[Qt-interest] QLocale::toString(double) implicitly rounds?!?

[Atlant Schmidt]

Robert:

> How can I force toString to cut off, instead of round?
  Create temporary double, chop it at the desired precision, and
  then use toString() in *THAT* double.

                                             Atlant

From: qt-interest-bounces+aschmidt=dekaresearch.com at qt.nokia.com [mailto:qt-interest-bounces+aschmidt=dekaresearch.com at qt.nokia.com] On Behalf Of Schimkowitsch Robert
Sent: Tuesday, August 16, 2011 07:11
To: qt-interest at qt.nokia.com
Subject: [Qt-interest] QLocale::toString(double) implicitly rounds?!?


Hi,

is it correct that converting a double to a QString using QLocale::toString will round the number before conversion, if the given precision is insufficient to fit the number?

This is neither documented (see http://doc.qt.nokia.com/4.7/qlocale.html#toString-9, http://doc.qt.nokia.com/4.7/qstring.html#number-2 and http://doc.qt.nokia.com/4.7/qstring.html#argument-formats), nor desired in all use cases.

How can I force toString to cut off, instead of round?

Kind regards

Robert Schimkowitsch

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