FileChooserDialog

FileChooserDialog
	Chapter 5. Dialogs

The Hildon::FileChooserDialog is the Maemo equivalent for the Gtk::FileChooserDialog. As it is derived from Gtk::FileChooser you can use the same API.

Unlike the Gtk::FileChooserDialog, this dialog already has OK and Cancel buttons, so you should not use add_button() to add buttons with explicit action names, such as Open or Save.

Reference

The documentation for the standard gtkmm Gtk::FileChooser API can be found in the gtkmm tutorial.

void show_file_chooser()
{   
  Hildon::FileChooserDialog dialog(*this, Gtk::FILE_CHOOSER_ACTION_OPEN);
    
  int response = dialog.run();
  dialog.hide();

  //Handle the response:
  switch(response)
  {
    case(Gtk::RESPONSE_OK):
    {
      std::string filename = dialog.get_filename();
      // Do something with filename
      break;
    }
    case(Gtk::RESPONSE_CANCEL):
    {
      // Cancel clicked
      break;
    }
    default:
    {
      break;
    }
  }
}

Some parts of the example will be explained in detail:

Hildon::FileChooserDialog dialog(*this, Gtk::FILE_CHOOSER_ACTION_OPEN);

This creates a new file chooser dialog for opening files, and specifies the window for which it should be transient. The following options are available for the dialog:

Gtk::FILE_CHOOSER_ACTION_OPEN: The file chooser will only allow the user to pick an existing file.
Gtk::FILE_CHOOSER_ACTION_SAVE: The file chooser will allow the user to pick an existing file, or type in a new filename.
Gtk::FILE_CHOOSER_ACTION_SELECT_FOLDER: The file chooser will allow the user to pick an existing folder.
Gtk::FILE_CHOOSER_ACTION_CREATE_FOLDER: The file chooser will allow the user to name an existing or new folder.

std::string filename = dialog.get_filename();

This is the most important method of the Gtk::FileChooser interface because here you can receive the file chosen in the dialog.

Example

Here is the full example code for the FileChooserDialog:

Figure 5.4. FileChooser

Source Code

File: examplewindow.h

#ifndef _MAEMOMM_EXAMPLEWINDOW_H
#define _MAEMOMM_EXAMPLEWINDOW_H

#include <hildonmm/window.h>
#include <hildonmm/button.h>
#include <gtkmm/buttonbox.h>

class ExampleWindow : public Hildon::Window
{
public:
  ExampleWindow();
  virtual ~ExampleWindow();

private:
  // Signal handlers:
  void on_button_file_clicked();
  void on_button_folder_clicked();

  // Child widgets:
  Gtk::VButtonBox box_;
  Hildon::Button button_file_;
  Hildon::Button button_folder_;
};

#endif /* _MAEMOMM_EXAMPLEWINDOW_H */

File: main.cc

#include <hildonmm.h>
#include <hildon-fmmm.h>
#include "examplewindow.h"

int main(int argc, char *argv[])
{
  Gtk::Main kit(argc, argv);
  Hildon::init();

  Hildon::fm_init();
  
  ExampleWindow window;
  kit.run(window); //Shows the window and returns when it is closed.

  return 0;
}

File: examplewindow.cc

#include "examplewindow.h"
#include <hildon-fmmm/file-chooser-dialog.h>
#include <iostream>

ExampleWindow::ExampleWindow() :
  button_file_(Gtk::Hildon::SIZE_HALFSCREEN_WIDTH |
    Gtk::Hildon::SIZE_FINGER_HEIGHT, Hildon::BUTTON_ARRANGEMENT_VERTICAL,
    "Click Me",
    "to select a file"),
  button_folder_(Gtk::Hildon::SIZE_HALFSCREEN_WIDTH |
    Gtk::Hildon::SIZE_FINGER_HEIGHT, Hildon::BUTTON_ARRANGEMENT_VERTICAL,
    "Click Me",
    "to select a folder")
{
  set_title("Hildon::FileChooserDialog Example");

  add(box_);

  box_.pack_start(button_file_);
  button_file_.signal_clicked().connect(
    sigc::mem_fun(*this, &ExampleWindow::on_button_file_clicked));

  box_.pack_start(button_folder_);
  button_folder_.signal_clicked().connect(
    sigc::mem_fun(*this, &ExampleWindow::on_button_folder_clicked));

  show_all_children();
}

ExampleWindow::~ExampleWindow()
{
}

void ExampleWindow::on_button_folder_clicked()
{
  Hildon::FileChooserDialog dialog(*this,
    Gtk::FILE_CHOOSER_ACTION_SELECT_FOLDER);

  int response = dialog.run();

  // Handle the response:
  switch(response)
  {
    case(Gtk::RESPONSE_OK):
    {
      std::cout << "Select clicked." << std::endl;
      std::cout << "Folder selected: " << dialog.get_filename() << std::endl;
      break;
    }
    case(Gtk::RESPONSE_CANCEL):
    {
      std::cout << "Cancel clicked." << std::endl;
      break;
    }
    default:
    {
      std::cout << "Unexpected button clicked." << std::endl;
      break;
    }
  }
}

void ExampleWindow::on_button_file_clicked()
{
  Hildon::FileChooserDialog dialog(*this, Gtk::FILE_CHOOSER_ACTION_OPEN);
 
  // Add filters, so that only certain file types can be selected:

  Gtk::FileFilter filter_text;
  filter_text.set_name("Text Files");
  filter_text.add_mime_type("text/plain");
  dialog.add_filter(filter_text);

  Gtk::FileFilter filter_cpp;
  filter_cpp.set_name("C/C++ Files");
  filter_cpp.add_mime_type("text/x-c");
  filter_cpp.add_mime_type("text/x-c++");
  filter_cpp.add_mime_type("text/x-c-header");
  dialog.add_filter(filter_cpp);
  
  Gtk::FileFilter filter_any;
  filter_any.set_name("Any Files");
  filter_any.add_pattern("*");
  dialog.add_filter(filter_any);

  //Show the dialog and wait for a user response:
  int response = dialog.run();

  //Handle the response:
  switch(response)
  {
    case(Gtk::RESPONSE_OK):
    {
      std::cout << "Open clicked." << std::endl;

      //Notice that this is a std::string, not a Glib::ustring:
      std::string filename = dialog.get_filename();
      std::cout << "File selected: " <<  filename << std::endl;
      break;
    }
    case(Gtk::RESPONSE_CANCEL):
    {
      std::cout << "Cancel clicked." << std::endl;
      break;
    }
    default:
    {
      std::cout << "Unexpected button clicked." << std::endl;
      break;
    }
  }
  
}


WizardDialog		FileDetailsDialog