qdesigner_actions.cpp

来自「奇趣公司比较新的qt/emd版本」· C++ 代码 · 共 1,325 行 · 第 1/3 页

bool QDesignerActions::openForm(QWidget *parent)
{
#ifdef NONMODAL_PREVIEW
    closePreview();
#endif
    const QString extension = getFileExtension(core());
    const QStringList fileNames = QFileDialog::getOpenFileNames(parent, tr("Open Form"),
        m_openDirectory, tr("Designer UI files (*.%1);;All Files (*)").arg(extension), 0, QFileDialog::DontUseSheet);

    if (fileNames.isEmpty())
        return false;

    bool atLeastOne = false;
    foreach (QString fileName, fileNames) {
        if (readInForm(fileName) && !atLeastOne)
            atLeastOne = true;
    }

    return atLeastOne;
}

bool QDesignerActions::saveFormAs(QDesignerFormWindowInterface *fw)
{
    const QString extension = getFileExtension(core());

    QString dir = fw->fileName();
    if (dir.isEmpty()) {
        do {
            // Build untitled name
            if (!m_saveDirectory.isEmpty()) {
                dir = m_saveDirectory;
                break;
            }
            if (!m_openDirectory.isEmpty()) {
                dir = m_openDirectory;
                break;
            }
            dir = QDir::current().absolutePath();
        } while (false);
        dir += QDir::separator();
        dir += QLatin1String("untitled.");
        dir += extension;
    }

    QString saveFile;
    while (1) {
        saveFile = QFileDialog::getSaveFileName(fw, tr("Save form as"),
                dir,
                tr("Designer UI files (*.%1);;All Files (*)").arg(extension), 0, QFileDialog::DontConfirmOverwrite);
        if (saveFile.isEmpty())
            return false;

        const QFileInfo fInfo(saveFile);
        if (fInfo.suffix().isEmpty() && !fInfo.fileName().endsWith(QLatin1Char('.')))
            saveFile.append(QLatin1Char('.')).append(extension);

        const QFileInfo fi(saveFile);
        if (!fi.exists())
            break;

        if (QMessageBox::warning(fw, tr("Save"), tr("%1 already exists.\nDo you want to replace it?")
                    .arg(fi.fileName()), QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes)
            break;

        dir = saveFile;
    }

    fw->setFileName(saveFile);
    return writeOutForm(fw, saveFile);
}

void QDesignerActions::saveForm()
{
    if (QDesignerFormWindowInterface *fw = core()->formWindowManager()->activeFormWindow()) {
        if (saveForm(fw))
            showStatusBarMessage(savedMessage(fw->fileName()));
    }
}

void QDesignerActions::saveAllForms()
{
    QString fileNames;
    QDesignerFormWindowManagerInterface *formWindowManager = core()->formWindowManager();
    if (const int totalWindows = formWindowManager->formWindowCount()) {
        const QString separator = QLatin1String(", ");
        for (int i = 0; i < totalWindows; ++i) {
            QDesignerFormWindowInterface *fw = formWindowManager->formWindow(i);
            if (fw && fw->isDirty()) {
                formWindowManager->setActiveFormWindow(fw);
                if (saveForm(fw)) {
                    if (!fileNames.isEmpty())
                        fileNames += separator;
                    fileNames += QFileInfo(fw->fileName()).fileName();
                } else {
                    break;
                }
            }
        }
    }

    if (!fileNames.isEmpty()) {
        showStatusBarMessage(savedMessage(fileNames));
    }
}

bool QDesignerActions::saveForm(QDesignerFormWindowInterface *fw)
{
    bool ret;
    if (fw->fileName().isEmpty())
        ret = saveFormAs(fw);
    else
        ret =  writeOutForm(fw, fw->fileName());
    return ret;
}

void QDesignerActions::closeForm()
{
#ifdef NONMODAL_PREVIEW
    if (closePreview())
        return;
#endif

    if (QDesignerFormWindowInterface *fw = core()->formWindowManager()->activeFormWindow())
        if (QWidget *parent = fw->parentWidget()) {
            if (QMdiSubWindow *mdiSubWindow = qobject_cast<QMdiSubWindow *>(parent->parentWidget())) {
                mdiSubWindow->close();
            } else {
                parent->close();
            }
        }
}

void QDesignerActions::saveFormAs()
{
    if (QDesignerFormWindowInterface *fw = core()->formWindowManager()->activeFormWindow()) {
        if (saveFormAs(fw))
            showStatusBarMessage(savedMessage(fw->fileName()));
    }
}

void QDesignerActions::saveFormAsTemplate()
{
    if (QDesignerFormWindowInterface *fw = core()->formWindowManager()->activeFormWindow()) {
        SaveFormAsTemplate dlg(fw, fw->window());
        dlg.exec();
    }
}

void QDesignerActions::notImplementedYet()
{
    QMessageBox::information(core()->topLevel(), tr("Designer"), tr("Feature not implemented yet!"));
}

void QDesignerActions::previewFormLater(QAction *action)
{
    qRegisterMetaType<QAction*>("QAction*");
    QMetaObject::invokeMethod(this, "previewForm", Qt::QueuedConnection,
                                Q_ARG(QAction*, action));
}

bool QDesignerActions::closePreview()
{
    if (m_previewWidget) {
        m_previewWidget->close();
        return true;
    }
    return false;
}

void QDesignerActions::previewForm(QAction *action)
{
#ifdef NONMODAL_PREVIEW
    closePreview();
#endif
    QDesignerFormWindowInterface *fw = core()->formWindowManager()->activeFormWindow();
    if (!fw)
        return;

    // Get style stored in action if any
    QString styleName;
    if (action) {
        const QVariant data = action->data();
        if (data.type() == QVariant::String)
            styleName = data.toString();
    }

    // create and have form builder display errors.
    QWidget *widget =  qdesigner_internal::QDesignerFormBuilder::createPreview(fw, styleName);
    if (!widget)
        return;

#ifdef Q_WS_WIN
    Qt::WindowFlags windwowFlags = (widget->windowType() == Qt::Window) ? Qt::Window | Qt::WindowMaximizeButtonHint : Qt::WindowFlags(Qt::Dialog);
#else
    // Only Dialogs have close buttons on mac
    // On linux we don't want additional item on task bar and don't want minimize button, we want the preview to be on top
    Qt::WindowFlags windwowFlags = Qt::Dialog;
#endif
    // Install filter for Escape key
    widget->setParent(fw->window(), windwowFlags);

#ifdef NONMODAL_PREVIEW
    connect(fw, SIGNAL(changed()), widget, SLOT(close()));
#else
    // Cannot do this on the Mac as the dialog would have no close button
    widget->setWindowModality(Qt::ApplicationModal);
#endif

    // Position over form window
    widget->setAttribute(Qt::WA_DeleteOnClose, true);
    widget->move(fw->mapToGlobal(QPoint(10, 10)));

    widget->installEventFilter(this);
    widget->show();
    m_previewWidget = widget;

#ifdef NONMODAL_PREVIEW
    updateCloseAction();
#endif
}

void QDesignerActions::fixActionContext()
{
    QList<QAction*> actions;
    actions += m_fileActions->actions();
    actions += m_editActions->actions();
    actions += m_toolActions->actions();
    actions += m_formActions->actions();
    actions += m_windowActions->actions();
    actions += m_helpActions->actions();

    foreach (QAction *a, actions) {
        a->setShortcutContext(Qt::ApplicationShortcut);
    }
}

bool QDesignerActions::readInForm(const QString &fileName)
{
    QString fn = fileName;

    // First make sure that we don't have this one open already.
    QDesignerFormWindowManagerInterface *formWindowManager = core()->formWindowManager();
    const int totalWindows = formWindowManager->formWindowCount();
    for (int i = 0; i < totalWindows; ++i) {
        QDesignerFormWindowInterface *w = formWindowManager->formWindow(i);
        if (w->fileName() == fn) {
            w->raise();
            formWindowManager->setActiveFormWindow(w);
            addRecentFile(fn);
            return true;
        }
    }

    // Otherwise load it.
    do {
        QString errorMessage;
        if (workbench()->openForm(fn, &errorMessage)) {
            addRecentFile(fn);
            m_openDirectory = QFileInfo(fn).absolutePath();
            return true;
        } else {
            // prompt to reload
            QMessageBox box(QMessageBox::Warning, tr("Read error"),
                            tr("%1\nDo you want to update the file location or generate a new form?").arg(errorMessage),
                            QMessageBox::Cancel, core()->topLevel());

            QPushButton *updateButton = box.addButton(tr("&Update"), QMessageBox::ActionRole);
            QPushButton *newButton    = box.addButton(tr("&New Form"), QMessageBox::ActionRole);
            box.exec();
            if (box.clickedButton() == box.button(QMessageBox::Cancel))
                return false;

            if (box.clickedButton() == updateButton) {
                const QString extension = getFileExtension(core());
                fn = QFileDialog::getOpenFileName(core()->topLevel(),
                                                  tr("Open Form"), m_openDirectory,
                                                  tr("Designer UI files (*.%1);;All Files (*)").arg(extension), 0, QFileDialog::DontUseSheet);

                if (fn.isEmpty())
                    return false;
            } else if (box.clickedButton() == newButton) {
                // If the file does not exist, but its directory, is valid, open the template with the editor file name set to it.
                // (called from command line).
                QString newFormFileName;
                const  QFileInfo fInfo(fn);
                if (!fInfo.exists()) {
                    // Normalize file name
                    const QString directory = fInfo.absolutePath();
                    if (QDir(directory).exists()) {
                        newFormFileName = directory;
                        newFormFileName  += QLatin1Char('/');
                        newFormFileName  += fInfo.fileName();
                    }
                }
                showNewFormDialog(newFormFileName);
                return false;
            }
        }
    } while (true);
    return true;
}

static QString createBackup(const QString &fileName)
{
    const QString suffix = QLatin1String(".bak");
    QString backupFile = fileName + suffix;
    QFileInfo fi(backupFile);
    int i = 0;
    while (fi.exists()) {
        backupFile = fileName + suffix + QString::number(++i);
        fi.setFile(backupFile);
    }

    if (QFile::copy(fileName, backupFile))
        return backupFile;
    return QString();
}

static void removeBackup(const QString &backupFile)
{
    if (!backupFile.isEmpty())
        QFile::remove(backupFile);
}

bool QDesignerActions::writeOutForm(QDesignerFormWindowInterface *fw, const QString &saveFile)
{
    Q_ASSERT(fw && !saveFile.isEmpty());

    QString backupFile;
    QFileInfo fi(saveFile);
    if (fi.exists())
        backupFile = createBackup(saveFile);

    const QByteArray utf8Array = fw->contents().toUtf8();
    m_workbench->updateBackup(fw);

    QFile f(saveFile);
    while (!f.open(QFile::WriteOnly)) {
        QMessageBox box(QMessageBox::Warning,
                        tr("Save Form?"),
                        tr("Could not open file"),
                        QMessageBox::NoButton, fw);

        box.setWindowModality(Qt::WindowModal);
        box.setInformativeText(tr("The file, %1, could not be opened"
                               "\nReason: %2"
                               "\nWould you like to retry or change your file?")
                                .arg(f.fileName()).arg(f.errorString()));
        QPushButton *retryButton = box.addButton(QMessageBox::Retry);
        retryButton->setDefault(true);
        QPushButton *switchButton = box.addButton(tr("Select New File"), QMessageBox::AcceptRole);
        QPushButton *cancelButton = box.addButton(QMessageBox::Cancel);
        box.exec();

        if (box.clickedButton() == cancelButton) {
            removeBackup(backupFile);
            return false;
        } else if (box.clickedButton() == switchButton) {
            QString extension = getFileExtension(core());
            const QString fileName = QFileDialog::getSaveFileName(fw, tr("Save form as"),
                                                                  QDir::current().absolutePath(),
                                                                  QLatin1String("*.") + extension);
            if (fileName.isEmpty()) {
                removeBackup(backupFile);
                return false;
            }
            if (f.fileName() != fileName) {
                removeBackup(backupFile);
                fi.setFile(fileName);
                backupFile = QString();
                if (fi.exists())
                    backupFile = createBackup(fileName);
            }
            f.setFileName(fileName);
            fw->setFileName(fileName);
        }
        // loop back around...
    }
    while (f.write(utf8Array, utf8Array.size()) != utf8Array.size()) {
        QMessageBox box(QMessageBox::Warning, tr("Save Form?"),
                        tr("Could not write file"),
                        QMessageBox::Retry|QMessageBox::Cancel, fw);
        box.setWindowModality(Qt::WindowModal);
        box.setInformativeText(tr("It was not possible to write the entire file, %1, to disk."
                                "\nReason:%2\nWould you like to retry?")
                                .arg(f.fileName()).arg(f.errorString()));
        box.setDefaultButton(QMessageBox::Retry);
        switch (box.exec()) {
        case QMessageBox::Retry:
            f.resize(0);
            break;
        default:
            return false;
        }
    }
    f.close();
    removeBackup(backupFile);
    addRecentFile(saveFile);
    m_saveDirectory = QFileInfo(f).absolutePath();

    fw->setDirty(false);
    fw->parentWidget()->setWindowModified(false);
    return true;
}

void QDesignerActions::shutdown()
{

    // Follow the idea from the Mac, i.e. send the Application a close event
    // and if it's accepted, quit.
    QCloseEvent ev;
    QApplication::sendEvent(qDesigner, &ev);
    if (ev.isAccepted())
        qDesigner->quit();
}

void QDesignerActions::activeFormWindowChanged(QDesignerFormWindowInterface *formWindow)
{
    const bool enable = formWindow != 0;
#ifdef NONMODAL_PREVIEW
    closePreview();
#endif

    m_saveFormAction->setEnabled(enable);
    m_saveFormAsAction->setEnabled(enable);
    m_saveAllFormsAction->setEnabled(enable);
    m_saveFormAsTemplateAction->setEnabled(enable);
    m_closeFormAction->setEnabled(enable);
    m_closeFormAction->setEnabled(enable);

    m_editWidgetsAction->setEnabled(enable);
    m_formSettings->setEnabled(enable);

    m_previewFormAction->setEnabled(enable);
    m_styleActions->setEnabled(enable);
}

void QDesignerActions::updateRecentFileActions()
{
    QDesignerSettings settings;
    QStringList files = settings.recentFilesList();