bitbake/goggle: automatically show most recently added message

It seems likely that the user would want to view the most recently emitted
messages so this patch sets the message dislay treeview to scroll to any
newly added rows.

Signed-off-by: Joshua Lock <josh@linux.intel.com>

bitbake/lib/bb/ui/goggle.py

@@ -33,6 +33,9 @@ def event_handle_idle_func (eventHandler, build):
 
     return True
 
+def scroll_tv_cb (model, path, iter, view):
+    view.scroll_to_cell (path)
+
 class MainWindow (gtk.Window):
     def __init__ (self):
         gtk.Window.__init__ (self, gtk.WINDOW_TOPLEVEL)
@@ -55,6 +58,7 @@ def init (server, eventHandler):
     # Create the object for the current build
     running_build = RunningBuild ()
     window.cur_build_tv.set_model (running_build.model)
+    running_build.model.connect("row-inserted", scroll_tv_cb, window.cur_build_tv)
     try:
         cmdline = server.runCommand(["getCmdLineAction"])
         print(cmdline)