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| ** This file is part of the examples of the Qt Toolkit. |
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| |
| #include "glwidget.h" |
| #include "mainwindow.h" |
| |
| #include <QtWidgets> |
| |
| 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() / pixmap.devicePixelRatio(); |
| 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(); |
| |
| QRegularExpression regExp(tr("^([0-9]+) *x *([0-9]+)$")); |
| QRegularExpressionMatch match = regExp.match(text); |
| if (match.hasMatch()) { |
| int width = match.captured(1).toInt(); |
| int height = match.captured(2).toInt(); |
| if (width > 0 && width < 2048 && height > 0 && height < 2048) |
| return QSize(width, height); |
| } |
| |
| return glWidget->size(); |
| } |