[gtk+/gtk-3-2] Fix gtk_grid_attach_next_to

[Matthias Clasen <matthiasc src gnome org>]

commit 9a16a83c95b95f5ee2fef16a12e135d4e8ce6c48
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Oct 25 23:18:21 2011 -0400

    Fix gtk_grid_attach_next_to
    
    The function did not behave as intended when @sibling is NULL.
    Also add an example to the docs to clarify the intended behaviour.

 gtk/gtkgrid.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkgrid.c b/gtk/gtkgrid.c
index f6ec2f1..a122ad4 100644
--- a/gtk/gtkgrid.c
+++ b/gtk/gtkgrid.c
@@ -1465,6 +1465,9 @@ gtk_grid_attach (GtkGrid   *grid,
  * @side. When @sibling is %NULL, the widget is placed in row (for
  * left or right placement) or column 0 (for top or bottom placement),
  * at the end indicated by @side.
+ *
+ * Attaching widgets labeled [1], [2], [3] with @sibling == %NULL and
+ * @side == %GTK_POS_LEFT yields a layout of [3][2][1].
  */
 void
 gtk_grid_attach_next_to (GtkGrid         *grid,
@@ -1515,20 +1518,22 @@ gtk_grid_attach_next_to (GtkGrid         *grid,
       switch (side)
         {
         case GTK_POS_LEFT:
-          left = find_attach_position (grid, GTK_ORIENTATION_HORIZONTAL, 0, height, TRUE);
+          left = find_attach_position (grid, GTK_ORIENTATION_HORIZONTAL, 0, height, FALSE);
+          left -= width;
           top = 0;
           break;
         case GTK_POS_RIGHT:
-          left = find_attach_position (grid, GTK_ORIENTATION_HORIZONTAL, 0, height, FALSE);
+          left = find_attach_position (grid, GTK_ORIENTATION_HORIZONTAL, 0, height, TRUE);
           top = 0;
           break;
         case GTK_POS_TOP:
           left = 0;
-          top = find_attach_position (grid, GTK_ORIENTATION_VERTICAL, 0, width, TRUE);
+          top = find_attach_position (grid, GTK_ORIENTATION_VERTICAL, 0, width, FALSE);
+          top -= height;
           break;
         case GTK_POS_BOTTOM:
           left = 0;
-          top = find_attach_position (grid, GTK_ORIENTATION_VERTICAL, 0, width, FALSE);
+          top = find_attach_position (grid, GTK_ORIENTATION_VERTICAL, 0, width, TRUE);
           break;
         default:
           g_assert_not_reached ();