gtktree.c

gtk是linux一款强大的夸平台的图形化开发工具

      tmp_list = selected_widgets;
      while (tmp_list)
	{
	  widget = tmp_list->data;
	  tmp_list = tmp_list->next;
	  
#ifdef TREE_DEBUG
	  g_message("* widget [%#x] subtree [%#x]\n", 
		    (int)widget, (int)GTK_TREE_ITEM_SUBTREE(widget));
#endif /* TREE_DEBUG */
	  
	  /* remove widget of selection */
	  root_tree->selection = g_list_remove (root_tree->selection, widget);
	  
	  /* unref it to authorize is destruction */
	  gtk_widget_unref (widget);
	}
      
      /* emit only one selection_changed signal */
      gtk_signal_emit (GTK_OBJECT (root_tree), 
		       tree_signals[SELECTION_CHANGED]);
    }
  
#ifdef TREE_DEBUG
  g_message("* free selected_widgets list\n");
#endif /* TREE_DEBUG */
  g_list_free (selected_widgets);
  g_list_free (sorted_list);
  
  if (root_tree->children && !root_tree->selection &&
      (root_tree->selection_mode == GTK_SELECTION_BROWSE))
    {
#ifdef TREE_DEBUG
      g_message("* BROWSE mode, select another item\n");
#endif /* TREE_DEBUG */
      widget = root_tree->children->data;
      gtk_tree_select_child (root_tree, widget);
    }
  
  if (GTK_WIDGET_VISIBLE (root_tree))
    {
#ifdef TREE_DEBUG
      g_message("* query queue resizing for root_tree\n");
#endif /* TREE_DEBUG */      
      gtk_widget_queue_resize (GTK_WIDGET (root_tree));
    }
}

void
gtk_tree_select_child (GtkTree   *tree,
		       GtkWidget *tree_item)
{
  g_return_if_fail (tree != NULL);
  g_return_if_fail (GTK_IS_TREE (tree));
  g_return_if_fail (tree_item != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
  
  gtk_signal_emit (GTK_OBJECT (tree), tree_signals[SELECT_CHILD], tree_item);
}

void
gtk_tree_select_item (GtkTree   *tree,
		      gint       item)
{
  GList *tmp_list;
  
  g_return_if_fail (tree != NULL);
  g_return_if_fail (GTK_IS_TREE (tree));
  
  tmp_list = g_list_nth (tree->children, item);
  if (tmp_list)
    gtk_tree_select_child (tree, GTK_WIDGET (tmp_list->data));
  
}

static void
gtk_tree_size_allocate (GtkWidget     *widget,
			GtkAllocation *allocation)
{
  GtkTree *tree;
  GtkWidget *child, *subtree;
  GtkAllocation child_allocation;
  GList *children;
  
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE (widget));
  g_return_if_fail (allocation != NULL);
  
  tree = GTK_TREE (widget);
  
  widget->allocation = *allocation;
  if (GTK_WIDGET_REALIZED (widget))
    gdk_window_move_resize (widget->window,
			    allocation->x, allocation->y,
			    allocation->width, allocation->height);
  
  if (tree->children)
    {
      child_allocation.x = GTK_CONTAINER (tree)->border_width;
      child_allocation.y = GTK_CONTAINER (tree)->border_width;
      child_allocation.width = MAX (1, (gint)allocation->width - child_allocation.x * 2);
      
      children = tree->children;
      
      while (children)
	{
	  child = children->data;
	  children = children->next;
	  
	  if (GTK_WIDGET_VISIBLE (child))
	    {
	      GtkRequisition child_requisition;
	      gtk_widget_get_child_requisition (child, &child_requisition);
	      
	      child_allocation.height = child_requisition.height;
	      
	      gtk_widget_size_allocate (child, &child_allocation);
	      
	      child_allocation.y += child_allocation.height;
	      
	      if((subtree = GTK_TREE_ITEM(child)->subtree))
		if(GTK_WIDGET_VISIBLE (subtree))
		  {
		    child_allocation.height = subtree->requisition.height;
		    gtk_widget_size_allocate (subtree, &child_allocation);
		    child_allocation.y += child_allocation.height;
		  }
	    }
	}
    }
  
}

static void
gtk_tree_size_request (GtkWidget      *widget,
		       GtkRequisition *requisition)
{
  GtkTree *tree;
  GtkWidget *child, *subtree;
  GList *children;
  GtkRequisition child_requisition;
  
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE (widget));
  g_return_if_fail (requisition != NULL);
  
  tree = GTK_TREE (widget);
  requisition->width = 0;
  requisition->height = 0;
  
  children = tree->children;
  while (children)
    {
      child = children->data;
      children = children->next;
      
      if (GTK_WIDGET_VISIBLE (child))
	{
	  gtk_widget_size_request (child, &child_requisition);
	  
	  requisition->width = MAX (requisition->width, child_requisition.width);
	  requisition->height += child_requisition.height;
	  
	  if((subtree = GTK_TREE_ITEM(child)->subtree) &&
	     GTK_WIDGET_VISIBLE (subtree))
	    {
	      gtk_widget_size_request (subtree, &child_requisition);
	      
	      requisition->width = MAX (requisition->width, 
					child_requisition.width);
	      
	      requisition->height += child_requisition.height;
	    }
	}
    }
  
  requisition->width += GTK_CONTAINER (tree)->border_width * 2;
  requisition->height += GTK_CONTAINER (tree)->border_width * 2;
  
  requisition->width = MAX (requisition->width, 1);
  requisition->height = MAX (requisition->height, 1);
  
}

static void
gtk_tree_unmap (GtkWidget *widget)
{
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE (widget));
  
  GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
  gdk_window_hide (widget->window);
  
}

void
gtk_tree_unselect_child (GtkTree   *tree,
			 GtkWidget *tree_item)
{
  g_return_if_fail (tree != NULL);
  g_return_if_fail (GTK_IS_TREE (tree));
  g_return_if_fail (tree_item != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));
  
  gtk_signal_emit (GTK_OBJECT (tree), tree_signals[UNSELECT_CHILD], tree_item);
}

void
gtk_tree_unselect_item (GtkTree *tree,
			gint     item)
{
  GList *tmp_list;
  
  g_return_if_fail (tree != NULL);
  g_return_if_fail (GTK_IS_TREE (tree));
  
  tmp_list = g_list_nth (tree->children, item);
  if (tmp_list)
    gtk_tree_unselect_child (tree, GTK_WIDGET (tmp_list->data));
  
}

static void
gtk_real_tree_select_child (GtkTree   *tree,
			    GtkWidget *child)
{
  GList *selection, *root_selection;
  GList *tmp_list;
  GtkWidget *tmp_item;
  
  g_return_if_fail (tree != NULL);
  g_return_if_fail (GTK_IS_TREE (tree));
  g_return_if_fail (child != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (child));
  
  root_selection = tree->root_tree->selection;
  
  switch (tree->root_tree->selection_mode)
    {
    case GTK_SELECTION_SINGLE:
      
      selection = root_selection;
      
      /* remove old selection list */
      while (selection)
	{
	  tmp_item = selection->data;
	  
	  if (tmp_item != child)
	    {
	      gtk_tree_item_deselect (GTK_TREE_ITEM (tmp_item));
	      
	      tmp_list = selection;
	      selection = selection->next;
	      
	      root_selection = g_list_remove_link (root_selection, tmp_list);
	      gtk_widget_unref (tmp_item);
	      
	      g_list_free (tmp_list);
	    }
	  else
	    selection = selection->next;
	}
      
      if (child->state == GTK_STATE_NORMAL)
	{
	  gtk_tree_item_select (GTK_TREE_ITEM (child));
	  root_selection = g_list_prepend (root_selection, child);
	  gtk_widget_ref (child);
	}
      else if (child->state == GTK_STATE_SELECTED)
	{
	  gtk_tree_item_deselect (GTK_TREE_ITEM (child));
	  root_selection = g_list_remove (root_selection, child);
	  gtk_widget_unref (child);
	}
      
      tree->root_tree->selection = root_selection;
      
      gtk_signal_emit (GTK_OBJECT (tree->root_tree), 
		       tree_signals[SELECTION_CHANGED]);
      break;
      
      
    case GTK_SELECTION_BROWSE:
      selection = root_selection;
      
      while (selection)
	{
	  tmp_item = selection->data;
	  
	  if (tmp_item != child)
	    {
	      gtk_tree_item_deselect (GTK_TREE_ITEM (tmp_item));
	      
	      tmp_list = selection;
	      selection = selection->next;
	      
	      root_selection = g_list_remove_link (root_selection, tmp_list);
	      gtk_widget_unref (tmp_item);
	      
	      g_list_free (tmp_list);
	    }
	  else
	    selection = selection->next;
	}
      
      tree->root_tree->selection = root_selection;
      
      if (child->state == GTK_STATE_NORMAL)
	{
	  gtk_tree_item_select (GTK_TREE_ITEM (child));
	  root_selection = g_list_prepend (root_selection, child);
	  gtk_widget_ref (child);
	  tree->root_tree->selection = root_selection;
	  gtk_signal_emit (GTK_OBJECT (tree->root_tree), 
			   tree_signals[SELECTION_CHANGED]);
	}
      break;
      
    case GTK_SELECTION_MULTIPLE:
      if (child->state == GTK_STATE_NORMAL)
	{
	  gtk_tree_item_select (GTK_TREE_ITEM (child));
	  root_selection = g_list_prepend (root_selection, child);
	  gtk_widget_ref (child);
	  tree->root_tree->selection = root_selection;
	  gtk_signal_emit (GTK_OBJECT (tree->root_tree), 
			   tree_signals[SELECTION_CHANGED]);
	}
      else if (child->state == GTK_STATE_SELECTED)
	{
	  gtk_tree_item_deselect (GTK_TREE_ITEM (child));
	  root_selection = g_list_remove (root_selection, child);
	  gtk_widget_unref (child);
	  tree->root_tree->selection = root_selection;
	  gtk_signal_emit (GTK_OBJECT (tree->root_tree), 
			   tree_signals[SELECTION_CHANGED]);
	}
      break;
      
    case GTK_SELECTION_EXTENDED:
      break;
    }
}

static void
gtk_real_tree_unselect_child (GtkTree   *tree,
			      GtkWidget *child)
{
  g_return_if_fail (tree != NULL);
  g_return_if_fail (GTK_IS_TREE (tree));
  g_return_if_fail (child != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (child));
  
  switch (tree->selection_mode)
    {
    case GTK_SELECTION_SINGLE:
    case GTK_SELECTION_MULTIPLE:
    case GTK_SELECTION_BROWSE:
      if (child->state == GTK_STATE_SELECTED)
	{
	  GtkTree* root_tree = GTK_TREE_ROOT_TREE(tree);
	  gtk_tree_item_deselect (GTK_TREE_ITEM (child));
	  root_tree->selection = g_list_remove (root_tree->selection, child);
	  gtk_widget_unref (child);
	  gtk_signal_emit (GTK_OBJECT (tree->root_tree), 
			   tree_signals[SELECTION_CHANGED]);
	}
      break;
      
    case GTK_SELECTION_EXTENDED:
      break;
    }
}

void
gtk_tree_set_selection_mode (GtkTree       *tree,
			     GtkSelectionMode mode) 
{
  g_return_if_fail (tree != NULL);
  g_return_if_fail (GTK_IS_TREE (tree));
  
  tree->selection_mode = mode;
}

void
gtk_tree_set_view_mode (GtkTree       *tree,
			GtkTreeViewMode mode) 
{
  g_return_if_fail (tree != NULL);
  g_return_if_fail (GTK_IS_TREE (tree));
  
  tree->view_mode = mode;
}

void
gtk_tree_set_view_lines (GtkTree       *tree,
			 guint          flag) 
{
  g_return_if_fail (tree != NULL);
  g_return_if_fail (GTK_IS_TREE (tree));
  
  tree->view_line = flag;
}