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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "spinner.h"
#include <QtQuick/QQuickWindow>
#include <QtGui/QScreen>
#include <QtQuick/QSGSimpleTextureNode>
#include <QtGui/QConicalGradient>
#include <QtGui/QPainter>
class SpinnerNode : public QObject, public QSGTransformNode
{
Q_OBJECT
public:
SpinnerNode(QQuickWindow *window)
: m_rotation(0)
, m_spinning(false)
, m_window(window)
{
connect(window, &QQuickWindow::beforeRendering, this, &SpinnerNode::maybeRotate);
connect(window, &QQuickWindow::frameSwapped, this, &SpinnerNode::maybeUpdate);
QImage image(":/scenegraph/threadedanimation/spinner.png");
m_texture = window->createTextureFromImage(image);
QSGSimpleTextureNode *textureNode = new QSGSimpleTextureNode();
textureNode->setTexture(m_texture);
textureNode->setRect(0, 0, image.width(), image.height());
textureNode->setFiltering(QSGTexture::Linear);
appendChildNode(textureNode);
}
~SpinnerNode() {
delete m_texture;
}
void setSpinning(bool spinning)
{
m_spinning = spinning;
}
public slots:
void maybeRotate() {
if (m_spinning) {
m_rotation += (360 / m_window->screen()->refreshRate());
QMatrix4x4 matrix;
matrix.translate(32, 32);
matrix.rotate(m_rotation, 0, 0, 1);
matrix.translate(-32, -32);
setMatrix(matrix);
}
}
void maybeUpdate() {
if (m_spinning) {
m_window->update();
}
}
private:
qreal m_rotation;
bool m_spinning;
QSGTexture *m_texture;
QQuickWindow *m_window;
};
Spinner::Spinner()
: m_spinning(false)
{
setSize(QSize(64, 64));
setFlag(ItemHasContents);
}
void Spinner::setSpinning(bool spinning)
{
if (spinning == m_spinning)
return;
m_spinning = spinning;
emit spinningChanged();
update();
}
QSGNode *Spinner::updatePaintNode(QSGNode *old, UpdatePaintNodeData *)
{
SpinnerNode *n = static_cast<SpinnerNode *>(old);
if (!n)
n = new SpinnerNode(window());
n->setSpinning(m_spinning);
return n;
}
#include "spinner.moc"
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