How do I enable editing of CellRendererProgress?
CellRendererProgress has no ‘editable’ property and doesn’t emit ‘edited’ signal – this renderer can only display the value, not edit. You have two options how to edit the value displayed: 1) easy: share a model column between CellRendererProgress and CellRendererSpin this method has a disadvantage of having two columns with the same value displayed 2) harder: subclass CellRendererProgress and add the editing capability to it see FAQ 13.45 for hints on subclassing a CellRenderer and FAQ 6.