gtktree.c

gtk是linux一款强大的夸平台的图形化开发工具

  g_return_if_fail (GTK_IS_TREE (object));
  
  tree = GTK_TREE (object);
  
  children = tree->children;
  while (children)
    {
      child = children->data;
      children = children->next;
      
      gtk_widget_ref (child);
      gtk_widget_unparent (child);
      gtk_widget_destroy (child);
      gtk_widget_unref (child);
    }
  
  g_list_free (tree->children);
  tree->children = NULL;
  
  if (tree->root_tree == tree)
    {
      GList *node;
      for (node = tree->selection; node; node = node->next)
	gtk_widget_unref ((GtkWidget *)node->data);
      g_list_free (tree->selection);
      tree->selection = NULL;
    }
  
  if (GTK_OBJECT_CLASS (parent_class)->destroy)
    (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}

static void
gtk_tree_draw (GtkWidget    *widget,
	       GdkRectangle *area)
{
  GtkTree *tree;
  GtkWidget *subtree;
  GtkWidget *child;
  GdkRectangle child_area;
  GList *children;
  
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE (widget));
  g_return_if_fail (area != NULL);
  
  if (GTK_WIDGET_DRAWABLE (widget))
    {
      tree = GTK_TREE (widget);
      
      children = tree->children;
      while (children)
	{
	  child = children->data;
	  children = children->next;
	  
	  if (gtk_widget_intersect (child, area, &child_area))
	    gtk_widget_draw (child, &child_area);
	  
	  if((subtree = GTK_TREE_ITEM(child)->subtree) &&
	     GTK_WIDGET_VISIBLE(subtree) &&
	     gtk_widget_intersect (subtree, area, &child_area))
	    gtk_widget_draw (subtree, &child_area);
	}
    }
  
}

static gint
gtk_tree_expose (GtkWidget      *widget,
		 GdkEventExpose *event)
{
  GtkTree *tree;
  GtkWidget *child;
  GdkEventExpose child_event;
  GList *children;
  
  
  g_return_val_if_fail (widget != NULL, FALSE);
  g_return_val_if_fail (GTK_IS_TREE (widget), FALSE);
  g_return_val_if_fail (event != NULL, FALSE);
  
  if (GTK_WIDGET_DRAWABLE (widget))
    {
      tree = GTK_TREE (widget);
      
      child_event = *event;
      
      children = tree->children;
      while (children)
	{
	  child = children->data;
	  children = children->next;
	  
	  if (GTK_WIDGET_NO_WINDOW (child) &&
	      gtk_widget_intersect (child, &event->area, &child_event.area))
	    gtk_widget_event (child, (GdkEvent*) &child_event);
	}
    }
  
  
  return FALSE;
}

static void
gtk_tree_forall (GtkContainer *container,
		 gboolean      include_internals,
		 GtkCallback   callback,
		 gpointer      callback_data)
{
  GtkTree *tree;
  GtkWidget *child;
  GList *children;
  
  
  g_return_if_fail (container != NULL);
  g_return_if_fail (GTK_IS_TREE (container));
  g_return_if_fail (callback != NULL);
  
  tree = GTK_TREE (container);
  children = tree->children;
  
  while (children)
    {
      child = children->data;
      children = children->next;
      
      (* callback) (child, callback_data);
    }
}

static void
gtk_tree_map (GtkWidget *widget)
{
  GtkTree *tree;
  GtkWidget *child;
  GList *children;
  
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE (widget));
  
  GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
  tree = GTK_TREE (widget);
  
  if(GTK_IS_TREE(widget->parent)) 
    {
      /* set root tree for this tree */
      tree->root_tree = GTK_TREE(widget->parent)->root_tree;
      
      tree->level = GTK_TREE(GTK_WIDGET(tree)->parent)->level+1;
      tree->indent_value = GTK_TREE(GTK_WIDGET(tree)->parent)->indent_value;
      tree->current_indent = GTK_TREE(GTK_WIDGET(tree)->parent)->current_indent + 
	tree->indent_value;
      tree->view_mode = GTK_TREE(GTK_WIDGET(tree)->parent)->view_mode;
      tree->view_line = GTK_TREE(GTK_WIDGET(tree)->parent)->view_line;
    } 
  else
    tree->root_tree = tree;
  
  children = tree->children;
  while (children)
    {
      child = children->data;
      children = children->next;
      
      if (GTK_WIDGET_VISIBLE (child) &&
	  !GTK_WIDGET_MAPPED (child))
	gtk_widget_map (child);
      
      if (GTK_TREE_ITEM (child)->subtree)
	{
	  child = GTK_WIDGET (GTK_TREE_ITEM (child)->subtree);
	  
	  if (GTK_WIDGET_VISIBLE (child) && !GTK_WIDGET_MAPPED (child))
	    gtk_widget_map (child);
	}
    }

  gdk_window_show (widget->window);
}

static gint
gtk_tree_motion_notify (GtkWidget      *widget,
			GdkEventMotion *event)
{
  g_return_val_if_fail (widget != NULL, FALSE);
  g_return_val_if_fail (GTK_IS_TREE (widget), FALSE);
  g_return_val_if_fail (event != NULL, FALSE);
  
#ifdef TREE_DEBUG
  g_message("gtk_tree_motion_notify\n");
#endif /* TREE_DEBUG */
  
  return FALSE;
}

static void
gtk_tree_realize (GtkWidget *widget)
{
  GdkWindowAttr attributes;
  gint attributes_mask;
  
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE (widget));
  
  GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
  
  attributes.window_type = GDK_WINDOW_CHILD;
  attributes.x = widget->allocation.x;
  attributes.y = widget->allocation.y;
  attributes.width = widget->allocation.width;
  attributes.height = widget->allocation.height;
  attributes.wclass = GDK_INPUT_OUTPUT;
  attributes.visual = gtk_widget_get_visual (widget);
  attributes.colormap = gtk_widget_get_colormap (widget);
  attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
  
  attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
  
  widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
  gdk_window_set_user_data (widget->window, widget);
  
  widget->style = gtk_style_attach (widget->style, widget->window);
  gdk_window_set_background (widget->window, 
			     &widget->style->base[GTK_STATE_NORMAL]);
}

void
gtk_tree_remove_item (GtkTree      *container,
		      GtkWidget    *widget)
{
  GList *item_list;
  
  g_return_if_fail (container != NULL);
  g_return_if_fail (GTK_IS_TREE (container));
  g_return_if_fail (widget != NULL);
  g_return_if_fail (container == GTK_TREE (widget->parent));
  
  item_list = g_list_append (NULL, widget);
  
  gtk_tree_remove_items (GTK_TREE (container), item_list);
  
  g_list_free (item_list);
}

/* used by gtk_tree_remove_items to make the function independant of
   order in list of items to remove.
   Sort item bu depth in tree */
static gint 
gtk_tree_sort_item_by_depth(GtkWidget* a, GtkWidget* b)
{
  if((GTK_TREE(a->parent)->level) < (GTK_TREE(b->parent)->level))
    return 1;
  if((GTK_TREE(a->parent)->level) > (GTK_TREE(b->parent)->level))
    return -1;
  
  return 0;
}

void
gtk_tree_remove_items (GtkTree *tree,
		       GList   *items)
{
  GtkWidget *widget;
  GList *selected_widgets;
  GList *tmp_list;
  GList *sorted_list;
  GtkTree *real_tree;
  GtkTree *root_tree;
  
  g_return_if_fail (tree != NULL);
  g_return_if_fail (GTK_IS_TREE (tree));
  
#ifdef TREE_DEBUG
  g_message("+ gtk_tree_remove_items [ tree %#x items list %#x ]\n", (int)tree, (int)items);
#endif /* TREE_DEBUG */
  
  /* We may not yet be mapped, so we actively have to find our
   * root tree
   */
  if (tree->root_tree)
    root_tree = tree->root_tree;
  else
    {
      GtkWidget *tmp = GTK_WIDGET (tree);
      while (tmp->parent && GTK_IS_TREE (tmp->parent))
	tmp = tmp->parent;
      
      root_tree = GTK_TREE (tmp);
    }
  
  tmp_list = items;
  selected_widgets = NULL;
  sorted_list = NULL;
  widget = NULL;
  
#ifdef TREE_DEBUG
  g_message("* sort list by depth\n");
#endif /* TREE_DEBUG */
  
  while (tmp_list)
    {
      
#ifdef TREE_DEBUG
      g_message ("* item [%#x] depth [%d]\n", 
		 (int)tmp_list->data,
		 (int)GTK_TREE(GTK_WIDGET(tmp_list->data)->parent)->level);
#endif /* TREE_DEBUG */
      
      sorted_list = g_list_insert_sorted(sorted_list,
					 tmp_list->data,
					 (GCompareFunc)gtk_tree_sort_item_by_depth);
      tmp_list = g_list_next(tmp_list);
    }
  
#ifdef TREE_DEBUG
  /* print sorted list */
  g_message("* sorted list result\n");
  tmp_list = sorted_list;
  while(tmp_list)
    {
      g_message("* item [%#x] depth [%d]\n", 
		(int)tmp_list->data,
		(int)GTK_TREE(GTK_WIDGET(tmp_list->data)->parent)->level);
      tmp_list = g_list_next(tmp_list);
    }
#endif /* TREE_DEBUG */
  
#ifdef TREE_DEBUG
  g_message("* scan sorted list\n");
#endif /* TREE_DEBUG */
  
  tmp_list = sorted_list;
  while (tmp_list)
    {
      widget = tmp_list->data;
      tmp_list = tmp_list->next;
      
#ifdef TREE_DEBUG
      g_message("* item [%#x] subtree [%#x]\n", 
		(int)widget, (int)GTK_TREE_ITEM_SUBTREE(widget));
#endif /* TREE_DEBUG */
      
      /* get real owner of this widget */
      real_tree = GTK_TREE(widget->parent);
#ifdef TREE_DEBUG
      g_message("* subtree having this widget [%#x]\n", (int)real_tree);
#endif /* TREE_DEBUG */
      
      
      if (widget->state == GTK_STATE_SELECTED)
	{
	  selected_widgets = g_list_prepend (selected_widgets, widget);
#ifdef TREE_DEBUG
	  g_message("* selected widget - adding it in selected list [%#x]\n",
		    (int)selected_widgets);
#endif /* TREE_DEBUG */
	}
      
      /* remove this item from its real parent */
#ifdef TREE_DEBUG
      g_message("* remove widget from its owner tree\n");
#endif /* TREE_DEBUG */
      real_tree->children = g_list_remove (real_tree->children, widget);
      
      /* remove subtree associate at this item if it exist */      
      if(GTK_TREE_ITEM(widget)->subtree) 
	{
#ifdef TREE_DEBUG
	  g_message("* remove subtree associate at this item [%#x]\n",
		    (int) GTK_TREE_ITEM(widget)->subtree);
#endif /* TREE_DEBUG */
	  if (GTK_WIDGET_MAPPED (GTK_TREE_ITEM(widget)->subtree))
	    gtk_widget_unmap (GTK_TREE_ITEM(widget)->subtree);
	  
	  gtk_widget_unparent (GTK_TREE_ITEM(widget)->subtree);
	  GTK_TREE_ITEM(widget)->subtree = NULL;
	}
      
      /* really remove widget for this item */
#ifdef TREE_DEBUG
      g_message("* unmap and unparent widget [%#x]\n", (int)widget);
#endif /* TREE_DEBUG */
      if (GTK_WIDGET_MAPPED (widget))
	gtk_widget_unmap (widget);
      
      gtk_widget_unparent (widget);
      
      /* delete subtree if there is no children in it */
      if(real_tree->children == NULL && 
	 real_tree != root_tree)
	{
#ifdef TREE_DEBUG
	  g_message("* owner tree don't have children ... destroy it\n");
#endif /* TREE_DEBUG */
	  gtk_tree_item_remove_subtree(GTK_TREE_ITEM(real_tree->tree_owner));
	}
      
#ifdef TREE_DEBUG
      g_message("* next item in list\n");
#endif /* TREE_DEBUG */
    }
  
  if (selected_widgets)
    {
#ifdef TREE_DEBUG
      g_message("* scan selected item list\n");
#endif /* TREE_DEBUG */