qt-everywhere-src-5.15.1/qtbase/examples/widgets/animation/easing/window.cpp - orbit - Git at Google

 /****************************************************************************
 **
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** BSD License Usage
 ** Alternatively, 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 The Qt Company Ltd 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."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #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, QOverload<QAbstractButton *>::of(&QButtonGroup::buttonClicked),
             this, &Window::pathChanged);
     connect(m_ui.periodSpinBox, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
             this, &Window::periodChanged);
     connect(m_ui.amplitudeSpinBox, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
             this, &Window::amplitudeChanged);
     connect(m_ui.overshootSpinBox, QOverload<double>::of(&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");
     m_anim->setEasingCurve(QEasingCurve::OutBounce);
     m_ui.easingCurvePicker->setCurrentRow(int(QEasingCurve::OutBounce));

     startAnimation();
 }

 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((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(0, xAxis, m_iconSize.width(),  xAxis);
         painter.drawLine(yAxis, 0, yAxis, m_iconSize.height());

         qreal curveScale = m_iconSize.height()/2;

         painter.setPen(Qt::NoPen);

         // start point
         painter.setBrush(Qt::red);
         QPoint start(yAxis, xAxis - curveScale * curve.valueForProgress(0));
         painter.drawRect(start.x() - 1, start.y() - 1, 3, 3);

         // end point
         painter.setBrush(Qt::blue);
         QPoint end(yAxis + curveScale, 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) {
             QPoint 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 = (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);
 }
	/****************************************************************************
	**
	** Copyright (C) 2016 The Qt Company Ltd.
	** Contact: https://www.qt.io/licensing/
	**
	** This file is part of the QtCore module of the Qt Toolkit.
	**
	** $QT_BEGIN_LICENSE:BSD$
	** Commercial License Usage
	** Licensees holding valid commercial Qt licenses may use this file in
	** accordance with the commercial license agreement provided with the
	** Software or, alternatively, in accordance with the terms contained in
	** a written agreement between you and The Qt Company. For licensing terms
	** and conditions see https://www.qt.io/terms-conditions. For further
	** information use the contact form at https://www.qt.io/contact-us.
	**
	** BSD License Usage
	** Alternatively, 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 The Qt Company Ltd 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."
	**
	** $QT_END_LICENSE$
	**
	****************************************************************************/

	#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, QOverload<QAbstractButton *>::of(&QButtonGroup::buttonClicked),
	this, &Window::pathChanged);
	connect(m_ui.periodSpinBox, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
	this, &Window::periodChanged);
	connect(m_ui.amplitudeSpinBox, QOverload<double>::of(&QDoubleSpinBox::valueChanged),
	this, &Window::amplitudeChanged);
	connect(m_ui.overshootSpinBox, QOverload<double>::of(&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");
	m_anim->setEasingCurve(QEasingCurve::OutBounce);
	m_ui.easingCurvePicker->setCurrentRow(int(QEasingCurve::OutBounce));

	startAnimation();
	}

	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((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(0, xAxis, m_iconSize.width(), xAxis);
	painter.drawLine(yAxis, 0, yAxis, m_iconSize.height());

	qreal curveScale = m_iconSize.height()/2;

	painter.setPen(Qt::NoPen);

	// start point
	painter.setBrush(Qt::red);
	QPoint start(yAxis, xAxis - curveScale * curve.valueForProgress(0));
	painter.drawRect(start.x() - 1, start.y() - 1, 3, 3);

	// end point
	painter.setBrush(Qt::blue);
	QPoint end(yAxis + curveScale, 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) {
	QPoint 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 = (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);
	}