9fe5139e73
Printsupport module is not that interesting in embedded environments, and it also does not compile at the moment for WEC7. Fixed qtbase examples to obey the availability of printsupport module. Change-Id: I960d1b628b9ca82450aa3b0df8dd101b2544ee12 Reviewed-by: Björn Breitmeyer <bjoern.breitmeyer@kdab.com> Reviewed-by: Andreas Holzammer <andreas.holzammer@kdab.com> Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
249 lines
7.9 KiB
C++
249 lines
7.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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** the names of its contributors may be used to endorse or promote
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** products derived from this software without specific prior written
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** permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtWidgets>
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#ifndef QT_NO_PRINTER
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#include <QPrinter>
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#include <QPrintDialog>
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#endif
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#include "imagemodel.h"
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#include "mainwindow.h"
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#include "pixeldelegate.h"
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//! [0]
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MainWindow::MainWindow()
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{
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//! [0]
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currentPath = QDir::homePath();
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model = new ImageModel(this);
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QWidget *centralWidget = new QWidget;
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//! [1]
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view = new QTableView;
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view->setShowGrid(false);
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view->horizontalHeader()->hide();
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view->verticalHeader()->hide();
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view->horizontalHeader()->setMinimumSectionSize(1);
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view->verticalHeader()->setMinimumSectionSize(1);
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view->setModel(model);
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//! [1]
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//! [2]
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PixelDelegate *delegate = new PixelDelegate(this);
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view->setItemDelegate(delegate);
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//! [2]
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//! [3]
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QLabel *pixelSizeLabel = new QLabel(tr("Pixel size:"));
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QSpinBox *pixelSizeSpinBox = new QSpinBox;
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pixelSizeSpinBox->setMinimum(4);
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pixelSizeSpinBox->setMaximum(32);
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pixelSizeSpinBox->setValue(12);
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//! [3]
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QMenu *fileMenu = new QMenu(tr("&File"), this);
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QAction *openAction = fileMenu->addAction(tr("&Open..."));
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openAction->setShortcuts(QKeySequence::Open);
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printAction = fileMenu->addAction(tr("&Print..."));
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printAction->setEnabled(false);
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printAction->setShortcut(QKeySequence::Print);
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QAction *quitAction = fileMenu->addAction(tr("E&xit"));
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quitAction->setShortcuts(QKeySequence::Quit);
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QMenu *helpMenu = new QMenu(tr("&Help"), this);
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QAction *aboutAction = helpMenu->addAction(tr("&About"));
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menuBar()->addMenu(fileMenu);
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menuBar()->addSeparator();
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menuBar()->addMenu(helpMenu);
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connect(openAction, SIGNAL(triggered()), this, SLOT(chooseImage()));
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connect(printAction, SIGNAL(triggered()), this, SLOT(printImage()));
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connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
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connect(aboutAction, SIGNAL(triggered()), this, SLOT(showAboutBox()));
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//! [4]
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connect(pixelSizeSpinBox, SIGNAL(valueChanged(int)),
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delegate, SLOT(setPixelSize(int)));
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connect(pixelSizeSpinBox, SIGNAL(valueChanged(int)),
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this, SLOT(updateView()));
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//! [4]
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QHBoxLayout *controlsLayout = new QHBoxLayout;
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controlsLayout->addWidget(pixelSizeLabel);
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controlsLayout->addWidget(pixelSizeSpinBox);
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controlsLayout->addStretch(1);
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QVBoxLayout *mainLayout = new QVBoxLayout;
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mainLayout->addWidget(view);
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mainLayout->addLayout(controlsLayout);
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centralWidget->setLayout(mainLayout);
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setCentralWidget(centralWidget);
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setWindowTitle(tr("Pixelator"));
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resize(640, 480);
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//! [5]
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}
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//! [5]
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void MainWindow::chooseImage()
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{
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QString fileName = QFileDialog::getOpenFileName(this,
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tr("Choose an image"), currentPath, "*");
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if (!fileName.isEmpty())
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openImage(fileName);
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}
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void MainWindow::openImage(const QString &fileName)
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{
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QImage image;
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if (image.load(fileName)) {
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model->setImage(image);
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if (!fileName.startsWith(":/")) {
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currentPath = fileName;
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setWindowTitle(tr("%1 - Pixelator").arg(currentPath));
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}
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printAction->setEnabled(true);
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updateView();
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}
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}
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void MainWindow::printImage()
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{
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#ifndef QT_NO_PRINTER
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if (model->rowCount(QModelIndex())*model->columnCount(QModelIndex())
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> 90000) {
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QMessageBox::StandardButton answer;
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answer = QMessageBox::question(this, tr("Large Image Size"),
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tr("The printed image may be very large. Are you sure that "
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"you want to print it?"),
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QMessageBox::Yes | QMessageBox::No);
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if (answer == QMessageBox::No)
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return;
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}
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QPrinter printer(QPrinter::HighResolution);
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QPrintDialog *dlg = new QPrintDialog(&printer, this);
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dlg->setWindowTitle(tr("Print Image"));
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if (dlg->exec() != QDialog::Accepted)
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return;
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QPainter painter;
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painter.begin(&printer);
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int rows = model->rowCount(QModelIndex());
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int columns = model->columnCount(QModelIndex());
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int sourceWidth = (columns+1) * ItemSize;
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int sourceHeight = (rows+1) * ItemSize;
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painter.save();
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double xscale = printer.pageRect().width()/double(sourceWidth);
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double yscale = printer.pageRect().height()/double(sourceHeight);
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double scale = qMin(xscale, yscale);
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painter.translate(printer.paperRect().x() + printer.pageRect().width()/2,
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printer.paperRect().y() + printer.pageRect().height()/2);
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painter.scale(scale, scale);
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painter.translate(-sourceWidth/2, -sourceHeight/2);
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QStyleOptionViewItem option;
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QModelIndex parent = QModelIndex();
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QProgressDialog progress(tr("Printing..."), tr("Cancel"), 0, rows, this);
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progress.setWindowModality(Qt::ApplicationModal);
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float y = ItemSize/2;
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for (int row = 0; row < rows; ++row) {
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progress.setValue(row);
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qApp->processEvents();
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if (progress.wasCanceled())
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break;
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float x = ItemSize/2;
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for (int column = 0; column < columns; ++column) {
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option.rect = QRect(int(x), int(y), ItemSize, ItemSize);
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view->itemDelegate()->paint(&painter, option,
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model->index(row, column, parent));
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x = x + ItemSize;
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}
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y = y + ItemSize;
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}
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progress.setValue(rows);
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painter.restore();
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painter.end();
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if (progress.wasCanceled()) {
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QMessageBox::information(this, tr("Printing canceled"),
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tr("The printing process was canceled."), QMessageBox::Cancel);
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}
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#else
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QMessageBox::information(this, tr("Printing canceled"),
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tr("Printing is not supported on this Qt build"), QMessageBox::Cancel);
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#endif
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}
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void MainWindow::showAboutBox()
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{
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QMessageBox::about(this, tr("About the Pixelator example"),
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tr("This example demonstrates how a standard view and a custom\n"
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"delegate can be used to produce a specialized representation\n"
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"of data in a simple custom model."));
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}
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//! [6]
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void MainWindow::updateView()
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{
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view->resizeColumnsToContents();
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view->resizeRowsToContents();
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}
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//! [6]
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