Haha, but maybe you can combine your Editor with knizz Yet another Map Viewer if that's possible.
Yes, for refresh in real time, but i don't know how i can do :p
Edit : Individual texture editing works.
Now, i work on parameters (position, number of elements, lengh, width...) that's hard.
By the way, i repeat i need help for other programmers, i can't realize an complete Map Editor alone.