qt-everywhere-src-5.14.1/qtquickcontrols2/src/imports/controls/qquickdefaultprogressbar.cpp - orbit - Git at Google

 /****************************************************************************
 **
 ** Copyright (C) 2017 The Qt Company Ltd.
 ** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL3$
 ** 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 http://www.qt.io/terms-conditions. For further
 ** information use the contact form at http://www.qt.io/contact-us.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU Lesser
 ** General Public License version 3 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.LGPLv3 included in the
 ** packaging of this file. Please review the following information to
 ** ensure the GNU Lesser General Public License version 3 requirements
 ** will be met: https://www.gnu.org/licenses/lgpl.html.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License version 2.0 or later 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 2.0 requirements will be
 ** met: http://www.gnu.org/licenses/gpl-2.0.html.
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include "qquickdefaultprogressbar_p.h"

 #include <QtCore/qeasingcurve.h>
 #include <QtQuick/private/qquickitem_p.h>
 #include <QtQuick/private/qsgadaptationlayer_p.h>
 #include <QtQuickControls2/private/qquickanimatednode_p.h>

 QT_BEGIN_NAMESPACE

 static const int Blocks = 4;
 static const int BlockWidth = 16;
 static const int BlockRestingSpacing = 4;
 static const int BlockMovingSpacing = 48;
 static const int BlockSpan = Blocks * (BlockWidth + BlockRestingSpacing) - BlockRestingSpacing;
 static const int TotalDuration = 4000;
 static const int SecondPhaseStart = TotalDuration * 0.4;
 static const int ThirdPhaseStart = TotalDuration * 0.6;

 static inline qreal blockStartX(int blockIndex)
 {
     return ((blockIndex + 1) * -BlockWidth) - (blockIndex * BlockMovingSpacing);
 }

 static inline qreal blockRestX(int blockIndex, qreal availableWidth)
 {
     const qreal spanRightEdgePos = availableWidth / 2 + BlockSpan / 2;
     return spanRightEdgePos - (blockIndex + 1) * BlockWidth - (blockIndex * BlockRestingSpacing);
 }

 static inline qreal blockEndX(int blockIndex, qreal availableWidth)
 {
     return availableWidth - blockStartX(Blocks - 1 - blockIndex) - BlockWidth;
 }

 class QQuickDefaultProgressBarNode : public QQuickAnimatedNode
 {
 public:
     QQuickDefaultProgressBarNode(QQuickDefaultProgressBar *item);

     void updateCurrentTime(int time) override;
     void sync(QQuickItem *item) override;

 private:
     bool m_indeterminate = false;
     qreal m_pixelsPerSecond = 0;
 };

 QQuickDefaultProgressBarNode::QQuickDefaultProgressBarNode(QQuickDefaultProgressBar *item)
     : QQuickAnimatedNode(item),
       m_pixelsPerSecond(item->width())
 {
     setLoopCount(Infinite);
     setDuration(TotalDuration);
 }

 void QQuickDefaultProgressBarNode::updateCurrentTime(int time)
 {
     QSGTransformNode *transformNode = static_cast<QSGTransformNode*>(firstChild());
     for (int i = 0; i < Blocks; ++i) {
         Q_ASSERT(transformNode->type() == QSGNode::TransformNodeType);

         QMatrix4x4 m;
         const qreal restX = blockRestX(i, m_pixelsPerSecond);
         const qreal timeInSeconds = time / 1000.0;

         if (time < SecondPhaseStart) {
             // Move into the resting position for the first phase.
             QEasingCurve easingCurve(QEasingCurve::InQuad);
             const qreal easedCompletion = easingCurve.valueForProgress(time / qreal(SecondPhaseStart));
             const qreal distance = m_pixelsPerSecond * (easedCompletion * (SecondPhaseStart / 1000.0));
             const qreal position = blockStartX(i) + distance;
             const qreal destination = restX;
             m.translate(qMin(position, destination), 0);
         } else if (time < ThirdPhaseStart) {
             // Stay in the same position for the second phase.
             m.translate(restX, 0);
         } else {
             // Move out of view for the third phase.
             const int thirdPhaseSubKickoff = (BlockMovingSpacing / m_pixelsPerSecond) * 1000;
             const int subphase = (time - ThirdPhaseStart) / thirdPhaseSubKickoff;
             // If we're not at this subphase yet, don't try to animate movement,
             // because it will be incorrect.
             if (subphase < i)
                 return;

             const qreal timeSinceSecondPhase = timeInSeconds - (ThirdPhaseStart / 1000.0);
             // We only want to start keeping track of time once our subphase has started,
             // otherwise we move too much because we account for time that has already elapsed.
             // For example, if we were 60 milliseconds into the third subphase:
             //
             //      0 ..... 1 ..... 2 ...
             //         100     100     60
             //
             // i == 0, timeSinceOurKickoff == 260
             // i == 1, timeSinceOurKickoff == 160
             // i == 2, timeSinceOurKickoff ==  60
             const qreal timeSinceOurKickoff = timeSinceSecondPhase - (thirdPhaseSubKickoff / 1000.0 * i);
             const qreal position = restX + (m_pixelsPerSecond * (timeSinceOurKickoff));
             const qreal destination = blockEndX(i, m_pixelsPerSecond);
             m.translate(qMin(position, destination), 0);
         }

         transformNode->setMatrix(m);

         transformNode = static_cast<QSGTransformNode*>(transformNode->nextSibling());
     }
 }

 void QQuickDefaultProgressBarNode::sync(QQuickItem *item)
 {
     QQuickDefaultProgressBar *bar = static_cast<QQuickDefaultProgressBar *>(item);
     if (m_indeterminate != bar->isIndeterminate()) {
         m_indeterminate = bar->isIndeterminate();
         if (m_indeterminate)
             start();
         else
             stop();
     }
     m_pixelsPerSecond = item->width();

     QQuickItemPrivate *d = QQuickItemPrivate::get(item);

     QMatrix4x4 m;
     m.translate(0, (item->height() - item->implicitHeight()) / 2);
     setMatrix(m);

     if (m_indeterminate) {
         if (childCount() != Blocks) {
             // This was previously a regular progress bar; remove the old nodes.
             removeAllChildNodes();
         }

         QSGTransformNode *transformNode = static_cast<QSGTransformNode*>(firstChild());
         for (int i = 0; i < Blocks; ++i) {
             if (!transformNode) {
                 transformNode = new QSGTransformNode;
                 appendChildNode(transformNode);
             }

             QSGInternalRectangleNode *rectNode = static_cast<QSGInternalRectangleNode*>(transformNode->firstChild());
             if (!rectNode) {
                 rectNode = d->sceneGraphContext()->createInternalRectangleNode();
                 rectNode->setColor(bar->color());
                 transformNode->appendChildNode(rectNode);
             }

             QMatrix4x4 m;
             m.translate(blockStartX(i), 0);
             transformNode->setMatrix(m);

             rectNode->setRect(QRectF(QPointF(0, 0), QSizeF(BlockWidth, item->implicitHeight())));
             rectNode->update();

             transformNode = static_cast<QSGTransformNode *>(transformNode->nextSibling());
         }
     } else {
         if (childCount() > 1) {
             // This was previously an indeterminate progress bar; remove the old nodes.
             removeAllChildNodes();
         }

         QSGInternalRectangleNode *rectNode = static_cast<QSGInternalRectangleNode *>(firstChild());
         if (!rectNode) {
             rectNode = d->sceneGraphContext()->createInternalRectangleNode();
             rectNode->setColor(bar->color());
             appendChildNode(rectNode);
         }

         rectNode->setRect(QRectF(QPointF(0, 0), QSizeF(bar->progress() * item->width(), item->implicitHeight())));
         rectNode->update();
     }
 }

 QQuickDefaultProgressBar::QQuickDefaultProgressBar(QQuickItem *parent) :
     QQuickItem(parent)
 {
     setFlag(ItemHasContents);
 }

 qreal QQuickDefaultProgressBar::progress() const
 {
     return m_progress;
 }

 void QQuickDefaultProgressBar::setProgress(qreal progress)
 {
     if (progress == m_progress)
         return;

     m_progress = progress;
     update();
 }

 bool QQuickDefaultProgressBar::isIndeterminate() const
 {
     return m_indeterminate;
 }

 void QQuickDefaultProgressBar::setIndeterminate(bool indeterminate)
 {
     if (indeterminate == m_indeterminate)
         return;

     m_indeterminate = indeterminate;
     setClip(m_indeterminate);
     update();
 }

 QColor QQuickDefaultProgressBar::color() const
 {
     return m_color;
 }

 void QQuickDefaultProgressBar::setColor(const QColor &color)
 {
     if (color == m_color)
         return;

     m_color = color;
     update();
 }

 void QQuickDefaultProgressBar::itemChange(QQuickItem::ItemChange change, const QQuickItem::ItemChangeData &data)
 {
     QQuickItem::itemChange(change, data);
     if (change == ItemVisibleHasChanged)
         update();
 }

 QSGNode *QQuickDefaultProgressBar::updatePaintNode(QSGNode *oldNode, QQuickItem::UpdatePaintNodeData *)
 {
     QQuickDefaultProgressBarNode *node = static_cast<QQuickDefaultProgressBarNode *>(oldNode);
     if (isVisible() && width() > 0 && height() > 0) {
         if (!node)
             node = new QQuickDefaultProgressBarNode(this);
         node->sync(this);
     } else {
         delete node;
         node = nullptr;
     }
     return node;
 }

 QT_END_NAMESPACE
	/****************************************************************************
	**
	** Copyright (C) 2017 The Qt Company Ltd.
	** Contact: http://www.qt.io/licensing/
	**
	** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit.
	**
	** $QT_BEGIN_LICENSE:LGPL3$
	** 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 http://www.qt.io/terms-conditions. For further
	** information use the contact form at http://www.qt.io/contact-us.
	**
	** GNU Lesser General Public License Usage
	** Alternatively, this file may be used under the terms of the GNU Lesser
	** General Public License version 3 as published by the Free Software
	** Foundation and appearing in the file LICENSE.LGPLv3 included in the
	** packaging of this file. Please review the following information to
	** ensure the GNU Lesser General Public License version 3 requirements
	** will be met: https://www.gnu.org/licenses/lgpl.html.
	**
	** GNU General Public License Usage
	** Alternatively, this file may be used under the terms of the GNU
	** General Public License version 2.0 or later 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 2.0 requirements will be
	** met: http://www.gnu.org/licenses/gpl-2.0.html.
	**
	** $QT_END_LICENSE$
	**
	****************************************************************************/

	#include "qquickdefaultprogressbar_p.h"

	#include <QtCore/qeasingcurve.h>
	#include <QtQuick/private/qquickitem_p.h>
	#include <QtQuick/private/qsgadaptationlayer_p.h>
	#include <QtQuickControls2/private/qquickanimatednode_p.h>

	QT_BEGIN_NAMESPACE

	static const int Blocks = 4;
	static const int BlockWidth = 16;
	static const int BlockRestingSpacing = 4;
	static const int BlockMovingSpacing = 48;
	static const int BlockSpan = Blocks * (BlockWidth + BlockRestingSpacing) - BlockRestingSpacing;
	static const int TotalDuration = 4000;
	static const int SecondPhaseStart = TotalDuration * 0.4;
	static const int ThirdPhaseStart = TotalDuration * 0.6;

	static inline qreal blockStartX(int blockIndex)
	{
	return ((blockIndex + 1) * -BlockWidth) - (blockIndex * BlockMovingSpacing);
	}

	static inline qreal blockRestX(int blockIndex, qreal availableWidth)
	{
	const qreal spanRightEdgePos = availableWidth / 2 + BlockSpan / 2;
	return spanRightEdgePos - (blockIndex + 1) * BlockWidth - (blockIndex * BlockRestingSpacing);
	}

	static inline qreal blockEndX(int blockIndex, qreal availableWidth)
	{
	return availableWidth - blockStartX(Blocks - 1 - blockIndex) - BlockWidth;
	}

	class QQuickDefaultProgressBarNode : public QQuickAnimatedNode
	{
	public:
	QQuickDefaultProgressBarNode(QQuickDefaultProgressBar *item);

	void updateCurrentTime(int time) override;
	void sync(QQuickItem *item) override;

	private:
	bool m_indeterminate = false;
	qreal m_pixelsPerSecond = 0;
	};

	QQuickDefaultProgressBarNode::QQuickDefaultProgressBarNode(QQuickDefaultProgressBar *item)
	: QQuickAnimatedNode(item),
	m_pixelsPerSecond(item->width())
	{
	setLoopCount(Infinite);
	setDuration(TotalDuration);
	}

	void QQuickDefaultProgressBarNode::updateCurrentTime(int time)
	{
	QSGTransformNode transformNode = static_cast<QSGTransformNode>(firstChild());
	for (int i = 0; i < Blocks; ++i) {
	Q_ASSERT(transformNode->type() == QSGNode::TransformNodeType);

	QMatrix4x4 m;
	const qreal restX = blockRestX(i, m_pixelsPerSecond);
	const qreal timeInSeconds = time / 1000.0;

	if (time < SecondPhaseStart) {
	// Move into the resting position for the first phase.
	QEasingCurve easingCurve(QEasingCurve::InQuad);
	const qreal easedCompletion = easingCurve.valueForProgress(time / qreal(SecondPhaseStart));
	const qreal distance = m_pixelsPerSecond * (easedCompletion * (SecondPhaseStart / 1000.0));
	const qreal position = blockStartX(i) + distance;
	const qreal destination = restX;
	m.translate(qMin(position, destination), 0);
	} else if (time < ThirdPhaseStart) {
	// Stay in the same position for the second phase.
	m.translate(restX, 0);
	} else {
	// Move out of view for the third phase.
	const int thirdPhaseSubKickoff = (BlockMovingSpacing / m_pixelsPerSecond) * 1000;
	const int subphase = (time - ThirdPhaseStart) / thirdPhaseSubKickoff;
	// If we're not at this subphase yet, don't try to animate movement,
	// because it will be incorrect.
	if (subphase < i)
	return;

	const qreal timeSinceSecondPhase = timeInSeconds - (ThirdPhaseStart / 1000.0);
	// We only want to start keeping track of time once our subphase has started,
	// otherwise we move too much because we account for time that has already elapsed.
	// For example, if we were 60 milliseconds into the third subphase:
	//
	// 0 ..... 1 ..... 2 ...
	// 100 100 60
	//
	// i == 0, timeSinceOurKickoff == 260
	// i == 1, timeSinceOurKickoff == 160
	// i == 2, timeSinceOurKickoff == 60
	const qreal timeSinceOurKickoff = timeSinceSecondPhase - (thirdPhaseSubKickoff / 1000.0 * i);
	const qreal position = restX + (m_pixelsPerSecond * (timeSinceOurKickoff));
	const qreal destination = blockEndX(i, m_pixelsPerSecond);
	m.translate(qMin(position, destination), 0);
	}

	transformNode->setMatrix(m);

	transformNode = static_cast<QSGTransformNode*>(transformNode->nextSibling());
	}
	}

	void QQuickDefaultProgressBarNode::sync(QQuickItem *item)
	{
	QQuickDefaultProgressBar bar = static_cast<QQuickDefaultProgressBar >(item);
	if (m_indeterminate != bar->isIndeterminate()) {
	m_indeterminate = bar->isIndeterminate();
	if (m_indeterminate)
	start();
	else
	stop();
	}
	m_pixelsPerSecond = item->width();

	QQuickItemPrivate *d = QQuickItemPrivate::get(item);

	QMatrix4x4 m;
	m.translate(0, (item->height() - item->implicitHeight()) / 2);
	setMatrix(m);

	if (m_indeterminate) {
	if (childCount() != Blocks) {
	// This was previously a regular progress bar; remove the old nodes.
	removeAllChildNodes();
	}

	QSGTransformNode transformNode = static_cast<QSGTransformNode>(firstChild());
	for (int i = 0; i < Blocks; ++i) {
	if (!transformNode) {
	transformNode = new QSGTransformNode;
	appendChildNode(transformNode);
	}

	QSGInternalRectangleNode rectNode = static_cast<QSGInternalRectangleNode>(transformNode->firstChild());
	if (!rectNode) {
	rectNode = d->sceneGraphContext()->createInternalRectangleNode();
	rectNode->setColor(bar->color());
	transformNode->appendChildNode(rectNode);
	}

	QMatrix4x4 m;
	m.translate(blockStartX(i), 0);
	transformNode->setMatrix(m);

	rectNode->setRect(QRectF(QPointF(0, 0), QSizeF(BlockWidth, item->implicitHeight())));
	rectNode->update();

	transformNode = static_cast<QSGTransformNode *>(transformNode->nextSibling());
	}
	} else {
	if (childCount() > 1) {
	// This was previously an indeterminate progress bar; remove the old nodes.
	removeAllChildNodes();
	}

	QSGInternalRectangleNode rectNode = static_cast<QSGInternalRectangleNode >(firstChild());
	if (!rectNode) {
	rectNode = d->sceneGraphContext()->createInternalRectangleNode();
	rectNode->setColor(bar->color());
	appendChildNode(rectNode);
	}

	rectNode->setRect(QRectF(QPointF(0, 0), QSizeF(bar->progress() * item->width(), item->implicitHeight())));
	rectNode->update();
	}
	}

	QQuickDefaultProgressBar::QQuickDefaultProgressBar(QQuickItem *parent) :
	QQuickItem(parent)
	{
	setFlag(ItemHasContents);
	}

	qreal QQuickDefaultProgressBar::progress() const
	{
	return m_progress;
	}

	void QQuickDefaultProgressBar::setProgress(qreal progress)
	{
	if (progress == m_progress)
	return;

	m_progress = progress;
	update();
	}

	bool QQuickDefaultProgressBar::isIndeterminate() const
	{
	return m_indeterminate;
	}

	void QQuickDefaultProgressBar::setIndeterminate(bool indeterminate)
	{
	if (indeterminate == m_indeterminate)
	return;

	m_indeterminate = indeterminate;
	setClip(m_indeterminate);
	update();
	}

	QColor QQuickDefaultProgressBar::color() const
	{
	return m_color;
	}

	void QQuickDefaultProgressBar::setColor(const QColor &color)
	{
	if (color == m_color)
	return;

	m_color = color;
	update();
	}

	void QQuickDefaultProgressBar::itemChange(QQuickItem::ItemChange change, const QQuickItem::ItemChangeData &data)
	{
	QQuickItem::itemChange(change, data);
	if (change == ItemVisibleHasChanged)
	update();
	}

	QSGNode QQuickDefaultProgressBar::updatePaintNode(QSGNode oldNode, QQuickItem::UpdatePaintNodeData *)
	{
	QQuickDefaultProgressBarNode node = static_cast<QQuickDefaultProgressBarNode >(oldNode);
	if (isVisible() && width() > 0 && height() > 0) {
	if (!node)
	node = new QQuickDefaultProgressBarNode(this);
	node->sync(this);
	} else {
	delete node;
	node = nullptr;
	}
	return node;
	}

	QT_END_NAMESPACE