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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "window.h"
++
++ Window::Window(QWidget *parent)
++ : QWidget(parent),
++ m_iconSize(64, 64)
++ {
++ m_ui.setupUi(this);
++ m_ui.easingCurvePicker->setIconSize(m_iconSize);
++ m_ui.easingCurvePicker->setMinimumHeight(m_iconSize.height() + 50);
++ m_ui.buttonGroup->setId(m_ui.lineRadio, 0);
++ m_ui.buttonGroup->setId(m_ui.circleRadio, 1);
++
++ QEasingCurve dummy;
++ m_ui.periodSpinBox->setValue(dummy.period());
++ m_ui.amplitudeSpinBox->setValue(dummy.amplitude());
++ m_ui.overshootSpinBox->setValue(dummy.overshoot());
++
++ connect(m_ui.easingCurvePicker, &QListWidget::currentRowChanged,
++ this, &Window::curveChanged);
++ connect(m_ui.buttonGroup, &QButtonGroup::buttonClicked,
++ this, &Window::pathChanged);
++ connect(m_ui.periodSpinBox, &QDoubleSpinBox::valueChanged,
++ this, &Window::periodChanged);
++ connect(m_ui.amplitudeSpinBox, &QDoubleSpinBox::valueChanged,
++ this, &Window::amplitudeChanged);
++ connect(m_ui.overshootSpinBox, &QDoubleSpinBox::valueChanged,
++ this, &Window::overshootChanged);
++ createCurveIcons();
++
++ QPixmap pix(QLatin1String(":/images/qt-logo.png"));
++ m_item = new PixmapItem(pix);
++ m_scene.addItem(m_item);
++ m_ui.graphicsView->setScene(&m_scene);
++
++ m_anim = new Animation(m_item, "pos", this);
++ m_anim->setEasingCurve(QEasingCurve::OutBounce);
++ m_ui.easingCurvePicker->setCurrentRow(int(QEasingCurve::OutBounce));
++
++ startAnimation();
++ }
++
++ static QEasingCurve createEasingCurve(QEasingCurve::Type curveType)
++ {
++ QEasingCurve curve(curveType);
++
++ if (curveType == QEasingCurve::BezierSpline) {
++ curve.addCubicBezierSegment(QPointF(0.4, 0.1), QPointF(0.6, 0.9), QPointF(1.0, 1.0));
++
++ } else if (curveType == QEasingCurve::TCBSpline) {
++ curve.addTCBSegment(QPointF(0.0, 0.0), 0, 0, 0);
++ curve.addTCBSegment(QPointF(0.3, 0.4), 0.2, 1, -0.2);
++ curve.addTCBSegment(QPointF(0.7, 0.6), -0.2, 1, 0.2);
++ curve.addTCBSegment(QPointF(1.0, 1.0), 0, 0, 0);
++ }
++
++ return curve;
++ }
++
++ void Window::createCurveIcons()
++ {
++ QPixmap pix(m_iconSize);
++ QPainter painter(&pix);
++ QLinearGradient gradient(0,0, 0, m_iconSize.height());
++ gradient.setColorAt(0.0, QColor(240, 240, 240));
++ gradient.setColorAt(1.0, QColor(224, 224, 224));
++ QBrush brush(gradient);
++ const QMetaObject &mo = QEasingCurve::staticMetaObject;
++ QMetaEnum metaEnum = mo.enumerator(mo.indexOfEnumerator("Type"));
++ // Skip QEasingCurve::Custom
++ for (int i = 0; i < QEasingCurve::NCurveTypes - 1; ++i) {
++ painter.fillRect(QRect(QPoint(0, 0), m_iconSize), brush);
++ QEasingCurve curve = createEasingCurve(static_cast<QEasingCurve::Type>(i));
++ painter.setPen(QColor(0, 0, 255, 64));
++ qreal xAxis = m_iconSize.height()/1.5;
++ qreal yAxis = m_iconSize.width()/3;
++ painter.drawLine(QLineF(0, xAxis, m_iconSize.width(), xAxis));
++ painter.drawLine(QLineF(yAxis, 0, yAxis, m_iconSize.height()));
++
++ qreal curveScale = m_iconSize.height()/2;
++
++ painter.setPen(Qt::NoPen);
++
++ // start point
++ painter.setBrush(Qt::red);
++ QPoint start(qRound(yAxis), qRound(xAxis - curveScale * curve.valueForProgress(0)));
++ painter.drawRect(start.x() - 1, start.y() - 1, 3, 3);
++
++ // end point
++ painter.setBrush(Qt::blue);
++ QPoint end(qRound(yAxis + curveScale), qRound(xAxis - curveScale * curve.valueForProgress(1)));
++ painter.drawRect(end.x() - 1, end.y() - 1, 3, 3);
++
++ QPainterPath curvePath;
++ curvePath.moveTo(start);
++ for (qreal t = 0; t <= 1.0; t+=1.0/curveScale) {
++ QPointF to;
++ to.setX(yAxis + curveScale * t);
++ to.setY(xAxis - curveScale * curve.valueForProgress(t));
++ curvePath.lineTo(to);
++ }
++ painter.setRenderHint(QPainter::Antialiasing, true);
++ painter.strokePath(curvePath, QColor(32, 32, 32));
++ painter.setRenderHint(QPainter::Antialiasing, false);
++ QListWidgetItem *item = new QListWidgetItem;
++ item->setIcon(QIcon(pix));
++ item->setText(metaEnum.key(i));
++ m_ui.easingCurvePicker->addItem(item);
++ }
++ }
++
++ void Window::startAnimation()
++ {
++ m_anim->setStartValue(QPointF(0, 0));
++ m_anim->setEndValue(QPointF(100, 100));
++ m_anim->setDuration(2000);
++ m_anim->setLoopCount(-1); // forever
++ m_anim->start();
++ }
++
++ void Window::curveChanged(int row)
++ {
++ QEasingCurve::Type curveType = static_cast<QEasingCurve::Type>(row);
++ m_anim->setEasingCurve(createEasingCurve(curveType));
++ m_anim->setCurrentTime(0);
++
++ bool isElastic = curveType >= QEasingCurve::InElastic && curveType <= QEasingCurve::OutInElastic;
++ bool isBounce = curveType >= QEasingCurve::InBounce && curveType <= QEasingCurve::OutInBounce;
++ m_ui.periodSpinBox->setEnabled(isElastic);
++ m_ui.amplitudeSpinBox->setEnabled(isElastic || isBounce);
++ m_ui.overshootSpinBox->setEnabled(curveType >= QEasingCurve::InBack && curveType <= QEasingCurve::OutInBack);
++ }
++
++ void Window::pathChanged(QAbstractButton *button)
++ {
++ const int index = m_ui.buttonGroup->id(button);
++ m_anim->setPathType(Animation::PathType(index));
++ }
++
++ void Window::periodChanged(double value)
++ {
++ QEasingCurve curve = m_anim->easingCurve();
++ curve.setPeriod(value);
++ m_anim->setEasingCurve(curve);
++ }
++
++ void Window::amplitudeChanged(double value)
++ {
++ QEasingCurve curve = m_anim->easingCurve();
++ curve.setAmplitude(value);
++ m_anim->setEasingCurve(curve);
++ }
++
++ void Window::overshootChanged(double value)
++ {
++ QEasingCurve curve = m_anim->easingCurve();
++ curve.setOvershoot(value);
++ m_anim->setEasingCurve(curve);
++ }
++