gnome-devel-docs 3.28.0-1 / usr / share / help / cs / gnome-devel-demos / menubutton.c.page

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<?xml version="1.0" encoding="utf-8"?>
<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="menubutton.c" xml:lang="cs">
  <info>
  <title type="text">MenuButton</title>
    <link type="guide" xref="c#buttons"/>
    <revision version="0.1" date="2013-07-01" status="review"/>

    <credit type="author copyright">
      <name>Tiffany Antopolski</name>
      <email its:translate="no">tiffany.antopolski@gmail.com</email>
      <years>2013</years>
    </credit>

    <desc>Tlačítko, které po kliknutí zobrazí nabídku</desc>
  </info>

  <title>MenuButton</title>
  <media type="image" mime="image/png" src="media/menubutton.png"/>
  <p>Widget <code>GtkMenuButton</code> se používá k zobrazení nabídky po kliknutí na něj. Nabídka může být poskytnuta v podobě <code>GtkMenu</code> nebo jako abstraktní <code>GMenuModel</code>. Tlačítko může obsahovat libovolný platný synovský widget. To znamená, že může obsahovat většinu ostatních standardních potomků <code>GtkWidget</code>. Nejčastěji používaným vloženým widgetem je <code>GtkArrow</code>.</p>

  <note><p>Musíte používat GNOME 3.6 nebo novější, aby widget MenuButton fungoval.</p></note>

  <links type="section"/>
    
  <section id="code">
  <title>Kód použitý k vygenerování tohoto příkladu</title>
    <code mime="text/x-csrc" style="numbered">#include &lt;gtk/gtk.h&gt;

/* Funkce zpětného volání pro činnost Zpět */
static void
about_callback (GSimpleAction *simple,
               GVariant      *parameter,
               gpointer       user_data)
{
  g_print ("You clicked \"About\"\n");
}

static void
activate (GtkApplication *app,
          gpointer        user_data)
{
  GMenu *submenu;
  GtkWidget *grid;
  GMenu *menumodel;
  GtkWidget *window;
  GtkWidget *menubutton;
  GSimpleAction *about_action;

  window = gtk_application_window_new (app);
  grid = gtk_grid_new ();

  gtk_window_set_title (GTK_WINDOW (window), "MenuButton Example");
  gtk_window_set_default_size (GTK_WINDOW (window), 600, 400);

  menubutton = gtk_menu_button_new ();
  gtk_widget_set_size_request (menubutton, 80, 35);

  gtk_grid_attach (GTK_GRID (grid), menubutton, 0, 0, 1, 1);
  gtk_container_add (GTK_CONTAINER (window), grid);

  menumodel = g_menu_new ();
  g_menu_append (menumodel, "New", "app.new");
  g_menu_append (menumodel, "About", "win.about");

  submenu = g_menu_new ();
  g_menu_append_submenu (menumodel, "Other", G_MENU_MODEL (submenu));
  g_menu_append (submenu, "Quit", "app.quit");
  gtk_menu_button_set_menu_model (GTK_MENU_BUTTON (menubutton), G_MENU_MODEL (menumodel));

  about_action = g_simple_action_new ("about", NULL);
  g_signal_connect (about_action, "activate", G_CALLBACK (about_callback),
                    GTK_WINDOW (window));
  g_action_map_add_action (G_ACTION_MAP (window), G_ACTION (about_action));

  gtk_widget_show_all (window);
}


static void
new_callback (GSimpleAction *simple,
              GVariant      *parameter,
              gpointer       user_data)
{
  g_print ("You clicked \"New\"\n");
}

static void
quit_callback (GSimpleAction *simple,
               GVariant      *parameter,
               gpointer       user_data)
{
  GApplication *application = user_data;

  g_application_quit (application);
}

static void
startup (GApplication *app,
         gpointer      user_data)
{
  GSimpleAction *new_action;
  GSimpleAction *quit_action;

  new_action = g_simple_action_new ("new", NULL);
  g_signal_connect (new_action, "activate", G_CALLBACK (new_callback), app);
  g_action_map_add_action (G_ACTION_MAP (app), G_ACTION (new_action));

  quit_action = g_simple_action_new ("quit", NULL);
  g_signal_connect (quit_action, "activate", G_CALLBACK (quit_callback), app);
  g_action_map_add_action (G_ACTION_MAP (app), G_ACTION (quit_action));
}


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;
}
</code>
  </section>

  <section id="references">
  <title>Odkazy k API</title>
    <p>V této ukázce se používá následující:</p>
    <list>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkMenuButton.html">GtkMenuButton</link></p></item>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkMenu.html">GtkMenu</link></p></item>
      <item><p><link href="https://developer.gnome.org/gio/unstable/GMenuModel.html">GMenuModel</link></p></item>
      <item><p><link href="http://developer.gnome.org/gtk3/unstable/GtkArrow.html">GtkArrow</link></p></item>
    </list>
  </section>
</page>

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