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use timer to check filesystem; refs #155

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This commit is contained in:
Marc Wäckerlin
2012-05-16 12:04:03 +00:00
parent 7e381d1bf3
commit 7d47d245c9
1 changed files with 16 additions and 18 deletions
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34
src/qbrowserlib/filestorage.hxx
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@@ -9,9 +9,10 @@
#include <QtCore/QFile>
#include <QtCore/QDir>
#include <QtCore/QFileInfo>
#include <QtCore/QFileSystemWatcher>
#include <QtCore/QString>
#include <QtCore/QStringList>
#include <QtCore/QTimer>
#include <QtCore/QDateTime>
#include <cassert>
@@ -59,24 +60,22 @@ class FileStorage: public Storage {
Q_OBJECT;
public:
/*! @param file full path to storage file */
FileStorage(QString file): _file(file) {
FileStorage(QString file, int msec=1000): _file(file), _fileInfo(_file) {
TRC; LOG<<"file: "<<file;
_watcher.addPath(QFileInfo(_file).absolutePath());
assert(connect(&_watcher, SIGNAL(directoryChanged(const QString&)),
SLOT(setupWatcher())));
assert(connect(&_watcher, SIGNAL(fileChanged(const QString&)),
SLOT(emitChanged())));
assert(connect(&_timer, SIGNAL(timeout()), SLOT(check())));
_timer.setInterval(msec);
_timer.start();
}
QString name() {
return _file.fileName();
}
bool readable() {
return QFileInfo(_file).exists();
return _fileInfo.exists();
}
bool writeable() {
return readable() ||
(!_file.fileName().isEmpty() &&
QFileInfo(_file).absoluteDir().exists());
_fileInfo.absoluteDir().exists());
}
QStringList read() {
TRC;
@@ -99,18 +98,17 @@ class FileStorage: public Storage {
return res;
}
private Q_SLOTS:
void setupWatcher() {
void check() {
TRC;
bool watching(_watcher.files().size());
if (watching) // remove watchlist if already existent
_watcher.removePaths(_watcher.files());
if (readable()) { // add file to watchlist
_watcher.addPath(_file.fileName());
if (!watching) // send change event if file is initially created
emitChanged();
if (_modified!=_fileInfo.lastModified()) {
LOG<<"file has been modified";
_modified = _fileInfo.lastModified();
emitChanged();
}
}
private:
QFile _file;
QFileSystemWatcher _watcher;
QFileInfo _fileInfo;
QDateTime _modified;
QTimer _timer;
};