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Diffstat (limited to 'examples/opengl/grabber/mainwindow.cpp')
| -rw-r--r-- | examples/opengl/grabber/mainwindow.cpp | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/examples/opengl/grabber/mainwindow.cpp b/examples/opengl/grabber/mainwindow.cpp new file mode 100644 index 0000000000..d2f3a98dce --- /dev/null +++ b/examples/opengl/grabber/mainwindow.cpp @@ -0,0 +1,206 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui> +#include <QtOpenGL> + +#include "glwidget.h" +#include "mainwindow.h" + +MainWindow::MainWindow() +{ + centralWidget = new QWidget; + setCentralWidget(centralWidget); + + glWidget = new GLWidget; + pixmapLabel = new QLabel; + + glWidgetArea = new QScrollArea; + glWidgetArea->setWidget(glWidget); + glWidgetArea->setWidgetResizable(true); + glWidgetArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); + glWidgetArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); + glWidgetArea->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored); + glWidgetArea->setMinimumSize(50, 50); + + pixmapLabelArea = new QScrollArea; + pixmapLabelArea->setWidget(pixmapLabel); + pixmapLabelArea->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored); + pixmapLabelArea->setMinimumSize(50, 50); + + xSlider = createSlider(SIGNAL(xRotationChanged(int)), + SLOT(setXRotation(int))); + ySlider = createSlider(SIGNAL(yRotationChanged(int)), + SLOT(setYRotation(int))); + zSlider = createSlider(SIGNAL(zRotationChanged(int)), + SLOT(setZRotation(int))); + + createActions(); + createMenus(); + + QGridLayout *centralLayout = new QGridLayout; + centralLayout->addWidget(glWidgetArea, 0, 0); + centralLayout->addWidget(pixmapLabelArea, 0, 1); + centralLayout->addWidget(xSlider, 1, 0, 1, 2); + centralLayout->addWidget(ySlider, 2, 0, 1, 2); + centralLayout->addWidget(zSlider, 3, 0, 1, 2); + centralWidget->setLayout(centralLayout); + + xSlider->setValue(15 * 16); + ySlider->setValue(345 * 16); + zSlider->setValue(0 * 16); + + setWindowTitle(tr("Grabber")); + resize(400, 300); +} + +void MainWindow::renderIntoPixmap() +{ + QSize size = getSize(); + if (size.isValid()) { + QPixmap pixmap = glWidget->renderPixmap(size.width(), size.height()); + setPixmap(pixmap); + } +} + +void MainWindow::grabFrameBuffer() +{ + QImage image = glWidget->grabFrameBuffer(); + setPixmap(QPixmap::fromImage(image)); +} + +void MainWindow::clearPixmap() +{ + setPixmap(QPixmap()); +} + +void MainWindow::about() +{ + QMessageBox::about(this, tr("About Grabber"), + tr("The <b>Grabber</b> example demonstrates two approaches for " + "rendering OpenGL into a Qt pixmap.")); +} + +void MainWindow::createActions() +{ + renderIntoPixmapAct = new QAction(tr("&Render into Pixmap..."), this); + renderIntoPixmapAct->setShortcut(tr("Ctrl+R")); + connect(renderIntoPixmapAct, SIGNAL(triggered()), + this, SLOT(renderIntoPixmap())); + + grabFrameBufferAct = new QAction(tr("&Grab Frame Buffer"), this); + grabFrameBufferAct->setShortcut(tr("Ctrl+G")); + connect(grabFrameBufferAct, SIGNAL(triggered()), + this, SLOT(grabFrameBuffer())); + + clearPixmapAct = new QAction(tr("&Clear Pixmap"), this); + clearPixmapAct->setShortcut(tr("Ctrl+L")); + connect(clearPixmapAct, SIGNAL(triggered()), this, SLOT(clearPixmap())); + + exitAct = new QAction(tr("E&xit"), this); + exitAct->setShortcuts(QKeySequence::Quit); + connect(exitAct, SIGNAL(triggered()), this, SLOT(close())); + + aboutAct = new QAction(tr("&About"), this); + connect(aboutAct, SIGNAL(triggered()), this, SLOT(about())); + + aboutQtAct = new QAction(tr("About &Qt"), this); + connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt())); +} + +void MainWindow::createMenus() +{ + fileMenu = menuBar()->addMenu(tr("&File")); + fileMenu->addAction(renderIntoPixmapAct); + fileMenu->addAction(grabFrameBufferAct); + fileMenu->addAction(clearPixmapAct); + fileMenu->addSeparator(); + fileMenu->addAction(exitAct); + + helpMenu = menuBar()->addMenu(tr("&Help")); + helpMenu->addAction(aboutAct); + helpMenu->addAction(aboutQtAct); +} + +QSlider *MainWindow::createSlider(const char *changedSignal, + const char *setterSlot) +{ + QSlider *slider = new QSlider(Qt::Horizontal); + slider->setRange(0, 360 * 16); + slider->setSingleStep(16); + slider->setPageStep(15 * 16); + slider->setTickInterval(15 * 16); + slider->setTickPosition(QSlider::TicksRight); + connect(slider, SIGNAL(valueChanged(int)), glWidget, setterSlot); + connect(glWidget, changedSignal, slider, SLOT(setValue(int))); + return slider; +} + +void MainWindow::setPixmap(const QPixmap &pixmap) +{ + pixmapLabel->setPixmap(pixmap); + QSize size = pixmap.size(); + if (size - QSize(1, 0) == pixmapLabelArea->maximumViewportSize()) + size -= QSize(1, 0); + pixmapLabel->resize(size); +} + +QSize MainWindow::getSize() +{ + bool ok; + QString text = QInputDialog::getText(this, tr("Grabber"), + tr("Enter pixmap size:"), + QLineEdit::Normal, + tr("%1 x %2").arg(glWidget->width()) + .arg(glWidget->height()), + &ok); + if (!ok) + return QSize(); + + QRegExp regExp(tr("([0-9]+) *x *([0-9]+)")); + if (regExp.exactMatch(text)) { + int width = regExp.cap(1).toInt(); + int height = regExp.cap(2).toInt(); + if (width > 0 && width < 2048 && height > 0 && height < 2048) + return QSize(width, height); + } + + return glWidget->size(); +} |