Hi Konrad,
Am 17.05.2022 um 17:36 schrieb Konrad Rosenbaum:
On 17/05/2022 14:58, Volker Hilsheimer wrote:
As mentioned in the JIRA ticket: perhaps a treeview, which is designed
to show rows of data, not cells of data, is not the right UI component
for the job, and the problem you try to solve seems very application
specific (I’m not aware of a native tree view on macOS or Windows that
provides a strong visual border between columns; ie macOS’s folder has
a specific Column view mode for that). Override the delegate and make
each cell stand out more if you want, or override the view’s
paintEvent and render whatever you want after the view is done. I
don’t think this belongs into QTreeView.
It is a really common requirement - if you have complex hierarchical
models then sometimes you have no choice but to display parts of the
hierarchy in a table. Unfortunately QTableView is not able to view trees
and QTreeView is sub-optimal for viewing tables. What is required is a
widget or mode of a widget that combines both abilities. I've had this
requirement in almost all of my projects that try to visualize and
interact with complex data analyses.
Sounds like QTableView is really what you want, but your model is not a
table model. You can implement a proxy model that exposes a subtree of
your tree model (possibly also hiding any remaining children). This
subtree should be usable with QTableView just fine.
I've implemented such a SubtreeProxyModel for our own needs and it works
nicely (it's not primarily used for QTableView, though).
Regards,
Arno
--
Arno Rehn
Tel +49 89 189 166 0
Fax +49 89 189 166 111
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