qfiledialog.cpp

奇趣公司比较新的qt/emd版本

    can contain both the initial directory and initial selection
    /home/user/foo.txt

    \sa workingDirectory()
 */
QString QFileDialogPrivate::initialSelection(const QString &path)
{
    if (!path.isEmpty()) {
        QFileInfo info(path);
        if (!info.isDir())
            return info.fileName();
    }
    return QString();
}

/*!
 \reimp
*/
void QFileDialog::done(int result)
{
    QDialog::done(result);
}

/*!
 \reimp
*/
void QFileDialog::accept()
{
    Q_D(QFileDialog);
    QStringList files = selectedFiles();
    if (files.isEmpty())
        return;
    QString lineEditText = d->lineEdit()->text();
    // "hidden feature" type .. and then enter, and it will move up a dir
    // special case for ".."
    if (lineEditText == QLatin1String("..")) {
        d->_q_navigateToParent();
        bool block = d->qFileDialogUi->fileNameEdit->blockSignals(true);
        d->lineEdit()->selectAll();
        d->qFileDialogUi->fileNameEdit->blockSignals(block);
        return;
    }

    switch (d->fileMode) {
    case DirectoryOnly:
    case Directory: {
        QString fn = files.first();
        QFileInfo info(fn);
        if (!info.exists())
            info = QFileInfo(d->getEnvironmentVariable(fn));
        if (!info.exists()) {
#ifndef QT_NO_MESSAGEBOX
            QString message = tr("%1\nDirectory not found.\nPlease verify the "
                                          "correct directory name was given.");
            QMessageBox::warning(this, windowTitle(), message.arg(info.fileName()));
#endif // QT_NO_MESSAGEBOX
            return;
        }
        if (info.isDir()) {
            emit filesSelected(files);
            QDialog::accept();
        }
        return;
    }

    case AnyFile: {
        QString fn = files.first();
        QFileInfo info(fn);
        if (info.isDir()) {
            setDirectory(info.absoluteFilePath());
            d->lineEdit()->clear();
            return;
        }

        if (!info.exists()) {
            int maxNameLength = d->maxNameLength(info.path());
            if (maxNameLength >= 0 && info.fileName().length() > maxNameLength)
                return;
        }

        // check if we have to ask for permission to overwrite the file
        if (!info.exists() || !confirmOverwrite() || acceptMode() == AcceptOpen) {
            emit filesSelected(QStringList(fn));
            QDialog::accept();
#ifndef QT_NO_MESSAGEBOX
        } else {
            if (QMessageBox::warning(this, windowTitle(),
                                     tr("%1 already exists.\nDo you want to replace it?")
                                     .arg(info.fileName()),
                                     QMessageBox::Yes | QMessageBox::No, QMessageBox::No)
                == QMessageBox::Yes)
                emit filesSelected(QStringList(fn));
                QDialog::accept();
#endif
        }
        return;
    }

    case ExistingFile:
    case ExistingFiles:
        for (int i = 0; i < files.count(); ++i) {
            QFileInfo info(files.at(i));
            if (!info.exists())
                info = QFileInfo(d->getEnvironmentVariable(files.at(i)));
            if (!info.exists()) {
#ifndef QT_NO_MESSAGEBOX
                QString message = tr("%1\nFile not found.\nPlease verify the "
                                     "correct file name was given.");
                QMessageBox::warning(this, windowTitle(), message.arg(info.fileName()));
#endif // QT_NO_MESSAGEBOX
                return;
            }
            if (info.isDir()) {
                setDirectory(info.absoluteFilePath());
                d->lineEdit()->clear();
                return;
            }
        }
        emit filesSelected(files);
        QDialog::accept();
        return;
    }
}

/*!
    \internal

    Create widgets, layout and set default values
*/
void QFileDialogPrivate::init(const QString &directory, const QString &nameFilter,
                              const QString &caption)
{
    Q_Q(QFileDialog);
    if (!caption.isEmpty()) {
        useDefaultCaption = false;
        setWindowTitle = caption;
        q->setWindowTitle(caption);
    }

    createWidgets();
    createMenuActions();
    retranslateStrings();
    q->setFileMode(fileMode);

#ifndef QT_NO_SETTINGS
    QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));
    settings.beginGroup(QLatin1String("Qt"));
    q->restoreState(settings.value(QLatin1String("filedialog")).toByteArray());
#endif

    // Default case
    if (!nameFilter.isEmpty())
        q->setFilter(nameFilter);
    q->setAcceptMode(QFileDialog::AcceptOpen);
    q->setDirectory(workingDirectory(directory));
    q->selectFile(initialSelection(directory));

    qFileDialogUi->fileNameEdit->setFocus();

    _q_updateOkButton();
    q->resize(q->sizeHint());
}

/*!
    \internal

    Create the widgets, set properties and connections
*/
void QFileDialogPrivate::createWidgets()
{
    Q_Q(QFileDialog);
    model = new QFileSystemModel(q);
    model->setObjectName(QLatin1String("qt_filesystem_model"));
#ifdef Q_WS_MAC
    model->setNameFilterDisables(true);
#else
    model->setNameFilterDisables(false);
#endif
    QFileDialog::connect(model, SIGNAL(rootPathChanged(const QString &)),
            q, SLOT(_q_pathChanged(const QString &)));
    QFileDialog::connect(model, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
            q, SLOT(_q_rowsInserted(const QModelIndex &)));
    model->setReadOnly(false);

    qFileDialogUi = new Ui_QFileDialog();
    qFileDialogUi->setupUi(q);

    QList<QUrl> initialBookmarks;
    initialBookmarks << QUrl::fromLocalFile(QLatin1String(""))
                     << QUrl::fromLocalFile(QDir::homePath());
    qFileDialogUi->sidebar->init(model, initialBookmarks);
    QFileDialog::connect(qFileDialogUi->sidebar, SIGNAL(goToUrl(const QUrl &)),
                         q, SLOT(_q_goToUrl(const QUrl &)));

    QObject::connect(qFileDialogUi->buttonBox, SIGNAL(accepted()), q, SLOT(accept()));
    QObject::connect(qFileDialogUi->buttonBox, SIGNAL(rejected()), q, SLOT(reject()));

    urlModel = new QUrlModel(q);
    urlModel->showFullPath = true;
    urlModel->setFileSystemModel(model);
    qFileDialogUi->lookInCombo->setModel(urlModel);
    QObject::connect(qFileDialogUi->lookInCombo, SIGNAL(activated(QString)), q, SLOT(_q_goToDirectory(QString)));

    qFileDialogUi->lookInCombo->setInsertPolicy(QComboBox::NoInsert);
    qFileDialogUi->lookInCombo->setDuplicatesEnabled(false);

    // filename
    qFileDialogUi->fileNameEdit->init(this);
#ifndef QT_NO_SHORTCUT
    qFileDialogUi->fileNameLabel->setBuddy(qFileDialogUi->fileNameEdit);
#endif
#ifndef QT_NO_COMPLETER
    completer = new QFSCompletor(model, q);
    qFileDialogUi->fileNameEdit->setCompleter(completer);
    QObject::connect(qFileDialogUi->fileNameEdit, SIGNAL(textChanged(QString)),
            q, SLOT(_q_autoCompleteFileName(QString)));
#endif // QT_NO_COMPLETER
    QObject::connect(qFileDialogUi->fileNameEdit, SIGNAL(textChanged(QString)),
                     q, SLOT(_q_updateOkButton()));
    QObject::connect(qFileDialogUi->fileNameEdit, SIGNAL(returnPressed()), q, SLOT(accept()));

    // filetype
    qFileDialogUi->fileTypeCombo->setDuplicatesEnabled(false);
    qFileDialogUi->fileTypeCombo->setSizeAdjustPolicy(QComboBox::AdjustToMinimumContentsLength);
    qFileDialogUi->fileTypeCombo->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
    QObject::connect(qFileDialogUi->fileTypeCombo, SIGNAL(activated(const QString &)),
                     q, SLOT(_q_useNameFilter(const QString &)));
    QObject::connect(qFileDialogUi->fileTypeCombo, SIGNAL(activated(const QString &)),
                     q, SIGNAL(filterSelected(const QString &)));

    qFileDialogUi->listView->init(this);
    qFileDialogUi->listView->setModel(model);
    QObject::connect(qFileDialogUi->listView, SIGNAL(activated(QModelIndex)),
                     q, SLOT(_q_enterDirectory(QModelIndex)));
    QObject::connect(qFileDialogUi->listView, SIGNAL(customContextMenuRequested(QPoint)),
                    q, SLOT(_q_showContextMenu(QPoint)));
#ifndef QT_NO_SHORTCUT
    QShortcut *shortcut = new QShortcut(qFileDialogUi->listView);
    shortcut->setKey(QKeySequence(QLatin1String("Delete")));
    QObject::connect(shortcut, SIGNAL(activated()), q, SLOT(_q_deleteCurrent()));
#endif

    qFileDialogUi->treeView->init(this);
    qFileDialogUi->treeView->setModel(model);
    QHeaderView *treeHeader = qFileDialogUi->treeView->header();
    QFontMetrics fm(q->font());
    treeHeader->resizeSection(0, fm.width(QLatin1String("wwwwwwwwwwwwwwwwwwwwwwwwww")));
    treeHeader->resizeSection(1, fm.width(QLatin1String("128.88 GB")));
    treeHeader->resizeSection(2, fm.width(QLatin1String("mp3Folder")));
    treeHeader->resizeSection(3, fm.width(QLatin1String("10/29/81 02:02PM")));
    treeHeader->setContextMenuPolicy(Qt::ActionsContextMenu);

    QActionGroup *showActionGroup = new QActionGroup(q);
    showActionGroup->setExclusive(false);
    QObject::connect(showActionGroup, SIGNAL(triggered(QAction *)),
                     q, SLOT(_q_showHeader(QAction *)));;

    QAbstractItemModel *abstractModel = model;
#ifndef QT_NO_PROXYMODEL
    if (proxyModel)
        abstractModel = proxyModel;
#endif
    for (int i = 1; i < abstractModel->columnCount(QModelIndex()); ++i) {
        QAction *showHeader = new QAction(showActionGroup);
        showHeader->setCheckable(true);
        showHeader->setChecked(true);
        treeHeader->addAction(showHeader);
    }

    QItemSelectionModel *selModel = qFileDialogUi->treeView->selectionModel();
    qFileDialogUi->treeView->setSelectionModel(qFileDialogUi->listView->selectionModel());
    delete selModel;
    QObject::connect(qFileDialogUi->treeView, SIGNAL(activated(QModelIndex)),
                     q, SLOT(_q_enterDirectory(QModelIndex)));
    QObject::connect(qFileDialogUi->treeView, SIGNAL(customContextMenuRequested(QPoint)),
                     q, SLOT(_q_showContextMenu(QPoint)));
#ifndef QT_NO_SHORTCUT
    shortcut = new QShortcut(qFileDialogUi->treeView);
    shortcut->setKey(QKeySequence(QLatin1String("Delete")));
    QObject::connect(shortcut, SIGNAL(activated()), q, SLOT(_q_deleteCurrent()));
#endif

    // Selections
    QItemSelectionModel *selections = qFileDialogUi->listView->selectionModel();
    QObject::connect(selections, SIGNAL(selectionChanged(const QItemSelection &, const QItemSelection &)),
                     q, SLOT(_q_selectionChanged()));
    QObject::connect(selections, SIGNAL(currentChanged(QModelIndex,QModelIndex)),
                     q, SLOT(_q_currentChanged(QModelIndex)));
    qFileDialogUi->splitter->setStretchFactor(qFileDialogUi->splitter->indexOf(qFileDialogUi->splitter->widget(1)), QSizePolicy::Expanding);

    createToolButtons();
}

void QFileDialogPrivate::_q_showHeader(QAction *action)
{
    Q_Q(QFileDialog);
    QActionGroup *actionGroup = qobject_cast<QActionGroup*>(q->sender());
    qFileDialogUi->treeView->header()->setSectionHidden(actionGroup->actions().indexOf(action) + 1, !action->isChecked());
}

#ifndef QT_NO_PROXYMODEL
/*!
    \since 4.3

    Sets the model for the views to the given \a proxyModel.  This is useful if you
    want to modify the underlying model; for example, to add columns, filter
    data or add drives.

    Any existing proxy model will be removed, but not deleted.  The file dialog
    will take ownership of the \a proxyModel.

    \sa proxyModel()
*/
void QFileDialog::setProxyModel(QAbstractProxyModel *proxyModel)
{
    Q_D(QFileDialog);
    if ((!proxyModel && !d->proxyModel)
        || (proxyModel == d->proxyModel))
        return;

    QModelIndex idx = d->rootIndex();
    if (d->proxyModel) {
        disconnect(d->proxyModel, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
            this, SLOT(_q_rowsInserted(const QModelIndex &)));
    } else {
        disconnect(d->model, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
            this, SLOT(_q_rowsInserted(const QModelIndex &)));
    }

    if (proxyModel != 0) {
        proxyModel->setParent(this);
        d->proxyModel = proxyModel;
        proxyModel->setSourceModel(d->model);
        d->qFileDialogUi->listView->setModel(d->proxyModel);
        d->qFileDialogUi->treeView->setModel(d->proxyModel);
        connect(d->proxyModel, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
            this, SLOT(_q_rowsInserted(const QModelIndex &)));
    } else {
        d->proxyModel = 0;
        d->qFileDialogUi->listView->setModel(d->model);
        d->qFileDialogUi->treeView->setModel(d->model);
        connect(d->model, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
            this, SLOT(_q_rowsInserted(const QModelIndex &)));
    }
    QItemSelectionModel *selModel = d->qFileDialogUi->treeView->selectionModel();
    d->qFileDialogUi->treeView->setSelectionModel(d->qFileDialogUi->listView->selectionModel());
    delete selModel;
    d->setRootIndex(idx);

    // reconnect selection
    QItemSelectionModel *selections = d->qFileDialogUi->listView->selectionModel();
    QObject::connect(selections, SIGNAL(selectionChanged(const QItemSelection &, const QItemSelection &)),
                     this, SLOT(_q_selectionChanged()));
    QObject::connect(selections, SIGNAL(currentChanged(QModelIndex,QModelIndex)),
                     this, SLOT(_q_currentChanged(QModelIndex)));
}

/*!
    Returns the proxy model used by the file dialog.  By default no proxy is set.

    \sa setProxyModel()
*/
QAbstractProxyModel *QFileDialog::proxyModel() const
{
    Q_D(const QFileDialog);
    return d->proxyModel;
}
#endif // QT_NO_PROXYMODEL

/*!
    \internal

    Create tool buttons, set properties and connections
*/
void QFileDialogPrivate::createToolButtons()
{
    Q_Q(QFileDialog);
    qFileDialogUi->backButton->setIcon(q->style