Qt - QTableView - Clickable button in table row

Question

I require a button/link within a table row of a QTableView. This is to open a dialog to allow that row to be edited more efficiently.

After hours of looking on the web I am yet to find a decent example.

I am aware that this is likely to be done using a QItemDelegate, but I am unsure how to have a functional widget within the row without forcing the item into edit mode first.

Any help would be greatly appreciated.

Politic

What do you mean by saying "Button in table row"? Whole row? Or in a single cell? – Theodosia

Answer 1

You could emulate the functionality of a link by underlining the clickable text, then capturing the cell click via the cellClicked(row, col) signal and check that col == editColumn. Then row would correspond to which item you are editing.

For example,

Data Name | Value 1 | Value 2 | Edit

connect (tableWidget, SIGNAL(cellClicked(int,int)), this, SLOT(editSlot(int, int)));

...

void ClassName::editSlot(int row, int col){
  if (col == 3) {
    doWork(row);
  }
}

Alemannic

Why does the accepted answer invariably fail to actually answer the question? Defining a new signal-slot connection merely to add a single static button or link to a table item at table definition time is nonsensical. Honestly, StackOverflow should just default to dynamically marking the answer currently receiving the most upvotes as "accepted." – Lamia

Answer 2

You can use setIndexWidget for that, see the Qt documentation for more information.

As an example, to embed a push button in the first column of the second row (untested code):

tableView->setIndexWidget(tableView->model()->index(2, 1), new QPushButton);

Gymnastics

I have read that on large datasets, setting a row level widget can incur a noticeable performance loss. – Politic