flutter disable left side scrolling
class CustomScrollPhysics extends ScrollPhysics {
CustomScrollPhysics({this.parent}) : super(parent: parent);
final ScrollPhysics? parent;
bool isGoingLeft = false;
@override
CustomScrollPhysics applyTo(ScrollPhysics? ancestor) {
return CustomScrollPhysics(parent: buildParent(ancestor));
}
@override
double applyPhysicsToUserOffset(ScrollMetrics position, double offset) {
isGoingLeft = offset.sign < 0;
return offset;
}
@override
double applyBoundaryConditions(ScrollMetrics position, double value) {
//print("applyBoundaryConditions");
assert(() {
if (value == position.pixels) {
throw FlutterError(
'$runtimeType.applyBoundaryConditions() was called redundantly.n'
'The proposed new position, $value, is exactly equal to the current position of the '
'given ${position.runtimeType}, ${position.pixels}.n'
'The applyBoundaryConditions method should only be called when the value is '
'going to actually change the pixels, otherwise it is redundant.n'
'The physics object in question was:n'
' $thisn'
'The position object in question was:n'
' $positionn');
}
return true;
}());
if (value < position.pixels &&
position.pixels <= position.minScrollExtent) {
return value - position.pixels;
}
if (position.maxScrollExtent <= position.pixels &&
position.pixels < value) {
return value - position.pixels;
}
if (value < position.minScrollExtent &&
position.minScrollExtent < position.pixels) {
return value - position.minScrollExtent;
}
if (position.pixels < position.maxScrollExtent &&
position.maxScrollExtent < value) {
return value - position.maxScrollExtent;
}
if (!isGoingLeft) {
return value - position.pixels;
}
return 0.0;
}
}
ListView(
physics: CustomScrollPhysics(),
)