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Diffstat (limited to 'examples/animation/easing/animation.h')
-rw-r--r-- | examples/animation/easing/animation.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/examples/animation/easing/animation.h b/examples/animation/easing/animation.h new file mode 100644 index 0000000000..f0aef6560b --- /dev/null +++ b/examples/animation/easing/animation.h @@ -0,0 +1,100 @@ +/**************************************************************************** +** +** 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 QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef ANIMATION_H +#define ANIMATION_H + +#include <QtGui> + +#include <QtCore/qpropertyanimation.h> + +class Animation : public QPropertyAnimation { +public: + enum PathType { + LinearPath, + CirclePath, + NPathTypes + }; + Animation(QObject *target, const QByteArray &prop) + : QPropertyAnimation(target, prop) + { + setPathType(LinearPath); + } + + void setPathType(PathType pathType) + { + if (pathType >= NPathTypes) + qWarning("Unknown pathType %d", pathType); + + m_pathType = pathType; + m_path = QPainterPath(); + } + + void updateCurrentTime(int currentTime) + { + if (m_pathType == CirclePath) { + if (m_path.isEmpty()) { + QPointF to = endValue().toPointF(); + QPointF from = startValue().toPointF(); + m_path.moveTo(from); + m_path.addEllipse(QRectF(from, to)); + } + int dura = duration(); + const qreal progress = ((dura == 0) ? 1 : ((((currentTime - 1) % dura) + 1) / qreal(dura))); + + qreal easedProgress = easingCurve().valueForProgress(progress); + if (easedProgress > 1.0) { + easedProgress -= 1.0; + } else if (easedProgress < 0) { + easedProgress += 1.0; + } + QPointF pt = m_path.pointAtPercent(easedProgress); + updateCurrentValue(pt); + emit valueChanged(pt); + } else { + QPropertyAnimation::updateCurrentTime(currentTime); + } + } + + QPainterPath m_path; + PathType m_pathType; +}; + +#endif // ANIMATION_H |