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Diffstat (limited to 'src/declarative/timeline/gfxeasing.cpp')
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diff --git a/src/declarative/timeline/gfxeasing.cpp b/src/declarative/timeline/gfxeasing.cpp deleted file mode 100644 index 45b84eb..0000000 --- a/src/declarative/timeline/gfxeasing.cpp +++ /dev/null @@ -1,811 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). -** Contact: Qt Software Information (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 either Technology Preview License Agreement or the -** Beta Release License Agreement. -** -** 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 1.0, 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. -** -** If you are unsure which license is appropriate for your use, please -** contact the sales department at qt-sales@nokia.com. -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "gfxeasing.h" -#include <math.h> -#include <QHash> -#include <QPainter> -#include <QVariant> -#include <QDebug> -#include <QStringList> -#include <QMouseEvent> -#include "gfxtimeline.h" - - -QT_BEGIN_NAMESPACE -typedef QHash<QString, qreal> GfxEasingProperties; -class GfxEasingFunction -{ -public: - virtual ~GfxEasingFunction() {} - virtual float value(float t, float b, float c, float d) = 0; - virtual GfxEasingFunction *copy() const = 0; -}; - -#include "../3rdparty/easing.cpp" - -struct ElasticEase : public GfxEasingFunction -{ - enum Type { In, Out }; - ElasticEase(Type t) : _t(t), _p(0.0f), _a(0.0f) {} - - Type _t; - qreal _p; - qreal _a; - - GfxEasingFunction *copy() const - { - ElasticEase *rv = new ElasticEase(_t); - rv->_p = _p; - rv->_a = _a; - return rv; - } - - float value(float t, float b, float c, float d) - { - if (t==0) return b; - float t_adj = (float)t / (float)d; - if (t_adj==1) return b+c; - - qreal p = _p?_p:(d * 0.3f); - - qreal a; - qreal s; - - if(!_a || _a < ::fabs(c)) { - a = c; - s = p / 4.0f; - } else { - a = _a; - s = p / (2 * M_PI) * ::asin(c / a); - } - - if(_t == In) - t_adj -= 1.0f; - - return (a*::pow(2,-10*t_adj) * ::sin( (t_adj*d-s)*(2*M_PI)/p ) + c + b); - } -}; - -struct BounceEase : public GfxEasingFunction -{ - enum Type { In, Out }; - BounceEase(Type t) : _t(t), _a(-1.0) {} - - Type _t; - qreal _a; - - GfxEasingFunction *copy() const - { - BounceEase *rv = new BounceEase(_t); - rv->_t = _t; - rv->_a = _a; - return rv; - } - - float value(float t, float b, float c, float d) - { - if(In == _t) - return c - bounce(d - t, 0, c, d) + b; - else - return bounce(t, b, c, d); - } - - float bounce(float t, float b, float c, float d) - { - float t_adj = (float)t / (float)d; - float amp = (_a == -1.0)?c:_a; - if ((t_adj) < (1/2.75)) { - if(c == 0. && _a != -1.0) { - t_adj -= (0.5f/2.75f); - return -amp * (1. - (30.25*t_adj*t_adj)) + b; - } else { - return c*(7.5625*t_adj*t_adj) + b; - } - } else if (t_adj < (2/2.75)) { - t_adj -= (1.5f/2.75f); - return -amp * (1. - (7.5625*t_adj*t_adj + .75)) + (b + c); - } else if (t_adj < (2.5/2.75)) { - t_adj -= (2.25f/2.75f); - return -amp * (1. - (7.5625*t_adj*t_adj + .9375)) + (b + c); - } else { - t_adj -= (2.65f/2.75f); - return -amp * (1. - (7.5625*t_adj*t_adj + .984375)) + (b + c); - } - } -}; - -static GfxEasingFunction *easeInElasticC(const GfxEasingProperties &p) -{ - ElasticEase *rv = new ElasticEase(ElasticEase::In); - rv->_p = p[QLatin1String("period")]; - rv->_a = p[QLatin1String("amplitude")]; - return rv; -} - - -static GfxEasingFunction *easeOutElasticC(const GfxEasingProperties &p) -{ - ElasticEase *rv = new ElasticEase(ElasticEase::Out); - rv->_p = p[QLatin1String("period")]; - rv->_a = p[QLatin1String("amplitude")]; - return rv; -} - -static GfxEasingFunction *easeOutBounceC(const GfxEasingProperties &p) -{ - BounceEase *rv = new BounceEase(BounceEase::Out); - rv->_a = p[QLatin1String("amplitude")]; - return rv; -} - -static GfxEasingFunction *easeInBounceC(const GfxEasingProperties &p) -{ - BounceEase *rv = new BounceEase(BounceEase::Out); - rv->_a = p[QLatin1String("amplitude")]; - return rv; -} - - -struct SimpleConfig : public GfxEasingFunction -{ - GfxEasing::Function func; - - float value(float t, float b, float c, float d) - { - return func(t, b, c, d); - } - - GfxEasingFunction *copy() const - { - SimpleConfig *rv = new SimpleConfig; - rv->func = func; - return rv; - } -}; - -GfxEasing::Function curveToFunc(GfxEasing::Curve curve) -{ - switch(curve) - { - case GfxEasing::None: - return &easeNone; - case GfxEasing::InQuad: - return &easeInQuad; - case GfxEasing::OutQuad: - return &easeOutQuad; - case GfxEasing::InOutQuad: - return &easeInOutQuad; - case GfxEasing::OutInQuad: - return &easeOutInQuad; - case GfxEasing::InCubic: - return &easeInCubic; - case GfxEasing::OutCubic: - return &easeOutCubic; - case GfxEasing::InOutCubic: - return &easeInOutCubic; - case GfxEasing::OutInCubic: - return &easeOutInCubic; - case GfxEasing::InQuart: - return &easeInQuart; - case GfxEasing::OutQuart: - return &easeOutQuart; - case GfxEasing::InOutQuart: - return &easeInOutQuart; - case GfxEasing::OutInQuart: - return &easeOutInQuart; - case GfxEasing::InQuint: - return &easeInQuint; - case GfxEasing::OutQuint: - return &easeOutQuint; - case GfxEasing::InOutQuint: - return &easeInOutQuint; - case GfxEasing::OutInQuint: - return &easeOutInQuint; - case GfxEasing::InSine: - return &easeInSine; - case GfxEasing::OutSine: - return &easeOutSine; - case GfxEasing::InOutSine: - return &easeInOutSine; - case GfxEasing::OutInSine: - return &easeOutInSine; - case GfxEasing::InExpo: - return &easeInExpo; - case GfxEasing::OutExpo: - return &easeOutExpo; - case GfxEasing::InOutExpo: - return &easeInOutExpo; - case GfxEasing::OutInExpo: - return &easeOutInExpo; - case GfxEasing::InCirc: - return &easeInCirc; - case GfxEasing::OutCirc: - return &easeOutCirc; - case GfxEasing::InOutCirc: - return &easeInOutCirc; - case GfxEasing::OutInCirc: - return &easeOutInCirc; - case GfxEasing::InElastic: - return &easeInElastic; - case GfxEasing::OutElastic: - return &easeOutElastic; - case GfxEasing::InOutElastic: - return &easeInOutElastic; - case GfxEasing::OutInElastic: - return &easeOutInElastic; - case GfxEasing::InBack: - return &easeInBack; - case GfxEasing::OutBack: - return &easeOutBack; - case GfxEasing::InOutBack: - return &easeInOutBack; - case GfxEasing::OutInBack: - return &easeOutInBack; - case GfxEasing::InBounce: - return &easeInBounce; - case GfxEasing::OutBounce: - return &easeOutBounce; - case GfxEasing::InOutBounce: - return &easeInOutBounce; - case GfxEasing::OutInBounce: - return &easeOutInBounce; - default: - return 0; - }; -} - -struct NameFunctionMap : public QHash<QString, GfxEasing::Function> -{ - NameFunctionMap() - { - insert(QLatin1String("easeNone"), easeNone); - insert(QLatin1String("easeInQuad"), easeInQuad); - insert(QLatin1String("easeOutQuad"), easeOutQuad); - insert(QLatin1String("easeInOutQuad"), easeInOutQuad); - insert(QLatin1String("easeOutInQuad"), easeOutInQuad); - insert(QLatin1String("easeInCubic"), easeInCubic); - insert(QLatin1String("easeOutCubic"), easeOutCubic); - insert(QLatin1String("easeInOutCubic"), easeInOutCubic); - insert(QLatin1String("easeOutInCubic"), easeOutInCubic); - insert(QLatin1String("easeInQuart"), easeInQuart); - insert(QLatin1String("easeOutQuart"), easeOutQuart); - insert(QLatin1String("easeInOutQuart"), easeInOutQuart); - insert(QLatin1String("easeOutInQuart"), easeOutInQuart); - insert(QLatin1String("easeInQuint"), easeInQuint); - insert(QLatin1String("easeOutQuint"), easeOutQuint); - insert(QLatin1String("easeInOutQuint"), easeInOutQuint); - insert(QLatin1String("easeOutInQuint"), easeOutInQuint); - insert(QLatin1String("easeInSine"), easeInSine); - insert(QLatin1String("easeOutSine"), easeOutSine); - insert(QLatin1String("easeInOutSine"), easeInOutSine); - insert(QLatin1String("easeOutInSine"), easeOutInSine); - insert(QLatin1String("easeInExpo"), easeInExpo); - insert(QLatin1String("easeOutExpo"), easeOutExpo); - insert(QLatin1String("easeInOutExpo"), easeInOutExpo); - insert(QLatin1String("easeOutInExpo"), easeOutInExpo); - insert(QLatin1String("easeInCirc"), easeInCirc); - insert(QLatin1String("easeOutCirc"), easeOutCirc); - insert(QLatin1String("easeInOutCirc"), easeInOutCirc); - insert(QLatin1String("easeOutInCirc"), easeOutInCirc); - insert(QLatin1String("easeInElastic"), easeInElastic); - insert(QLatin1String("easeOutElastic"), easeOutElastic); - insert(QLatin1String("easeInOutElastic"), easeInOutElastic); - insert(QLatin1String("easeOutInElastic"), easeOutInElastic); - insert(QLatin1String("easeInBack"), easeInBack); - insert(QLatin1String("easeOutBack"), easeOutBack); - insert(QLatin1String("easeInOutBack"), easeInOutBack); - insert(QLatin1String("easeOutInBack"), easeOutInBack); - insert(QLatin1String("easeInBounce"), easeInBounce); - insert(QLatin1String("easeOutBounce"), easeOutBounce); - insert(QLatin1String("easeInOutBounce"), easeInOutBounce); - insert(QLatin1String("easeOutInBounce"), easeOutInBounce); - } -}; -Q_GLOBAL_STATIC(NameFunctionMap, nameFunctionMap); - -typedef GfxEasingFunction *(*ConfigurableFunction)(const GfxEasingProperties &); -struct ConfigFunctionMap : public QHash<QString, ConfigurableFunction> -{ - ConfigFunctionMap() - { - insert(QLatin1String("easeInElastic"), easeInElasticC); - insert(QLatin1String("easeOutElastic"), easeOutElasticC); - insert(QLatin1String("easeInBounce"), easeInBounceC); - insert(QLatin1String("easeOutBounce"), easeOutBounceC); - } -}; -Q_GLOBAL_STATIC(ConfigFunctionMap, configFunctionMap); - -/*! - \class GfxEasing - \ingroup group_animation - \brief The GfxEasing class provides easing curves for controlling animation. - - Easing curves describe a function that controls how a value changes over - time. Easing curves allow transitions from one value to another to appear - more natural than a simple linear motion would allow. The GfxEasing class - is usually used in conjunction with the GfxTimeLine class, but can be used - on its own. - - To calculate the value at a given time, the easing curve function requires - the starting value, the final value and the total time to change from the - starting to the final value. When using the GfxEasing class with - GfxTimeLine, these values are supplied by the GfxTimeLine. When using - the GfxEasing class on its own, the programmer must specify them using - the GfxEasing::setFrom(), GfxEasing::setTo() and GfxEasing::setLength() - methods, or by passing them explicitly to the GfxEasing::valueAt() method. - - For example, - \code - GfxEasing easing(GfxEasing::InOutQuad); - easing.setFrom(0); - easing.setTo(1000); - easing.setLength(1000); - - for(int milliseconds = 0; milliseconds < 1000; ++milliseconds) - qWarning() << "Value at" << milliseconds << "milliseconds is - << easing.valueAt(milliseconds); - \endcode - will print the value at each millisecond for an InOutQuad transition from - 0 to 1000 over 1 second. - - When using a GfxTimeLine, the values are communicated implicitly. - \code - GfxTimeLine timeline; - GfxValue value(0); - - timeline.move(value, 1000, GfxEasing(GfxEasing::InOutQuad), 1000); - \endcode - In this case, any values set using the previous setter methods would be - ignored. - */ - -/*! - \qmlproperty string NumericAnimation::easing - \brief the easing curve used for the transition. - - Available values are: - - \list - \i \e easeNone - Easing equation function for a simple linear tweening, with no easing. - \i \e easeInQuad - Easing equation function for a quadratic (t^2) easing in: accelerating from zero velocity. - \i \e easeOutQuad - Easing equation function for a quadratic (t^2) easing out: decelerating to zero velocity. - \i \e easeInOutQuad - Easing equation function for a quadratic (t^2) easing in/out: acceleration until halfway, then deceleration. - \i \e easeOutInQuad - Easing equation function for a quadratic (t^2) easing out/in: deceleration until halfway, then acceleration. - \i \e easeInCubic - Easing equation function for a cubic (t^3) easing in: accelerating from zero velocity. - \i \e easeOutCubic - Easing equation function for a cubic (t^3) easing out: decelerating from zero velocity. - \i \e easeInOutCubic - Easing equation function for a cubic (t^3) easing in/out: acceleration until halfway, then deceleration. - \i \e easeOutInCubic - Easing equation function for a cubic (t^3) easing out/in: deceleration until halfway, then acceleration. - \i \e easeInQuart - Easing equation function for a quartic (t^4) easing in: accelerating from zero velocity. - \i \e easeOutQuart - Easing equation function for a quartic (t^4) easing out: decelerating from zero velocity. - \i \e easeInOutQuart - Easing equation function for a quartic (t^4) easing in/out: acceleration until halfway, then deceleration. - \i \e easeOutInQuart - Easing equation function for a quartic (t^4) easing out/in: deceleration until halfway, then acceleration. - \i \e easeInQuint - Easing equation function for a quintic (t^5) easing in: accelerating from zero velocity. - \i \e easeOutQuint - Easing equation function for a quintic (t^5) easing out: decelerating from zero velocity. - \i \e easeInOutQuint - Easing equation function for a quintic (t^5) easing in/out: acceleration until halfway, then deceleration. - \i \e easeOutInQuint - Easing equation function for a quintic (t^5) easing out/in: deceleration until halfway, then acceleration. - \i \e easeInSine - Easing equation function for a sinusoidal (sin(t)) easing in: accelerating from zero velocity. - \i \e easeOutSine - Easing equation function for a sinusoidal (sin(t)) easing out: decelerating from zero velocity. - \i \e easeInOutSine - Easing equation function for a sinusoidal (sin(t)) easing in/out: acceleration until halfway, then deceleration. - \i \e easeOutInSine - Easing equation function for a sinusoidal (sin(t)) easing out/in: deceleration until halfway, then acceleration. - \i \e easeInExpo - Easing equation function for an exponential (2^t) easing in: accelerating from zero velocity. - \i \e easeOutExpo - Easing equation function for an exponential (2^t) easing out: decelerating from zero velocity. - \i \e easeInOutExpo - Easing equation function for an exponential (2^t) easing in/out: acceleration until halfway, then deceleration. - \i \e easeOutInExpo - Easing equation function for an exponential (2^t) easing out/in: deceleration until halfway, then acceleration. - \i \e easeInCirc - Easing equation function for a circular (sqrt(1-t^2)) easing in: accelerating from zero velocity. - \i \e easeOutCirc - Easing equation function for a circular (sqrt(1-t^2)) easing out: decelerating from zero velocity. - \i \e easeInOutCirc - Easing equation function for a circular (sqrt(1-t^2)) easing in/out: acceleration until halfway, then deceleration. - \i \e easeOutInCirc - Easing equation function for a circular (sqrt(1-t^2)) easing out/in: deceleration until halfway, then acceleration. - \i \e easeInElastic - Easing equation function for an elastic (exponentially decaying sine wave) easing in: accelerating from zero velocity. The peak amplitude can be set with the \i amplitude parameter, and the period of decay by the \i period parameter. - \i \e easeOutElastic - Easing equation function for an elastic (exponentially decaying sine wave) easing out: decelerating from zero velocity. The peak amplitude can be set with the \i amplitude parameter, and the period of decay by the \i period parameter. - \i \e easeInOutElastic - Easing equation function for an elastic (exponentially decaying sine wave) easing in/out: acceleration until halfway, then deceleration. - \i \e easeOutInElastic - Easing equation function for an elastic (exponentially decaying sine wave) easing out/in: deceleration until halfway, then acceleration. - \i \e easeInBack - Easing equation function for a back (overshooting cubic easing: (s+1)*t^3 - s*t^2) easing in: accelerating from zero velocity. - \i \e easeOutBack - Easing equation function for a back (overshooting cubic easing: (s+1)*t^3 - s*t^2) easing out: decelerating from zero velocity. - \i \e easeInOutBack - Easing equation function for a back (overshooting cubic easing: (s+1)*t^3 - s*t^2) easing in/out: acceleration until halfway, then deceleration. - \i \e easeOutInBack - Easing equation function for a back (overshooting cubic easing: (s+1)*t^3 - s*t^2) easing out/in: deceleration until halfway, then acceleration. - \i \e easeOutBounce - Easing equation function for a bounce (exponentially decaying parabolic bounce) easing out: decelerating from zero velocity. - \i \e easeInBounce - Easing equation function for a bounce (exponentially decaying parabolic bounce) easing in: accelerating from zero velocity. - \i \e easeInOutBounce - Easing equation function for a bounce (exponentially decaying parabolic bounce) easing in/out: acceleration until halfway, then deceleration. - \i \e easeOutInBounce - Easing equation function for a bounce (exponentially decaying parabolic bounce) easing out/in: deceleration until halfway, then acceleration. - \endlist -*/ - -/*! - \enum GfxEasing::Curve - - The type of easing curve. - - \value None - Easing equation function for a simple linear tweening, with no easing. - - \value InQuad - Easing equation function for a quadratic (t^2) easing in: accelerating from zero velocity. - - \value OutQuad - Easing equation function for a quadratic (t^2) easing out: decelerating to zero velocity. - - \value InOutQuad - Easing equation function for a quadratic (t^2) easing in/out: acceleration until halfway, then deceleration. - - \value OutInQuad - Easing equation function for a quadratic (t^2) easing out/in: deceleration until halfway, then acceleration. - - \value InCubic - Easing equation function for a cubic (t^3) easing in: accelerating from zero velocity. - - \value OutCubic - Easing equation function for a cubic (t^3) easing out: decelerating from zero velocity. - - \value InOutCubic - Easing equation function for a cubic (t^3) easing in/out: acceleration until halfway, then deceleration. - - \value OutInCubic - Easing equation function for a cubic (t^3) easing out/in: deceleration until halfway, then acceleration. - - \value InQuart - Easing equation function for a quartic (t^4) easing in: accelerating from zero velocity. - - \value OutQuart - Easing equation function for a quartic (t^4) easing out: decelerating from zero velocity. - - \value InOutQuart - Easing equation function for a quartic (t^4) easing in/out: acceleration until halfway, then deceleration. - - \value OutInQuart - Easing equation function for a quartic (t^4) easing out/in: deceleration until halfway, then acceleration. - - \value InQuint - Easing equation function for a quintic (t^5) easing in: accelerating from zero velocity. - - \value OutQuint - Easing equation function for a quintic (t^5) easing out: decelerating from zero velocity. - - \value InOutQuint - Easing equation function for a quintic (t^5) easing in/out: acceleration until halfway, then deceleration. - - \value OutInQuint - Easing equation function for a quintic (t^5) easing out/in: deceleration until halfway, then acceleration. - - \value InSine - Easing equation function for a sinusoidal (sin(t)) easing in: accelerating from zero velocity. - - \value OutSine - Easing equation function for a sinusoidal (sin(t)) easing out: decelerating from zero velocity. - - \value InOutSine - Easing equation function for a sinusoidal (sin(t)) easing in/out: acceleration until halfway, then deceleration. - - \value OutInSine - Easing equation function for a sinusoidal (sin(t)) easing out/in: deceleration until halfway, then acceleration. - - \value InExpo - Easing equation function for an exponential (2^t) easing in: accelerating from zero velocity. - - \value OutExpo - Easing equation function for an exponential (2^t) easing out: decelerating from zero velocity. - - \value InOutExpo - Easing equation function for an exponential (2^t) easing in/out: acceleration until halfway, then deceleration. - - \value OutInExpo - Easing equation function for an exponential (2^t) easing out/in: deceleration until halfway, then acceleration. - - \value InCirc - Easing equation function for a circular (sqrt(1-t^2)) easing in: accelerating from zero velocity. - - \value OutCirc - Easing equation function for a circular (sqrt(1-t^2)) easing out: decelerating from zero velocity. - - \value InOutCirc - Easing equation function for a circular (sqrt(1-t^2)) easing in/out: acceleration until halfway, then deceleration. - - \value OutInCirc - Easing equation function for a circular (sqrt(1-t^2)) easing out/in: deceleration until halfway, then acceleration. - - \value InElastic - Easing equation function for an elastic (exponentially decaying - sine wave) easing in: accelerating from zero velocity. The peak - amplitude can be set with the \e amplitude parameter, and the - period of decay by the \e period parameter. - - \value OutElastic - Easing equation function for an elastic (exponentially decaying - sine wave) easing out: decelerating from zero velocity. The peak - amplitude can be set with the \e amplitude parameter, and the - period of decay by the \e period parameter. - - \value InOutElastic - Easing equation function for an elastic (exponentially decaying sine wave) easing in/out: acceleration until halfway, then deceleration. - - \value OutInElastic - Easing equation function for an elastic (exponentially decaying sine wave) easing out/in: deceleration until halfway, then acceleration. - - \value InBack - Easing equation function for a back (overshooting cubic easing: (s+1)*t^3 - s*t^2) easing in: accelerating from zero velocity. - - \value OutBack - Easing equation function for a back (overshooting cubic easing: (s+1)*t^3 - s*t^2) easing out: decelerating from zero velocity. - - \value InOutBack - Easing equation function for a back (overshooting cubic easing: (s+1)*t^3 - s*t^2) easing in/out: acceleration until halfway, then deceleration. - - \value OutInBack - Easing equation function for a back (overshooting cubic easing: (s+1)*t^3 - s*t^2) easing out/in: deceleration until halfway, then acceleration. - - \value OutBounce - Easing equation function for a bounce (exponentially decaying parabolic bounce) easing out: decelerating from zero velocity. - - \value InBounce - Easing equation function for a bounce (exponentially decaying parabolic bounce) easing in: accelerating from zero velocity. - - \value InOutBounce - Easing equation function for a bounce (exponentially decaying parabolic bounce) easing in/out: acceleration until halfway, then deceleration. - - \value OutInBounce - Easing equation function for a bounce (exponentially decaying parabolic bounce) easing out/in: deceleration until halfway, then acceleration. -*/ - -/*! - Construct a linear easing object. This is equivalent to \c {GfxEasing(GfxEasing::None)}. - */ -GfxEasing::GfxEasing() -: _config(0), _func(&easeNone), _b(0.), _c(1.), _d(1.) -{ -} - -/*! - Construct an easing object with the given \a curve. - */ -GfxEasing::GfxEasing(Curve curve) -: _config(0), _func(0), _b(0.), _c(1.), _d(1.) -{ - _func = curveToFunc(curve); - if(!_func) { - qWarning("GfxEasing: Invalid curve type %d", curve); - _func = &easeNone; - } -} - -/*! - Construct an easing object with the given \a curve. If \a curve does not - describe a legal curve, a linear easing object is constructed. - - Curve names have the form - \c {ease<CurveName>[(<arg>: <arg value>[, <arg2>: <arg value>])]}. The - \e CurveName is equivalent to the GfxEasing::Curve enum name. Some more - advanced curves can take arguments to further refine their behaviour. Where - applicable, these parameters are described in the corresponding - GfxEasing::Curve value documentation. - - For example, - \code - GfxEasing easing("easeInOutQuad"); - GfxEasing easing2("easeInElastic(period: 5, amplitude: 100)"); - \endcode - */ -GfxEasing::GfxEasing(const QString &curve) -: _config(0), _func(&easeNone), _b(0.), _c(1.), _d(1.) -{ - if(curve.contains(QLatin1Char('('))) { - QString easeName = curve.trimmed(); - GfxEasingProperties prop; - if(!easeName.endsWith(QLatin1Char(')'))) { - qWarning("GfxEasing: Unmatched perenthesis in easing function '%s'", - curve.toLatin1().constData()); - return; - } - - int idx = easeName.indexOf(QLatin1Char('(')); - QString prop_str = - easeName.mid(idx + 1, easeName.length() - 1 - idx - 1); - easeName = easeName.left(idx); - - QStringList props = prop_str.split(QLatin1Char(',')); - foreach(QString str, props) { - int sep = str.indexOf(QLatin1Char(':')); - - if(sep == -1) { - qWarning("GfxEasing: Improperly specified property in easing function '%s'", - curve.toLatin1().constData()); - return; - } - - QString propName = str.left(sep).trimmed(); - bool isOk; - qreal propValue = str.mid(sep + 1).trimmed().toDouble(&isOk); - - if(propName.isEmpty() || !isOk) { - qWarning("GfxEasing: Improperly specified property in easing function '%s'", - curve.toLatin1().constData()); - return; - } - - prop.insert(propName, propValue); - } - - QHash<QString, ConfigurableFunction>::Iterator iter = - configFunctionMap()->find(easeName); - - if(iter != configFunctionMap()->end()) - _config = (*iter)(prop); - } else { - if(nameFunctionMap()->contains(curve)) - _func = *(nameFunctionMap()->find(curve)); - } - - if(!_func && !_config) { - qWarning("GfxEasing: Unknown easing curve '%s'", - curve.toLatin1().constData()); - _func = &easeNone; - } -} - -/*! - Construct a copy of \a other. - */ -GfxEasing::GfxEasing(const GfxEasing &other) -: _config(0), _func(other._func), _b(other._b), _c(other._c), _d(other._d) -{ - if(other._config) _config = other._config->copy(); -} - -/*! - Copy \a other. - */ -GfxEasing &GfxEasing::operator=(const GfxEasing &other) -{ - if(_config) { delete _config; _config = 0; } - if(other._config) _config = other._config->copy(); - - _func = other._func; - _b = other._b; - _c = other._c; - _d = other._d; - - return *this; -} - -/*! - Returns true if this is a linear easing object. - */ -bool GfxEasing::isLinear() const -{ - return !_config && _func == &easeNone; -} - -/*! - Return the starting value for the easing curve. By default this is 0. - */ -qreal GfxEasing::from() const -{ - return _b; -} - -/*! - Set the starting value for the easing curve to \a from. - */ -void GfxEasing::setFrom(qreal from) -{ - _b = from; -} - -/*! - Return the final value for the easing curve. By default this is 0. - */ -qreal GfxEasing::to() const -{ - return _c; -} - -/*! - Set the final value for the easing curve to \a to. - */ -void GfxEasing::setTo(qreal to) -{ - _c = to; -} - -/*! - Return the length of the easing curve, in milliseconds. By default this - is 1. - */ -qreal GfxEasing::length() const -{ - return _d; -} - -/*! - Set the \a length of the easing curve, in milliseconds. - */ -void GfxEasing::setLength(qreal length) -{ - Q_ASSERT(length > 0); - _d = length; -} - -/*! - Return the value for the easing curve at time \a t milliseconds, based on - the parameters returned by GfxEasing::from(), GfxEasing::to() and - GfxEasing::length(). - - \a t is clamped to (0, GfxEasing::length()). - */ -qreal GfxEasing::valueAt(qreal t) const -{ - if(t < 0) t = 0; - else if(t > length()) t = length(); - - if(_config) - return _config->value(t, _b, _c - _b, _d); - else - return _func(t, _b, _c - _b, _d); -} - -/* - Return the value for the easing curve at time \a t milliseconds, based on - the provided parameters \a from, \a to and \a length. The values returned - from the object's GfxEasing::from(), GfxEasing::to() and GfxEasing::length() - methods are ignored. - - \a t is clamped to (0, \a length). - */ -qreal GfxEasing::valueAt(qreal t, qreal from, qreal to, qreal length) const -{ - if(t < 0) t = 0; - else if(t > length) t = length; - - if(_config) - return _config->value(t, from, to - from, length); - else - return _func(t, from, to - from, length); -} - -/*! - \internal - */ -QStringList GfxEasing::curves() -{ - return nameFunctionMap()->keys(); -} - -QT_END_NAMESPACE |