To visually indicate device status in a QTableView, you can highlight entire rows by customizing the model's data() method. The QTableView view queries the model for various data roles for each cell, including Qt.BackgroundRole. By returning a QColor from your model's data() method when Qt.BackgroundRole is requested, based on conditions in the row's data, you can set a background color. Crucially, this color is applied to all cells in that row because the data() method is called for every cell, and the color decision does not depend on the column index. The example demonstrates this by coloring rows blue for "NewConnection" and green for "Registered" status. To ensure text readability on colored backgrounds, you can also handle Qt.ForegroundRole and return a contrasting text color. If the data changes dynamically, you must emit the dataChanged signal from the model to prompt the view to re-render and display the updated row colors. This approach provides a clear, data-driven method for highlighting rows in a QTableView.