gnome-devel-docs 3.18.1-1 / usr / share / help / fr / gnome-devel-demos / statusbar.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="statusbar.c" xml:lang="fr">
  <info>
    <title type="text">Statusbar (C)</title>
    <link type="guide" xref="c#buttons"/>
    <link type="seealso" xref="grid.c"/>
    <link type="seealso" xref="button.c"/>


    <revision version="0.1" date="2012-06-22" status="draft"/>

    <credit type="author copyright">
      <name>Monica Kochofar</name>
      <email its:translate="no">monicakochofar@gmail.com</email>
      <years>2012</years>
    </credit>

    <desc>Rapporte les messages d'information d'importance mineure pour l'utilisateur</desc>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Luc Rebert,</mal:name>
      <mal:email>traduc@rebert.name</mal:email>
      <mal:years>2011</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Alain Lojewski,</mal:name>
      <mal:email>allomervan@gmail.com</mal:email>
      <mal:years>2011-2012</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Luc Pionchon</mal:name>
      <mal:email>pionchon.luc@gmail.com</mal:email>
      <mal:years>2011</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Bruno Brouard</mal:name>
      <mal:email>annoa.b@gmail.com</mal:email>
      <mal:years>2011-12</mal:years>
    </mal:credit>
  
    <mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
      <mal:name>Luis Menina</mal:name>
      <mal:email>liberforce@freeside.fr</mal:email>
      <mal:years>2014</mal:years>
    </mal:credit>
  </info>

  <title>Barre de statut</title>

  <media type="image" mime="image/png" src="media/statusbar3.png"/>
  <p>Cette barre de statut sert à démontrer comment les messages sont empilés dans l'ordre « le dernier au-dessus ». Le message au sommet de la pile est toujours celui qui est affiché.</p>

      <code mime="text/x-csrc" style="numbered">
#include &lt;gtk/gtk.h&gt;



/*Callback function in which pushes an item onto the statusbar*/
static void 
push_item (GtkWidget *widget,
           gpointer   data)
{
  GtkWidget *status_bar = data;

  /*Create a context id, which is used to uniquely identify 
   *the source of a message*/
  guint context_id = gtk_statusbar_get_context_id (GTK_STATUSBAR (status_bar), 
                                                   "Statusbar example");

  /*Count is used to keep track of the amount of items 
  the user is pushing/popping*/
  static int count = 1;
  char hold_output[20];
  
  /*This is a safer form of the standard sprintf () function. The output is 
  guaranteed in this case to not exceed 20 characters, and the result is stored
  into the 'hold_output' variable*/
  g_snprintf (hold_output, 20, "Item %d", count++);
  gtk_statusbar_push (GTK_STATUSBAR (status_bar), 
                     context_id, 
                     hold_output);
}



/*Callback function that is used to pop an item off the statusbar*/
static void 
pop_item (GtkWidget *widget,
          gpointer   data )
{
  GtkWidget *status_bar = data;
  guint context_id = gtk_statusbar_get_context_id (GTK_STATUSBAR (status_bar), 
                                                   "Statusbar example");

  gtk_statusbar_pop (GTK_STATUSBAR (status_bar), context_id);
}



static void
activate (GtkApplication *app,
          gpointer        user_data)
{
    GtkWidget *grid;
    GtkWidget *window;
    GtkWidget *status_bar;
    GtkWidget *pop_button;
    GtkWidget *push_button;

    /*Create a window with a title, border width, and a default size**/
    window = gtk_application_window_new (app);
    gtk_window_set_default_size (GTK_WINDOW (window), 220, 100);
    gtk_window_set_title (GTK_WINDOW (window), "Statusbar Example");
    gtk_container_set_border_width (GTK_CONTAINER(window), 10);
    
    /*Create the status bar, which is held in the global variable*/
    status_bar = gtk_statusbar_new ();      
    
    /*Create the buttons with labels*/
    push_button = gtk_button_new_with_label ("push item");
    pop_button = gtk_button_new_with_label ("pop last item");
    
    /*Create the grid, and attach the buttons/statusbar accordingly*/
    grid = gtk_grid_new ();
    gtk_grid_attach (GTK_GRID (grid), push_button, 0,1,1,1);
    gtk_grid_attach (GTK_GRID (grid), pop_button, 0,2,1,1);
    gtk_grid_attach (GTK_GRID (grid), status_bar, 0,3,1,1);
    
    /*Connecting the clicked signals to the corresponding callback functions*/
    g_signal_connect (GTK_BUTTON (push_button), "clicked", 
                      G_CALLBACK (push_item), status_bar);
    g_signal_connect (GTK_BUTTON (pop_button), "clicked", 
                      G_CALLBACK (pop_item), status_bar);
    
    /*Attach the grid holding the child widgets onto the window, and show all*/
    gtk_container_add (GTK_CONTAINER (window), grid);
    gtk_widget_show_all (window);
}



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

  return status;
}
</code>
<p>Dans cet exemple, les éléments suivants sont utilisés :</p>
<list>
  <item><p><link href="http://developer.gnome.org/gtk3/3.4/GtkApplication.html">GtkApplication</link></p></item>
  <item><p><link href="http://developer.gnome.org/gtk3/3.4/GtkWindow.html">GtkWindow</link></p></item>
  <item><p><link href="http://developer.gnome.org/gtk3/stable/GtkStatusbar.html">GtkStatusBar</link></p></item>
  <item><p><link href="http://developer.gnome.org/glib/stable/glib-String-Utility-Functions.html#g-snprintf">String Utility Functions</link></p></item>
  <item><p><link href="http://developer.gnome.org/gtk3/stable/GtkGrid.html">GtkGrid</link></p></item>
</list>
</page>

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