Revision control
++ // Copyright (C) 2017 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++ // Qt-Security score:significant reason:default
++
++ #include "qquickbasicprogressbar_p.h"
++
++ #include <QtCore/qeasingcurve.h>
++ #include <QtQuick/private/qquickitem_p.h>
++ #include <QtQuick/private/qsgadaptationlayer_p.h>
++ #include <QtQuickControls2Impl/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 QbpbTotalDuration = 4000;
++ static const int SecondPhaseStart = QbpbTotalDuration * 0.4;
++ static const int ThirdPhaseStart = QbpbTotalDuration * 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 / 2.0;
++ return spanRightEdgePos - (blockIndex + 1) * BlockWidth - (blockIndex * BlockRestingSpacing);
++ }
++
++ static inline qreal blockEndX(int blockIndex, qreal availableWidth)
++ {
++ return availableWidth - blockStartX(Blocks - 1 - blockIndex) - BlockWidth;
++ }
++
++ class QQuickBasicProgressBarNode : public QQuickAnimatedNode
++ {
++ public:
++ QQuickBasicProgressBarNode(QQuickBasicProgressBar *item);
++
++ void updateCurrentTime(int time) override;
++ void sync(QQuickItem *item) override;
++
++ private:
++ bool m_indeterminate = false;
++ qreal m_pixelsPerSecond = 0;
++ };
++
++ QQuickBasicProgressBarNode::QQuickBasicProgressBarNode(QQuickBasicProgressBar *item)
++ : QQuickAnimatedNode(item),
++ m_pixelsPerSecond(item->width())
++ {
++ setLoopCount(Infinite);
++ setDuration(QbpbTotalDuration);
++ }
++
++ void QQuickBasicProgressBarNode::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 QQuickBasicProgressBarNode::sync(QQuickItem *item)
++ {
++ QQuickBasicProgressBar *bar = static_cast<QQuickBasicProgressBar *>(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();
++ transformNode->appendChildNode(rectNode);
++ }
++
++ QMatrix4x4 m;
++ m.translate(blockStartX(i), 0);
++ transformNode->setMatrix(m);
++
++ // Set the color here too in case it was set after component completion,
++ // as updateCurrentTime doesn't sync it.
++ rectNode->setColor(bar->color());
++ 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();
++ appendChildNode(rectNode);
++ }
++
++ // Always set the color, not just when creating the rectangle node, so that we respect
++ // changes that are made after component completion.
++ rectNode->setColor(bar->color());
++ rectNode->setRect(QRectF(QPointF(0, 0), QSizeF(bar->progress() * item->width(), item->implicitHeight())));
++ rectNode->update();
++ }
++ }
++
++ QQuickBasicProgressBar::QQuickBasicProgressBar(QQuickItem *parent) :
++ QQuickItem(parent)
++ {
++ setFlag(ItemHasContents);
++ }
++
++ qreal QQuickBasicProgressBar::progress() const
++ {
++ return m_progress;
++ }
++
++ void QQuickBasicProgressBar::setProgress(qreal progress)
++ {
++ if (progress == m_progress)
++ return;
++
++ m_progress = progress;
++ update();
++ }
++
++ bool QQuickBasicProgressBar::isIndeterminate() const
++ {
++ return m_indeterminate;
++ }
++
++ void QQuickBasicProgressBar::setIndeterminate(bool indeterminate)
++ {
++ if (indeterminate == m_indeterminate)
++ return;
++
++ m_indeterminate = indeterminate;
++ setClip(m_indeterminate);
++ update();
++ }
++
++ QColor QQuickBasicProgressBar::color() const
++ {
++ return m_color;
++ }
++
++ void QQuickBasicProgressBar::setColor(const QColor &color)
++ {
++ if (color == m_color)
++ return;
++
++ m_color = color;
++ update();
++ }
++
++ void QQuickBasicProgressBar::itemChange(QQuickItem::ItemChange change, const QQuickItem::ItemChangeData &data)
++ {
++ QQuickItem::itemChange(change, data);
++ if (change == ItemVisibleHasChanged)
++ update();
++ }
++
++ QSGNode *QQuickBasicProgressBar::updatePaintNode(QSGNode *oldNode, QQuickItem::UpdatePaintNodeData *)
++ {
++ QQuickBasicProgressBarNode *node = static_cast<QQuickBasicProgressBarNode *>(oldNode);
++ if (isVisible() && width() > 0 && height() > 0) {
++ if (!node)
++ node = new QQuickBasicProgressBarNode(this);
++ node->sync(this);
++ } else {
++ delete node;
++ node = nullptr;
++ }
++ return node;
++ }
++
++ QT_END_NAMESPACE
++
++ #include "moc_qquickbasicprogressbar_p.cpp"