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Add preservePosition option to DragMarker #22

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Add preservePosition option to DragMarker #22

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10 changes: 10 additions & 0 deletions lib/dragmarker.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -80,6 +80,14 @@ class _DragMarkerWidgetState extends State<DragMarkerWidget> {
super.initState();
}

@override
void didUpdateWidget(covariant DragMarkerWidget oldWidget) {
super.didUpdateWidget(oldWidget);
if (!widget.marker.preservePosition && !isDragging) {
markerPoint = widget.marker.point;
}
}

@override
Widget build(BuildContext context) {
DragMarker marker = widget.marker;
Expand Down Expand Up @@ -338,6 +346,7 @@ class DragMarker {
final double nearEdgeRatio;
final double nearEdgeSpeed;
final bool rotateMarker;
final bool preservePosition;
late Anchor anchor;

DragMarker({
Expand All @@ -361,6 +370,7 @@ class DragMarker {
this.nearEdgeRatio = 1.5,
this.nearEdgeSpeed = 1.0,
this.rotateMarker = true,
this.preservePosition = true,
AnchorPos? anchorPos,
}) {
anchor = Anchor.forPos(anchorPos, width, height);
Expand Down