Alessandro Bonazzi
8c43d5cf2f
Files correlati : cg0.exe cg0700a.msk cg0700b.msk cg3.exe cg4.exe Bug : Commento: Merge 1.0 libraries
357 lines
11 KiB
C++
357 lines
11 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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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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** $QT_BEGIN_LICENSE:LGPL$
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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 The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/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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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company 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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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtGui>
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#include <QtOpenGL>
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#include <QtSvg>
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#define NUM_SWIRLY_ITEMS 10
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class GLPainter : public QObject
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{
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Q_OBJECT
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public:
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GLPainter(QGLWidget *widget);
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void stop();
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void resizeViewport(const QSize &size);
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public slots:
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void start();
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protected:
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void timerEvent(QTimerEvent *event);
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void paint();
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void initSwirlyItems();
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void updateSwirlyItems();
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void drawSuggestiveMessages(QPainter *p);
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private:
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QMutex mutex;
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QGLWidget *glWidget;
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int viewportWidth;
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int viewportHeight;
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bool doRendering;
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qreal rotationAngle;
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bool swirlClockwise;
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QSvgRenderer svgRenderer;
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QPixmap logo;
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QPainter::PixmapFragment swirlyItems[NUM_SWIRLY_ITEMS];
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int swirlyCounter;
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int textCounter;
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int messageYPos;
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qreal scaleFactor;
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};
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GLPainter::GLPainter(QGLWidget *widget)
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: glWidget(widget)
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, doRendering(true)
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, rotationAngle(rand() % 360)
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, swirlClockwise((rand() % 2) == 1)
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, svgRenderer(QLatin1String(":/spiral.svg"), this)
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, logo(QLatin1String(":/qt-logo.png"))
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{
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}
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void GLPainter::start()
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{
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glWidget->makeCurrent();
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startTimer(20);
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}
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void GLPainter::stop()
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{
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QMutexLocker locker(&mutex);
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doRendering = false;
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}
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void GLPainter::resizeViewport(const QSize &size)
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{
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QMutexLocker locker(&mutex);
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viewportWidth = size.width();
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viewportHeight = size.height();
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initSwirlyItems();
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textCounter = 0;
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messageYPos = -1;
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}
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void GLPainter::timerEvent(QTimerEvent *event)
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{
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QMutexLocker locker(&mutex);
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if (!doRendering) {
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killTimer(event->timerId());
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QThread::currentThread()->quit();
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return;
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}
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updateSwirlyItems();
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paint();
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}
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void GLPainter::paint()
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{
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QPainter p(glWidget);
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p.fillRect(QRect(0, 0, viewportWidth, viewportHeight), Qt::white);
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p.setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
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p.translate(viewportWidth / 2, viewportHeight / 2);
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p.rotate(rotationAngle * (swirlClockwise ? 1 : -1));
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p.scale(svgRenderer.viewBox().width() / 200.0 * 0.65,
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svgRenderer.viewBox().height() / 200.0 * 0.65);
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p.translate(-viewportWidth / 2, -viewportHeight / 2);
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svgRenderer.render(&p);
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p.resetTransform();
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p.drawPixmapFragments(swirlyItems, NUM_SWIRLY_ITEMS, logo);
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drawSuggestiveMessages(&p);
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p.end();
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rotationAngle += 1.2;
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}
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void GLPainter::drawSuggestiveMessages(QPainter *p)
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{
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const int numSuggestiveMessages = 7;
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const char *texts[numSuggestiveMessages] = {" You feel relaxed.. ",
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" Let your mind wander.. ",
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" Look deep into the swirls.. ",
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" Even deeper.. ",
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" Qt is good! ",
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" Qt is good for you! ",
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" You MUST use Qt! "};
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QFont font(p->font());
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font.setPointSizeF(font.pointSizeF() * viewportWidth/200.0);
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p->setFont(font);
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QFontMetrics fm(font);
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int messageNo = textCounter/314;
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if (messageNo > 6 || messageNo < 0) {
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qFatal("This should not happen: %d - %d", messageNo, textCounter);
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}
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QLatin1String text(texts[textCounter / 314]);
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qreal textWidth = fm.width(text);
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int alpha = 255 * qAbs(qSin(textCounter * 0.01));
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if (messageYPos < 0 || (textCounter % 314 == 0)) {
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messageYPos = qBound(fm.height(), rand() % viewportHeight,
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viewportHeight - fm.height());
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}
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p->setPen(QColor(255, 255, 255, alpha));
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p->setBackground(QColor(50, 50, 50, qBound(0, alpha, 50)));
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p->setBackgroundMode(Qt::OpaqueMode);
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p->drawText((viewportWidth / 2) - (textWidth/ 2), messageYPos, text);
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++textCounter;
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if (textCounter >= (314 * numSuggestiveMessages))
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textCounter = 0;
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}
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void GLPainter::initSwirlyItems()
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{
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swirlyCounter = swirlClockwise ? 0 : 360;
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scaleFactor = viewportWidth / 200.0;
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QRectF logoRect(0, 0, logo.width(), logo.height());
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for (int i=0; i<NUM_SWIRLY_ITEMS; ++i) {
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if (swirlClockwise) {
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swirlyItems[i] = QPainter::PixmapFragment::create(QPointF(0, 0), logoRect,
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scaleFactor,
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scaleFactor);
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} else {
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swirlyItems[i] = QPainter::PixmapFragment::create(QPointF(0, 0), logoRect,
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scaleFactor * 1 / 360.0,
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scaleFactor * 1 / 360.0);
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}
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}
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}
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void GLPainter::updateSwirlyItems()
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{
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swirlyCounter += swirlClockwise ? 1 : -1;
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for (int i=0; i<NUM_SWIRLY_ITEMS; ++i) {
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int factor;
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factor = swirlClockwise ? (swirlyCounter - i * 20) : (swirlyCounter + i * 20);
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if (factor > 0 && factor <= 360) {
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swirlyItems[i].x = viewportWidth / 2.0 + qSin(factor * 0.05) * (viewportWidth / 2.0) * (100.0 / factor);
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swirlyItems[i].y = viewportHeight / 2.0 + qCos(factor * 0.05) * (viewportHeight / 2.0) * (100.0 / factor);
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swirlyItems[i].rotation += -swirlyCounter * 0.01;
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swirlyItems[i].scaleX += swirlClockwise ? -scaleFactor * 1 / 360.0 : scaleFactor * 1 / 360.0;
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if (swirlClockwise) {
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if (swirlyItems[i].scaleX < 0)
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swirlyItems[i].scaleX = scaleFactor;
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} else {
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if (swirlyItems[i].scaleX > scaleFactor)
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swirlyItems[i].scaleX = scaleFactor * 1 / 360.0;
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}
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swirlyItems[i].scaleY = swirlyItems[i].scaleX;
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} else {
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swirlyItems[i].scaleX = swirlyItems[i].scaleY = 0;
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}
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}
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if (swirlClockwise) {
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if (swirlyCounter > (360 + NUM_SWIRLY_ITEMS * 20))
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swirlyCounter = 0;
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} else {
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if (swirlyCounter < -NUM_SWIRLY_ITEMS * 20)
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swirlyCounter = 360;
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}
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}
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class GLWidget : public QGLWidget
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{
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public:
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GLWidget(QWidget *parent, QGLWidget *shareWidget = 0);
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~GLWidget();
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void startRendering();
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void stopRendering();
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protected:
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void resizeEvent(QResizeEvent *event);
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void paintEvent(QPaintEvent *event);
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QSize sizeHint() const { return QSize(200, 200); }
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private:
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GLPainter glPainter;
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QThread glThread;
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};
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GLWidget::GLWidget(QWidget *parent, QGLWidget *share)
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: QGLWidget(QGLFormat(QGL::SampleBuffers), parent, share)
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, glPainter(this)
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, glThread(this)
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{
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setAttribute(Qt::WA_PaintOutsidePaintEvent);
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setAttribute(Qt::WA_DeleteOnClose);
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}
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GLWidget::~GLWidget()
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{
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stopRendering();
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}
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void GLWidget::startRendering()
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{
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glPainter.moveToThread(&glThread);
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connect(&glThread, SIGNAL(started()), &glPainter, SLOT(start()));
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glThread.start();
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}
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void GLWidget::stopRendering()
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{
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glPainter.stop();
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glThread.wait();
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}
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void GLWidget::resizeEvent(QResizeEvent *event)
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{
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glPainter.resizeViewport(event->size());
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}
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void GLWidget::paintEvent(QPaintEvent *)
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{
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// Handled by GLPainter.
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}
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class MainWindow : public QMainWindow
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{
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Q_OBJECT
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public:
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MainWindow();
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private slots:
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void newThread();
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void killThread();
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private:
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QMdiArea mdiArea;
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QGLWidget shareWidget;
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};
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MainWindow::MainWindow()
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: QMainWindow(0)
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, mdiArea(this)
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, shareWidget(this)
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{
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setWindowTitle("Qt GL Hypnotizer");
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QMenu *menu = menuBar()->addMenu("&Hypnotizers");
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menu->addAction("&New hypnotizer thread", this, SLOT(newThread()), QKeySequence("Ctrl+N"));
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menu->addAction("&End current hypnotizer thread", this, SLOT(killThread()), QKeySequence("Ctrl+K"));
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menu->addSeparator();
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menu->addAction("E&xit", qApp, SLOT(quit()), QKeySequence("Ctrl+Q"));
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setCentralWidget(&mdiArea);
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shareWidget.resize(1, 1);
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newThread();
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}
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void MainWindow::newThread()
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{
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static int windowCount = 1;
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if (mdiArea.subWindowList().count() > 9)
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return;
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GLWidget *widget = new GLWidget(&mdiArea, &shareWidget);
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mdiArea.addSubWindow(widget);
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widget->setWindowTitle("Thread #" + QString::number(windowCount++));
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widget->show();
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widget->startRendering();
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}
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void MainWindow::killThread()
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{
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delete mdiArea.activeSubWindow();
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}
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int main(int argc, char *argv[])
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{
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// Make Xlib and GLX thread safe under X11
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QApplication::setAttribute(Qt::AA_X11InitThreads);
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QApplication application(argc, argv);
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// Using QPainter to draw into QGLWidgets is only supported with GL 2.0
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if (!((QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_Version_2_0) ||
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(QGLFormat::openGLVersionFlags() & QGLFormat::OpenGL_ES_Version_2_0))) {
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QMessageBox::information(0, "Qt GL Hypnotizer",
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"This system does not support OpenGL 2.0 or OpenGL ES 2.0, "
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"which is required for this example to work.");
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return 0;
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}
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MainWindow mainWindow;
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mainWindow.show();
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return application.exec();
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}
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#include "main.moc"
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