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Editorial Team
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Asked: 2026-05-14T07:43:09+00:00

I want to make editable cells with multi-lines content in QTreeWidget and I use

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I want to make editable cells with multi-lines content in QTreeWidget and I use for this purpose QPlainTextEdit as a delegate. I need to set proper size to all rows that switching between editing and displaying went smooth, without any visible changes. 

rect = textEdit.blockBoundingRect(textEdit.firstVisibleBlock())
  • With this I can find out the height I need to set for the row, but I missing the place where I can do it.

How can I set proper height to QTreeWidget’s rows on initialization stage and how to handle it’s changes?

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1 Answer

  1. Editorial Team

    You need to reimplement delegate’s sizeHint(). It will automatically handle row’s height and width.
    And note, that QTreeWidget::uniformRowHeight property must be false in this case, though it will slow tree element rendering if it contains many rows.

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