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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);
}
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