Friker/alg-vis — comment on commit 5cd53fe8f5846101f6623d65ef97164ef8220f2c
File:  line 0
By Friker:

marking arrows - i will use green fill
layouting - we have made a deal about using leftw and rightw instead of invisible node. and it seems to be good to have sets separated.
code reusing - i was thinking about it and came to result that it is more clear when each method is separated
a son of a root, disabling button - yes that will be done