Thanks for the help. I was able to track it down to errors in my parent(…)
method. I was just returning:
return createIndex(0, 0, some_unique_value);
which apparently works just fine for tree views but not for QColumnView.
Now on to figure out how to display checkboxes next to each item. I've tried:
Qt::ItemFlags ImportDataStructureModel::flags(const QModelIndex& index) const
{
if(!index.isValid())
{
return {};
}
return Qt::ItemIsUserCheckable | Qt::ItemIsSelectable |
QAbstractItemModel::flags(index);
}
Which does not seem to show anything. I'll probably have to create a custom
delegate.
--
Mike Jackson
--
Michael Jackson | Owner, President
BlueQuartz Software
[e] mike.jack...@bluequartz.net
[w] www.bluequartz.net
On 5/3/22, 6:07 PM, "Scott Bloom" <mailto:sc...@towel42.com> wrote:
I have found when I use a custom model, most issues using views, are tied to an
issue of some corner case condition in the model not being handled correctly.
~~Scott
-------- Original message --------
From: Michael Jackson <mike.jack...@bluequartz.net>
Date: 5/3/22 3:05 PM (GMT-08:00)
To: Scott Bloom <sc...@towel42.com>, Qt Interest List <interest@qt-project.org>
Subject: Re: QColumnView and QTreeView using same model
No idea that existed. Now just trying to figure out how to translate qmake
instructions to modern CMake instructions to be able to link against it.
--
Mike Jackson
On 5/3/22, 4:41 PM, "Scott Bloom" <mailto:sc...@towel42.com> wrote:
Have you run the modeltest on it?
Scott
From: Interest <interest-boun...@qt-project.org> On Behalf Of Michael Jackson
Sent: Tuesday, May 3, 2022 12:57 PM
To: Qt Interest List <interest@qt-project.org>
Subject: [Interest] QColumnView and QTreeView using same model
I have a custom QAbstractItemModel implementation that works correctly when
using a QTreeView, i.e., I can open the complete hierarchy of the tree without
any issues. I switched up to the QColumnView due to size constraints and now
using the same exact instance of the model I can only navigate into the first
item that has children. Other items at the root level that have children are
shown with the little graphic arrow as having children but none of the children
are actually listed in the next column over. I even put both the QTreeView and
the QColumnView into my Widget at the same time with the same instance of the
model and the QTreeView does not have any problems displaying the various
levels.
Has anyone else seen something like this? I took at look at the Qt bug database
and nothing really stuck out. I tried a QFileSystemModel for giggles and that
worked as expected. So clearly I’ve got something sort of messed up in my
custom model that allows the treeview to work but not the columnview. Odd.
--
Mike Jackson
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