<![CDATA[Where does role variable for setData() functions get determined? (for debugging)]]>Please correct me if i'm wrong. From what i've figured out so far, it seems to me that the Qt::ItemFlags returned by the flags() function determine the role for the setData() function. As a result setData() not receiving Qt::CheckStateRole indicates that something's wrong with the flags() function. Is this correct?

If so, how could i possibly debug this.

]]>https://forum.qt.io/topic/126724/where-does-role-variable-for-setdata-functions-get-determined-for-debuggingRSS for NodeMon, 29 Jun 2026 10:09:27 GMTMon, 17 May 2021 14:50:57 GMT60<![CDATA[Reply to Where does role variable for setData() functions get determined? (for debugging) on Mon, 17 May 2021 15:26:07 GMT]]>@Christian-Ehrlicher Well, maybe I expressed myself a little bit clumsily, but it was indeed my implementation of the flags() function which caused the problem - a momentary lapse of reason, so to say. If i understand you correctly, then there's one more step involved: from flags() to data() to setData().

]]>https://forum.qt.io/post/660106https://forum.qt.io/post/660106Mon, 17 May 2021 15:26:07 GMT<![CDATA[Reply to Where does role variable for setData() functions get determined? (for debugging) on Mon, 17 May 2021 15:11:35 GMT]]>@andi456 said in Where does role variable for setData() functions get determined? (for debugging):

result setData() not receiving Qt::CheckStateRole indicates that something's wrong with the flags() function. Is this correct?

No. Flags don't have something to do with setData().

When you want to have a user-checkable checkbox in your view, flags() has to return Qt::ItemIsUserCheckable and data() should return something meaningful for Qt::CheckStateRole.

]]>https://forum.qt.io/post/660101https://forum.qt.io/post/660101Mon, 17 May 2021 15:11:35 GMT