I've set up a validator on a QLineEdit for entering a time interval:

Qt Code: 
  1. QRegExp exp("\\d\\d:[0-5]\\d:[0-5]\\d");
  2. lineEdit_->setValidator(new QRegExpValidator(exp, this));
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This works just fine. The problem is when I try to add an input mask. I want the colons to show up automatically. I tried:

Qt Code: 
  1. lineEdit_->setInputMask("99:99:99");
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to no avail. It won't let me enter anything. Anyone have any insight as to the proper way to mix validators and masks?

Also, if I call lineEdit_->setValidator(0), will it automatically delete the validator object that was previously being used or is there a memory leak if I don't delete it myself?

Thanks.