main.cpp Example File

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#include <QApplication> #include <QQmlApplicationEngine> #include <QtQml> #include <QFileSystemModel> #include <QDateTime> #include <QDesktopServices> #include <QUrl> static inline QString permissionString(const QFileInfo &fi) { const QFile::Permissions permissions = fi.permissions(); QString result = QLatin1String("----------"); if (fi.isSymLink()) result[0] = QLatin1Char('l'); else if (fi.isDir()) result[0] = QLatin1Char('d'); if (permissions & QFileDevice::ReadUser) result[1] = QLatin1Char('r'); if (permissions & QFileDevice::WriteUser) result[2] = QLatin1Char('w'); if (permissions & QFileDevice::ExeUser) result[3] = QLatin1Char('x'); if (permissions & QFileDevice::ReadGroup) result[4] = QLatin1Char('r'); if (permissions & QFileDevice::WriteGroup) result[5] = QLatin1Char('w'); if (permissions & QFileDevice::ExeGroup) result[6] = QLatin1Char('x'); if (permissions & QFileDevice::ReadOther) result[7] = QLatin1Char('r'); if (permissions & QFileDevice::WriteOther) result[8] = QLatin1Char('w'); if (permissions & QFileDevice::ExeOther) result[9] = QLatin1Char('x'); return result; } static inline QString sizeString(const QFileInfo &fi) { if (!fi.isFile()) return QString(); const qint64 size = fi.size(); if (size > 1024 * 1024 * 10) return QString::number(size / (1024 * 1024)) + QLatin1Char('M'); if (size > 1024 * 10) return QString::number(size / 1024) + QLatin1Char('K'); return QString::number(size); } class DisplayFileSystemModel : public QFileSystemModel { Q_OBJECT public: explicit DisplayFileSystemModel(QObject *parent = Q_NULLPTR) : QFileSystemModel(parent) {} enum Roles { SizeRole = Qt::UserRole + 4, DisplayableFilePermissionsRole = Qt::UserRole + 5, LastModifiedRole = Qt::UserRole + 6, UrlStringRole = Qt::UserRole + 7 }; Q_ENUM(Roles) QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const Q_DECL_OVERRIDE { if (index.isValid() && role >= SizeRole) { switch (role) { case SizeRole: return QVariant(sizeString(fileInfo(index))); case DisplayableFilePermissionsRole: return QVariant(permissionString(fileInfo(index))); case LastModifiedRole: return QVariant(fileInfo(index).lastModified().toString(Qt::SystemLocaleShortDate)); case UrlStringRole: return QVariant(QUrl::fromLocalFile(filePath(index)).toString()); default: break; } } return QFileSystemModel::data(index, role); } QHash<int,QByteArray> roleNames() const Q_DECL_OVERRIDE { QHash<int, QByteArray> result = QFileSystemModel::roleNames(); result.insert(SizeRole, QByteArrayLiteral("size")); result.insert(DisplayableFilePermissionsRole, QByteArrayLiteral("displayableFilePermissions")); result.insert(LastModifiedRole, QByteArrayLiteral("lastModified")); return result; } }; int main(int argc, char *argv[]) { QApplication app(argc, argv); QQmlApplicationEngine engine; qmlRegisterUncreatableType<DisplayFileSystemModel>("io.qt.examples.quick.controls.filesystembrowser", 1, 0, "FileSystemModel", "Cannot create a FileSystemModel instance."); QFileSystemModel *fsm = new DisplayFileSystemModel(&engine); fsm->setRootPath(QDir::homePath()); fsm->setResolveSymlinks(true); engine.rootContext()->setContextProperty("fileSystemModel", fsm); engine.rootContext()->setContextProperty("rootPathIndex", fsm->index(fsm->rootPath())); engine.load(QUrl(QStringLiteral("qrc:///main.qml"))); if (engine.rootObjects().isEmpty()) return -1; return app.exec(); } #include "main.moc"

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