Qt validating user input

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Now you can get everything with O'Reilly Online Learning.To purchase books, visit Amazon or your favorite retailer. See our FAQ or contact customer service: 1-800-889-8969 / [email protected] Example Code View/Submit Errata The popular open source KDE desktop environment for Unix was built with Qt, a C class library for writing GUI applications that run on Unix, Linux, Windows 95/98, Windows 2000, and Windows NT platforms.The function can change both input and pos (the cursor position) if required. Documentation contributions included herein are the copyrights of their respective owners.The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation.If a default locale has not been set, it is the operating system's locale. This virtual function returns Invalid if input is invalid according to this validator's rules, Intermediate if it is likely that a little more editing will make the input acceptable (e.g.

Exercises with fully worked out answers help you deepen your understanding of the topics.It need not result in a valid string: callers of this function must re-test afterwards; the default does nothing.Reimplementations of this function can change input even if they do not produce a valid string.Destroys the validator, freeing any storage and other resources used.This function attempts to change input to be valid according to this validator's rules.

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