PyQt6 - Color different keywords in QTableWidget cell text

[zeroalpha]

I need to change the color of a keyword if found inside the cell of a QTableWidget for PyQt6

In my example: if '1' appears in a cell,
change the color to RED

So it looks like this:

import sys

from PyQt6.QtWidgets import QApplication, QTableWidget, QTableWidgetItem

data = {'col1': ['one','highlight only 1','test'],
        'col2': ['cool','4','um'],
        'col3': ['123','1','2']}

class TableView(QTableWidget):
    def __init__(self, data, *args):
        QTableWidget.__init__(self, *args)
        self.data = data
        self.setData()
        self.resizeColumnsToContents()
        self.resizeRowsToContents()

    def setData(self):
        horHeaders = []
        for n, key in enumerate(sorted(self.data.keys())):
            horHeaders.append(key)
            for m, item in enumerate(self.data[key]):
                newitem = QTableWidgetItem(item)
                self.setItem(m, n, newitem)
        self.setHorizontalHeaderLabels(horHeaders)


def main(args):
    app = QApplication(args)
    table = TableView(data, 3, 3)
    table.show()
    sys.exit(app.exec())


if __name__ == "__main__":
    main(sys.argv)

[JonB]

@zeroalpha
You show that you want to color substring 1 wherever it appears it any cell. Since QTableWidgetItems do not accept rich/HTML text you will need one of:

• Use setCellWidget() to make every cell hold e.g. a QLabel or QTextEdit into which you put rich text with necessary coloring. Not recommended because you will have many cell widgets which is inefficient, plus you will iterate every item and alter its content to do the coloring/uncoloring.

• Write a custom QStyledItemDelegate which outputs the HTML for the cell when called. Preferable.

[zeroalpha]

@JonB Thank you. Is there a simple example somewhere of how to use the QStyledItemDelegate which outputs the HTML for the cell

[JonB]

@zeroalpha
I would Google for qstyleditemdelegate html or qstyleditemdelegate rich text. What about Displaying QTableWidgetItem's text with different colors via a QStyledItemDelegate or How to make item view render rich (html) text in Qt ?