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Diffstat (limited to 'src/declarative/fx/qfxflipable.cpp')
| -rw-r--r-- | src/declarative/fx/qfxflipable.cpp | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/src/declarative/fx/qfxflipable.cpp b/src/declarative/fx/qfxflipable.cpp new file mode 100644 index 0000000..9db0b57 --- /dev/null +++ b/src/declarative/fx/qfxflipable.cpp @@ -0,0 +1,220 @@ +/**************************************************************************** +** +** 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 "qfxflipable.h" +#include "private/qfxitem_p.h" +#include "qfxtransform.h" +#include <QtDeclarative/qmlinfo.h> + +QML_DEFINE_TYPE(QFxFlipable,Flipable); + +class QFxFlipablePrivate : public QFxItemPrivate +{ +public: + QFxFlipablePrivate() : current(QFxFlipable::Front), front(0), back(0) {} + + QFxFlipable::Side current; + QFxItem *front; + QFxItem *back; +}; + +/*! + \qmlclass Flipable QFxFlipable + \brief The Flipable element provides a surface that can be flipped. + \inherits Item + + Flipable allows you to specify a front and a back and then flip between those sides. + + \code + <Flipable id="flipable" width="40" height="40"> + <transform> + <Axis id="axis" xStart="20" xEnd="20" yStart="20" yEnd="0" /> + </transform> + <front> + <Image file="front.png"/> + </front> + <back> + <Image file="back.png"/> + </back> + <states> + <State name="back"> + <SetProperty target="{axis}" property="rotation" value="180" /> + </State> + </states> + <transitions> + <Transition> + <NumericAnimation easing="easeInOutQuad" properties="rotation"/> + </Transition> + </transitions> + </Flipable> + \endcode + + \image flipable.gif +*/ + +/*! + \internal + \class QFxFlipable + \brief The QFxFlipable class provides a flipable surface. + + \ingroup group_widgets + + QFxFlipable allows you to specify a front and a back, as well as an + axis for the flip. +*/ + +QFxFlipable::QFxFlipable(QFxItem *parent) +: QFxItem(*(new QFxFlipablePrivate), parent) +{ +} + +QFxFlipable::~QFxFlipable() +{ +} + +/*! + \qmlproperty Item Flipable::front + \qmlproperty Item Flipable::back + + The front and back sides of the flipable. +*/ + +QFxItem *QFxFlipable::front() +{ + Q_D(const QFxFlipable); + return d->front; +} + +void QFxFlipable::setFront(QFxItem *front) +{ + Q_D(QFxFlipable); + if (d->front) { + qmlInfo(this) << "front is a write-once property"; + return; + } + d->front = front; + children()->append(d->front); + if (Back == d->current) + d->front->setOpacity(0.); +} + +QFxItem *QFxFlipable::back() +{ + Q_D(const QFxFlipable); + return d->back; +} + +void QFxFlipable::setBack(QFxItem *back) +{ + Q_D(QFxFlipable); + if (d->back) { + qmlInfo(this) << "back is a write-once property"; + return; + } + d->back = back; + children()->append(d->back); + if (Front == d->current) + d->back->setOpacity(0.); +} + +/*! + \qmlproperty enumeration Flipable::side + + The side of the Flippable currently visible. Possible values are \c + Front and \c Back. +*/ +QFxFlipable::Side QFxFlipable::side() const +{ + Q_D(const QFxFlipable); + return d->current; +} + +void QFxFlipable::transformChanged(const QSimpleCanvas::Matrix &trans) +{ + Q_D(QFxFlipable); + QPointF p1(0, 0); + QPointF p2(1, 0); + QPointF p3(1, 1); + + p1 = trans.map(p1); + p2 = trans.map(p2); + p3 = trans.map(p3); + + qreal cross = (p1.x() - p2.x()) * (p3.y() - p2.y()) - + (p1.y() - p2.y()) * (p3.x() - p2.x()); + + Side newSide; + if (cross > 0) { + newSide = Back; + } else { + newSide = Front; + } + + if (newSide != d->current) { + d->current = newSide; + if (d->current==Back) { + QSimpleCanvas::Matrix mat; +#ifdef QFX_RENDER_OPENGL + mat.translate(d->back->width()/2,d->back->height()/2, 0); + if (d->back->width() && p1.x() >= p2.x()) + mat.rotate(180, 0, 1, 0); + if (d->back->height() && p2.y() >= p3.y()) + mat.rotate(180, 1, 0, 0); + mat.translate(-d->back->width()/2,-d->back->height()/2, 0); +#else + mat.translate(d->back->width()/2,d->back->height()/2); + if (d->back->width() && p1.x() >= p2.x()) + mat.rotate(180, Qt::YAxis); + if (d->back->height() && p2.y() >= p3.y()) + mat.rotate(180, Qt::XAxis); + mat.translate(-d->back->width()/2,-d->back->height()/2); +#endif + d->back->setTransform(mat); + } + if (d->front) + d->front->setOpacity((d->current==Front)?1.:0.); + if (d->back) + d->back->setOpacity((d->current==Back)?1.:0.); + emit sideChanged(); + } +} + +QT_END_NAMESPACE |