Whenever row changes or which row is before row changes this is called, which lets you update the header on row. You may remove or set a new one via ListBox.rowSetHeader or just change the state of the current header widget.
3.10
Whenever row changes or which row is before row changes this is called, which lets you update the header on row. You may remove or set a new one via ListBox.rowSetHeader or just change the state of the current header widget.