When editing a variable or value, the actual value is now shown. The choice

of active frame reference, row, and loop instance affects this value, as it
should.

- obj.c (run_loops): reset loop->curr_value to UNDEF when instantiation is done
- obj.c (generate_frame): reset frame->curr_parent to NULL when instantiation
  is done
- expr.c (eval_var, eval_string_var): distinguish beteen instantiation and
  editing mode, and use "active" values in the latter
- gui_frame.c (edit_var, edit_value, edit_value_list): display the value of the
  variable or the active expression in the "X" field
- gui_frame.c (assignment_value_select_event, table_value_select_event,
  loop_from_select_event, loop_to_select_event): pass the frame to edit_value
  and edit_value_list
- expr.c (str_unit): since we may now accidently expose a wider range of
  exponents, removed -2 ... 2 exponent range limitation



git-svn-id: http://svn.openmoko.org/trunk/eda/fped@5788 99fdad57-331a-0410-800a-d7fa5415bdb3

obj.c

@@ -1,8 +1,8 @@
 /*
  * obj.c - Object definition model
  *
- * Written 2009 by Werner Almesberger
- * Copyright 2009 by Werner Almesberger
+ * Written 2009, 2010 by Werner Almesberger
+ * Copyright 2009, 2010 by Werner Almesberger
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -239,6 +239,7 @@ static int run_loops(struct frame *frame, struct loop *loop,
 		n++;
 	}
 	loop->initialized = 0;
+	loop->curr_value = UNDEF;
 	if (active) {
 		loop->n = from.n;
 		loop->iterations = n;
@@ -279,6 +280,7 @@ static int generate_frame(struct frame *frame, struct coord base,
 	frame->curr_parent = parent;
 	ok = iterate_tables(frame, frame->tables, base, active);
 	inst_end_frame(frame);
+	frame->curr_parent = NULL;
 	return ok;
 }