To select multiple files and dirs using the same QFileDialog.

[nehaR]

Hi All,

I am working on Qt4.6 on mac os. What i want is, whenever i will open QFileDialog I will able to select both files and folders in the same filedialog at a time and also multiple selection of files and folders.

I tried to subclass QFileDialog for this but it not opens nativeDialog.

Is there any other way to open files and folders in the same QFileDialog.

Regards,
Neha

[ijabZhan]

I encountered the same questions. And I found a solution after googling in QT forums. The following is the codes that you could try(The original link is http://www.qtcentre.org/threads/34226-QFileDialog-select-multiple-directories?p=220108#post220108):

@QFileDialog* _f_dlg = new QFileDialog(this);
_f_dlg->setFileMode(QFileDialog::Directory);
_f_dlg->setOption(QFileDialog::DontUseNativeDialog, true);

// Try to select multiple files and directories at the same time in QFileDialog
QListView l = _f_dlg->findChild<QListView>("listView");
if (l) {
l->setSelectionMode(QAbstractItemView::MultiSelection);
}
QTreeView t = _f_dlg->findChild<QTreeView>();
if (t) {
t->setSelectionMode(QAbstractItemView::MultiSelection);
}

int nMode = _f_dlg->exec();
QStringList _fnames = _f_dlg->selectedFiles();@

[andre]

For such a selection, I find that using a custom dialog works better. I like having checkboxes in the tree for that, and I wrote a "proxy model":/wiki/QSortFilterProxyModel_subclass_to_add_a_checkbox to support doing that. However, that does mean crafting your own dialog box for the selection. The default platform one does not support it anyway. In my case, I opted to just include the whole tree view in my wizard itself.

[francomartins]

try is option :
@
QStringList ls = QFileDialog::getOpenFileNames();
@
return a QStringList of the selecteds Files .

[Frodox]

I have the same question.
I found this thread hardly, and ijabZhan's solution looks like what I need.. but it did not work correctly :(
I cannot select just one(or more) file, or 'file + folder' (in this direction).
I must select 'folder + file'. It didn't suit me, and the problem was in
@
void QFileDialog::accept () [virtual protected]
@

method (you could look in Qt's src ;-) ).

Luckily, I found a solution but in reality it consist of two solutions: above and founded.

Let's subclass QFileDialog:

sfdfiledialog.h
@
#ifndef SFDFILEDIALOG_HP
#define SFDFILEDIALOG_HP

#include <QFileDialog>

// SelectFileDirDialog
class SFDFileDialog : public QFileDialog
{
Q_OBJECT
public:
SFDFileDialog(QWidget * parent, Qt::WindowFlags flags );
SFDFileDialog(QWidget * parent = 0, const QString & caption = QString(),
const QString & directory = QString(),
const QString & filter = QString() );
~SFDFileDialog();

public slots:
void accept ();
};

#endif // SFDFILEDIALOG_HP
@

sfdfiledialog.cpp
@
#include "sfdfiledialog.h"
#include <QListView>
#include <QTreeView>

SFDFileDialog::SFDFileDialog(QWidget *parent, const QString &caption, const QString &directory, const QString &filter)
: QFileDialog(parent, caption, directory, filter)
{
// Try to select multiple files and directories at the same time in QFileDialog
QListView l = this->findChild<QListView>("listView");
if (l)
l->setSelectionMode(QAbstractItemView::ExtendedSelection);

QTreeView *t = this->findChild<QTreeView*>();
if (t)
    t->setSelectionMode(QAbstractItemView::ExtendedSelection);

}

SFDFileDialog::SFDFileDialog(QWidget *parent, Qt::WindowFlags flags)
: QFileDialog(parent,flags)
{
}

SFDFileDialog::~SFDFileDialog()
{
}

void SFDFileDialog::accept()
{
QStringList files = selectedFiles();
if (files.isEmpty())
return;
emit filesSelected(files);
QDialog::accept();
}
@

And now you can use it as you want, for example:
@
SFDFileDialog *file_dlg = new SFDFileDialog(this, "Select files:");
file_dlg->setFileMode(QFileDialog::ExistingFiles);

if ( !file_dlg->exec() ) {
qDebug() << "You select nothing.";
return;
}
QStringList _fnames = file_dlg->selectedFiles();

// debug
QStringList::const_iterator it;
for (it = _fnames.begin(); it != _fnames.end(); it++)
qDebug() << *it;
qDebug() << "-----------";

...
delete file_dlg;
@

As you noticed, I implanted ijabZhan ’s solution in Constructor of SFDFileDialog, because IMHO it's logically must be there and we have a great chance :) Also you could move it from Constructor, and call later (if you need multi-selection) as in ijabZhan’s post.

Solution was founded here:
http://www.qtcentre.org/threads/4810-QFileDialog-how-to-choice-File-or-Directory-in-the-same-Dialog

I hope it will help someone.

With Best Regards,
Frodox (:

[Frodox]

P.s. It work correctly for Qt 4.7.4 and I think for lesser versions too.
In 4.8.4 dialog close after clicking on 1 file, so it need some other hints.