else {
+            animation.currentValue -= moveBy;
+            if (haveModulus && animation.currentValue < 0.0)
+                animation.currentValue = fmod(animation.currentValue, modulus) + modulus;
+        }
+        if (lastTime - animation.start >= animation.duration) {
+            animation.currentValue = animation.to;
+            stop = true;
+        }
+    }
+
+    qreal old_to = animation.to;
+
+    QDeclarativePropertyPrivate::write(property, animation.currentValue,
+                                       QDeclarativePropertyPrivate::BypassInterceptor |
+                                       QDeclarativePropertyPrivate::DontRemoveBinding);
+
+    return (stop && old_to == animation.to); // do not stop if we got restarted
+}
+
+void QDeclarativeSpringAnimationPrivate::updateMode()
+{
+    if (spring == 0. && maxVelocity == 0.)
+        mode = Track;
+    else if (spring > 0.)
+        mode = Spring;
+    else {
+        mode = Velocity;
+        QHash<QDeclarativeProperty, SpringAnimation>::iterator it;
+        for (it = activeAnimations.begin(); it != activeAnimations.end(); ++it) {
+            SpringAnimation &animation = *it;
+            animation.start = lastTime;
+            qreal dist = qAbs(animation.currentValue - animation.to);
+            if (haveModulus && dist > modulus / 2)
+                dist = modulus - fmod(dist, modulus);
+            animation.duration = dist / velocityms;
+        }
+    }
+}
+
+/*!
+    \qmlclass SpringAnimation QDeclarativeSpringAnimation
+    \inqmlmodule QtQuick 2
+    \ingroup qml-animation-transition
+    \inherits NumberAnimation
+
+    \brief The SpringAnimation element allows a property to track a value in a spring-like motion.
+
+    SpringAnimation mimics the oscillatory behavior of a spring, with the appropriate \l spring constant to
+    control the acceleration and the \l damping to control how quickly the effect dies away.
+
+    You can also limit the maximum \l velocity of the animation.
+
+    The following \l Rectangle moves to the position of the mouse using a
+    SpringAnimation when the mouse is clicked. The use of the \l Behavior
+    on the \c x and \c y values indicates that whenever these values are
+    changed, a SpringAnimation should be applied.
+
+    \snippet doc/src/snippets/declarative/springanimation.qml 0
+
+    Like any other animation element, a SpringAnimation can be applied in a
+    number of ways, including transitions, behaviors and property value
+    sources. The \l {QML Animation and Transitions} documentation shows a
+    variety of methods for creating animations.
+
+    \sa SmoothedAnimation, {QML Animation and Transitions}, {declarative/animation/basics}{Animation basics example}, {declarative/toys/clocks}{Clocks example}
+*/
+
+QDeclarativeSpringAnimation::QDeclarativeSpringAnimation(QObject *parent)
+: QDeclarativeNumberAnimation(*(new QDeclarativeSpringAnimationPrivate),parent)
+{
+    Q_D(QDeclarativeSpringAnimation);
+    d->clock = new QDeclarativeSpringAnimationPrivate::Clock(d, this);
+}
+
+QDeclarativeSpringAnimation::~QDeclarativeSpringAnimation()
+{
+}
+
+/*!
+    \qmlproperty real QtQuick2::SpringAnimation::velocity
+
+    This property holds the maximum velocity allowed when tracking the source.
+
+    The default value is 0 (no maximum velocity).
+*/
+
+qreal QDeclarativeSpringAnimation::velocity() const
+{
+    Q_D(const QDeclarativeSpringAnimation);
+    return d->maxVelocity;
+}
+
+void QDeclarativeSpringAnimation::setVelocity(qreal velocity)
+{
+    Q_D(QDeclarativeSpringAnimation);
+    d->maxVelocity = velocity;
+    d->velocityms = velocity / 1000.0;
+    d->updateMode();
+}
+
+/*!
+    \qmlproperty real QtQuick2::SpringAnimation::spring
+
+    This property describes how strongly the target is pulled towards the
+    source. The default value is 0 (that is, the spring-like motion is disabled).
+
+    The useful value range is 0 - 5.0.
+
+    When this property is set and the \l velocity value is greater than 0,
+    the \l velocity limits the maximum speed.
+*/
+qreal QDeclarativeSpringAnimation::spring() const
+{
+    Q_D(const QDeclarativeSpringAnimation);
+    return d->spring;
+}
+
+void QDeclarativeSpringAnimation::setSpring(qreal spring)
+{
+    Q_D(QDeclarativeSpringAnimation);
+    d->spring = spring;
+    d->updateMode();
+}
+
+/*!
+    \qmlproperty real QtQuick2::SpringAnimation::damping
+    This property holds the spring damping value.
+
+    This value describes how quickly the spring-like motion comes to rest.
+    The default value is 0.
+
+    The useful value range is 0 - 1.0. The lower the value, the faster it
+    comes to rest.
+*/
+qreal QDeclarativeSpringAnimation::damping() const
+{
+    Q_D(const QDeclarativeSpringAnimation);
+    return d->damping;
+}
+
+void QDeclarativeSpringAnimation::setDamping(qreal damping)
+{
+    Q_D(QDeclarativeSpringAnimation);
+    if (damping > 1.)
+        damping = 1.;
+
+    d->damping = damping;
+}
+
+
+/*!
+    \qmlproperty real QtQuick2::SpringAnimation::epsilon
+    This property holds the spring epsilon.
+
+    The epsilon is the rate and amount of change in the value which is close enough
+    to 0 to be considered equal to zero. This will depend on the usage of the value.
+    For pixel positions, 0.25 would suffice. For scale, 0.005 will suffice.
+
+    The default is 0.01. Tuning this value can provide small performance improvements.
+*/
+qreal QDeclarativeSpringAnimation::epsilon() const
+{
+    Q_D(const QDeclarativeSpringAnimation);
+    return d->epsilon;
+}
+
+void QDeclarativeSpringAnimation::setEpsilon(qreal epsilon)
+{
+    Q_D(QDeclarativeSpringAnimation);
+    d->epsilon = epsilon;
+}
+
+/*!
+    \qmlproperty real QtQuick2::SpringAnimation::modulus
+    This property holds the modulus value. The default value is 0.
+
+    Setting a \a modulus forces the target value to "wrap around" at the modulus.
+    For example, setting the modulus to 360 will cause a value of 370 to wrap around to 10.
+*/
+qreal QDeclarativeSpringAnimation::modulus() const
+{
+    Q_D(const QDeclarativeSpringAnimation);
+    return d->modulus;
+}
+
+void QDeclarativeSpringAnimation::setModulus(qreal modulus)
+{
+    Q_D(QDeclarativeSpringAnimation);
+    if (d->modulus != modulus) {
+        d->haveModulus = modulus != 0.0;
+        d->modulus = modulus;
+        d->updateMode();
+        emit modulusChanged();
+    }
+}
+
+/*!
+    \qmlproperty real QtQuick2::SpringAnimation::mass
+    This property holds the "mass" of the property being moved.
+
+    The value is 1.0 by default.
+
+    A greater mass causes slower movement and a greater spring-like
+    motion when an item comes to rest.
+*/
+qreal QDeclarativeSpringAnimation::mass() const
+{
+    Q_D(const QDeclarativeSpringAnimation);
+    return d->mass;
+}
+
+void QDeclarativeSpringAnimation::setMass(qreal mass)
+{
+    Q_D(QDeclarativeSpringAnimation);
+    if (d->mass != mass && mass > 0.0) {
+        d->useMass = mass != 1.0;
+        d->mass = mass;
+        emit massChanged();
+    }
+}
+
+void QDeclarativeSpringAnimation::transition(QDeclarativeStateActions &actions,
+                                             QDeclarativeProperties &modified,
+                                             TransitionDirection direction)
+{
+    Q_D(QDeclarativeSpringAnimation);
+    Q_UNUSED(direction);
+
+    if (d->clock->state() != QAbstractAnimation::Running) {
+        d->lastTime = 0;
+    }
+
+    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();
+            animation.start = d->lastTime;
+            if (d->fromIsDefined)
+                animation.currentValue = d->actions->at(i).fromValue.toReal();
+            else
+                animation.currentValue = property.read().toReal();
+            if (d->mode == QDeclarativeSpringAnimationPrivate::Velocity) {
+                qreal dist = qAbs(animation.currentValue - animation.to);
+                if (d->haveModulus && dist > d->modulus / 2)
+                    dist = d->modulus - fmod(dist, d->modulus);
+                animation.duration = dist / d->velocityms;
+            }
+        }
+    }
+}
+
+
+QAbstractAnimation *QDeclarativeSpringAnimation::qtAnimation()
+{
+    Q_D(QDeclarativeSpringAnimation);
+    return d->clock;
+}
+
+QT_END_NAMESPACE