All other trademarks are property of their respective owners.

If you need help with specification, please contact our team on 01793 820142. Qt and respective logos are trademarks of The Qt Company Ltd. Techflow shower pumps are no longer being manufactured - instead, Pump World can offer original Techflow spare parts or an alternative unit that will match or exceed performance and quality. 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. Lastly, we update the interface to enable and disable the push buttons accordingly.ĭocumentation contributions included herein are the copyrights of If it does, we display the first contact otherwise, we display a QMessageBox to inform the user about the problem. To display the contacts that have been read from the file, we must first validate the data obtained to ensure that the file we read from actually contains address book contacts. Tr( 'The file you are attempting to open contains no contacts.')) QMessageBox ::information( this, tr( 'No contacts in file') , We declare two public slots, saveToFile() and loadFromFile(), as well as two QPushButton objects, loadButton and saveButton. Reading from a QIODevice and writing to it is as simple as opening the stream - with the respective device as a parameter - and reading from or writing to it. QFile is a subclass of the more general QIODevice class which represents many different kinds of devices.Ī QDataStream object is used to serialize binary data so that it can be stored in a QIODevice and retrieved again later.

Qt provides a number of classes for input and output, but we have chosen to use two which are simple to use in combination: QFile and QDataStream.Ī QFile object represents a file on disk that can be read from and written to.

This part covers the Qt file handling features we use to write loading and saving routines for the address book.Īlthough browsing and searching the contact list are useful features, our address book is not complete until we can save existing contacts and load them again at a later time.

Techflow Qt45 Manual Load