How to draw row selection if item delegate has been subclassed

[judethedude]

Hey everyone,

I've built a custom QStyledItemDelegate with a paint function so I can display some columns in a different way. However, this has eliminated any ability to select anything in the table, regardless of the QTableView settings (ie SingleSelection, SelectRows). This is the code for my delegate:

class RefractOverUnderDelegate(QStyledItemDelegate):
    def paint(self, painter: QPainter, option, index: QModelIndex):
        combine_columns_pairs = {
            2:None, 3:5, 7:8, 24:36, 25:37, 26:38, 27:39, 28:40, 29:41, 30:42, 31:43, 32:44, 33:45, 34:46, 35:47, 65:66
            }
        if index.column() in combine_columns_pairs.keys():
            row = index.row()
            top_col = index.column()
            bot_col = combine_columns_pairs[top_col]
            
            if combine_columns_pairs[top_col] == None:
                data_bot = ""
            else:
                data_bot = index.model().data(index.sibling(row, bot_col), 0)
            
            data_top = index.model().data(index.sibling(row, top_col), 0)
            
            data = str(data_top) + "\n" + str(data_bot)
            painter.drawText(option.rect, Qt.AlignCenter, data)
        else:
            super().paint(painter, option, index)

and this produces this kind of table:

I realize my delegate is kinda janky but I couldn't figure out a better way to do it, and I need to move on with the project.

Any recommendations for doing row selection?

Regards,
Jude

[SGaist]

Hi,

From the looks of it, your main issue is that you are not painting the selection rectangle in your delegate.

[judethedude]

@SGaist thanks for the reply. How would I go about painting the selection?

[SGaist]

As silly as it may sound: paint a transparent rectangle after you are done painting the rest of your cell.

Use the [state from your QStyleOptionViewItem to know whether you need to raw the focus rectangle.

[judethedude]

@SGaist thanks that worked!

For anyone that finds this thread, this is the code I used (courtesy of chatGPT actually):

class RefractOverUnderDelegate(QStyledItemDelegate):
    def paint(self, painter: QPainter, option, index: QModelIndex):
        if option.state & QStyle.State_Selected:
            colour = option.palette.highlight().color()
            painter.fillRect(option.rect, colour)

I found I needed to highlight (fillRect) the cell and then paint the text over the highlight.

[JonB]

@judethedude said in How to draw row selection if item delegate has been subclassed:

(courtesy of chatGPT actually)

OOI, do you know exactly how you phrased your question to ChatGPT?