#include <QtGui>#include "imagewindow.h"#include "ui_resizedialog.h"ImageWindow::ImageWindow(){    imageLabel = new QLabel;    imageLabel->setBackgroundRole(QPalette::Dark);    imageLabel->setAutoFillBackground(true);    imageLabel->setAlignment(Qt::AlignLeft | Qt::AlignTop);    setCentralWidget(imageLabel);    createActions();    createMenus();    statusBar()->showMessage(tr("Ready"), 2000);    connect(&thread, SIGNAL(transactionStarted(const QString &)),            statusBar(), SLOT(showMessage(const QString &)));    connect(&thread, SIGNAL(finished()),            this, SLOT(allTransactionsDone()));    setCurrentFile("");}void ImageWindow::closeEvent(QCloseEvent *event){    if (maybeSave()) {        event->accept();    } else {        event->ignore();    }}void ImageWindow::open(){    if (maybeSave()) {        QString fileName = QFileDialog::getOpenFileName(this);        if (!fileName.isEmpty())            loadFile(fileName);    }}bool ImageWindow::save(){    if (curFile.isEmpty()) {        return saveAs();    } else {        saveFile(curFile);        return true;    }}bool ImageWindow::saveAs(){    QString fileName = QFileDialog::getSaveFileName(this);    if (QFile::exists(fileName)) {        int r = QMessageBox::warning(this, tr("Image Pro"),                        tr("File %1 already exists.\n"                           "Do you want to overwrite it?")                        .arg(QDir::convertSeparators(fileName)),                        QMessageBox::Yes | QMessageBox::Default,                        QMessageBox::No | QMessageBox::Escape);        if (r == QMessageBox::No)            return true;    }    if (!fileName.isEmpty())        saveFile(fileName);    return true;}void ImageWindow::flipHorizontally(){    addTransaction(new FlipTransaction(Qt::Horizontal));}void ImageWindow::flipVertically(){    addTransaction(new FlipTransaction(Qt::Vertical));}void ImageWindow::resizeImage(){    QDialog dialog;    Ui::ResizeDialog ui;    ui.setupUi(&dialog);    ui.widthSpinBox->setValue(imageLabel->pixmap()->width());    ui.heightSpinBox->setValue(imageLabel->pixmap()->height());    if (dialog.exec()) {        QSize newSize(ui.widthSpinBox->value(),                      ui.heightSpinBox->value());        addTransaction(new ResizeTransaction(newSize));    }}void ImageWindow::convertTo32Bit(){    addTransaction(new ConvertDepthTransaction(32));}void ImageWindow::convertTo8Bit(){    addTransaction(new ConvertDepthTransaction(8));}void ImageWindow::convertTo1Bit(){    addTransaction(new ConvertDepthTransaction(1));}void ImageWindow::addTransaction(Transaction *transact){    thread.addTransaction(transact);    openAction->setEnabled(false);    saveAction->setEnabled(false);    saveAsAction->setEnabled(false);}void ImageWindow::about(){    QMessageBox::about(this, tr("About Image Pro"),            tr("<h2>Image Pro 1.1</h2>"               "<p>Copyright &copy; 2006 Software Inc."               "<p>Image Pro is a small application that demonstrates "               "signal-slot connections across threads."));}void ImageWindow::allTransactionsDone(){    openAction->setEnabled(true);    saveAction->setEnabled(true);    saveAsAction->setEnabled(true);    imageLabel->setPixmap(QPixmap::fromImage(thread.image()));    setWindowModified(true);    statusBar()->showMessage(tr("Ready"), 2000);}void ImageWindow::createActions(){    openAction = new QAction(tr("&Open..."), this);    openAction->setShortcut(tr("Ctrl+O"));    openAction->setStatusTip(tr("Open an existing image file"));    connect(openAction, SIGNAL(triggered()), this, SLOT(open()));    saveAction = new QAction(tr("&Save"), this);    saveAction->setShortcut(tr("Ctrl+S"));    saveAction->setStatusTip(tr("Save the image to disk"));    connect(saveAction, SIGNAL(triggered()), this, SLOT(save()));    saveAsAction = new QAction(tr("Save &As..."), this);    saveAsAction->setStatusTip(tr("Save the image under a new name"));    connect(saveAsAction, SIGNAL(triggered()), this, SLOT(saveAs()));    exitAction = new QAction(tr("E&xit"), this);    exitAction->setShortcut(tr("Ctrl+Q"));    exitAction->setStatusTip(tr("Exit the application"));    connect(exitAction, SIGNAL(triggered()), this, SLOT(close()));    flipHorizontallyAction = new QAction(tr("Flip &Horizontally"),                                         this);    flipHorizontallyAction->setShortcut(tr("Ctrl+H"));    flipHorizontallyAction->setStatusTip(tr("Flip the image "                                         "horizontally"));    connect(flipHorizontallyAction, SIGNAL(triggered()),            this, SLOT(flipHorizontally()));    flipVerticallyAction = new QAction(tr("Flip &Vertically"), this);    flipVerticallyAction->setShortcut(tr("Ctrl+V"));    flipVerticallyAction->setStatusTip(tr("Flip the image vertically"));    connect(flipVerticallyAction, SIGNAL(triggered()),            this, SLOT(flipVertically()));    resizeAction = new QAction(tr("&Resize..."), this);    resizeAction->setShortcut(tr("Ctrl+R"));    resizeAction->setStatusTip(tr("Resize the image"));    connect(resizeAction, SIGNAL(triggered()),            this, SLOT(resizeImage()));    convertTo32BitAction = new QAction(tr("32 Bit"), this);    convertTo32BitAction->setStatusTip(tr("Convert to 32-bit image"));    connect(convertTo32BitAction, SIGNAL(triggered()),            this, SLOT(convertTo32Bit()));    convertTo8BitAction = new QAction(tr("8 Bit"), this);    convertTo8BitAction->setStatusTip(tr("Convert to 8-bit image"));    connect(convertTo8BitAction, SIGNAL(triggered()),            this, SLOT(convertTo8Bit()));    convertTo1BitAction = new QAction(tr("1 Bit"), this);    convertTo1BitAction->setStatusTip(tr("Convert to 1-bit image"));    connect(convertTo1BitAction, SIGNAL(triggered()),            this, SLOT(convertTo1Bit()));    aboutAction = new QAction(tr("&About"), this);    aboutAction->setStatusTip(tr("Show the application's About box"));    connect(aboutAction, SIGNAL(triggered()), this, SLOT(about()));    aboutQtAction = new QAction(tr("About &Qt"), this);    aboutQtAction->setStatusTip(tr("Show the Qt library's About box"));    connect(aboutQtAction, SIGNAL(triggered()), qApp, SLOT(aboutQt()));}void ImageWindow::createMenus(){    fileMenu = menuBar()->addMenu(tr("&File"));    fileMenu->addAction(openAction);    fileMenu->addAction(saveAction);    fileMenu->addAction(saveAsAction);    fileMenu->addSeparator();    fileMenu->addAction(exitAction);    editMenu = menuBar()->addMenu(tr("&Edit"));    editMenu->addAction(flipHorizontallyAction);    editMenu->addAction(flipVerticallyAction);    editMenu->addAction(resizeAction);    editMenu->addSeparator();    convertToSubMenu = editMenu->addMenu(tr("&Convert to"));    convertToSubMenu->addAction(convertTo32BitAction);    convertToSubMenu->addAction(convertTo8BitAction);    convertToSubMenu->addAction(convertTo1BitAction);    menuBar()->addSeparator();    helpMenu = menuBar()->addMenu(tr("&Help"));    helpMenu->addAction(aboutAction);    helpMenu->addAction(aboutQtAction);}bool ImageWindow::maybeSave(){    if (isWindowModified()) {        int r = QMessageBox::warning(this, tr("Image Pro"),                        tr("The image has been modified.\n"                           "Do you want to save your changes?"),                        QMessageBox::Yes | QMessageBox::Default,                        QMessageBox::No,                        QMessageBox::Cancel | QMessageBox::Escape);        if (r == QMessageBox::Yes) {            return save();        } else if (r == QMessageBox::Cancel) {            return false;        }    }    return true;}void ImageWindow::loadFile(const QString &fileName){    QImage newImage;    QApplication::setOverrideCursor(Qt::WaitCursor);    bool loaded = newImage.load(fileName);    QApplication::restoreOverrideCursor();    if (loaded) {        thread.setImage(newImage);        imageFormat = QImageReader::imageFormat(fileName);        imageLabel->setPixmap(QPixmap::fromImage(newImage));        setCurrentFile(fileName);        statusBar()->showMessage(tr("File loaded"), 2000);    } else {        QMessageBox::warning(this, tr("Image Pro"),                             tr("Error when loading image."));        statusBar()->showMessage(tr("Loading canceled"), 2000);    }}void ImageWindow::saveFile(const QString &fileName){    QImage image = thread.image();    QApplication::setOverrideCursor(Qt::WaitCursor);    bool saved = image.save(fileName, imageFormat);    QApplication::restoreOverrideCursor();    if (saved) {        setCurrentFile(fileName);        statusBar()->showMessage(tr("File saved"), 2000);    } else {        statusBar()->showMessage(tr("Saving canceled"), 2000);    }}void ImageWindow::setCurrentFile(const QString &fileName){    curFile = fileName;    setWindowModified(false);    bool hasImage = !curFile.isEmpty();    if (hasImage) {        setWindowTitle(tr("%1[*] - %2").arg(strippedName(curFile))                                       .arg(tr("Image Pro")));    } else {        setWindowTitle(tr("Image Pro"));    }    saveAction->setEnabled(hasImage);    saveAsAction->setEnabled(hasImage);    flipHorizontallyAction->setEnabled(hasImage);    flipVerticallyAction->setEnabled(hasImage);    resizeAction->setEnabled(hasImage);    convertTo32BitAction->setEnabled(hasImage);    convertTo8BitAction->setEnabled(hasImage);    convertTo1BitAction->setEnabled(hasImage);}QString ImageWindow::strippedName(const QString &fullFileName){    return QFileInfo(fullFileName).fileName();}