[gtk+] Bug 539377 – Unnecessary warnings when GtkTreeView is not realized

[Kristian Rietveld <kristian src gnome org>]

commit 069a593b0fc73cffe2015558a0c8160c92c61465
Author: Kristian Rietveld <kris gtk org>
Date:   Thu Jul 30 14:17:00 2009 +0200

    Bug 539377 â?? Unnecessary warnings when GtkTreeView is not realized
    
    Adapt gtk_tree_view_get_path_at_pos() and
    gtk_tree_view_get_drag_dest_row() to just return FALSE when bin_window
    is NULL and not hit a warning.  Makes this case consistent with the tree
    view not having a model.  Documentation has been updated to clarify
    this, unit test has been added.
    
    Fixes bug 539377, based on a patch by Bjorn Lindqvist.

 gtk/gtktreeview.c    |   19 +++++++++++++------
 gtk/tests/treeview.c |   28 ++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+), 6 deletions(-)
---
diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index b7a0a7e..2cd794b 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -12642,7 +12642,8 @@ gtk_tree_view_get_bin_window (GtkTreeView *tree_view)
  * with the column at that point.  @cell_x and @cell_y return the coordinates
  * relative to the cell background (i.e. the @background_area passed to
  * gtk_cell_renderer_render()).  This function is only meaningful if
- * @tree_view is realized.
+ * @tree_view is realized.  Therefore this function will always return %FALSE
+ * if @tree_view is not realized or does not have a model.
  *
  * For converting widget coordinates (eg. the ones you get from
  * GtkWidget::query-tooltip), please see
@@ -12664,13 +12665,15 @@ gtk_tree_view_get_path_at_pos (GtkTreeView        *tree_view,
   gint y_offset;
 
   g_return_val_if_fail (tree_view != NULL, FALSE);
-  g_return_val_if_fail (tree_view->priv->bin_window != NULL, FALSE);
 
   if (path)
     *path = NULL;
   if (column)
     *column = NULL;
 
+  if (tree_view->priv->bin_window == NULL)
+    return FALSE;
+
   if (tree_view->priv->tree == NULL)
     return FALSE;
 
@@ -13493,9 +13496,12 @@ gtk_tree_view_get_drag_dest_row (GtkTreeView              *tree_view,
  * @pos: Return location for the drop position, or %NULL
  * 
  * Determines the destination row for a given position.  @drag_x and
- * @drag_y are expected to be in widget coordinates.
+ * @drag_y are expected to be in widget coordinates.  This function is only
+ * meaningful if @tree_view is realized.  Therefore this function will always
+ * return %FALSE if @tree_view is not realized or does not have a model.
  * 
- * Return value: whether there is a row at the given position.
+ * Return value: whether there is a row at the given position, %TRUE if this
+ * is indeed the case.
  **/
 gboolean
 gtk_tree_view_get_dest_row_at_pos (GtkTreeView             *tree_view,
@@ -13519,12 +13525,13 @@ gtk_tree_view_get_dest_row_at_pos (GtkTreeView             *tree_view,
   g_return_val_if_fail (tree_view != NULL, FALSE);
   g_return_val_if_fail (drag_x >= 0, FALSE);
   g_return_val_if_fail (drag_y >= 0, FALSE);
-  g_return_val_if_fail (tree_view->priv->bin_window != NULL, FALSE);
-
 
   if (path)
     *path = NULL;
 
+  if (tree_view->priv->bin_window == NULL)
+    return FALSE;
+
   if (tree_view->priv->tree == NULL)
     return FALSE;
 
diff --git a/gtk/tests/treeview.c b/gtk/tests/treeview.c
index c64d7ba..1402008 100644
--- a/gtk/tests/treeview.c
+++ b/gtk/tests/treeview.c
@@ -69,6 +69,33 @@ test_bug_546005 (void)
   gtk_tree_path_free (path);
 }
 
+static void
+test_bug_539377 (void)
+{
+  GtkWidget *view;
+  GtkTreePath *path;
+  GtkListStore *list_store;
+
+  /* Test provided by Bjorn Lindqvist */
+
+  /* Non-realized view, no model */
+  view = gtk_tree_view_new ();
+  g_assert (gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (view), 10, 10, &path,
+                                           NULL, NULL, NULL) == FALSE);
+  g_assert (gtk_tree_view_get_dest_row_at_pos (GTK_TREE_VIEW (view), 10, 10,
+                                               &path, NULL) == FALSE);
+
+  /* Non-realized view, with model */
+  list_store = gtk_list_store_new (1, G_TYPE_STRING);
+  gtk_tree_view_set_model (GTK_TREE_VIEW (view),
+                           GTK_TREE_MODEL (list_store));
+
+  g_assert (gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (view), 10, 10, &path,
+                                           NULL, NULL, NULL) == FALSE);
+  g_assert (gtk_tree_view_get_dest_row_at_pos (GTK_TREE_VIEW (view), 10, 10,
+                                               &path, NULL) == FALSE);
+}
+
 int
 main (int    argc,
       char **argv)
@@ -76,6 +103,7 @@ main (int    argc,
   gtk_test_init (&argc, &argv, NULL);
 
   g_test_add_func ("/TreeView/cursor/bug-546005", test_bug_546005);
+  g_test_add_func ("/TreeView/cursor/bug-539377", test_bug_539377);
 
   return g_test_run ();
 }