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Diffstat (limited to 'src/imports/controls/qquickdefaultprogressbar.cpp')
| -rw-r--r-- | src/imports/controls/qquickdefaultprogressbar.cpp | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/src/imports/controls/qquickdefaultprogressbar.cpp b/src/imports/controls/qquickdefaultprogressbar.cpp new file mode 100644 index 00000000..a91b7d3b --- /dev/null +++ b/src/imports/controls/qquickdefaultprogressbar.cpp @@ -0,0 +1,272 @@ +/**************************************************************************** +** +** Copyright (C) 2016 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 const QRgb FillColor = 0x353637; + +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; + qreal m_pixelsPerSecond; +}; + +QQuickDefaultProgressBarNode::QQuickDefaultProgressBarNode(QQuickDefaultProgressBar *item) + : QQuickAnimatedNode(item), + m_indeterminate(false), + 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(FillColor); + 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(FillColor); + appendChildNode(rectNode); + } + + rectNode->setRect(QRectF(QPointF(0, 0), QSizeF(bar->progress() * item->width(), item->implicitHeight()))); + rectNode->update(); + } +} + +QQuickDefaultProgressBar::QQuickDefaultProgressBar(QQuickItem *parent) : + QQuickItem(parent), + m_progress(0), + m_indeterminate(false) +{ + setFlag(ItemHasContents); +} + +qreal QQuickDefaultProgressBar::progress() const +{ + return m_progress; +} + +void QQuickDefaultProgressBar::setProgress(qreal progress) +{ + if (progress == m_progress) + return; + + m_progress = progress; + update(); + emit progressChanged(); +} + +bool QQuickDefaultProgressBar::isIndeterminate() const +{ + return m_indeterminate; +} + +void QQuickDefaultProgressBar::setIndeterminate(bool indeterminate) +{ + if (indeterminate == m_indeterminate) + return; + + m_indeterminate = indeterminate; + setClip(m_indeterminate); + update(); + emit indeterminateChanged(); +} + +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 |