/// \file

/// \ingroup tutorial_gui

/// This is a small ROOT macro to use Qt 3.3 class :[QFileDialog](https://doc.qt.io/archives/3.3/qfiledialog.html)

/// See: [https://doc.qt.io/archives/3.3/qfiledialog.html#getOpenFileNames](https://doc.qt.io/archives/3.3/qfiledialog.html#getOpenFileNames)

///

/// To use, invoke ACLiC from the ROOT prompt:

/// ~~~

/// root [] .x QtMultiFileDialog.C++

/// ~~~

///

/// To use it with no ACLiC, omit the trailing "++"

/// ~~~

/// root [] .x QtMultiFileDialog.C

/// ~~~

///

/// The QtMultiFileDialog creates TList of TObjString objects and

/// returns its pointer.

///

/// The "QtFileDialog.C" macro provides the simplified version of the "QtMultiFileDialog.C"

///

/// Option: you can change the look and feel of the Qt file dialog

/// by providing the optional parameter "style":

/// The number of the available styles is defined by your local

/// Qt installation.

/// Try: "windows", "motif", "kde", "platinum" etc

///

/// The full list of the Qt classes available from Cint is defined by

/// [by $ROOTSYS/cint/lib/qtclasses.h](http://root.bnl.gov/QtRoot/htmldoc/src/qtclasses.h.html)

///

/// All Qt classes can be used from ACLiC though.

///

/// \macro_code

///

/// \author Valeri Fine 23/03/2006

# include <QApplication>

# include <QStyle>

# include <QFileDialog>

# include <QStringList>

# include <QString>

# include "TObjString.h"

# include "TList.h"

# include <string>

TList *QtMultiFileDialog(const char *style="") {

QStyle *saveStyle = 0;

if (!QString(style).isEmpty()) {

saveStyle = QApplication::style();

QApplication::setStyle(style);

}

TList *listOfNames = new TList();

QStringList files = QFileDialog::getOpenFileNames ();

QStringList::Iterator it = files.begin();

while ( it != files.end() ) {

std::string flnm = (*it).toStdString();

printf ("Next file selected: %s\n", flnm.c_str() );

// Convert QString to TObjString and add it to the output

listOfNames->Add(new TObjString(flnm.c_str()));

++it;

}

// Restore the style

if (saveStyle) QApplication::setStyle(saveStyle);

printf ("\nThe TList of the file names contains:");

printf ("\n-------------------------------------\n");

listOfNames->ls();

return listOfNames;

}