/**************************************************************************** ** ** 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 "qquickmaterialbusyindicator_p.h" #include #include #include #include #include QT_BEGIN_NAMESPACE /* Relevant Android code: - core/res/res/anim/progress_indeterminate_rotation_material.xml contains the rotation animation data. - core/res/res/anim/progress_indeterminate_material.xml contains the trim animation data. - core/res/res/interpolator/trim_start_interpolator.xml and core/res/res/interpolator/trim_end_interpolator.xml contain the start and end trim path interpolators. - addCommand() in core/java/android/util/PathParser.java has a list of the different path commands available. */ static const int SpanAnimationDuration = 700; static const int RotationAnimationDuration = SpanAnimationDuration * 6; static const int TargetRotation = 720; static const int OneDegree = 16; static const qreal MinSweepSpan = 10 * OneDegree; static const qreal MaxSweepSpan = 300 * OneDegree; class QQuickMaterialBusyIndicatorNode : public QQuickAnimatedNode { public: QQuickMaterialBusyIndicatorNode(QQuickMaterialBusyIndicator *item); void sync(QQuickItem *item) override; protected: void updateCurrentTime(int time) override; private: int m_lastStartAngle; int m_lastEndAngle; qreal m_width; qreal m_height; qreal m_devicePixelRatio; QColor m_color; }; QQuickMaterialBusyIndicatorNode::QQuickMaterialBusyIndicatorNode(QQuickMaterialBusyIndicator *item) : QQuickAnimatedNode(item), m_lastStartAngle(0), m_lastEndAngle(0), m_width(0), m_height(0), m_devicePixelRatio(1) { setLoopCount(Infinite); setCurrentTime(item->elapsed()); setDuration(RotationAnimationDuration); QSGImageNode *textureNode = item->window()->createImageNode(); textureNode->setOwnsTexture(true); appendChildNode(textureNode); // A texture seems to be required here, but we don't have one yet, as we haven't drawn anything, // so just use a blank image. QImage blankImage(item->width(), item->height(), QImage::Format_ARGB32_Premultiplied); blankImage.fill(Qt::transparent); textureNode->setTexture(item->window()->createTextureFromImage(blankImage)); } void QQuickMaterialBusyIndicatorNode::updateCurrentTime(int time) { const qreal w = m_width; const qreal h = m_height; const qreal size = qMin(w, h); const qreal dx = (w - size) / 2; const qreal dy = (h - size) / 2; QImage image(size * m_devicePixelRatio, size * m_devicePixelRatio, QImage::Format_ARGB32_Premultiplied); image.fill(Qt::transparent); QPainter painter(&image); painter.setRenderHint(QPainter::Antialiasing); QPen pen; QSGImageNode *textureNode = static_cast(firstChild()); pen.setColor(m_color); pen.setWidth(4 * m_devicePixelRatio); painter.setPen(pen); const qreal percentageComplete = time / qreal(RotationAnimationDuration); const qreal spanPercentageComplete = (time % SpanAnimationDuration) / qreal(SpanAnimationDuration); const int iteration = time / SpanAnimationDuration; int startAngle = 0; int endAngle = 0; if (iteration % 2 == 0) { if (m_lastStartAngle > 360 * OneDegree) m_lastStartAngle -= 360 * OneDegree; // The start angle is only affected by the rotation animation for the "grow" phase. startAngle = m_lastStartAngle; QEasingCurve angleCurve(QEasingCurve::OutQuad); const qreal percentage = angleCurve.valueForProgress(spanPercentageComplete); endAngle = m_lastStartAngle + MinSweepSpan + percentage * (MaxSweepSpan - MinSweepSpan); m_lastEndAngle = endAngle; } else { // Both the start angle *and* the span are affected by the "shrink" phase. QEasingCurve angleCurve(QEasingCurve::InQuad); const qreal percentage = angleCurve.valueForProgress(spanPercentageComplete); startAngle = m_lastEndAngle - MaxSweepSpan + percentage * (MaxSweepSpan - MinSweepSpan); endAngle = m_lastEndAngle; m_lastStartAngle = startAngle; } const int halfPen = pen.width() / 2; const QRectF arcBounds = QRectF(halfPen, halfPen, m_devicePixelRatio * size - pen.width(), m_devicePixelRatio * size - pen.width()); // The current angle of the rotation animation. const qreal rotation = OneDegree * percentageComplete * -TargetRotation; startAngle -= rotation; endAngle -= rotation; const int angleSpan = endAngle - startAngle; painter.drawArc(arcBounds, -startAngle, -angleSpan); painter.end(); textureNode->setRect(QRectF(dx, dy, size, size)); textureNode->setTexture(window()->createTextureFromImage(image)); } void QQuickMaterialBusyIndicatorNode::sync(QQuickItem *item) { QQuickMaterialBusyIndicator *indicator = static_cast(item); m_color = indicator->color(); m_width = indicator->width(); m_height = indicator->height(); m_devicePixelRatio = indicator->window()->effectiveDevicePixelRatio(); } QQuickMaterialBusyIndicator::QQuickMaterialBusyIndicator(QQuickItem *parent) : QQuickItem(parent), m_elapsed(0), m_color(Qt::black) { setFlag(ItemHasContents); } QColor QQuickMaterialBusyIndicator::color() const { return m_color; } void QQuickMaterialBusyIndicator::setColor(QColor color) { if (m_color == color) return; m_color = color; update(); } bool QQuickMaterialBusyIndicator::isRunning() const { return isVisible(); } void QQuickMaterialBusyIndicator::setRunning(bool running) { if (running) setVisible(true); } int QQuickMaterialBusyIndicator::elapsed() const { return m_elapsed; } void QQuickMaterialBusyIndicator::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 *QQuickMaterialBusyIndicator::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *) { QQuickMaterialBusyIndicatorNode *node = static_cast(oldNode); if (isRunning() && width() > 0 && height() > 0) { if (!node) { node = new QQuickMaterialBusyIndicatorNode(this); node->start(); } node->sync(this); } else { m_elapsed = node ? node->currentTime() : 0; delete node; node = nullptr; } return node; } QT_END_NAMESPACE