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Add spiderfy marker limit #233

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Add spiderfy marker limit #233

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13 changes: 10 additions & 3 deletions lib/src/marker_cluster_layer.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,13 @@ class _MarkerClusterLayerState extends State<MarkerClusterLayer>

_MarkerClusterLayerState();

bool _shouldSpiderfy(MarkerClusterNode cluster) {
return widget.options.spiderfyCluster &&
(widget.options.disableSpiderfyAboveMarkerCount <= 0 ||
cluster.markers.length <=
widget.options.disableSpiderfyAboveMarkerCount);
}

bool _isSpiderfyCluster(MarkerClusterNode cluster) {
return spiderfyCluster != null &&
spiderfyCluster!.bounds.center == cluster.bounds.center;
Expand Down Expand Up @@ -623,7 +630,7 @@ class _MarkerClusterLayerState extends State<MarkerClusterLayer>
widget.options.onClusterTap?.call(cluster);

if (!widget.options.zoomToBoundsOnClick) {
if (widget.options.spiderfyCluster) {
if (_shouldSpiderfy(cluster)) {
if (spiderfyCluster != null) {
if (spiderfyCluster == cluster) {
_unspiderfy();
Expand Down Expand Up @@ -691,7 +698,7 @@ class _MarkerClusterLayerState extends State<MarkerClusterLayer>
zoomTween.begin == zoomTween.end;

if (isAlreadyFit) {
if (cannotDivide && widget.options.spiderfyCluster) {
if (cannotDivide && _shouldSpiderfy(cluster)) {
_spiderfy(cluster);
}
return;
Expand All @@ -711,7 +718,7 @@ class _MarkerClusterLayerState extends State<MarkerClusterLayer>
..removeListener(listener)
..reset();

if (cannotDivide && widget.options.spiderfyCluster) {
if (cannotDivide && _shouldSpiderfy(cluster)) {
_spiderfy(cluster);
}
});
Expand Down
5 changes: 5 additions & 0 deletions lib/src/marker_cluster_layer_options.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -130,6 +130,10 @@ class MarkerClusterLayerOptions {
/// If false remove spiderfy effect on tap
final bool spiderfyCluster;

/// If set, spiderfy will be disabled above this marker count
/// 0 -> No limit
final int disableSpiderfyAboveMarkerCount;

/// Increase to increase the distance away that circle spiderfied markers appear from the center
final int spiderfyCircleRadius;

Expand Down Expand Up @@ -210,6 +214,7 @@ class MarkerClusterLayerOptions {
this.circleSpiralSwitchover = 9,
this.spiderfyShapePositions,
this.spiderfyCluster = true,
this.disableSpiderfyAboveMarkerCount = 0,
this.polygonOptions = const PolygonOptions(),
this.showPolygon = true,
this.onMarkerTap,
Expand Down