QSettings - File chooser should remember the last directory
I upload a file from a location, then the next upload has to point the last uploaded location.
H开发者_如何学编程ow can I accomplish thus using QSettings
?
Before using QSettings
, I would suggest, in your main()
to set a few informations about your application and your company, informations that QSettings
will be using :
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
a.setApplicationName("test");
a.setOrganizationName("myorg");
a.setOrganizationDomain("myorg.com");
// etc...
return a.exec();
}
Then, when selecting a file with QFile::getOpenFileName()
(for instance), you can read from a key of QSetting
the last directory. Then, if the selected file is valid, you can store/update the content of the key :
void Widget::on_tbtFile_clicked() {
const QString DEFAULT_DIR_KEY("default_dir");
QSettings MySettings; // Will be using application informations
// for correct location of your settings
QString SelectedFile = QFileDialog::getOpenFileName(
this, "Select a file", MySettings.value(DEFAULT_DIR_KEY).toString());
if (!SelectedFile.isEmpty()) {
QDir CurrentDir;
MySettings.setValue(DEFAULT_DIR_KEY,
CurrentDir.absoluteFilePath(SelectedFile));
QMessageBox::information(
this, "Info", "You selected the file '" + SelectedFile + "'");
}
}
If you are talking about QFileDialog() you can specify the starting directory in the constructor:
QFileDialog::QFileDialog(QWidget * parent = 0, const QString & caption =
QString(), const QString & directory = QString(), const QString & filter =
QString())
Or you can use one of the helper functions like this one which also allow you to specify the starting directory:
QString QFileDialog::getOpenFileName(QWidget * parent = 0,
const QString & caption = QString(), const QString & dir = QString(),
const QString & filter = QString(), QString * selectedFilter = 0,
Options options = 0)
After each use, store the directory path that was selected and use it the next time you display the dialog.
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