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  1. Qt
  2. QTBUG-47070

[REG 5.4 - 5.5] QtQuick: Decimal value cannot be correctly set to string parameter

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Details

    • a9276971aa8018837b23a847b5dee3b63b39232e

    Description

      If you have a string property in the QtQuick component and you try to set a decimal value to it in JavaScript, it is set validly to an approximate of the value. For example if you set value 3.4 to a string as

      property string myString
...
onSomeSignalHandler: myString = 3.4

      the value of myString is 3.3999999999999999. And for example with 1.1 the value is 1.1000000000000001.

      The problem is not reproducible in Qt 5.4.2.

      An example attached to reproduce the problem.

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        1. qtbug47070.zip
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          Qt Support

        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-47264 Change in double to string conversion

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          is replaced by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-42574 QVariant doesn't properly convert floats and doubles stored within it to QString.

          • P4: Low - Would be nice to fix, but it's not very important.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-47192 [REG 5.4.2->5.5,0] Conversion from QVariant to QString is broken for double and float values

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
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              ulherman Ulf Hermann
              qtcomsupport Qt Support
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              Dates

                Created:
                Updated:
                Resolved:

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