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Diffstat (limited to 'src/imports/controls/default/impl/qquickdefaultbusyindicator.cpp')
| -rw-r--r-- | src/imports/controls/default/impl/qquickdefaultbusyindicator.cpp | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/src/imports/controls/default/impl/qquickdefaultbusyindicator.cpp b/src/imports/controls/default/impl/qquickdefaultbusyindicator.cpp new file mode 100644 index 00000000..880d869b --- /dev/null +++ b/src/imports/controls/default/impl/qquickdefaultbusyindicator.cpp @@ -0,0 +1,223 @@ +/**************************************************************************** +** +** 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 "qquickdefaultbusyindicator_p.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 CircleCount = 10; +static const int TotalDuration = 100 * CircleCount * 2; +static const QRgb TransparentColor = 0x00000000; + +static QPointF moveCircle(const QPointF &pos, qreal rotation, qreal distance) +{ + return pos - QTransform().rotate(rotation).map(QPointF(0, distance)); +} + +class QQuickDefaultBusyIndicatorNode : public QQuickAnimatedNode +{ +public: + QQuickDefaultBusyIndicatorNode(QQuickDefaultBusyIndicator *item); + + void updateCurrentTime(int time) override; + void sync(QQuickItem *item) override; + +private: + QColor m_pen; + QColor m_fill; +}; + +QQuickDefaultBusyIndicatorNode::QQuickDefaultBusyIndicatorNode(QQuickDefaultBusyIndicator *item) + : QQuickAnimatedNode(item) +{ + setLoopCount(Infinite); + setDuration(TotalDuration); + setCurrentTime(item->elapsed()); + + for (int i = 0; i < CircleCount; ++i) { + QSGTransformNode *transformNode = new QSGTransformNode; + appendChildNode(transformNode); + + QQuickItemPrivate *d = QQuickItemPrivate::get(item); + QSGInternalRectangleNode *rectNode = d->sceneGraphContext()->createInternalRectangleNode(); + rectNode->setAntialiasing(true); + transformNode->appendChildNode(rectNode); + } +} + +void QQuickDefaultBusyIndicatorNode::updateCurrentTime(int time) +{ + const qreal percentageComplete = time / qreal(TotalDuration); + const qreal firstPhaseProgress = percentageComplete <= 0.5 ? percentageComplete * 2 : 0; + const qreal secondPhaseProgress = percentageComplete > 0.5 ? (percentageComplete - 0.5) * 2 : 0; + + QSGTransformNode *transformNode = static_cast<QSGTransformNode*>(firstChild()); + Q_ASSERT(transformNode->type() == QSGNode::TransformNodeType); + for (int i = 0; i < CircleCount; ++i) { + QSGInternalRectangleNode *rectNode = static_cast<QSGInternalRectangleNode*>(transformNode->firstChild()); + Q_ASSERT(rectNode->type() == QSGNode::GeometryNodeType); + + const bool fill = (firstPhaseProgress > qreal(i) / CircleCount) || (secondPhaseProgress > 0 && secondPhaseProgress < qreal(i) / CircleCount); + rectNode->setColor(fill ? m_fill : QColor::fromRgba(TransparentColor)); + rectNode->setPenColor(m_pen); + rectNode->setPenWidth(1); + rectNode->update(); + + transformNode = static_cast<QSGTransformNode*>(transformNode->nextSibling()); + } +} + +void QQuickDefaultBusyIndicatorNode::sync(QQuickItem *item) +{ + const qreal w = item->width(); + const qreal h = item->height(); + const qreal sz = qMin(w, h); + const qreal dx = (w - sz) / 2; + const qreal dy = (h - sz) / 2; + const int circleRadius = sz / 12; + + m_pen = static_cast<QQuickDefaultBusyIndicator *>(item)->pen(); + m_fill = static_cast<QQuickDefaultBusyIndicator *>(item)->fill(); + + QSGTransformNode *transformNode = static_cast<QSGTransformNode *>(firstChild()); + for (int i = 0; i < CircleCount; ++i) { + Q_ASSERT(transformNode->type() == QSGNode::TransformNodeType); + + QSGInternalRectangleNode *rectNode = static_cast<QSGInternalRectangleNode *>(transformNode->firstChild()); + Q_ASSERT(rectNode->type() == QSGNode::GeometryNodeType); + + QPointF pos = QPointF(sz / 2 - circleRadius, sz / 2 - circleRadius); + pos = moveCircle(pos, 360.0 / CircleCount * i, sz / 2 - circleRadius); + + QMatrix4x4 m; + m.translate(dx + pos.x(), dy + pos.y()); + transformNode->setMatrix(m); + + rectNode->setRect(QRectF(QPointF(), QSizeF(circleRadius * 2, circleRadius * 2))); + rectNode->setRadius(circleRadius); + + transformNode = static_cast<QSGTransformNode *>(transformNode->nextSibling()); + } +} + +QQuickDefaultBusyIndicator::QQuickDefaultBusyIndicator(QQuickItem *parent) : + QQuickItem(parent) +{ + setFlag(ItemHasContents); +} + +QColor QQuickDefaultBusyIndicator::pen() const +{ + return m_pen; +} + +void QQuickDefaultBusyIndicator::setPen(const QColor &pen) +{ + if (pen == m_pen) + return; + + m_pen = pen; + update(); +} + +QColor QQuickDefaultBusyIndicator::fill() const +{ + return m_fill; +} + +void QQuickDefaultBusyIndicator::setFill(const QColor &fill) +{ + if (fill == m_fill) + return; + + m_fill = fill; + update(); +} + +bool QQuickDefaultBusyIndicator::isRunning() const +{ + return isVisible(); +} + +void QQuickDefaultBusyIndicator::setRunning(bool running) +{ + if (running) + setVisible(true); +} + +int QQuickDefaultBusyIndicator::elapsed() const +{ + return m_elapsed; +} + +void QQuickDefaultBusyIndicator::itemChange(QQuickItem::ItemChange change, const QQuickItem::ItemChangeData &data) +{ + QQuickItem::itemChange(change, data); + switch (change) { + case ItemOpacityHasChanged: + if (qFuzzyIsNull(data.realValue)) + setVisible(false); + break; + case ItemVisibleHasChanged: + update(); + break; + default: + break; + } +} + +QSGNode *QQuickDefaultBusyIndicator::updatePaintNode(QSGNode *oldNode, QQuickItem::UpdatePaintNodeData *) +{ + QQuickDefaultBusyIndicatorNode *node = static_cast<QQuickDefaultBusyIndicatorNode *>(oldNode); + if (isRunning() && width() > 0 && height() > 0) { + if (!node) { + node = new QQuickDefaultBusyIndicatorNode(this); + node->start(); + } + node->sync(this); + } else { + m_elapsed = node ? node->currentTime() : 0; + delete node; + node = nullptr; + } + return node; +} + +QT_END_NAMESPACE |