So the safest way to do the cleaning is to: remove widgets from layout, then DELETE all created buttons with:

Qt Code:
  1. delete(btn[x]); // btn is vector with pointers
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and at the end - i can safely clear vector, and then connections will be broken, and QSignalMapper will be 'clean'? Yes? And then I can create everything again?

thanks in advance
best regards
Tomasz