Hardware keys

Key	Description	Keyboard	Key-Event
	Move up	Arrow key up	GDK_Up
	Move down	Arrow key down	GDK_Down
	Move left	Arrow key left	GDK_Left
	Move down	Arrow key right	GDK_Right
	Select, Confirm	Return	GDK_Return
	Open menu	F4	GDK_F4
	Show home	F5	GDK_F5
	Full screen	F6	GDK_F6
	Increase / Zoom in / Volume up	F7	GDK_F7
	Decrease / Zoom out / Volume down	F8	GDK_F8

To receive an event if one of the keys is pressed you must use the key-pressed-event like the example below:

Source Code

File: examplewindow.h

#ifndef GTKMM_EXAMPLEWINDOW_H
#define GTKMM_EXAMPLEWINDOW_H

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

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

protected:
  //Signal handlers:
  virtual bool on_key_pressed(GdkEventKey* key);
  
};

#endif //GTKMM_EXAMPLEWINDOW_H

File: examplewindow.cc

#include "examplewindow.h"
#include <gtkmm.h>
#include <hildonmm/banner.h>

ExampleWindow::ExampleWindow() 
{
  signal_key_press_event().connect( 
      sigc::mem_fun(*this, &ExampleWindow::on_key_pressed) );

  show_all_children();
}

ExampleWindow::~ExampleWindow()
{
  
}

bool ExampleWindow::on_key_pressed(GdkEventKey* event)
{
  if(!event)
    return false;

  switch (event->keyval)
  {
    case GDK_Up:
      Hildon::Banner::show_information(*this, "Key Up");
      break;
    case GDK_Down:
      Hildon::Banner::show_information(*this, "Key Down");
      break;
    case GDK_Left:
      Hildon::Banner::show_information(*this, "Key Left");
      break;
    case GDK_Right:
      Hildon::Banner::show_information(*this, "Key Right");
      break;
    case GDK_Return:
      Hildon::Banner::show_information(*this, "Key Select");
      break;
    case GDK_Escape:
      Hildon::Banner::show_information(*this, "Key Cancel");
      break;
    case GDK_F4:
      Hildon::Banner::show_information(*this, "Open menu");
      break;
    case GDK_F5:
      Hildon::Banner::show_information(*this, "Show Home");
      break;
    case GDK_F6:
      Hildon::Banner::show_information(*this, "Full screen");
      break;
    case GDK_F7:
      Hildon::Banner::show_information(*this, "Increase");
      break;
    case GDK_F8:
      Hildon::Banner::show_information(*this, "Decrease");
      break;
    default:
      Hildon::Banner::show_information(*this, "Other key");
  }
  
  // Returning true would stop the event now
  return false;
}

File: main.cc

#include <hildonmm.h>
#include "examplewindow.h"
#include <iostream>

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

  osso_context_t* osso_context = osso_initialize("example", "0.0.1", TRUE /* deprecated parameter */, 0 /* Use default Glib main loop context */);
  if(!osso_context)
    std::cerr << "osso_initialize() failed." << std::endl;
  
  Glib::set_application_name("Hardware key example");
  
  // Create Window and set it to Program
  ExampleWindow window;
  Hildon::Program::get_instance()->add_window(window);
  
  // Begin the main application
  kit.run(window);
  
  osso_deinitialize(osso_context);

  return 0;
  
}