<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:xi="http://www.w3.org/2001/XInclude" type="guide" style="task" id="aboutdialog.c" xml:lang="el">

  <info>

    <title type="text">AboutDialog (C)</title>

    <link type="guide" xref="c#windows"/>

    <link type="seealso" xref="dialog.c"/>

    <link type="seealso" xref="messagedialog.c"/>

    <revision version="0.2" date="2012-08-07" status="draft"/>

    <credit type="author copyright">

      <name>Monica Kochofar</name>

      <email its:translate="no">monicakochofar@gmail.com</email>

      <years>2012</years>

    </credit>

    <desc>Εμφάνιση πληροφοριών για μια εφαρμογή</desc>

    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">

      <mal:name>Ελληνική μεταφραστική ομάδα GNOME</mal:name>

      <mal:email>team@gnome.gr</mal:email>

      <mal:years>2012-2015</mal:years>

    </mal:credit>

    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">

      <mal:name>Δημήτρης Σπίγγος</mal:name>

      <mal:email>dmtrs32@gmail.com</mal:email>

      <mal:years>2012, 2013</mal:years>

    </mal:credit>

    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">

      <mal:name>Μαρία Θουκιδίδου</mal:name>

      <mal:email>marablack3@gmail.com</mal:email>

      <mal:years>2014</mal:years>

    </mal:credit>

    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">

      <mal:name>Θάνος Τρυφωνίδης</mal:name>

      <mal:email>tomtryf@gmail.com</mal:email>

      <mal:years>2014, 2015</mal:years>

    </mal:credit>

  </info>

  <title>AboutDialog</title>

  <media type="image" mime="image/png" src="media/aboutdialog_GMenu.png"/>

  
Ένα παράδειγμα AboutDialog χρησιμοποιώντας Gtk.ApplicationWindow και μενού

  <note>
You need to be running Gtk3.4 or later for this to work
</note>

#include <gtk/gtk.h>

/* Callback function in which reacts to the "response" signal from the user in

 * the message dialog window.

 * This function is used to destroy the dialog window.

 */

static void

on_close (GtkDialog *dialog,

          gint       response_id,

          gpointer   user_data)

{

  /* This will cause the dialog to be destroyed */

  gtk_widget_destroy (GTK_WIDGET (dialog));

}

/* Callback function for the response signal "activate" related to the SimpleAction

 * "about_action".

 * This function is used to cause the about dialog window to popup.

 */

static void

about_cb (GSimpleAction *simple,

          GVariant      *parameter,

          gpointer       user_data)

{

  GtkWidget *about_dialog;

  about_dialog = gtk_about_dialog_new ();

  /* Lists of authors/ documentators to be used later, they must be initialized

   * in a null terminated array of strings.

   */

  const gchar *authors[] = {"GNOME Documentation Team", NULL};

  const gchar *documenters[] = {"GNOME Documentation Team", NULL};

  /* We fill in the information for the about dialog */

  gtk_about_dialog_set_program_name (GTK_ABOUT_DIALOG (about_dialog), "AboutDialog Example");

  gtk_about_dialog_set_copyright (GTK_ABOUT_DIALOG (about_dialog), "Copyright \xc2\xa9 2012 GNOME Documentation Team");

  gtk_about_dialog_set_authors (GTK_ABOUT_DIALOG (about_dialog), authors);

  gtk_about_dialog_set_documenters (GTK_ABOUT_DIALOG (about_dialog), documenters);

  gtk_about_dialog_set_website_label (GTK_ABOUT_DIALOG (about_dialog), "GNOME Developer Website");

  gtk_about_dialog_set_website (GTK_ABOUT_DIALOG (about_dialog), "http://developer.gnome.org");

  /* We do not wish to show the title, which in this case would be

   * "AboutDialog Example". We have to reset the title of the messagedialog

   * window after setting the program name.

   */

  gtk_window_set_title (GTK_WINDOW (about_dialog), "");

  /* To close the aboutdialog when "close" is clicked we connect the response

   * signal to on_close

   */

  g_signal_connect (GTK_DIALOG (about_dialog), "response",

                    G_CALLBACK (on_close), NULL);

  /* Show the about dialog */

  gtk_widget_show (about_dialog);

}

static void

activate (GtkApplication *app,

          gpointer        user_data)

{

  GtkWidget *window;

  GSimpleAction *about_action;

  /* Create a window with a title and a default size */

  window = gtk_application_window_new (app);

  gtk_window_set_title (GTK_WINDOW (window), "AboutDialog Example");

  gtk_window_set_default_size (GTK_WINDOW (window), 200, 200);

  /* Create a new simple action, giving it a NULL parameter type. It will

   * always be NULL for actions invoked from a menu. (e.g clicking on an "ok"

   * or "cancel" button)

   */

  about_action = g_simple_action_new ("about", NULL);

  /* Connect the "activate" signal to the appropriate callback function.

   * It will indicate that the action was just activated.

   */

  g_signal_connect (about_action, "activate", G_CALLBACK (about_cb),

                    GTK_WINDOW (window));

  /* Adds the about_action to the overall action map. An Action map is an

   * interface that contains a number of named GAction instances

   * (such as about_action)

   */

  g_action_map_add_action (G_ACTION_MAP (window), G_ACTION (about_action));

  gtk_widget_show_all (window);

}

/* Callback function for the response signal "activate" from the "quit" action

 * found in the function directly below.

 */

static void

quit_cb (GSimpleAction *simple,

         GVariant      *parameter,

         gpointer       user_data)

{

  GApplication *application = user_data;

  g_application_quit (application);

}

/* Startup function for the menu we are creating in this sample */

static void

startup (GApplication *app,

         gpointer      user_data)

{

  GMenu *menu;

  GSimpleAction *quit_action;

  /* Initialize the GMenu, and add a menu item with label "About" and action

   * "win.about". Also add another menu item with label "Quit" and action

   * "app.quit"

   */

  menu = g_menu_new ();

  g_menu_append (menu, "About", "win.about");

  g_menu_append (menu, "Quit", "app.quit");

  /* Create a new simple action for the application. (In this case it is the

   * "quit" action.

   */

  quit_action = g_simple_action_new ("quit", NULL);

  /* Ensure that the menu we have just created is set for the overall application */

  gtk_application_set_app_menu (GTK_APPLICATION (app), G_MENU_MODEL (menu));

  g_signal_connect (quit_action,

                    "activate",

                    G_CALLBACK (quit_cb),

                    app);

  g_action_map_add_action (G_ACTION_MAP (app), G_ACTION (quit_action));

}

/* Startup function for the application */

int

main (int argc, char **argv)

{

  GtkApplication *app;

  int status;

  app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);

  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);

  g_signal_connect (app, "startup", G_CALLBACK (startup), NULL);

  status = g_application_run (G_APPLICATION (app), argc, argv);

  g_object_unref (app);

  return status;

}

Σε αυτό το παράδειγμα χρησιμοποιήσαμε τα παρακάτω:

<list>

  <item>
<link href="http://developer.gnome.org/gtk3/3.4/GtkApplication.html">GtkApplication</link>
</item>

  <item>
<link href="http://developer.gnome.org/gtk3/3.4/GtkWindow.html">GtkWindow</link>
</item>

  <item>
<link href="http://developer.gnome.org/gtk3/stable/GtkAboutDialog.html">GtkAboutDialog</link>
</item>

  <item>
<link href="http://developer.gnome.org/gio/stable/GMenu.html">GMenu</link>
</item>

  <item>
<link href="http://developer.gnome.org/gio/stable/GActionMap.html">GActionMap</link>
</item>

</list>

</page>