Implement waitfor, uiwait and uiresume. * liboctave/cmd-edit.h (command_editor::run_event_hooks): New static method. * liboctave/cmd-edit.cc (command_editor::run_event_hooks): Implement it. * src/graphics.h.in (listener_mode::PREDELETE): New enum value. * src/graphics.cc (<ctime>, "cutils.h"): New included headers. (base_properties::has_dynamic_properties): Look also into all_props. (gh_manager::do_execute_callback): Allow any type of function to be specified, not only function handles. (waitfor_results): New utility static variable. (compare_property_values, cleanup_waitfor_id, do_cleanup_waitfor_listener, cleanup_waitfor_postset_listener, cleanup_waitfor_predelete_listener, waitfor_listener, waitfor_del_listener): New utility static functions. (Fwaitfor): New function. * plot/uiwait.m: New function. * plot/uiresume.m: Likewise. * plot/modules.mk (plot_FCN_FILES): Add them to the list.

--- a/scripts/plot/module.mk
+++ b/scripts/plot/module.mk
@@ -190,8 +190,10 @@
   plot/uipanel.m \
   plot/uipushtool.m \
   plot/uiputfile.m \
+  plot/uiresume.m \
   plot/uitoggletool.m \
   plot/uitoolbar.m \
+  plot/uiwait.m \
   plot/view.m \
   plot/waitforbuttonpress.m \
   plot/whitebg.m \