[Qt-interest] Issue with QDataWidgetMapper & QCheckBox

[Timothy Reaves]

	I have a a QDataWidgetMapper set up for a form.  There are two QCheckBoxes on this form.  The values display the checked state properly, but changes are not saved.  When I call submit() on the mapper, it fails with this error:
QSqlError(20, "Unable to fetch row", "datatype mismatch") 

	The two columns are defined as BOOLEAN in a SQLite database. When I listen to the table model beforeUpdate, the fields are being passed as QString "true" or "false".  What is the correct way to convert them to BOOLEAN?