126 lines
3.7 KiB
C++
126 lines
3.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL21$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "spinner.h"
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#include <QtQuick/QQuickWindow>
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#include <QtGui/QScreen>
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#include <QtQuick/QSGSimpleTextureNode>
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#include <QtGui/QConicalGradient>
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#include <QtGui/QPainter>
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class SpinnerNode : public QObject, public QSGTransformNode
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{
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Q_OBJECT
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public:
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SpinnerNode(QQuickWindow *window)
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: m_rotation(0)
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, m_spinning(false)
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, m_window(window)
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{
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connect(window, SIGNAL(beforeRendering()), this, SLOT(maybeRotate()));
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connect(window, SIGNAL(frameSwapped()), this, SLOT(maybeUpdate()));
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QImage image(":/scenegraph/threadedanimation/spinner.png");
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m_texture = window->createTextureFromImage(image);
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QSGSimpleTextureNode *textureNode = new QSGSimpleTextureNode();
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textureNode->setTexture(m_texture);
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textureNode->setRect(0, 0, image.width(), image.height());
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textureNode->setFiltering(QSGTexture::Linear);
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appendChildNode(textureNode);
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}
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~SpinnerNode() {
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delete m_texture;
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}
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void setSpinning(bool spinning)
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{
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m_spinning = spinning;
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}
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public slots:
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void maybeRotate() {
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if (m_spinning) {
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m_rotation += (360 / m_window->screen()->refreshRate());
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QMatrix4x4 matrix;
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matrix.translate(32, 32);
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matrix.rotate(m_rotation, 0, 0, 1);
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matrix.translate(-32, -32);
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setMatrix(matrix);
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}
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}
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void maybeUpdate() {
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if (m_spinning) {
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m_window->update();
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}
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}
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private:
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qreal m_rotation;
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bool m_spinning;
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QSGTexture *m_texture;
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QQuickWindow *m_window;
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};
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Spinner::Spinner()
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: m_spinning(false)
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{
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setSize(QSize(64, 64));
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setFlag(ItemHasContents);
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}
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void Spinner::setSpinning(bool spinning)
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{
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if (spinning == m_spinning)
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return;
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m_spinning = spinning;
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emit spinningChanged();
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update();
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}
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QSGNode *Spinner::updatePaintNode(QSGNode *old, UpdatePaintNodeData *)
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{
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SpinnerNode *n = static_cast<SpinnerNode *>(old);
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if (!n)
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n = new SpinnerNode(window());
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n->setSpinning(m_spinning);
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return n;
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}
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#include "spinner.moc"
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