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 gtk_list_box_row_set_header() or just change the state of the current header widget.
row
the row to update
the row before row, or %NULL if it is first
row,
Whenever
rowchanges or which row is beforerowchanges this is called, which lets you update the header onrow. You may remove or set a new one via gtk_list_box_row_set_header() or just change the state of the current header widget.