gtkctree.c

gtk是linux一款强大的夸平台的图形化开发工具

      if (!clist->column[i].visible)
	continue;

      get_cell_style (clist, clist_row, state, i, &style, &fg_gc, &bg_gc);

      /* calculate clipping region */
      clip_rectangle.x = clist->column[i].area.x + clist->hoffset;
      clip_rectangle.width = clist->column[i].area.width;

      cell_rectangle.x = clip_rectangle.x - COLUMN_INSET - CELL_SPACING;
      cell_rectangle.width = (clip_rectangle.width + 2 * COLUMN_INSET +
			      (1 + (i == last_column)) * CELL_SPACING);
      cell_rectangle.y = clip_rectangle.y;
      cell_rectangle.height = clip_rectangle.height;

      string_width = 0;
      pixmap_width = 0;

      if (area && !gdk_rectangle_intersect (area, &cell_rectangle,
					    &intersect_rectangle))
	{
	  if (i != ctree->tree_column)
	    continue;
	}
      else
	{
	  gdk_draw_rectangle (clist->clist_window, bg_gc, TRUE,
			      crect->x, crect->y, crect->width, crect->height);

	  /* calculate real width for column justification */
	  switch (clist_row->cell[i].type)
	    {
	    case GTK_CELL_TEXT:
	      width = gdk_string_width
		(style->font, GTK_CELL_TEXT (clist_row->cell[i])->text);
	      break;
	    case GTK_CELL_PIXMAP:
	      gdk_window_get_size
		(GTK_CELL_PIXMAP (clist_row->cell[i])->pixmap, &pixmap_width,
		 &height);
	      width = pixmap_width;
	      break;
	    case GTK_CELL_PIXTEXT:
	      if (GTK_CELL_PIXTEXT (clist_row->cell[i])->pixmap)
		gdk_window_get_size
		  (GTK_CELL_PIXTEXT (clist_row->cell[i])->pixmap,
		   &pixmap_width, &height);

	      width = pixmap_width;

	      if (GTK_CELL_PIXTEXT (clist_row->cell[i])->text)
		{
		  string_width = gdk_string_width
		    (style->font, GTK_CELL_PIXTEXT (clist_row->cell[i])->text);
		  width += string_width;
		}

	      if (GTK_CELL_PIXTEXT (clist_row->cell[i])->text &&
		  GTK_CELL_PIXTEXT (clist_row->cell[i])->pixmap)
		width +=  GTK_CELL_PIXTEXT (clist_row->cell[i])->spacing;

	      if (i == ctree->tree_column)
		width += (ctree->tree_indent *
			  ((GtkCTreeRow *)clist_row)->level);
	      break;
	    default:
	      continue;
	      break;
	    }

	  switch (clist->column[i].justification)
	    {
	    case GTK_JUSTIFY_LEFT:
	      offset = clip_rectangle.x + clist_row->cell[i].horizontal;
	      break;
	    case GTK_JUSTIFY_RIGHT:
	      offset = (clip_rectangle.x + clist_row->cell[i].horizontal +
			clip_rectangle.width - width);
	      break;
	    case GTK_JUSTIFY_CENTER:
	    case GTK_JUSTIFY_FILL:
	      offset = (clip_rectangle.x + clist_row->cell[i].horizontal +
			(clip_rectangle.width / 2) - (width / 2));
	      break;
	    };

	  if (i != ctree->tree_column)
	    {
	      offset += clist_row->cell[i].horizontal;
	      switch (clist_row->cell[i].type)
		{
		case GTK_CELL_PIXMAP:
		  draw_cell_pixmap
		    (clist->clist_window, &clip_rectangle, fg_gc,
		     GTK_CELL_PIXMAP (clist_row->cell[i])->pixmap,
		     GTK_CELL_PIXMAP (clist_row->cell[i])->mask,
		     offset,
		     clip_rectangle.y + clist_row->cell[i].vertical +
		     (clip_rectangle.height - height) / 2,
		     pixmap_width, height);
		  break;
		case GTK_CELL_PIXTEXT:
		  offset = draw_cell_pixmap
		    (clist->clist_window, &clip_rectangle, fg_gc,
		     GTK_CELL_PIXTEXT (clist_row->cell[i])->pixmap,
		     GTK_CELL_PIXTEXT (clist_row->cell[i])->mask,
		     offset,
		     clip_rectangle.y + clist_row->cell[i].vertical +
		     (clip_rectangle.height - height) / 2,
		     pixmap_width, height);
		  offset += GTK_CELL_PIXTEXT (clist_row->cell[i])->spacing;
		case GTK_CELL_TEXT:
		  if (style != GTK_WIDGET (clist)->style)
		    row_center_offset = (((clist->row_height -
					   style->font->ascent -
					   style->font->descent - 1) / 2) +
					 1.5 + style->font->ascent);
		  else
		    row_center_offset = clist->row_center_offset;

		  gdk_gc_set_clip_rectangle (fg_gc, &clip_rectangle);
		  gdk_draw_string
		    (clist->clist_window, style->font, fg_gc,
		     offset,
		     row_rectangle.y + row_center_offset +
		     clist_row->cell[i].vertical,
		     (clist_row->cell[i].type == GTK_CELL_PIXTEXT) ?
		     GTK_CELL_PIXTEXT (clist_row->cell[i])->text :
		     GTK_CELL_TEXT (clist_row->cell[i])->text);
		  gdk_gc_set_clip_rectangle (fg_gc, NULL);
		  break;
		default:
		  break;
		}
	      continue;
	    }
	}

      if (bg_gc == clist->bg_gc)
	gdk_gc_set_background (ctree->lines_gc, &clist_row->background);

      /* draw ctree->tree_column */
      cell_rectangle.y -= CELL_SPACING;
      cell_rectangle.height += CELL_SPACING;

      if (area && !gdk_rectangle_intersect (area, &cell_rectangle,
					    &intersect_rectangle))
	continue;

      /* draw lines */
      offset = gtk_ctree_draw_lines (ctree, (GtkCTreeRow *)clist_row, row, i,
				     state, &clip_rectangle, &cell_rectangle,
				     crect, area, style);

      /* draw expander */
      offset = gtk_ctree_draw_expander (ctree, (GtkCTreeRow *)clist_row,
					style, &clip_rectangle, offset);

      if (clist->column[i].justification == GTK_JUSTIFY_RIGHT)
	offset -= ctree->tree_spacing;
      else
	offset += ctree->tree_spacing;

      if (clist->column[i].justification == GTK_JUSTIFY_RIGHT)
	offset -= (pixmap_width + clist_row->cell[i].horizontal);
      else
	offset += clist_row->cell[i].horizontal;

      old_offset = offset;
      offset = draw_cell_pixmap (clist->clist_window, &clip_rectangle, fg_gc,
				 GTK_CELL_PIXTEXT (clist_row->cell[i])->pixmap,
				 GTK_CELL_PIXTEXT (clist_row->cell[i])->mask,
				 offset, 
				 clip_rectangle.y + clist_row->cell[i].vertical
				 + (clip_rectangle.height - height) / 2,
				 pixmap_width, height);

      if (string_width)
	{ 
	  if (clist->column[i].justification == GTK_JUSTIFY_RIGHT)
	    {
	      offset = (old_offset - string_width);
	      if (GTK_CELL_PIXTEXT (clist_row->cell[i])->pixmap)
		offset -= GTK_CELL_PIXTEXT (clist_row->cell[i])->spacing;
	    }
	  else
	    {
	      if (GTK_CELL_PIXTEXT (clist_row->cell[i])->pixmap)
		offset += GTK_CELL_PIXTEXT (clist_row->cell[i])->spacing;
	    }

	  if (style != GTK_WIDGET (clist)->style)
	    row_center_offset = (((clist->row_height - style->font->ascent -
				   style->font->descent - 1) / 2) +
				 1.5 + style->font->ascent);
	  else
	    row_center_offset = clist->row_center_offset;
	  
	  gdk_gc_set_clip_rectangle (fg_gc, &clip_rectangle);
	  gdk_draw_string (clist->clist_window, style->font, fg_gc, offset,
			   row_rectangle.y + row_center_offset +
			   clist_row->cell[i].vertical,
			   GTK_CELL_PIXTEXT (clist_row->cell[i])->text);
	}
      gdk_gc_set_clip_rectangle (fg_gc, NULL);
    }

  /* draw focus rectangle */
  if (clist->focus_row == row &&
      GTK_WIDGET_CAN_FOCUS (widget) && GTK_WIDGET_HAS_FOCUS (widget))
    {
      if (!area)
	gdk_draw_rectangle (clist->clist_window, clist->xor_gc, FALSE,
			    row_rectangle.x, row_rectangle.y,
			    row_rectangle.width - 1, row_rectangle.height - 1);
      else if (gdk_rectangle_intersect (area, &row_rectangle,
					&intersect_rectangle))
	{
	  gdk_gc_set_clip_rectangle (clist->xor_gc, &intersect_rectangle);
	  gdk_draw_rectangle (clist->clist_window, clist->xor_gc, FALSE,
			      row_rectangle.x, row_rectangle.y,
			      row_rectangle.width - 1,
			      row_rectangle.height - 1);
	  gdk_gc_set_clip_rectangle (clist->xor_gc, NULL);
	}
    }
}

static void
tree_draw_node (GtkCTree     *ctree, 
	        GtkCTreeNode *node)
{
  GtkCList *clist;
  
  clist = GTK_CLIST (ctree);

  if (CLIST_UNFROZEN (clist) && gtk_ctree_is_viewable (ctree, node))
    {
      GtkCTreeNode *work;
      gint num = 0;
      
      work = GTK_CTREE_NODE (clist->row_list);
      while (work && work != node)
	{
	  work = GTK_CTREE_NODE_NEXT (work);
	  num++;
	}
      if (work && gtk_clist_row_is_visible (clist, num) != GTK_VISIBILITY_NONE)
	GTK_CLIST_CLASS_FW (clist)->draw_row
	  (clist, NULL, num, GTK_CLIST_ROW ((GList *) node));
    }
}

static GtkCTreeNode *
gtk_ctree_last_visible (GtkCTree     *ctree,
			GtkCTreeNode *node)
{
  GtkCTreeNode *work;
  
  if (!node)
    return NULL;

  work = GTK_CTREE_ROW (node)->children;

  if (!work || !GTK_CTREE_ROW (node)->expanded)
    return node;

  while (GTK_CTREE_ROW (work)->sibling)
    work = GTK_CTREE_ROW (work)->sibling;

  return gtk_ctree_last_visible (ctree, work);
}

static void
gtk_ctree_link (GtkCTree     *ctree,
		GtkCTreeNode *node,
		GtkCTreeNode *parent,
		GtkCTreeNode *sibling,
		gboolean      update_focus_row)
{
  GtkCList *clist;
  GList *list_end;
  GList *list;
  GList *work;
  gboolean visible = FALSE;
  gint rows = 0;
  
  if (sibling)
    g_return_if_fail (GTK_CTREE_ROW (sibling)->parent == parent);
  g_return_if_fail (node != NULL);
  g_return_if_fail (node != sibling);
  g_return_if_fail (node != parent);

  clist = GTK_CLIST (ctree);

  if (update_focus_row && clist->selection_mode == GTK_SELECTION_EXTENDED)
    {
      if (clist->anchor != -1)
	GTK_CLIST_CLASS_FW (clist)->resync_selection (clist, NULL);
      
      g_list_free (clist->undo_selection);
      g_list_free (clist->undo_unselection);
      clist->undo_selection = NULL;
      clist->undo_unselection = NULL;
    }

  for (rows = 1, list_end = (GList *)node; list_end->next;
       list_end = list_end->next)
    rows++;

  GTK_CTREE_ROW (node)->parent = parent;
  GTK_CTREE_ROW (node)->sibling = sibling;

  if (!parent || (parent && (gtk_ctree_is_viewable (ctree, parent) &&
			     GTK_CTREE_ROW (parent)->expanded)))
    {
      visible = TRUE;
      clist->rows += rows;
    }

  if (parent)
    work = (GList *)(GTK_CTREE_ROW (parent)->children);
  else
    work = clist->row_list;

  if (sibling)
    {
      if (work != (GList *)sibling)
	{
	  while (GTK_CTREE_ROW (work)->sibling != sibling)
	    work = (GList *)(GTK_CTREE_ROW (work)->sibling);
	  GTK_CTREE_ROW (work)->sibling = node;
	}

      if (sibling == GTK_CTREE_NODE (clist->row_list))
	clist->row_list = (GList *) node;
      if (GTK_CTREE_NODE_PREV (sibling) &&
	  GTK_CTREE_NODE_NEXT (GTK_CTREE_NODE_PREV (sibling)) == sibling)
	{
	  list = (GList *)GTK_CTREE_NODE_PREV (sibling);
	  list->next = (GList *)node;
	}
      
      list = (GList *)node;
      list->prev = (GList *)GTK_CTREE_NODE_PREV (sibling);
      list_end->next = (GList *)sibling;
      list = (GList *)sibling;
      list->prev = list_end;
      if (parent && GTK_CTREE_ROW (parent)->children == sibling)
	GTK_CTREE_ROW (parent)->children = node;
    }
  else
    {
      if (work)
	{
	  /* find sibling */
	  while (GTK_CTREE_ROW (work)->sibling)
	    work = (GList *)(GTK_CTREE_ROW (work)->sibling);
	  GTK_CTREE_ROW (work)->sibling = node;
	  
	  /* find last visible child of sibling */
	  work = (GList *) gtk_ctree_last_visible (ctree,
						   GTK_CTREE_NODE (work));
	  
	  list_end->next = work->next;
	  if (work->next)
	    list = work->next->prev = list_end;
	  work->next = (GList *)node;
	  list = (GList *)node;
	  list->prev = work;
	}
      else
	{
	  if (parent)
	    {
	      GTK_CTREE_ROW (parent)->children = node;
	      list = (GList *)node;
	      list->prev = (GList *)parent;
	      if (GTK_CTREE_ROW (parent)->expanded)
		{
		  list_end->next = (GList *)GTK_CTREE_NODE_NEXT (parent);
		  if (GTK_CTREE_NODE_NEXT(parent))
		    {
		      list = (GList *)GTK_CTREE_NODE_NEXT (parent);
		      list->prev = list_end;
		    }
		  list = (GList *)parent;
		  list->next = (GList *)node;
		}
	      else
		list_end->next = NULL;
	    }
	  else
	    {
	      clist->row_list = (GList *)node;
	      list = (GList *)node;
	      list->prev = NULL;
	      list_end->next = NULL;
	    }
	}
    }

  gtk_ctree_pre_recursive (ctree, node, tree_update_level, NULL); 

  if (clist->row_list_end == NULL ||
      clist->row_list_end->next == (GList *)node)
    clist->row_list_end = list_end;

  if (visible && update_focus_row)
    {
      gint pos;
	  
      pos = g_list_position (clist->row_list, (GList *)node);
  
      if (pos <= clist->focus_row)
	{
	  clist->focus_row += rows;
	  clist->undo_anchor = clist->focus_row;
	}
    }
}

static void
gtk_ctree_unlink (GtkCTree     *ctree, 
		  GtkCTreeNode *node,
                  gboolean      update_focus_row)
{
  GtkCList *clist;
  gint rows;
  gint level;
  gint visible;
  GtkCTreeNode *work;
  GtkCTreeNode *parent;
  GList *list;

  g_return_if_fail (ctree != NULL);
  g_return_i