#include <qaction.h>#include <qapplication.h>#include <qfile.h>#include <qfiledialog.h>#include <qlabel.h>#include <qmenubar.h>#include <qmessagebox.h>#include <qpopupmenu.h>#include <qspinbox.h>#include <qstatusbar.h>#include "imagewindow.h"#include "resizedialog.h"ImageWindow::ImageWindow(QWidget *parent, const char *name)    : QMainWindow(parent, name){    thread.setTargetWidget(this);    imageLabel = new QLabel(this);    imageLabel->setSizePolicy(QSizePolicy::Ignored,                              QSizePolicy::Ignored);    imageLabel->setBackgroundMode(PaletteDark);    imageLabel->setAlignment(AlignLeft | AlignTop);    setCentralWidget(imageLabel);    createActions();    createMenus();    createStatusBar();    setCurrentFile("");    modified = false;}void ImageWindow::customEvent(QCustomEvent *event){    if ((int)event->type() == TransactionStart) {        TransactionStartEvent *startEvent =                (TransactionStartEvent *)event;        infoLabel->setText(startEvent->message);    } else if ((int)event->type() == AllTransactionsDone) {        openAct->setEnabled(true);        saveAct->setEnabled(true);        saveAsAct->setEnabled(true);        imageLabel->setPixmap(QPixmap(thread.image()));        infoLabel->setText(tr("Ready"));        modLabel->setText(tr("MOD"));        modified = true;        statusBar()->message(tr("Done"), 2000);    } else {        QMainWindow::customEvent(event);    }}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 ret = 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 (ret == QMessageBox::No)            return true;    }    if (!fileName.isEmpty())        saveFile(fileName);    return true;}void ImageWindow::flipHorizontally(){    addTransaction(new FlipTransaction(Horizontal));}void ImageWindow::flipVertically(){    addTransaction(new FlipTransaction(Vertical));}void ImageWindow::resizeImage(){    ResizeDialog dialog;    dialog.widthSpinBox->setValue(imageLabel->pixmap()->width());    dialog.heightSpinBox->setValue(imageLabel->pixmap()->height());    if (dialog.exec()) {        QSize newSize(dialog.widthSpinBox->value(),                      dialog.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);    openAct->setEnabled(false);    saveAct->setEnabled(false);    saveAsAct->setEnabled(false);}void ImageWindow::about(){    QMessageBox::about(this, tr("About Image Pro"),            tr("<h2>Image Pro 1.0</h2>"               "<p>Copyright &copy; 2003 Software Inc."               "<p>Image Pro is a small application that "               "demonstrates <b>QCustomEvent</b>, <b>QMutex</b>, "               "and <b>QThread</b>."));}void ImageWindow::createActions(){    openAct = new QAction(tr("&Open..."), tr("Ctrl+O"), this);    openAct->setStatusTip(tr("Open an existing image file"));    connect(openAct, SIGNAL(activated()),            this, SLOT(open()));    saveAct = new QAction(tr("&Save"), tr("Ctrl+S"), this);    saveAct->setStatusTip(tr("Save the image to disk"));    connect(saveAct, SIGNAL(activated()),            this, SLOT(save()));    saveAsAct = new QAction(tr("Save &As..."), 0, this);    saveAsAct->setStatusTip(tr("Save the image under a new name"));    connect(saveAsAct, SIGNAL(activated()),            this, SLOT(saveAs()));    exitAct = new QAction(tr("E&xit"), tr("Ctrl+Q"), this);    exitAct->setStatusTip(tr("Exit the application"));    connect(exitAct, SIGNAL(activated()),            this, SLOT(close()));    flipHorizontallyAct = new QAction(tr("Flip &Horizontally"),                                      tr("Ctrl+H"), this);    flipHorizontallyAct->setStatusTip(tr("Flip the image "                                         "horizontally"));    connect(flipHorizontallyAct, SIGNAL(activated()),            this, SLOT(flipHorizontally()));    flipVerticallyAct = new QAction(tr("Flip &Vertically"),                                    tr("Ctrl+V"), this);    flipVerticallyAct->setStatusTip(tr("Flip the image vertically"));    connect(flipVerticallyAct, SIGNAL(activated()),            this, SLOT(flipVertically()));    resizeAct = new QAction(tr("&Resize..."), tr("Ctrl+R"), this);    resizeAct->setStatusTip(tr("Resize the image"));    connect(resizeAct, SIGNAL(activated()),            this, SLOT(resizeImage()));    convertTo32BitAct = new QAction(tr("32 Bit"), 0, this);    convertTo32BitAct->setStatusTip(tr("Convert to 32-bit image"));    connect(convertTo32BitAct, SIGNAL(activated()),            this, SLOT(convertTo32Bit()));    convertTo8BitAct = new QAction(tr("8 Bit"), 0, this);    convertTo8BitAct->setStatusTip(tr("Convert to 8-bit image"));    connect(convertTo8BitAct, SIGNAL(activated()),            this, SLOT(convertTo8Bit()));    convertTo1BitAct = new QAction(tr("1 Bit"), 0, this);    convertTo1BitAct->setStatusTip(tr("Convert to 1-bit image"));    connect(convertTo1BitAct, SIGNAL(activated()),            this, SLOT(convertTo1Bit()));    aboutAct = new QAction(tr("&About"), 0, this);    aboutAct->setStatusTip(tr("Show the application's About box"));    connect(aboutAct, SIGNAL(activated()),            this, SLOT(about()));    aboutQtAct = new QAction(tr("About &Qt"), 0, this);    aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));    connect(aboutQtAct, SIGNAL(activated()),            qApp, SLOT(aboutQt()));}void ImageWindow::createMenus(){    fileMenu = new QPopupMenu(this);    openAct->addTo(fileMenu);    saveAct->addTo(fileMenu);    saveAsAct->addTo(fileMenu);    fileMenu->insertSeparator();    exitAct->addTo(fileMenu);    editMenu = new QPopupMenu(this);    flipHorizontallyAct->addTo(editMenu);    flipVerticallyAct->addTo(editMenu);    resizeAct->addTo(editMenu);    editMenu->insertSeparator();    convertToSubMenu = new QPopupMenu(this);    convertTo32BitAct->addTo(convertToSubMenu);    convertTo8BitAct->addTo(convertToSubMenu);    convertTo1BitAct->addTo(convertToSubMenu);    editMenu->insertItem(tr("&Convert to"), convertToSubMenu);    helpMenu = new QPopupMenu(this);    aboutAct->addTo(helpMenu);    aboutQtAct->addTo(helpMenu);    menuBar()->insertItem(tr("&File"), fileMenu);    menuBar()->insertItem(tr("&Edit"), editMenu);    menuBar()->insertSeparator();    menuBar()->insertItem(tr("&Help"), helpMenu);}void ImageWindow::createStatusBar(){    infoLabel = new QLabel(this);    modLabel = new QLabel(tr(" MOD "), this);    modLabel->setAlignment(AlignHCenter);    modLabel->setMinimumSize(modLabel->sizeHint());    modLabel->clear();    statusBar()->addWidget(infoLabel, 1);    statusBar()->addWidget(modLabel);    infoLabel->setText(tr("Ready"));}bool ImageWindow::maybeSave(){    if (modified) {        int ret = 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 (ret == QMessageBox::Yes)            return save();        else if (ret == QMessageBox::Cancel)            return false;    }    return true;}void ImageWindow::loadFile(const QString &fileName){    QImage newImage;    QApplication::setOverrideCursor(waitCursor);    bool loaded = newImage.load(fileName);    QApplication::restoreOverrideCursor();    if (loaded) {        thread.setImage(newImage);        imageFormat = QImage::imageFormat(fileName);        imageLabel->setPixmap(QPixmap(newImage));        setCurrentFile(fileName);        statusBar()->message(tr("File loaded"), 2000);    } else {        QMessageBox::warning(this, tr("Image Pro"),                             tr("Error when loading image."));        statusBar()->message(tr("Loading canceled"), 2000);    }}void ImageWindow::saveFile(const QString &fileName){    QImage image = thread.image();    QApplication::setOverrideCursor(waitCursor);    bool saved = image.save(fileName, imageFormat);    QApplication::restoreOverrideCursor();    if (saved) {        setCurrentFile(fileName);        statusBar()->message(tr("File saved"), 2000);    } else {        statusBar()->message(tr("Saving canceled"), 2000);    }}void ImageWindow::setCurrentFile(const QString &fileName){    curFile = fileName;    modLabel->clear();    modified = false;    bool hasImage = !curFile.isEmpty();    if (hasImage) {        setCaption(tr("%1 - %2").arg(strippedName(curFile))                                .arg(tr("Image Pro")));    } else {        setCaption(tr("Image Pro"));    }    saveAct->setEnabled(hasImage);    saveAsAct->setEnabled(hasImage);    flipHorizontallyAct->setEnabled(hasImage);    flipVerticallyAct->setEnabled(hasImage);    resizeAct->setEnabled(hasImage);    convertTo32BitAct->setEnabled(hasImage);    convertTo8BitAct->setEnabled(hasImage);    convertTo1BitAct->setEnabled(hasImage);}QString ImageWindow::strippedName(const QString &fullFileName){    return QFileInfo(fullFileName).fileName();}