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Diffstat (limited to 'examples/widgets/itemviews/pixelator/mainwindow.cpp')
| -rw-r--r-- | examples/widgets/itemviews/pixelator/mainwindow.cpp | 261 |
1 files changed, 0 insertions, 261 deletions
diff --git a/examples/widgets/itemviews/pixelator/mainwindow.cpp b/examples/widgets/itemviews/pixelator/mainwindow.cpp deleted file mode 100644 index 591123b187..0000000000 --- a/examples/widgets/itemviews/pixelator/mainwindow.cpp +++ /dev/null @@ -1,261 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** BSD License Usage -** Alternatively, 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 The Qt Company Ltd 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 "mainwindow.h" -#include "imagemodel.h" -#include "pixeldelegate.h" - -#include <QtWidgets> -#if defined(QT_PRINTSUPPORT_LIB) -#include <QtPrintSupport/qtprintsupportglobal.h> -#if QT_CONFIG(printdialog) -#include <QPrinter> -#include <QPrintDialog> -#endif -#endif - -//! [0] -MainWindow::MainWindow() -{ -//! [0] - currentPath = QDir::homePath(); - model = new ImageModel(this); - - QWidget *centralWidget = new QWidget; - -//! [1] - view = new QTableView; - view->setShowGrid(false); - view->horizontalHeader()->hide(); - view->verticalHeader()->hide(); - view->horizontalHeader()->setMinimumSectionSize(1); - view->verticalHeader()->setMinimumSectionSize(1); - view->setModel(model); -//! [1] - -//! [2] - PixelDelegate *delegate = new PixelDelegate(this); - view->setItemDelegate(delegate); -//! [2] - -//! [3] - QLabel *pixelSizeLabel = new QLabel(tr("Pixel size:")); - QSpinBox *pixelSizeSpinBox = new QSpinBox; - pixelSizeSpinBox->setMinimum(4); - pixelSizeSpinBox->setMaximum(32); - pixelSizeSpinBox->setValue(12); -//! [3] - - QMenu *fileMenu = new QMenu(tr("&File"), this); - QAction *openAction = fileMenu->addAction(tr("&Open...")); - openAction->setShortcuts(QKeySequence::Open); - - printAction = fileMenu->addAction(tr("&Print...")); - printAction->setEnabled(false); - printAction->setShortcut(QKeySequence::Print); - - QAction *quitAction = fileMenu->addAction(tr("E&xit")); - quitAction->setShortcuts(QKeySequence::Quit); - - QMenu *helpMenu = new QMenu(tr("&Help"), this); - QAction *aboutAction = helpMenu->addAction(tr("&About")); - - menuBar()->addMenu(fileMenu); - menuBar()->addSeparator(); - menuBar()->addMenu(helpMenu); - - connect(openAction, &QAction::triggered, this, &MainWindow::chooseImage); - connect(printAction, &QAction::triggered, this, &MainWindow::printImage); - connect(quitAction, &QAction::triggered, qApp, &QCoreApplication::quit); - connect(aboutAction, &QAction::triggered, this, &MainWindow::showAboutBox); -//! [4] - connect(pixelSizeSpinBox, &QSpinBox::valueChanged, - delegate, &PixelDelegate::setPixelSize); - connect(pixelSizeSpinBox, &QSpinBox::valueChanged, - this, &MainWindow::updateView); -//! [4] - - QHBoxLayout *controlsLayout = new QHBoxLayout; - controlsLayout->addWidget(pixelSizeLabel); - controlsLayout->addWidget(pixelSizeSpinBox); - controlsLayout->addStretch(1); - - QVBoxLayout *mainLayout = new QVBoxLayout; - mainLayout->addWidget(view); - mainLayout->addLayout(controlsLayout); - centralWidget->setLayout(mainLayout); - - setCentralWidget(centralWidget); - - setWindowTitle(tr("Pixelator")); - resize(640, 480); -//! [5] -} -//! [5] - -void MainWindow::chooseImage() -{ - QString fileName = QFileDialog::getOpenFileName(this, - tr("Choose an image"), currentPath, "*"); - - if (!fileName.isEmpty()) - openImage(fileName); -} - -void MainWindow::openImage(const QString &fileName) -{ - QImage image; - - if (image.load(fileName)) { - model->setImage(image); - if (!fileName.startsWith(":/")) { - currentPath = fileName; - setWindowTitle(tr("%1 - Pixelator").arg(currentPath)); - } - - printAction->setEnabled(true); - updateView(); - } -} - -void MainWindow::printImage() -{ -#if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printdialog) - if (model->rowCount(QModelIndex())*model->columnCount(QModelIndex()) > 90000) { - QMessageBox::StandardButton answer; - answer = QMessageBox::question(this, tr("Large Image Size"), - tr("The printed image may be very large. Are you sure that " - "you want to print it?"), - QMessageBox::Yes | QMessageBox::No); - if (answer == QMessageBox::No) - return; - } - - QPrinter printer(QPrinter::HighResolution); - - QPrintDialog dlg(&printer, this); - dlg.setWindowTitle(tr("Print Image")); - - if (dlg.exec() != QDialog::Accepted) { - return; - } - - QPainter painter; - painter.begin(&printer); - - int rows = model->rowCount(QModelIndex()); - int columns = model->columnCount(QModelIndex()); - int sourceWidth = (columns + 1) * ItemSize; - int sourceHeight = (rows + 1) * ItemSize; - - painter.save(); - - double xscale = printer.pageRect(QPrinter::DevicePixel).width() / double(sourceWidth); - double yscale = printer.pageRect(QPrinter::DevicePixel).height() / double(sourceHeight); - double scale = qMin(xscale, yscale); - - painter.translate(printer.paperRect(QPrinter::DevicePixel).x() + printer.pageRect(QPrinter::DevicePixel).width() / 2, - printer.paperRect(QPrinter::DevicePixel).y() + printer.pageRect(QPrinter::DevicePixel).height() / 2); - painter.scale(scale, scale); - painter.translate(-sourceWidth / 2, -sourceHeight / 2); - - QStyleOptionViewItem option; - QModelIndex parent = QModelIndex(); - - QProgressDialog progress(tr("Printing..."), tr("Cancel"), 0, rows, this); - progress.setWindowModality(Qt::ApplicationModal); - float y = ItemSize / 2; - - for (int row = 0; row < rows; ++row) { - progress.setValue(row); - qApp->processEvents(); - if (progress.wasCanceled()) - break; - - float x = ItemSize / 2; - - for (int column = 0; column < columns; ++column) { - option.rect = QRect(int(x), int(y), ItemSize, ItemSize); - view->itemDelegate()->paint(&painter, option, - model->index(row, column, parent)); - x = x + ItemSize; - } - y = y + ItemSize; - } - progress.setValue(rows); - - painter.restore(); - painter.end(); - - if (progress.wasCanceled()) { - QMessageBox::information(this, tr("Printing canceled"), - tr("The printing process was canceled."), QMessageBox::Cancel); - } -#else - QMessageBox::information(this, tr("Printing canceled"), - tr("Printing is not supported on this Qt build"), QMessageBox::Cancel); -#endif -} - -void MainWindow::showAboutBox() -{ - QMessageBox::about(this, tr("About the Pixelator example"), - tr("This example demonstrates how a standard view and a custom\n" - "delegate can be used to produce a specialized representation\n" - "of data in a simple custom model.")); -} - -//! [6] -void MainWindow::updateView() -{ - view->resizeColumnsToContents(); - view->resizeRowsToContents(); -} -//! [6] |