gtkbox.c

gtk是linux一款强大的夸平台的图形化开发工具

			     GtkWidget *child)
{
  g_return_if_fail (box != NULL);
  g_return_if_fail (GTK_IS_BOX (box));
  g_return_if_fail (child != NULL);

  gtk_box_pack_start (box, child, TRUE, TRUE, 0);
}

void
gtk_box_pack_end_defaults (GtkBox    *box,
			   GtkWidget *child)
{
  g_return_if_fail (box != NULL);
  g_return_if_fail (GTK_IS_BOX (box));
  g_return_if_fail (child != NULL);

  gtk_box_pack_end (box, child, TRUE, TRUE, 0);
}

void
gtk_box_set_homogeneous (GtkBox  *box,
			 gboolean homogeneous)
{
  g_return_if_fail (box != NULL);
  g_return_if_fail (GTK_IS_BOX (box));

  if ((homogeneous ? TRUE : FALSE) != box->homogeneous)
    {
      box->homogeneous = homogeneous ? TRUE : FALSE;
      gtk_widget_queue_resize (GTK_WIDGET (box));
    }
}

void
gtk_box_set_spacing (GtkBox *box,
		     gint    spacing)
{
  g_return_if_fail (box != NULL);
  g_return_if_fail (GTK_IS_BOX (box));

  if (spacing != box->spacing)
    {
      box->spacing = spacing;
      gtk_widget_queue_resize (GTK_WIDGET (box));
    }
}

void
gtk_box_reorder_child (GtkBox                   *box,
		       GtkWidget                *child,
		       gint                      position)
{
  GList *list;

  g_return_if_fail (box != NULL);
  g_return_if_fail (GTK_IS_BOX (box));
  g_return_if_fail (child != NULL);

  list = box->children;
  while (list)
    {
      GtkBoxChild *child_info;

      child_info = list->data;
      if (child_info->widget == child)
	break;

      list = list->next;
    }

  if (list && box->children->next)
    {
      GList *tmp_list;

      if (list->next)
	list->next->prev = list->prev;
      if (list->prev)
	list->prev->next = list->next;
      else
	box->children = list->next;

      tmp_list = box->children;
      while (position && tmp_list->next)
	{
	  position--;
	  tmp_list = tmp_list->next;
	}

      if (position)
	{
	  tmp_list->next = list;
	  list->prev = tmp_list;
	  list->next = NULL;
	}
      else
	{
	  if (tmp_list->prev)
	    tmp_list->prev->next = list;
	  else
	    box->children = list;
	  list->prev = tmp_list->prev;
	  tmp_list->prev = list;
	  list->next = tmp_list;
	}

      if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (box))
	gtk_widget_queue_resize (child);
    }
}

void
gtk_box_query_child_packing (GtkBox             *box,
			     GtkWidget          *child,
			     gboolean           *expand,
			     gboolean           *fill,
			     guint              *padding,
			     GtkPackType        *pack_type)
{
  GList *list;
  GtkBoxChild *child_info = NULL;

  g_return_if_fail (box != NULL);
  g_return_if_fail (GTK_IS_BOX (box));
  g_return_if_fail (child != NULL);

  list = box->children;
  while (list)
    {
      child_info = list->data;
      if (child_info->widget == child)
	break;

      list = list->next;
    }

  if (list)
    {
      if (expand)
	*expand = child_info->expand;
      if (fill)
	*fill = child_info->fill;
      if (padding)
	*padding = child_info->padding;
      if (pack_type)
	*pack_type = child_info->pack;
    }
}

void
gtk_box_set_child_packing (GtkBox               *box,
			   GtkWidget            *child,
			   gboolean              expand,
			   gboolean              fill,
			   guint                 padding,
			   GtkPackType           pack_type)
{
  GList *list;
  GtkBoxChild *child_info = NULL;

  g_return_if_fail (box != NULL);
  g_return_if_fail (GTK_IS_BOX (box));
  g_return_if_fail (child != NULL);

  list = box->children;
  while (list)
    {
      child_info = list->data;
      if (child_info->widget == child)
	break;

      list = list->next;
    }

  if (list)
    {
      child_info->expand = expand != FALSE;
      child_info->fill = fill != FALSE;
      child_info->padding = padding;
      if (pack_type == GTK_PACK_END)
	child_info->pack = GTK_PACK_END;
      else
	child_info->pack = GTK_PACK_START;

      if (GTK_WIDGET_VISIBLE (child) && GTK_WIDGET_VISIBLE (box))
	gtk_widget_queue_resize (child);
    }
}

static void
gtk_box_map (GtkWidget *widget)
{
  GtkBox *box;
  GtkBoxChild *child;
  GList *children;

  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_BOX (widget));

  box = GTK_BOX (widget);
  GTK_WIDGET_SET_FLAGS (box, GTK_MAPPED);

  children = box->children;
  while (children)
    {
      child = children->data;
      children = children->next;

      if (GTK_WIDGET_VISIBLE (child->widget) &&
	  !GTK_WIDGET_MAPPED (child->widget))
	gtk_widget_map (child->widget);
    }
}

static void
gtk_box_unmap (GtkWidget *widget)
{
  GtkBox *box;
  GtkBoxChild *child;
  GList *children;

  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_BOX (widget));

  box = GTK_BOX (widget);
  GTK_WIDGET_UNSET_FLAGS (box, GTK_MAPPED);

  children = box->children;
  while (children)
    {
      child = children->data;
      children = children->next;

      if (GTK_WIDGET_VISIBLE (child->widget) &&
	  GTK_WIDGET_MAPPED (child->widget))
	gtk_widget_unmap (child->widget);
    }
}

static void
gtk_box_draw (GtkWidget    *widget,
	      GdkRectangle *area)
{
  GtkBox *box;
  GtkBoxChild *child;
  GdkRectangle child_area;
  GList *children;
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_BOX (widget));
   
  if (GTK_WIDGET_DRAWABLE (widget))
    {
      box = GTK_BOX (widget);
	
      children = box->children;
      while (children)
	{
	  child = children->data;
	  children = children->next;
	     
	  if (GTK_WIDGET_DRAWABLE (child->widget) &&
	      gtk_widget_intersect (child->widget, area, &child_area))
	    gtk_widget_draw (child->widget, &child_area);
	}
    }
}

static gint
gtk_box_expose (GtkWidget      *widget,
		GdkEventExpose *event)
{
  GtkBox *box;
  GtkBoxChild *child;
  GdkEventExpose child_event;
  GList *children;

  g_return_val_if_fail (widget != NULL, FALSE);
  g_return_val_if_fail (GTK_IS_BOX (widget), FALSE);
  g_return_val_if_fail (event != NULL, FALSE);

  if (GTK_WIDGET_DRAWABLE (widget))
    {
      box = GTK_BOX (widget);

      child_event = *event;

      children = box->children;
      while (children)
	{
	  child = children->data;
	  children = children->next;

	  if (GTK_WIDGET_DRAWABLE (child->widget) &&
	      GTK_WIDGET_NO_WINDOW (child->widget) &&
	      gtk_widget_intersect (child->widget, &event->area, &child_event.area))
	    gtk_widget_event (child->widget, (GdkEvent*) &child_event);
	}
    }

  return FALSE;
}

static void
gtk_box_add (GtkContainer *container,
	     GtkWidget    *widget)
{
  g_return_if_fail (container != NULL);
  g_return_if_fail (GTK_IS_BOX (container));
  g_return_if_fail (widget != NULL);

  gtk_box_pack_start_defaults (GTK_BOX (container), widget);
}

static void
gtk_box_remove (GtkContainer *container,
		GtkWidget    *widget)
{
  GtkBox *box;
  GtkBoxChild *child;
  GList *children;

  g_return_if_fail (container != NULL);
  g_return_if_fail (GTK_IS_BOX (container));
  g_return_if_fail (widget != NULL);

  box = GTK_BOX (container);

  children = box->children;
  while (children)
    {
      child = children->data;

      if (child->widget == widget)
	{
	  gboolean was_visible;

	  was_visible = GTK_WIDGET_VISIBLE (widget);
	  gtk_widget_unparent (widget);

	  box->children = g_list_remove_link (box->children, children);
	  g_list_free (children);
	  g_free (child);

	  /* queue resize regardless of GTK_WIDGET_VISIBLE (container),
	   * since that's what is needed by toplevels.
	   */
	  if (was_visible)
	    gtk_widget_queue_resize (GTK_WIDGET (container));

	  break;
	}

      children = children->next;
    }
}

static void
gtk_box_forall (GtkContainer *container,
		gboolean      include_internals,
		GtkCallback   callback,
		gpointer      callback_data)
{
  GtkBox *box;
  GtkBoxChild *child;
  GList *children;

  g_return_if_fail (container != NULL);
  g_return_if_fail (GTK_IS_BOX (container));
  g_return_if_fail (callback != NULL);

  box = GTK_BOX (container);

  children = box->children;
  while (children)
    {
      child = children->data;
      children = children->next;

      if (child->pack == GTK_PACK_START)
	(* callback) (child->widget, callback_data);
    }

  children = g_list_last (box->children);
  while (children)
    {
      child = children->data;
      children = children->prev;

      if (child->pack == GTK_PACK_END)
	(* callback) (child->widget, callback_data);
    }
}