treeview: Transform motion event coords to "bin window" coords

The operations rely there on bin window relative coordinates, but we
are receiving GtkTreeView relative coordinates there. Fixes clicking
on treeview expanders, which was offset by visible headers.

diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index cc974a1653a67d4765c6a82f59b0af282dfc61e9..315a5d7ade77eb978d969d6a4281bbf277524346 100644 (file)
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -4477,18 +4477,22 @@ gtk_tree_view_motion (GtkWidget      *widget,
 
   if (tree_view->priv->tree)
     {
+      gint bin_x, bin_y;
+
       /* If we are currently pressing down a button, we don't want to prelight anything else. */
       if (gtk_gesture_is_active (tree_view->priv->drag_gesture) ||
           gtk_gesture_is_active (tree_view->priv->multipress_gesture))
         node = NULL;
 
-      new_y = MAX (0, TREE_WINDOW_Y_TO_RBTREE_Y (tree_view, y));
+      gtk_tree_view_convert_widget_to_bin_window_coords (tree_view, x, y,
+                                                         &bin_x, &bin_y);
+      new_y = MAX (0, TREE_WINDOW_Y_TO_RBTREE_Y (tree_view, bin_y));
 
       _gtk_rbtree_find_offset (tree_view->priv->tree, new_y, &tree, &node);
 
-      tree_view->priv->event_last_x = x;
-      tree_view->priv->event_last_y = y;
-      prelight_or_select (tree_view, tree, node, x, y);
+      tree_view->priv->event_last_x = bin_x;
+      tree_view->priv->event_last_y = bin_y;
+      prelight_or_select (tree_view, tree, node, bin_x, bin_y);
     }
 
   for (list = tree_view->priv->columns; list; list = list->next)