[tasks] Use gtk_tree_view_get_tooltip_context to clarify tooltip code

[Ross Burton <rburton src gnome org>]

commit bd535808d343727effa8776df021696b55ab0d1c
Author: Ross Burton <ross linux intel com>
Date:   Fri Apr 24 17:27:37 2009 +0100

    Use gtk_tree_view_get_tooltip_context to clarify tooltip code
---
 libkoto/koto-task-view.c |   20 ++++----------------
 1 files changed, 4 insertions(+), 16 deletions(-)

diff --git a/libkoto/koto-task-view.c b/libkoto/koto-task-view.c
index 1dd7ef9..1661136 100644
--- a/libkoto/koto-task-view.c
+++ b/libkoto/koto-task-view.c
@@ -272,28 +272,16 @@ on_query_tooltip (GtkWidget *widget,
                   gpointer user_data)
 {
   GtkTreeView *treeview = GTK_TREE_VIEW (widget);
-  GtkTreeModel *model;
-  GtkTreePath *path;
+  GtkTreeModel *model = NULL;
   GtkTreeIter iter;
   KotoTask *task = NULL;
   const char *desc;
   gboolean ret = FALSE;
 
-  if (keyboard_mode)
-    return FALSE;
-
-  model = gtk_tree_view_get_model (treeview);
-
-  gtk_tree_view_convert_widget_to_bin_window_coords
-    (treeview, x, y, &x, &y);
-
-  if (!gtk_tree_view_get_path_at_pos
-      (treeview, x, y, &path, NULL, NULL, NULL))
-    return FALSE;
-
-  if (!gtk_tree_model_get_iter (model, &iter, path))
+  if (!gtk_tree_view_get_tooltip_context
+      (treeview, &x, &y, keyboard_mode,
+       &model, NULL, &iter))
     return FALSE;
-  gtk_tree_path_free (path);
 
   gtk_tree_model_get (model, &iter, COLUMN_TASK, &task, -1);
   if (!task)