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Diffstat (limited to 'examples/widgets/desktop/screenshot/screenshot.cpp')
| -rw-r--r-- | examples/widgets/desktop/screenshot/screenshot.cpp | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/examples/widgets/desktop/screenshot/screenshot.cpp b/examples/widgets/desktop/screenshot/screenshot.cpp new file mode 100644 index 0000000000..12c6bee6d4 --- /dev/null +++ b/examples/widgets/desktop/screenshot/screenshot.cpp @@ -0,0 +1,199 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** 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 <QtWidgets> + +#include "screenshot.h" + +//! [0] +Screenshot::Screenshot() +{ + screenshotLabel = new QLabel; + screenshotLabel->setSizePolicy(QSizePolicy::Expanding, + QSizePolicy::Expanding); + screenshotLabel->setAlignment(Qt::AlignCenter); + screenshotLabel->setMinimumSize(240, 160); + + createOptionsGroupBox(); + createButtonsLayout(); + + mainLayout = new QVBoxLayout; + mainLayout->addWidget(screenshotLabel); + mainLayout->addWidget(optionsGroupBox); + mainLayout->addLayout(buttonsLayout); + setLayout(mainLayout); + + shootScreen(); + delaySpinBox->setValue(5); + + setWindowTitle(tr("Screenshot")); + resize(300, 200); +} +//! [0] + +//! [1] +void Screenshot::resizeEvent(QResizeEvent * /* event */) +{ + QSize scaledSize = originalPixmap.size(); + scaledSize.scale(screenshotLabel->size(), Qt::KeepAspectRatio); + if (!screenshotLabel->pixmap() + || scaledSize != screenshotLabel->pixmap()->size()) + updateScreenshotLabel(); +} +//! [1] + +//! [2] +void Screenshot::newScreenshot() +{ + if (hideThisWindowCheckBox->isChecked()) + hide(); + newScreenshotButton->setDisabled(true); + + QTimer::singleShot(delaySpinBox->value() * 1000, this, SLOT(shootScreen())); +} +//! [2] + +//! [3] +void Screenshot::saveScreenshot() +{ + QString format = "png"; + QString initialPath = QDir::currentPath() + tr("/untitled.") + format; + + QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"), + initialPath, + tr("%1 Files (*.%2);;All Files (*)") + .arg(format.toUpper()) + .arg(format)); + if (!fileName.isEmpty()) + originalPixmap.save(fileName, format.toLatin1().constData()); +} +//! [3] + +//! [4] +void Screenshot::shootScreen() +{ + if (delaySpinBox->value() != 0) + qApp->beep(); +//! [4] + originalPixmap = QPixmap(); // clear image for low memory situations + // on embedded devices. +//! [5] + QScreen *screen = QGuiApplication::primaryScreen(); + if (screen) + originalPixmap = screen->grabWindow(0); + updateScreenshotLabel(); + + newScreenshotButton->setDisabled(false); + if (hideThisWindowCheckBox->isChecked()) + show(); +} +//! [5] + +//! [6] +void Screenshot::updateCheckBox() +{ + if (delaySpinBox->value() == 0) { + hideThisWindowCheckBox->setDisabled(true); + hideThisWindowCheckBox->setChecked(false); + } + else + hideThisWindowCheckBox->setDisabled(false); +} +//! [6] + +//! [7] +void Screenshot::createOptionsGroupBox() +{ + optionsGroupBox = new QGroupBox(tr("Options")); + + delaySpinBox = new QSpinBox; + delaySpinBox->setSuffix(tr(" s")); + delaySpinBox->setMaximum(60); + connect(delaySpinBox, SIGNAL(valueChanged(int)), this, SLOT(updateCheckBox())); + + delaySpinBoxLabel = new QLabel(tr("Screenshot Delay:")); + + hideThisWindowCheckBox = new QCheckBox(tr("Hide This Window")); + + optionsGroupBoxLayout = new QGridLayout; + optionsGroupBoxLayout->addWidget(delaySpinBoxLabel, 0, 0); + optionsGroupBoxLayout->addWidget(delaySpinBox, 0, 1); + optionsGroupBoxLayout->addWidget(hideThisWindowCheckBox, 1, 0, 1, 2); + optionsGroupBox->setLayout(optionsGroupBoxLayout); +} +//! [7] + +//! [8] +void Screenshot::createButtonsLayout() +{ + newScreenshotButton = createButton(tr("New Screenshot"), + this, SLOT(newScreenshot())); + + saveScreenshotButton = createButton(tr("Save Screenshot"), + this, SLOT(saveScreenshot())); + + quitScreenshotButton = createButton(tr("Quit"), this, SLOT(close())); + + buttonsLayout = new QHBoxLayout; + buttonsLayout->addStretch(); + buttonsLayout->addWidget(newScreenshotButton); + buttonsLayout->addWidget(saveScreenshotButton); + buttonsLayout->addWidget(quitScreenshotButton); +} +//! [8] + +//! [9] +QPushButton *Screenshot::createButton(const QString &text, QWidget *receiver, + const char *member) +{ + QPushButton *button = new QPushButton(text); + button->connect(button, SIGNAL(clicked()), receiver, member); + return button; +} +//! [9] + +//! [10] +void Screenshot::updateScreenshotLabel() +{ + screenshotLabel->setPixmap(originalPixmap.scaled(screenshotLabel->size(), + Qt::KeepAspectRatio, + Qt::SmoothTransformation)); +} +//! [10] |