Sorting qtablewidget using proxymodel



  • Hello!

    I have a qtablewidget which has a slot connected to it which is activated by the signal currentCellChanged. The slot loads information based on the cell row which is clicked.

    Now I would like sort my rows when I click on the horizontal header items. So I tried setSortingEnabled(true) after populating the qtablewidget with items. This works, but after sorting I still want the slot connected correctly, so I need to know the original row index of the clicked row.

    I read the documentation of qsortfilterproxymodel and I think this is the way to go. However I'm confused about the implementation since I did not use a table model or tableview. (Is it correct that qtablewidget is a tableview?)

    Can I set the proxymodel up as follows and how do I create the model from my qtablewidget?

    MyItemModel *sourceModel = new MyItemModel(this);
    QSortFilterProxyModel *proxyModel = new QSortFilterProxyModel(this);
    proxyModel->setSourceModel(sourceModel);
    tableWidget->setModel(proxyModel);


  • Lifetime Qt Champion

    Hi,

    You can't replace a QTableWidget's model so you'll have to go with QTableView + QStandardItemModel (or custom model you need) + QSortFilterProxyModel

    Out of curiosity, why do you need to stay at the same row after you have your data sorted ?



  • I figured out that the best solution indeed is to go with QTableView, QStandardItemModel and a QSortFilterProxyModel, because QTableWidget uses it's own internal model. Unfortunately, I already had a lot of slots etc connected to the table, so it was a little invconvenient to switch to a QTableView.

    I solved my issues by adding an extra column with the original row numbers, which I hid. Then I referred to this row indirectly. It worked, although it's not an elegant solution.


  • Lifetime Qt Champion

    I'm still curious about that fixed row when sorting



  • I’m still curious about that fixed row when sorting

    I see millions of reasons. Assume row has a file name you clicked in file manager sorted by extension. Then you sort by name to see all the files with the same name and different extension.


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