8d720bff2d
Change-Id: Ie7202efc88c176e2c39574677227c9f177c8e6d1 Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>
226 lines
7.5 KiB
C++
226 lines
7.5 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2013 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 examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
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** of its contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "paintedwindow.h"
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#include <QGuiApplication>
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#include <QOpenGLContext>
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#include <QOpenGLPaintDevice>
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#include <QPainter>
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#include <QScreen>
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#include <QTimer>
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#include <qmath.h>
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PaintedWindow::PaintedWindow()
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{
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QSurfaceFormat format;
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format.setStencilBufferSize(8);
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format.setSamples(4);
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setSurfaceType(QWindow::OpenGLSurface);
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setFlags(Qt::Window | Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
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setFormat(format);
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create();
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m_context = new QOpenGLContext(this);
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m_context->setFormat(format);
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m_context->create();
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m_animation = new QPropertyAnimation(this, "rotation");
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m_animation->setStartValue(qreal(0));
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m_animation->setEndValue(qreal(1));
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m_animation->setDuration(500);
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QRect screenGeometry = screen()->availableGeometry();
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QPoint center = screenGeometry.center();
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QRect windowRect = screen()->isLandscape(screen()->orientation()) ? QRect(0, 0, 640, 480) : QRect(0, 0, 480, 640);
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setGeometry(QRect(center - windowRect.center(), windowRect.size()));
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m_rotation = 0;
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reportContentOrientationChange(screen()->orientation());
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m_targetOrientation = contentOrientation();
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m_nextTargetOrientation = Qt::PrimaryOrientation;
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connect(screen(), SIGNAL(orientationChanged(Qt::ScreenOrientation)), this, SLOT(orientationChanged(Qt::ScreenOrientation)));
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connect(m_animation, SIGNAL(finished()), this, SLOT(rotationDone()));
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connect(this, SIGNAL(rotationChanged(qreal)), this, SLOT(paint()));
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}
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void PaintedWindow::resizeEvent(QResizeEvent *)
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{
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paint();
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}
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void PaintedWindow::exposeEvent(QExposeEvent *)
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{
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paint();
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}
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void PaintedWindow::mousePressEvent(QMouseEvent *)
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{
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Qt::ScreenOrientation o = contentOrientation();
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switch (o) {
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case Qt::LandscapeOrientation:
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orientationChanged(Qt::PortraitOrientation);
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break;
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case Qt::PortraitOrientation:
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orientationChanged(Qt::InvertedLandscapeOrientation);
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break;
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case Qt::InvertedLandscapeOrientation:
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orientationChanged(Qt::InvertedPortraitOrientation);
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break;
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case Qt::InvertedPortraitOrientation:
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orientationChanged(Qt::LandscapeOrientation);
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break;
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default:
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Q_ASSERT(false);
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}
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paint();
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}
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void PaintedWindow::orientationChanged(Qt::ScreenOrientation newOrientation)
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{
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if (contentOrientation() == newOrientation)
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return;
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if (m_animation->state() == QAbstractAnimation::Running) {
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m_nextTargetOrientation = newOrientation;
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return;
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}
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QRect rect(0, 0, width(), height());
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m_prevImage = QImage(width(), height(), QImage::Format_ARGB32_Premultiplied);
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m_nextImage = QImage(width(), height(), QImage::Format_ARGB32_Premultiplied);
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m_prevImage.fill(0);
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m_nextImage.fill(0);
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QPainter p;
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p.begin(&m_prevImage);
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p.setTransform(screen()->transformBetween(contentOrientation(), screen()->orientation(), rect));
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paint(&p, screen()->mapBetween(contentOrientation(), screen()->orientation(), rect));
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p.end();
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p.begin(&m_nextImage);
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p.setTransform(screen()->transformBetween(newOrientation, screen()->orientation(), rect));
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paint(&p, screen()->mapBetween(newOrientation, screen()->orientation(), rect));
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p.end();
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m_deltaRotation = screen()->angleBetween(newOrientation, contentOrientation());
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if (m_deltaRotation > 180)
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m_deltaRotation = 180 - m_deltaRotation;
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m_targetOrientation = newOrientation;
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m_animation->start();
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}
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void PaintedWindow::rotationDone()
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{
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reportContentOrientationChange(m_targetOrientation);
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if (m_nextTargetOrientation != Qt::PrimaryOrientation) {
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Q_ASSERT(m_animation->state() != QAbstractAnimation::Running);
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orientationChanged(m_nextTargetOrientation);
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m_nextTargetOrientation = Qt::PrimaryOrientation;
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}
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}
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void PaintedWindow::setRotation(qreal r)
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{
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if (r != m_rotation) {
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m_rotation = r;
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emit rotationChanged(r);
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}
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}
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void PaintedWindow::paint()
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{
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m_context->makeCurrent(this);
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QRect rect(0, 0, width(), height());
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QOpenGLPaintDevice device(size());
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QPainter painter(&device);
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QPainterPath path;
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path.addEllipse(rect);
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painter.setCompositionMode(QPainter::CompositionMode_Source);
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painter.fillRect(rect, Qt::transparent);
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painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
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painter.fillPath(path, Qt::blue);
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if (contentOrientation() != m_targetOrientation) {
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painter.setRenderHint(QPainter::SmoothPixmapTransform);
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painter.save();
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painter.translate(width() / 2, height() / 2);
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painter.rotate(m_deltaRotation * m_rotation);
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painter.translate(-width() / 2, -height() / 2);
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painter.drawImage(0, 0, m_prevImage);
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painter.restore();
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painter.translate(width() / 2, height() / 2);
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painter.rotate(m_deltaRotation * m_rotation - m_deltaRotation);
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painter.translate(-width() / 2, -height() / 2);
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painter.setOpacity(m_rotation);
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painter.drawImage(0, 0, m_nextImage);
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} else {
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QRect mapped = screen()->mapBetween(contentOrientation(), screen()->orientation(), rect);
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painter.setTransform(screen()->transformBetween(contentOrientation(), screen()->orientation(), rect));
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paint(&painter, mapped);
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painter.end();
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}
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m_context->swapBuffers(this);
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}
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void PaintedWindow::paint(QPainter *painter, const QRect &rect)
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{
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painter->setRenderHint(QPainter::Antialiasing);
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QFont font;
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font.setPixelSize(64);
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painter->setFont(font);
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painter->drawText(rect, Qt::AlignCenter, "Hello");
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}
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