/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtCore module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "window.h"+
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+
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Window::Window(QWidget *parent)+
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    : QWidget(parent), m_iconSize(64, 64)+
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{+
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    m_ui.setupUi(this);+
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    QButtonGroup *buttonGroup = qFindChild<QButtonGroup *>(this);     // ### workaround for uic in 4.4+
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    m_ui.easingCurvePicker->setIconSize(m_iconSize);+
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    m_ui.easingCurvePicker->setMinimumHeight(m_iconSize.height() + 50);+
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    buttonGroup->setId(m_ui.lineRadio, 0);+
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    buttonGroup->setId(m_ui.circleRadio, 1);+
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+
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    QEasingCurve dummy;+
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    m_ui.periodSpinBox->setValue(dummy.period());+
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    m_ui.amplitudeSpinBox->setValue(dummy.amplitude());+
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    m_ui.overshootSpinBox->setValue(dummy.overshoot());+
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+
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    connect(m_ui.easingCurvePicker, SIGNAL(currentRowChanged(int)), this, SLOT(curveChanged(int)));+
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    connect(buttonGroup, SIGNAL(buttonClicked(int)), this, SLOT(pathChanged(int)));+
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    connect(m_ui.periodSpinBox, SIGNAL(valueChanged(double)), this, SLOT(periodChanged(double)));+
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    connect(m_ui.amplitudeSpinBox, SIGNAL(valueChanged(double)), this, SLOT(amplitudeChanged(double)));+
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    connect(m_ui.overshootSpinBox, SIGNAL(valueChanged(double)), this, SLOT(overshootChanged(double)));+
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    createCurveIcons();+
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+
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    QPixmap pix(QLatin1String(":/images/qt-logo.png"));+
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    m_item = new PixmapItem(pix);+
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    m_scene.addItem(m_item);+
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    m_ui.graphicsView->setScene(&m_scene);+
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+
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    m_anim = new Animation(m_item, "pos");+
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    m_anim->setEasingCurve(QEasingCurve::OutBounce);+
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    m_ui.easingCurvePicker->setCurrentRow(int(QEasingCurve::OutBounce));+
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+
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    startAnimation();+
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}+
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+
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void Window::createCurveIcons()+
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{+
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    QPixmap pix(m_iconSize);+
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    QPainter painter(&pix);+
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    QLinearGradient gradient(0,0, 0, m_iconSize.height());+
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    gradient.setColorAt(0.0, QColor(240, 240, 240));+
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    gradient.setColorAt(1.0, QColor(224, 224, 224));+
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    QBrush brush(gradient);+
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    const QMetaObject &mo = QEasingCurve::staticMetaObject;+
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    QMetaEnum metaEnum = mo.enumerator(mo.indexOfEnumerator("Type"));+
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    // Skip QEasingCurve::Custom+
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    for (int i = 0; i < QEasingCurve::NCurveTypes - 1; ++i) {+
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        painter.fillRect(QRect(QPoint(0, 0), m_iconSize), brush);+
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        QEasingCurve curve((QEasingCurve::Type)i);+
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        painter.setPen(QColor(0, 0, 255, 64));+
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        qreal xAxis = m_iconSize.height()/1.5;+
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        qreal yAxis = m_iconSize.width()/3;+
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        painter.drawLine(0, xAxis, m_iconSize.width(),  xAxis);+
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        painter.drawLine(yAxis, 0, yAxis, m_iconSize.height());+
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+
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        qreal curveScale = m_iconSize.height()/2;+
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+
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        painter.setPen(Qt::NoPen);+
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+
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        // start point+
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        painter.setBrush(Qt::red);+
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        QPoint start(yAxis, xAxis - curveScale * curve.valueForProgress(0));+
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        painter.drawRect(start.x() - 1, start.y() - 1, 3, 3);+
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+
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        // end point+
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        painter.setBrush(Qt::blue);+
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        QPoint end(yAxis + curveScale, xAxis - curveScale * curve.valueForProgress(1));+
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        painter.drawRect(end.x() - 1, end.y() - 1, 3, 3);+
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+
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        QPainterPath curvePath;+
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        curvePath.moveTo(start);+
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        for (qreal t = 0; t <= 1.0; t+=1.0/curveScale) {+
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            QPoint to;+
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            to.setX(yAxis + curveScale * t);+
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            to.setY(xAxis - curveScale * curve.valueForProgress(t));+
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            curvePath.lineTo(to);+
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        }+
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        painter.setRenderHint(QPainter::Antialiasing, true);+
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        painter.strokePath(curvePath, QColor(32, 32, 32));+
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        painter.setRenderHint(QPainter::Antialiasing, false);+
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        QListWidgetItem *item = new QListWidgetItem;+
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        item->setIcon(QIcon(pix));+
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        item->setText(metaEnum.key(i));+
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        m_ui.easingCurvePicker->addItem(item);+
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    }+
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}+
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+
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void Window::startAnimation()+
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{+
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    m_anim->setStartValue(QPointF(0, 0));+
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    m_anim->setEndValue(QPointF(100, 100));+
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    m_anim->setDuration(2000);+
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    m_anim->setLoopCount(-1); // forever+
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    m_anim->start();+
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}+
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+
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void Window::curveChanged(int row)+
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{+
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    QEasingCurve::Type curveType = (QEasingCurve::Type)row;+
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    m_anim->setEasingCurve(curveType);+
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    m_anim->setCurrentTime(0);+
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+
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    bool isElastic = curveType >= QEasingCurve::InElastic && curveType <= QEasingCurve::OutInElastic;+
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    bool isBounce = curveType >= QEasingCurve::InBounce && curveType <= QEasingCurve::OutInBounce;+
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    m_ui.periodSpinBox->setEnabled(isElastic);+
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    m_ui.amplitudeSpinBox->setEnabled(isElastic || isBounce);+
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    m_ui.overshootSpinBox->setEnabled(curveType >= QEasingCurve::InBack && curveType <= QEasingCurve::OutInBack);+
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}+
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+
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void Window::pathChanged(int index)+
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{+
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    m_anim->setPathType((Animation::PathType)index);+
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}+
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+
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void Window::periodChanged(double value)+
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{+
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    QEasingCurve curve = m_anim->easingCurve();+
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    curve.setPeriod(value);+
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    m_anim->setEasingCurve(curve);+
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}+
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+
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void Window::amplitudeChanged(double value)+
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{+
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    QEasingCurve curve = m_anim->easingCurve();+
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    curve.setAmplitude(value);+
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    m_anim->setEasingCurve(curve);+
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}+
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+
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void Window::overshootChanged(double value)+
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{+
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    QEasingCurve curve = m_anim->easingCurve();+
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    curve.setOvershoot(value);+
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    m_anim->setEasingCurve(curve);+
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}+
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+
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