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  1. Qt Creator
  2. QTCREATORBUG-29501

Allow more configuration of the High DPI rounding policy

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    • 3726f0d6c (12.0)

    Description

      At https://doc.qt.io/qt-6/highdpi.html#environment-variable-reference we ca see:

      • QT_SCALE_FACTOR_ROUNDING_POLICY Sets the scale factor rounding policy, which is applied to the scale factor computed from screen DPI. Supported values include
        • Round (Qt 5 default)
        • PassThrough (Qt 6 default)

      https://doc.qt.io/qt-6/qt.html#HighDpiScaleFactorRoundingPolicy-enum has these values:

       

      Constant Value Description
      Qt::HighDpiScaleFactorRoundingPolicy::Round 1 Round up for .5 and above.
      Qt::HighDpiScaleFactorRoundingPolicy::Ceil 2 Always round up.
      Qt::HighDpiScaleFactorRoundingPolicy::Floor 3 Always round down.
      Qt::HighDpiScaleFactorRoundingPolicy::RoundPreferFloor 4 Round up for .75 and above.
      Qt::HighDpiScaleFactorRoundingPolicy::PassThrough 5 Don't round.

      Qt Creator has one option for setting the High DPI:

      Disabling High DPI means setting the Round policy to Floor (3). 

       

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          Bug - A problem which impairs or prevents the functions of the product. QTCREATORBUG-29461 Only integer scaling factors are supported without environment variable

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              portale Alessandro Portale
              cadam Cristian Adam
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