gtkmain.c

gtk是linux一款强大的夸平台的图形化开发工具

static void
gtk_quit_destroy (GtkQuitFunction *quitf)
{
  if (quitf->destroy)
    quitf->destroy (quitf->data);
  g_mem_chunk_free (quit_mem_chunk, quitf);
}

static gint
gtk_quit_destructor (GtkObject **object_p)
{
  if (*object_p)
    gtk_object_destroy (*object_p);
  g_free (object_p);

  return FALSE;
}

void
gtk_quit_add_destroy (guint              main_level,
		      GtkObject         *object)
{
  GtkObject **object_p;

  g_return_if_fail (main_level > 0);
  g_return_if_fail (object != NULL);
  g_return_if_fail (GTK_IS_OBJECT (object));

  object_p = g_new (GtkObject*, 1);
  *object_p = object;
  gtk_signal_connect (object,
		      "destroy",
		      GTK_SIGNAL_FUNC (gtk_widget_destroyed),
		      object_p);
  gtk_quit_add (main_level, (GtkFunction) gtk_quit_destructor, object_p);
}

guint
gtk_quit_add (guint	  main_level,
	      GtkFunction function,
	      gpointer	  data)
{
  return gtk_quit_add_full (main_level, function, NULL, data, NULL);
}

void
gtk_quit_remove (guint id)
{
  GtkQuitFunction *quitf;
  GList *tmp_list;
  
  tmp_list = quit_functions;
  while (tmp_list)
    {
      quitf = tmp_list->data;
      
      if (quitf->id == id)
	{
	  quit_functions = g_list_remove_link (quit_functions, tmp_list);
	  g_list_free (tmp_list);
	  gtk_quit_destroy (quitf);
	  
	  return;
	}
      
      tmp_list = tmp_list->next;
    }
}

void
gtk_quit_remove_by_data (gpointer data)
{
  GtkQuitFunction *quitf;
  GList *tmp_list;
  
  tmp_list = quit_functions;
  while (tmp_list)
    {
      quitf = tmp_list->data;
      
      if (quitf->data == data)
	{
	  quit_functions = g_list_remove_link (quit_functions, tmp_list);
	  g_list_free (tmp_list);
	  gtk_quit_destroy (quitf);

	  return;
	}
      
      tmp_list = tmp_list->next;
    }
}

guint
gtk_timeout_add_full (guint32		 interval,
		      GtkFunction	 function,
		      GtkCallbackMarshal marshal,
		      gpointer		 data,
		      GtkDestroyNotify	 destroy)
{
  if (marshal)
    {
      GtkClosure *closure;

      closure = g_new (GtkClosure, 1);
      closure->marshal = marshal;
      closure->data = data;
      closure->destroy = destroy;

      return g_timeout_add_full (0, interval, 
				 gtk_invoke_idle_timeout,
				 closure,
				 gtk_destroy_closure);
    }
  else
    return g_timeout_add_full (0, interval, function, data, destroy);
}

guint
gtk_timeout_add (guint32     interval,
		 GtkFunction function,
		 gpointer    data)
{
  return g_timeout_add_full (0, interval, function, data, NULL);
}

void
gtk_timeout_remove (guint tag)
{
  g_source_remove (tag);
}

guint
gtk_idle_add_full (gint			priority,
		   GtkFunction		function,
		   GtkCallbackMarshal	marshal,
		   gpointer		data,
		   GtkDestroyNotify	destroy)
{
  if (marshal)
    {
      GtkClosure *closure;

      closure = g_new (GtkClosure, 1);
      closure->marshal = marshal;
      closure->data = data;
      closure->destroy = destroy;

      return g_idle_add_full (priority,
			      gtk_invoke_idle_timeout,
			      closure,
			      gtk_destroy_closure);
    }
  else
    return g_idle_add_full (priority, function, data, destroy);
}

guint
gtk_idle_add (GtkFunction function,
	      gpointer	  data)
{
  return g_idle_add_full (GTK_PRIORITY_DEFAULT, function, data, NULL);
}

guint	    
gtk_idle_add_priority	(gint		    priority,
			 GtkFunction	    function,
			 gpointer	    data)
{
  return g_idle_add_full (priority, function, data, NULL);
}

void
gtk_idle_remove (guint tag)
{
  g_source_remove (tag);
}

void
gtk_idle_remove_by_data (gpointer data)
{
  if (!g_idle_remove_by_data (data))
    g_warning ("gtk_idle_remove_by_data(%p): no such idle", data);
}

guint
gtk_input_add_full (gint		source,
		    GdkInputCondition	condition,
		    GdkInputFunction	function,
		    GtkCallbackMarshal	marshal,
		    gpointer		data,
		    GtkDestroyNotify	destroy)
{
  if (marshal)
    {
      GtkClosure *closure;

      closure = g_new (GtkClosure, 1);
      closure->marshal = marshal;
      closure->data = data;
      closure->destroy = destroy;

      return gdk_input_add_full (source,
				 condition,
				 (GdkInputFunction) gtk_invoke_input,
				 closure,
				 (GdkDestroyNotify) gtk_destroy_closure);
    }
  else
    return gdk_input_add_full (source, condition, function, data, destroy);
}

void
gtk_input_remove (guint tag)
{
  g_source_remove (tag);
}

static void
gtk_destroy_closure (gpointer data)
{
  GtkClosure *closure = data;

  if (closure->destroy)
    (closure->destroy) (closure->data);
  g_free (closure);
}

static gboolean
gtk_invoke_idle_timeout (gpointer data)
{
  GtkClosure *closure = data;

  GtkArg args[1];
  gint ret_val = FALSE;
  args[0].name = NULL;
  args[0].type = GTK_TYPE_BOOL;
  args[0].d.pointer_data = &ret_val;
  closure->marshal (NULL, closure->data,  0, args);
  return ret_val;
}

static void
gtk_invoke_input (gpointer	    data,
		  gint		    source,
		  GdkInputCondition condition)
{
  GtkClosure *closure = data;

  GtkArg args[3];
  args[0].type = GTK_TYPE_INT;
  args[0].name = NULL;
  GTK_VALUE_INT(args[0]) = source;
  args[1].type = GTK_TYPE_GDK_INPUT_CONDITION;
  args[1].name = NULL;
  GTK_VALUE_FLAGS(args[1]) = condition;
  args[2].type = GTK_TYPE_NONE;
  args[2].name = NULL;

  closure->marshal (NULL, closure->data, 2, args);
}

GdkEvent*
gtk_get_current_event (void)
{
  if (current_events)
    return gdk_event_copy ((GdkEvent *) current_events->data);
  else
    return NULL;
}

GtkWidget*
gtk_get_event_widget (GdkEvent *event)
{
  GtkWidget *widget;

  widget = NULL;
  if (event && event->any.window)
    gdk_window_get_user_data (event->any.window, (void**) &widget);
  
  return widget;
}

static void
gtk_exit_func (void)
{
  if (gtk_initialized)
    {
      gtk_initialized = FALSE;
      gtk_preview_uninit ();
    }
}


static gint
gtk_quit_invoke_function (GtkQuitFunction *quitf)
{
  if (!quitf->marshal)
    return quitf->function (quitf->data);
  else
    {
      GtkArg args[1];
      gint ret_val = FALSE;

      args[0].name = NULL;
      args[0].type = GTK_TYPE_BOOL;
      args[0].d.pointer_data = &ret_val;
      ((GtkCallbackMarshal) quitf->marshal) (NULL,
					     quitf->data,
					     0, args);
      return ret_val;
    }
}

void
gtk_propagate_event (GtkWidget *widget,
		     GdkEvent  *event)
{
  gint handled_event;
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_WIDGET (widget));
  g_return_if_fail (event != NULL);
  
  handled_event = FALSE;

  if ((event->type == GDK_KEY_PRESS) ||
      (event->type == GDK_KEY_RELEASE))
    {
      /* Only send key events within Window widgets to the Window
       *  The Window widget will in turn pass the
       *  key event on to the currently focused widget
       *  for that window.
       */
      GtkWidget *window;

      window = gtk_widget_get_ancestor (widget, GTK_TYPE_WINDOW);
      if (window)
        {
	  if (GTK_WIDGET_IS_SENSITIVE (window))
	    gtk_widget_event (window, event);

          handled_event = TRUE; /* don't send to widget */
        }
    }
  
  /* Other events get propagated up the widget tree
   *  so that parents can see the button and motion
   *  events of the children.
   */
  while (!handled_event && widget)
    {
      GtkWidget *tmp;

      gtk_widget_ref (widget);
      handled_event = !GTK_WIDGET_IS_SENSITIVE (widget) || gtk_widget_event (widget, event);
      tmp = widget->parent;
      gtk_widget_unref (widget);
      widget  = tmp;
    }
}

#if 0
static void
gtk_error (gchar *str)
{
  gtk_print (str);
}

static void
gtk_warning (gchar *str)
{
  gtk_print (str);
}

static void
gtk_message (gchar *str)
{
  gtk_print (str);
}

static void
gtk_print (gchar *str)
{
  static GtkWidget *window = NULL;
  static GtkWidget *text;
  static int level = 0;
  GtkWidget *box1;
  GtkWidget *box2;
  GtkWidget *table;
  GtkWidget *hscrollbar;
  GtkWidget *vscrollbar;
  GtkWidget *separator;
  GtkWidget *button;
  
  if (level > 0)
    {
      fputs (str, stdout);
      fflush (stdout);
      return;
    }
  
  if (!window)
    {
      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
      
      gtk_signal_connect (GTK_OBJECT (window), "destroy",
			  (GtkSignalFunc) gtk_widget_destroyed,
			  &window);
      
      gtk_window_set_title (GTK_WINDOW (window), "Messages");
      
      box1 = gtk_vbox_new (FALSE, 0);
      gtk_container_add (GTK_CONTAINER (window), box1);
      gtk_widget_show (box1);
      
      
      box2 = gtk_vbox_new (FALSE, 10);
      gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
      gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);
      gtk_widget_show (box2);
      
      
      table = gtk_table_new (2, 2, FALSE);
      gtk_table_set_row_spacing (GTK_TABLE (table), 0, 2);
      gtk_table_set_col_spacing (GTK_TABLE (table), 0, 2);
      gtk_box_pack_start (GTK_BOX (box2), table, TRUE, TRUE, 0);
      gtk_widget_show (table);
      
      text = gtk_text_new (NULL, NULL);
      gtk_text_set_editable (GTK_TEXT (text), FALSE);
      gtk_table_attach_defaults (GTK_TABLE (table), text, 0, 1, 0, 1);
      gtk_widget_show (text);
      gtk_widget_realize (text);
      
      hscrollbar = gtk_hscrollbar_new (GTK_TEXT (text)->hadj);
      gtk_table_attach (GTK_TABLE (table), hscrollbar, 0, 1, 1, 2,
			GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
      gtk_widget_show (hscrollbar);
      
      vscrollbar = gtk_vscrollbar_new (GTK_TEXT (text)->vadj);
      gtk_table_attach (GTK_TABLE (table), vscrollbar, 1, 2, 0, 1,
			GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
      gtk_widget_show (vscrollbar);
      
      separator = gtk_hseparator_new ();
      gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, TRUE, 0);
      gtk_widget_show (separator);
      
      
      box2 = gtk_vbox_new (FALSE, 10);
      gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
      gtk_box_pack_start (GTK_BOX (box1), box2, FALSE, TRUE, 0);
      gtk_widget_show (box2);
      
      
      button = gtk_button_new_with_label ("close");
      gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
				 (GtkSignalFunc) gtk_widget_hide,
				 GTK_OBJECT (window));
      gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
      GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
      gtk_widget_grab_default (button);
      gtk_widget_show (button);
    }
  
  level += 1;
  gtk_text_insert (GTK_TEXT (text), NULL, NULL, NULL, str, -1);
  level -= 1;
  
  if (!GTK_WIDGET_VISIBLE (window))
    gtk_widget_show (window);
}
#endif