gtkctree.c

gtk是linux一款强大的夸平台的图形化开发工具

		    gdk_draw_rectangle (clist->clist_window, bg_gc, TRUE,
					tree_rectangle.x,
					tree_rectangle.y,
					tree_rectangle.width,
					tree_rectangle.height);
		  else 
		    gdk_draw_rectangle (clist->clist_window, bg_gc, TRUE,
					tc_rectangle.x,
					tc_rectangle.y,
					tc_rectangle.width,
					tc_rectangle.height);
		}
	      if (next_level > GTK_CTREE_ROW (node)->level)
		gdk_draw_line (clist->clist_window, ctree->lines_gc,
			       xcenter, crect->y,
			       xcenter, crect->y + crect->height);
	      else
		{
		  gint width;

		  offset_x = MIN (ctree->tree_indent, 2 * TAB_SIZE);
		  width = offset_x / 2 + offset_x % 2;

		  parent = GTK_CTREE_ROW (node)->parent;

		  tree_rectangle.y = ycenter;
		  tree_rectangle.height = (cell_rectangle->y - ycenter +
					   cell_rectangle->height);

		  if (justify_right)
		    {
		      tree_rectangle.x = MAX(xcenter + 1 - width, column_left);
		      tree_rectangle.width = MIN (xcenter + 1 - column_left,
						  width);
		    }
		  else
		    {
		      tree_rectangle.x = xcenter;
		      tree_rectangle.width = MIN (column_right - xcenter,
						  width);
		    }

		  if (!area ||
		      gdk_rectangle_intersect (area, &tree_rectangle,
					       &tc_rectangle))
		    {
		      if (parent)
			{
			  get_cell_style (clist, &GTK_CTREE_ROW (parent)->row,
					  state, column, NULL, NULL, &bg_gc);
			  if (bg_gc == clist->bg_gc)
			    gdk_gc_set_foreground
			      (clist->bg_gc,
			       &GTK_CTREE_ROW (parent)->row.background);
			}
		      else if (state == GTK_STATE_SELECTED)
			bg_gc = style->base_gc[state];
		      else
			bg_gc = GTK_WIDGET (clist)->style->base_gc[state];

		      if (!area)
			gdk_draw_rectangle (clist->clist_window, bg_gc, TRUE,
					    tree_rectangle.x,
					    tree_rectangle.y,
					    tree_rectangle.width,
					    tree_rectangle.height);
		      else
			gdk_draw_rectangle (clist->clist_window,
					    bg_gc, TRUE,
					    tc_rectangle.x,
					    tc_rectangle.y,
					    tc_rectangle.width,
					    tc_rectangle.height);
		    }

		  get_cell_style (clist, &GTK_CTREE_ROW (node)->row,
				  state, column, NULL, NULL, &bg_gc);
		  if (bg_gc == clist->bg_gc)
		    gdk_gc_set_foreground
		      (clist->bg_gc, &GTK_CTREE_ROW (node)->row.background);

		  gdk_gc_set_clip_rectangle (bg_gc, crect);
		  gdk_draw_arc (clist->clist_window, bg_gc, TRUE,
				xcenter - (justify_right * offset_x),
				cell_rectangle->y,
				offset_x, clist->row_height,
				(180 + (justify_right * 90)) * 64, 90 * 64);
		  gdk_gc_set_clip_rectangle (bg_gc, NULL);

		  gdk_draw_line (clist->clist_window, ctree->lines_gc, 
				 xcenter, cell_rectangle->y, xcenter, ycenter);

		  if (justify_right)
		    gdk_draw_arc (clist->clist_window, ctree->lines_gc, FALSE,
				  xcenter - offset_x, cell_rectangle->y,
				  offset_x, clist->row_height,
				  270 * 64, 90 * 64);
		  else
		    gdk_draw_arc (clist->clist_window, ctree->lines_gc, FALSE,
				  xcenter, cell_rectangle->y,
				  offset_x, clist->row_height,
				  180 * 64, 90 * 64);
		}
	      node = GTK_CTREE_ROW (node)->parent;
	    }
	}

      if (state != GTK_STATE_SELECTED)
	{
	  tree_rectangle.y = clip_rectangle->y;
	  tree_rectangle.height = clip_rectangle->height;
	  tree_rectangle.width = COLUMN_INSET + CELL_SPACING +
	    MIN (clist->column[ctree->tree_column].area.width + COLUMN_INSET,
		 TAB_SIZE);

	  if (justify_right)
	    tree_rectangle.x = MAX (xcenter + 1, column_left);
	  else
	    tree_rectangle.x = column_left;

	  if (!area)
	    gdk_draw_rectangle (clist->clist_window,
				GTK_WIDGET
				(ctree)->style->base_gc[GTK_STATE_NORMAL],
				TRUE,
				tree_rectangle.x,
				tree_rectangle.y,
				tree_rectangle.width,
				tree_rectangle.height);
	  else if (gdk_rectangle_intersect (area, &tree_rectangle,
					    &tc_rectangle))
	    gdk_draw_rectangle (clist->clist_window,
				GTK_WIDGET
				(ctree)->style->base_gc[GTK_STATE_NORMAL],
				TRUE,
				tc_rectangle.x,
				tc_rectangle.y,
				tc_rectangle.width,
				tc_rectangle.height);
	}

      xcenter = offset + (justification_factor * ctree->tree_indent / 2);

      get_cell_style (clist, &ctree_row->row, state, column, NULL, NULL,
		      &bg_gc);
      if (bg_gc == clist->bg_gc)
	gdk_gc_set_foreground (clist->bg_gc, &ctree_row->row.background);

      gdk_gc_set_clip_rectangle (bg_gc, crect);
      if (ctree_row->is_leaf)
	{
	  GdkPoint points[6];

	  points[0].x = offset + justification_factor * TAB_SIZE;
	  points[0].y = cell_rectangle->y;

	  points[1].x = points[0].x - justification_factor * 4;
	  points[1].y = points[0].y;

	  points[2].x = points[1].x - justification_factor * 2;
	  points[2].y = points[1].y + 3;

	  points[3].x = points[2].x;
	  points[3].y = points[2].y + clist->row_height - 5;

	  points[4].x = points[3].x + justification_factor * 2;
	  points[4].y = points[3].y + 3;

	  points[5].x = points[4].x + justification_factor * 4;
	  points[5].y = points[4].y;

	  gdk_draw_polygon (clist->clist_window, bg_gc, TRUE, points, 6);
	  gdk_draw_lines (clist->clist_window, ctree->lines_gc, points, 6);
	}
      else 
	{
	  gdk_draw_arc (clist->clist_window, bg_gc, TRUE,
			offset - (justify_right * 2 * TAB_SIZE),
			cell_rectangle->y,
			2 * TAB_SIZE, clist->row_height,
			(90 + (180 * justify_right)) * 64, 180 * 64);
	  gdk_draw_arc (clist->clist_window, ctree->lines_gc, FALSE,
			offset - (justify_right * 2 * TAB_SIZE),
			cell_rectangle->y,
			2 * TAB_SIZE, clist->row_height,
			(90 + (180 * justify_right)) * 64, 180 * 64);
	}
      gdk_gc_set_clip_rectangle (bg_gc, NULL);
      gdk_gc_set_clip_rectangle (ctree->lines_gc, NULL);

      offset += justification_factor * 3;
      break;
    default:
      xcenter = offset + justification_factor * PM_SIZE / 2;

      if (area)
	{
	  tree_rectangle.y = crect->y;
	  tree_rectangle.height = crect->height;

	  if (justify_right)
	    {
	      tree_rectangle.x = xcenter - PM_SIZE / 2 - 2;
	      tree_rectangle.width = (clip_rectangle->x +
				      clip_rectangle->width -tree_rectangle.x);
	    }
	  else
	    {
	      tree_rectangle.x = clip_rectangle->x + PM_SIZE / 2;
	      tree_rectangle.width = (xcenter + PM_SIZE / 2 + 2 -
				      clip_rectangle->x);
	    }

	  if (!gdk_rectangle_intersect (area, &tree_rectangle, &tc_rectangle))
	    break;
	}

      offset_x = 1;
      offset_y = 0;
      if (ctree->line_style == GTK_CTREE_LINES_DOTTED)
	{
	  offset_x += abs((clip_rectangle->x + clist->hoffset) % 2);
	  offset_y  = abs((cell_rectangle->y + clist->voffset) % 2);
	}

      clip_rectangle->y--;
      clip_rectangle->height++;
      gdk_gc_set_clip_rectangle (ctree->lines_gc, clip_rectangle);
      gdk_draw_line (clist->clist_window, ctree->lines_gc,
		     xcenter,
		     (ctree->show_stub || clist->row_list->data != ctree_row) ?
		     cell_rectangle->y + offset_y : ycenter,
		     xcenter,
		     (ctree_row->sibling) ? crect->y +crect->height : ycenter);

      gdk_draw_line (clist->clist_window, ctree->lines_gc,
		     xcenter + (justification_factor * offset_x), ycenter,
		     xcenter + (justification_factor * (PM_SIZE / 2 + 2)),
		     ycenter);

      node = ctree_row->parent;
      while (node)
	{
	  xcenter -= (justification_factor * ctree->tree_indent);

	  if (GTK_CTREE_ROW (node)->sibling)
	    gdk_draw_line (clist->clist_window, ctree->lines_gc, 
			   xcenter, cell_rectangle->y + offset_y,
			   xcenter, crect->y + crect->height);
	  node = GTK_CTREE_ROW (node)->parent;
	}
      gdk_gc_set_clip_rectangle (ctree->lines_gc, NULL);
      clip_rectangle->y++;
      clip_rectangle->height--;
      break;
    }
  return offset;
}

static void
draw_row (GtkCList     *clist,
	  GdkRectangle *area,
	  gint          row,
	  GtkCListRow  *clist_row)
{
  GtkWidget *widget;
  GtkCTree  *ctree;
  GdkRectangle *rect;
  GdkRectangle *crect;
  GdkRectangle row_rectangle;
  GdkRectangle cell_rectangle; 
  GdkRectangle clip_rectangle;
  GdkRectangle intersect_rectangle;
  gint last_column;
  gint column_left = 0;
  gint column_right = 0;
  gint offset = 0;
  gint state;
  gint i;

  g_return_if_fail (clist != NULL);

  /* bail now if we arn't drawable yet */
  if (!GTK_WIDGET_DRAWABLE (clist) || row < 0 || row >= clist->rows)
    return;

  widget = GTK_WIDGET (clist);
  ctree  = GTK_CTREE  (clist);

  /* if the function is passed the pointer to the row instead of null,
   * it avoids this expensive lookup */
  if (!clist_row)
    clist_row = (g_list_nth (clist->row_list, row))->data;

  /* rectangle of the entire row */
  row_rectangle.x = 0;
  row_rectangle.y = ROW_TOP_YPIXEL (clist, row);
  row_rectangle.width = clist->clist_window_width;
  row_rectangle.height = clist->row_height;

  /* rectangle of the cell spacing above the row */
  cell_rectangle.x = 0;
  cell_rectangle.y = row_rectangle.y - CELL_SPACING;
  cell_rectangle.width = row_rectangle.width;
  cell_rectangle.height = CELL_SPACING;

  /* rectangle used to clip drawing operations, it's y and height
   * positions only need to be set once, so we set them once here. 
   * the x and width are set withing the drawing loop below once per
   * column */
  clip_rectangle.y = row_rectangle.y;
  clip_rectangle.height = row_rectangle.height;

  if (clist_row->state == GTK_STATE_NORMAL)
    {
      if (clist_row->fg_set)
	gdk_gc_set_foreground (clist->fg_gc, &clist_row->foreground);
      if (clist_row->bg_set)
	gdk_gc_set_foreground (clist->bg_gc, &clist_row->background);
    }
  
  state = clist_row->state;

  gdk_gc_set_foreground (ctree->lines_gc,
			 &widget->style->fg[clist_row->state]);

  /* draw the cell borders */
  if (area)
    {
      rect = &intersect_rectangle;
      crect = &intersect_rectangle;

      if (gdk_rectangle_intersect (area, &cell_rectangle, crect))
	gdk_draw_rectangle (clist->clist_window,
			    widget->style->base_gc[GTK_STATE_ACTIVE], TRUE,
			    crect->x, crect->y, crect->width, crect->height);
    }
  else
    {
      rect = &clip_rectangle;
      crect = &cell_rectangle;

      gdk_draw_rectangle (clist->clist_window,
			  widget->style->base_gc[GTK_STATE_ACTIVE], TRUE,
			  crect->x, crect->y, crect->width, crect->height);
    }

  /* horizontal black lines */
  if (ctree->line_style == GTK_CTREE_LINES_TABBED)
    { 

      column_right = (COLUMN_LEFT_XPIXEL (clist, ctree->tree_column) +
		      clist->column[ctree->tree_column].area.width +
		      COLUMN_INSET);
      column_left = (COLUMN_LEFT_XPIXEL (clist, ctree->tree_column) -
		     COLUMN_INSET - (ctree->tree_column != 0) * CELL_SPACING);

      switch (clist->column[ctree->tree_column].justification)
	{
	case GTK_JUSTIFY_CENTER:
	case GTK_JUSTIFY_FILL:
	case GTK_JUSTIFY_LEFT:
	  offset = (column_left + ctree->tree_indent *
		    (((GtkCTreeRow *)clist_row)->level - 1));

	  gdk_draw_line (clist->clist_window, ctree->lines_gc, 
			 MIN (offset + TAB_SIZE, column_right),
			 cell_rectangle.y,
			 clist->clist_window_width, cell_rectangle.y);
	  break;
	case GTK_JUSTIFY_RIGHT:
	  offset = (column_right - 1 - ctree->tree_indent *
		    (((GtkCTreeRow *)clist_row)->level - 1));

	  gdk_draw_line (clist->clist_window, ctree->lines_gc,
			 -1, cell_rectangle.y,
			 MAX (offset - TAB_SIZE, column_left),
			 cell_rectangle.y);
	  break;
	}
    }

  /* the last row has to clear it's bottom cell spacing too */
  if (clist_row == clist->row_list_end->data)
    {
      cell_rectangle.y += clist->row_height + CELL_SPACING;

      if (!area || gdk_rectangle_intersect (area, &cell_rectangle, crect))
	{
	  gdk_draw_rectangle (clist->clist_window,
			      widget->style->base_gc[GTK_STATE_ACTIVE], TRUE,
			      crect->x, crect->y, crect->width, crect->height);

	  /* horizontal black lines */
	  if (ctree->line_style == GTK_CTREE_LINES_TABBED)
	    { 
	      switch (clist->column[ctree->tree_column].justification)
		{
		case GTK_JUSTIFY_CENTER:
		case GTK_JUSTIFY_FILL:
		case GTK_JUSTIFY_LEFT:
		  gdk_draw_line (clist->clist_window, ctree->lines_gc, 
				 MIN (column_left + TAB_SIZE + COLUMN_INSET +
				      (((GtkCTreeRow *)clist_row)->level > 1) *
				      MIN (ctree->tree_indent / 2, TAB_SIZE),
				      column_right),
				 cell_rectangle.y,
				 clist->clist_window_width, cell_rectangle.y);
		  break;
		case GTK_JUSTIFY_RIGHT:
		  gdk_draw_line (clist->clist_window, ctree->lines_gc, 
				 -1, cell_rectangle.y,
				 MAX (column_right - TAB_SIZE - 1 -
				      COLUMN_INSET -
				      (((GtkCTreeRow *)clist_row)->level > 1) *
				      MIN (ctree->tree_indent / 2, TAB_SIZE),
				      column_left - 1), cell_rectangle.y);
		  break;
		}
	    }
	}
    }	  

  for (last_column = clist->columns - 1;
       last_column >= 0 && !clist->column[last_column].visible; last_column--)
    ;

  /* iterate and draw all the columns (row cells) and draw their contents */
  for (i = 0; i < clist->columns; i++)
    {
      GtkStyle *style;
      GdkGC *fg_gc; 
      GdkGC *bg_gc;

      gint width;
      gint height;
      gint pixmap_width;
      gint string_width;
      gint old_offset;
      gint row_center_offset;