func (l *TableView) OnDrawCell(fn func(*ColumnDrawInfo)) {
	l.mtx.Lock()
	l.onDrawCell = fn
	l.mtx.Unlock()
}
func (l *TableView) OnDrawCell(fn func(*ColumnDrawInfo)) {
	l.mtx.Lock()
	l.onDrawCell = fn
	l.mtx.Unlock()
}
// OnDrawCell is called every time the table is going to display
// a cell