filedialog.cxx

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/// \file
/// \ingroup tutorial_webgui
///
/// Example showing how RFileDialog can be used in sync and async modes.
/// \macro_code
///
/// \date 2019-11-01
/// \author Sergey Linev <S.Linev@gsi.de>
 
/*************************************************************************
 * Copyright (C) 1995-2023, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
// Normally file dialogs will be used inside other widgets as ui5 dialogs.
// By default, dialog starts in async mode - means macro immediately returns to command line
// To start OpenFile dialog in sync mode, call `root "filedialog.cxx(1)" -q`.
// Once file is selected, root execution will be stopped.
 
// macro must be here to let macro work on Windows
R__LOAD_LIBRARY(libROOTBrowserv7)
 
#include <ROOT/RFileDialog.hxx>
 
void filedialog(int kind = 0)
{
   std::string fileName;
 
   // example of sync methods, blocks until name is selected
   switch (kind) {
   case 1: fileName = ROOT::RFileDialog::OpenFile("OpenFile title"); break;
   case 2: fileName = ROOT::RFileDialog::SaveAs("SaveAs title", "newfile.xml"); break;
   case 3: fileName = ROOT::RFileDialog::NewFile("NewFile title", "test.txt"); break;
   }
 
   if (kind > 0) {
      printf("Selected file: %s\n", fileName.c_str());
      return;
   }
 
   auto dialog = std::make_shared<ROOT::RFileDialog>(ROOT::RFileDialog::kOpenFile, "OpenFile dialog in async mode");
 
   dialog->SetNameFilters({"C++ files (*.cxx *.cpp *.c *.C)", "ROOT files (*.root)", "Image files (*.png *.jpg *.jpeg)",
                           "Text files (*.txt)", "Any files (*)"});
 
   dialog->SetSelectedFilter("ROOT files");
 
   // use dialog capture to keep reference until file name is selected
   dialog->SetCallback([dialog](const std::string &res) mutable {
      printf("Selected file: %s\n", res.c_str());
 
      // cleanup dialog - actually not needed, lambda is cleaned up after that call anyway
      // dialog.reset();
   });
 
   dialog->Show();
}