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  1. Qt
  2. QTBUG-98127

Weighted layout behavior is not documented

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    • fe66830abe869d7e7244c77779c9ff7aa51037c3 (qt/qtdeclarative/dev) 463d16de5d41647267008fdd4a6460b8c00f5434 (qt/qtdeclarative/6.2)

      When preferredWidth/Height is set with fillWidth/Height, layouts use preferredWidth/Height as a weight when laying out elements. For example this reserves 2/3 for the red and 1/3 for the blue rectangle:

          RowLayout {
        anchors.fill: parent

        Rectangle {
            Layout.fillWidth: true
            Layout.fillHeight: true
            Layout.preferredWidth: 100
            color: "red"
        }
        Rectangle {
            Layout.fillWidth: true
            Layout.fillHeight: true
            Layout.preferredWidth: 50
            color: "blue"
        }
    }

      This behavior does not seem to be mentioned in the documentation:

      https://doc.qt.io/qt-5/qml-qtquick-layouts-layout.html#fillWidth-attached-prop
      https://doc.qt.io/qt-5/qml-qtquick-layouts-layout.html#preferredWidth-attached-prop

        For Gerrit Dashboard: QTBUG-98127
        # Subject Branch Project Status CR V
        384017,2 Doc: Make algorithm for distributing sizes in layouts more explicit dev qt/qtdeclarative Status: MERGED +2 0
        384997,2 Doc: Make algorithm for distributing sizes in layouts more explicit 6.2 qt/qtdeclarative Status: MERGED +2 0

            kkohne Kai Köhne
            poikelin Joni Poikelin
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              Created:
              Updated:
              Resolved:

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