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  1. Qt
  2. QTBUG-64546

Instantiator: provide a way to set the QObject parent of the objects it creates

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    • Task
    • Resolution: Unresolved
    • P2: Important
    • None
    • None
    • Quick: Core Declarative QML
    • None

    Description

      So far, Instantiator sets the parent of anything it creates to itself. That's an acceptable default for memory management purposes, but it's not flexible enough. I think there should be a defaultParent property. The main use case I came up with so far is to be able to instantiate multiple PointHandlers (new in 5.10) to show feedback about multiple touchpoints: the parent of the handler should always be the Item within which it will receive events. And we did not make parent a settable property either, so far; so if it is instantiated with the wrong parent, it stays that way. It's anyway more efficient to construct it with the correct parent than to set it later, because reparenting would involve removing it from the QQuickItemPrivate::extraData::pointHandlers vector if its previous parent was an Item, and adding it to its new parent's vector. And that's why parent is so far not a settable property.

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          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-95316 Instantiator doesn't work inside Column

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-84730 Allow to reassign PointerHandler.parent

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

          Suggestion - Public suggestions QTBUG-17286 There is no parent property in QtObject-based QML elements

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Open

          Suggestion - Public suggestions QTBUG-83061 QML Repeater should allow creation of objects

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-60121 Row and Column Repeater children have wrong QObject parent

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

          Suggestion - Public suggestions QTBUG-15085 Provide a way to change QObject parent

          • P4: Low - Would be nice to fix, but it's not very important.
          • Open
          For Gerrit Dashboard: QTBUG-64546
          # Subject Branch Project Status CR V
          187726,21 WIP Instantiator: add defaultParent property dev qt/qtdeclarative Status: NEW -2 0
          385454,2 Instantiator: don't interfere with delegates that assign parents dev qt/qtdeclarative Status: MERGED +2 0

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              srutledg Shawn Rutledge
              srutledg Shawn Rutledge
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              Dates

                Created:
                Updated:

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                  There is 1 open Gerrit change