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Thread: How to set UserRole within setData for QStandardItem?

  1. #1
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    Arrow How to set UserRole within setData for QStandardItem?

    I am building a tree using QStandardItemModel and populating it with QStandardItems. I am wrapping some data about each item into an object that I then aim to set as the data with role = UserRole. I am presently doing the following:
    Qt Code:
    1. QStandardItem.setData(object, role = QtCore.Qt.UserRole)
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    My question is about the documentation for setData(). It says to call setData() with:
    Qt Code:
    1. QStandardItem.setData(value, role=Qt.UserRole + 1])
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    I am confused by the "+1".

    Since Qt.UserRole = 32, does the +1 mean I should set role to 33? This seems very strange, unless I have multiple different UserRoles to employ, in which case I thought I could start with 32, and go from there. But I don't, I just have one such userRole (for now). Can I use Qt.UserRole, or do I need to start with Qt.UserRole+1?

    So far I am just using Qt.UserRole, and it seems to be working ok, but I worry there is some corner case I will hit where the thing will blow up.
    Last edited by neuronet; 13th February 2015 at 01:40.

  2. #2
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    Default Re: How to set UserRole within setData for QStandardItem?

    You can use any number between Qt::UserRole and Qt::MaxUserRole.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


  3. The following user says thank you to wysota for this useful post:

    neuronet (13th February 2015)

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