plusMinus function

dynamic plusMinus(String id, int count, dynamic callback(String id, int count), { bool countMayBeNull = false, })

Implementation

plusMinus(String id, int count,
  Function(String id, int count) callback, {bool countMayBeNull = false}) {
  // dprint("plusMinus item.count=$count $id");
  var _color = count > 1 ? aTheme.mainColor : Colors.grey;
  if (countMayBeNull)
    _color = aTheme.mainColor;
  return Row(
    mainAxisAlignment: MainAxisAlignment.spaceBetween,
    children: [
      Container(
        padding: EdgeInsets.all(3),
        decoration: BoxDecoration(
          color: _color,
          shape: BoxShape.circle,
        ),
        child: InkWell(
            onTap: () {
              if (count > 1)
                count--;
              else
                if (countMayBeNull && count == 1)
                  count--;
              callback(id, count);
            },
            child: Icon(Icons.exposure_minus_1, size: 15, color: Colors.white,)),
      ),
      SizedBox(width: 5,),
      Text(count.toString(), style: aTheme.style14W800),
      SizedBox(width: 5,),
      Container(
        padding: EdgeInsets.all(5),
        decoration: BoxDecoration(
          color: aTheme.mainColor,
          shape: BoxShape.circle,
        ),
        child: InkWell(
            onTap: () {
              count++;
              // dprint("plusMinus item.count++=$count $id");
              callback(id, count);
            },
            child: Icon(Icons.plus_one, size: 15, color: Colors.white,)),
      ),
    ],
  );
}