gtknotebook.c

gtk是linux一款强大的夸平台的图形化开发工具

  notebook->panel = gdk_window_new (widget->window, &attributes, 
				    attributes_mask);
  gtk_style_set_background (widget->style, notebook->panel, 
			    GTK_STATE_NORMAL);
  gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
  gdk_window_set_user_data (notebook->panel, widget);
}

static void
gtk_notebook_expose_tabs (GtkNotebook *notebook)
{
  GtkWidget *widget;
  GtkNotebookPage *page;
  GdkEventExpose event;
  gint border;

  widget = GTK_WIDGET (notebook);
  border = GTK_CONTAINER (notebook)->border_width;

  if (!GTK_WIDGET_MAPPED (notebook) || !notebook->first_tab)
    return;

  page = notebook->first_tab->data;

  event.type = GDK_EXPOSE;
  event.window = widget->window;
  event.count = 0;
  event.area.x = border;
  event.area.y = border;

  switch (notebook->tab_pos)
    {
    case GTK_POS_BOTTOM:
      event.area.y = (widget->allocation.height - border -
		      page->allocation.height -
		      widget->style->klass->ythickness);
      if (page != notebook->cur_page)
	event.area.y -= widget->style->klass->ythickness;
    case GTK_POS_TOP:
      event.area.width = widget->allocation.width - 2 * border;
      event.area.height = (page->allocation.height +
			   widget->style->klass->ythickness);
      if (page != notebook->cur_page)
	event.area.height += widget->style->klass->ythickness;
      break;
    case GTK_POS_RIGHT:
      event.area.x = (widget->allocation.width - border -
		      page->allocation.width -
		      widget->style->klass->xthickness);
      if (page != notebook->cur_page)
	event.area.x -= widget->style->klass->xthickness;
    case GTK_POS_LEFT:
      event.area.width = (page->allocation.width +
			  widget->style->klass->xthickness);
      event.area.height = widget->allocation.height - 2 * border;
      if (page != notebook->cur_page)
	event.area.width += widget->style->klass->xthickness;
      break;
    }	     
  gtk_widget_event (widget, (GdkEvent *) &event);
}

static void
gtk_notebook_focus_changed (GtkNotebook     *notebook,
                            GtkNotebookPage *old_page)
{
  g_return_if_fail (notebook != NULL);
  g_return_if_fail (GTK_IS_NOTEBOOK (notebook));

  if (GTK_WIDGET_DRAWABLE (notebook) && notebook->show_tabs) 
    {
      GdkRectangle area;

      if (notebook->focus_tab)
	{
	  GtkNotebookPage *page;

	  page = notebook->focus_tab->data;

	  area.x = page->tab_label->allocation.x - 1;
	  area.y = page->tab_label->allocation.y - 1;
	  area.width = page->tab_label->allocation.width + 2;
	  area.height = page->tab_label->allocation.height + 2;

	  gtk_notebook_draw_tab (notebook, page, &area);
	}

      if (old_page)
	{
	  area.x = old_page->tab_label->allocation.x - 1;
	  area.y = old_page->tab_label->allocation.y - 1;
	  area.width = old_page->tab_label->allocation.width + 2;
	  area.height = old_page->tab_label->allocation.height + 2;

	  gtk_notebook_draw_tab (notebook, old_page, &area);
	}
    }
}

static gint
gtk_notebook_timer (GtkNotebook *notebook)
{
  gboolean retval = FALSE;

  GDK_THREADS_ENTER ();
  
  if (notebook->timer)
    {
      if (notebook->click_child == GTK_ARROW_LEFT)
	{
	  if (!notebook->focus_tab ||
	      gtk_notebook_search_page (notebook, notebook->focus_tab,
					STEP_PREV, TRUE))
	    gtk_container_focus (GTK_CONTAINER (notebook), GTK_DIR_LEFT);
	}
      else if (notebook->click_child == GTK_ARROW_RIGHT)
	{
	  if (!notebook->focus_tab ||
	      gtk_notebook_search_page (notebook, notebook->focus_tab,
					STEP_NEXT, TRUE))
	    gtk_container_focus (GTK_CONTAINER (notebook), GTK_DIR_RIGHT);
	}
      if (notebook->need_timer) 
	{
	  notebook->need_timer = FALSE;
	  notebook->timer = gtk_timeout_add (NOTEBOOK_SCROLL_DELAY,
					     (GtkFunction) gtk_notebook_timer, 
					     (gpointer) notebook);
	}
      else
	retval = TRUE;
    }

  GDK_THREADS_LEAVE ();

  return retval;
}

static gint
gtk_notebook_page_compare (gconstpointer a,
			   gconstpointer b)
{
  return (((GtkNotebookPage *) a)->child != b);
}

static void
gtk_notebook_real_remove (GtkNotebook *notebook,
			  GList       *list)
{
  GtkNotebookPage *page;
  GList * next_list;
  gint need_resize = FALSE;

  next_list = gtk_notebook_search_page (notebook, list, STEP_PREV, TRUE);
  if (!next_list)
    next_list = gtk_notebook_search_page (notebook, list, STEP_NEXT, TRUE);

  if (notebook->cur_page == list->data)
    { 
      notebook->cur_page = NULL;
      if (next_list)
	gtk_notebook_switch_page (notebook, GTK_NOTEBOOK_PAGE (next_list), -1);
    }

  if (list == notebook->first_tab)
    notebook->first_tab = next_list;
  if (list == notebook->focus_tab)
    gtk_notebook_switch_focus_tab (notebook, next_list);

  page = list->data;

  if (GTK_WIDGET_VISIBLE (page->child) && GTK_WIDGET_VISIBLE (notebook))
    need_resize = TRUE;

  gtk_widget_unparent (page->child);

  if (page->tab_label)
    gtk_widget_unparent (page->tab_label);

  if (notebook->menu)
    {
      gtk_container_remove (GTK_CONTAINER (notebook->menu), 
			    page->menu_label->parent);
      gtk_widget_queue_resize (notebook->menu);
    }
  if (!page->default_menu)
    gtk_widget_unref (page->menu_label);
  
  notebook->children = g_list_remove_link (notebook->children, list);
  g_list_free (list);
  g_free (page);

  gtk_notebook_update_labels (notebook);
  if (need_resize)
    gtk_widget_queue_resize (GTK_WIDGET (notebook));
}

static void
gtk_notebook_update_labels (GtkNotebook *notebook)
{
  GtkNotebookPage *page;
  GList *list;
  gchar string[32];
  gint page_num = 1;

  for (list = gtk_notebook_search_page (notebook, NULL, STEP_NEXT, FALSE);
       list;
       list = gtk_notebook_search_page (notebook, list, STEP_NEXT, FALSE))
    {
      page = list->data;
      g_snprintf (string, sizeof(string), _("Page %u"), page_num++);
      if (notebook->show_tabs)
	{
	  if (page->default_tab)
	    {
	      if (!page->tab_label)
		{
		  page->tab_label = gtk_label_new (string);
		  gtk_widget_set_parent (page->tab_label,
					 GTK_WIDGET (notebook));
		}
	      else
		gtk_label_set_text (GTK_LABEL (page->tab_label), string);
	    }

	  if (GTK_WIDGET_VISIBLE (page->child) &&
	      !GTK_WIDGET_VISIBLE (page->tab_label))
	    gtk_widget_show (page->tab_label);
	  else if (!GTK_WIDGET_VISIBLE (page->child) &&
		   GTK_WIDGET_VISIBLE (page->tab_label))
	    gtk_widget_hide (page->tab_label);
	}
      if (notebook->menu && page->default_menu)
	{
	  if (page->tab_label && GTK_IS_LABEL (page->tab_label))
	    gtk_label_set_text (GTK_LABEL (page->menu_label),
			   GTK_LABEL (page->tab_label)->label);
	  else
	    gtk_label_set_text (GTK_LABEL (page->menu_label), string);
	}
    }  
}

static gint
gtk_notebook_real_page_position (GtkNotebook *notebook,
				 GList       *list)
{
  GList *work;
  gint count_start;

  g_return_val_if_fail (notebook != NULL, -1);
  g_return_val_if_fail (GTK_IS_NOTEBOOK (notebook), -1);
  g_return_val_if_fail (list != NULL, -1);

  for (work = notebook->children, count_start = 0;
       work && work != list; work = work->next)
    if (GTK_NOTEBOOK_PAGE (work)->pack == GTK_PACK_START)
      count_start++;

  if (!work)
    return -1;

  if (GTK_NOTEBOOK_PAGE (list)->pack == GTK_PACK_START)
    return count_start;

  return (count_start + g_list_length (list) - 1);
}

static GList *
gtk_notebook_search_page (GtkNotebook *notebook,
			  GList       *list,
			  gint         direction,
			  gboolean     find_visible)
{
  GtkNotebookPage *page = NULL;
  GList *old_list = NULL;
  gint flag = 0;

  g_return_val_if_fail (notebook != NULL, NULL);
  g_return_val_if_fail (GTK_IS_NOTEBOOK (notebook), NULL);

  switch (direction)
    {
    case STEP_PREV:
      flag = GTK_PACK_END;
      break;

    case STEP_NEXT:
      flag = GTK_PACK_START;
      break;
    }

  if (list)
    page = list->data;

  if (!page || page->pack == flag)
    {
      if (list)
	{
	  old_list = list;
	  list = list->next;
	}
      else
	list = notebook->children;

      while (list)
	{
	  page = list->data;
	  if (page->pack == flag &&
	      (!find_visible || GTK_WIDGET_VISIBLE (page->child)))
	    return list;
	  old_list = list;
	  list = list->next;
	}
      list = old_list;
    }
  else
    {
      old_list = list;
      list = list->prev;
    }
  while (list)
    {
      page = list->data;
      if (page->pack != flag &&
	  (!find_visible || GTK_WIDGET_VISIBLE (page->child)))
	return list;
      old_list = list;
      list = list->prev;
    }
  return NULL;
}

/* Private GtkNotebook Drawing Functions:
 *
 * gtk_notebook_paint
 * gtk_notebook_draw_tab
 * gtk_notebook_draw_arrow
 * gtk_notebook_set_shape
 */
static void
gtk_notebook_paint (GtkWidget    *widget,
		    GdkRectangle *area)
{
  GtkNotebook *notebook;
  GtkNotebookPage *page;
  GList *children;
  gboolean showarrow;
  gint width, height;
  gint x, y;
  gint gap_x = 0, gap_width = 0;
   
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_NOTEBOOK (widget));
  g_return_if_fail (area != NULL);

  if (!GTK_WIDGET_DRAWABLE (widget))
    return;

  notebook = GTK_NOTEBOOK (widget);

  if ((!notebook->show_tabs && !notebook->show_border) ||
      !notebook->cur_page || !GTK_WIDGET_VISIBLE (notebook->cur_page->child))
    {
      gdk_window_clear_area (widget->window,
			     area->x, area->y,
			     area->width, area->height);
      return;
    }

  x = GTK_CONTAINER (widget)->border_width;
  y = GTK_CONTAINER (widget)->border_width;
  width = widget->allocation.width - x * 2;
  height = widget->allocation.height - y * 2;

  if (notebook->show_border && (!notebook->show_tabs || !notebook->children))
    {
      gtk_paint_box (widget->style, widget->window,
		     GTK_STATE_NORMAL, GTK_SHADOW_OUT,
		     area, widget, "notebook",
		     x, y, width, height);
      return;
    }


  if (!GTK_WIDGET_MAPPED (notebook->cur_page->tab_label))
    {
      page = notebook->first_tab->data;

      switch (notebook->tab_pos)
	{
	case GTK_POS_TOP:
	  y += page->allocation.height + widget->style->klass->ythickness;
	case GTK_POS_BOTTOM:
	  height -= page->allocation.height + widget->style->klass->ythickness;
	  break;
	case GTK_POS_LEFT:
	  x += page->allocation.width + widget->style->klass->xthickness;
	case GTK_POS_RIGHT:
	  width -= page->allocation.width + widget->style->klass->xthickness;
	  break;
	}
      gtk_paint_box (widget->style, widget->window,
		     GTK_STATE_NORMAL, GTK_SHADOW_OUT,
		     area, widget, "notebook",
		     x, y, width, height);
    }
  else
    {
      switch (notebook->tab_pos)
	{
	case GTK_POS_TOP:
	  y += notebook->cur_page->allocation.height;
	case GTK_POS_BOTTOM:
	  height -= notebook->cur_page->allocation.height;
	  break;
	case GTK_POS_LEFT:
	  x += notebook->cur_page->allocation.width;
	case GTK_POS_RIGHT:
	  width -= notebook->cur_page->allocation.width;
	  break;
	}

      switch (notebook->tab_pos)
	{
	case GTK_POS_TOP:
	  gap_x = (notebook->cur_page->allocation.x -
		   GTK_CONTAINER(notebook)->border_width);
	  gap_width = notebook->cur_page->allocation.width;
	  break;
	case GTK_POS_BOTTOM:
	  gap_x = (notebook->cur_page->allocation.x -
		   GTK_CONTAINER(notebook)->border_width);
	  gap_width = notebook->cur_page->allocation.width;
	  break;
	case GTK_POS_LEFT:
	  gap_x = (notebook->cur_page->allocation.y -
		   GTK_CONTAINER(notebook)->border_width);
	  gap_width = notebook->cur_page->allocation.height;
	  break;
	case GTK_POS_RIGHT:
	  gap_x = (notebook->cur_page->allocation.y -
		   GTK_CONTAINER(notebook)->border_width);
	  gap_width = notebook->cur_page->allocation.height;
	  break;
	}
      gtk_paint_box_gap(widget->style, widget->window,
			GTK_STATE_NORMAL, GTK_SHADOW_OUT,
			area, widget, "notebook",
			x, y, width, height,
			notebook->tab_pos, gap_x, gap_width);
    }

  showarrow = FALSE;
  children = gtk_notebook_search_page (notebook, NULL, STEP_PREV, TRUE);
  while (childr