update to latest flutter version for iOS and Android in example closes #68 and #67 also upgrades to null safe latlong2 several of the packages use giturls to reference nullsafe branches

My markers have diffrent types (icons, colors and dedicated type field). At the moment they are all grouped together. How about customization of grouping marker ? I remember once seeing grouping marker with a colorful circle around with sections depending on amount of specific markers. I can't find this example now. Also Leaflet allows for customized group marker (which could help achieve this result). Any suggestions ? Thnanks for great plugin !

The two clusters you see in the video each have 2 Markers at same lat long. When I press the top left cluster, it centers and then "explodes" But when I press the bottom right cluster, it just centers. For it to show the contents, I need to press one more time.

Sorry that this issue turned out to be an issue cluster. pun intended :D I think it can help other users too.

I have a couple of questions:

1. How can I make it such that users don't need to press it a second time to see the singular markers? (just like top left cluster)
2. How can I un-explode the singular markers back to the cluster state, once the user presses on an empty space in the map. I see there is a similar API for popUpController.hideAll but I guess popups are something different than the markers. I handle the onPressed of the markers within the widgets.
3. When we explode the cluster, cluster icon's opacity is decreased and stays at the same place. When user presses it, we un-explode the cluster back. How can we customize the appearance of the exploded state of the cluster widget? let's say I want to put there a more explanatory icon like "close - X".
4. Is there a way to catch cluster onPressed events and decide if we want to explode and unexplode markers? Let's say maybe I want to keep the contents of several clusters in an expanded state.
5. Before using this plugin, I was able to animate the show/hide states of markers in the MarkerLayerOptions.markers. Now that I carried those markers under MarkerClusterLayerOptions.markers, the AnimatedOpacity don't work anymore. I guess there is a problem with the state object somewhere. (I don't use children property. instead put all my markers under layers)

https://user-images.githubusercontent.com/6442915/177625477-90bed625-ab06-4180-b782-512cdb0bab2e.mov

On another note, you can see that the exploded cluster disappears from the right edge of the screen. I was struggling with this issue on the parent flutter_map and have an open PR https://github.com/fleaflet/flutter_map/pull/1291 I was using my own branch but unfortunately I am forced to use the main flutter_map along with this cluster plugin (even if I branched out of flutter_map: ^1.1.1)

• Is there a way to use and test out cluster plugin with my branch without pub get dependency errors?
• And would my PR fix disappearing clusters and help out this plugin somehow? In the code I could not see where the Rect size was set for the spider rect.

https://user-images.githubusercontent.com/6442915/177626183-f31fef1b-113d-4fb8-a8ac-8491ade4f047.mov

Hello There,

Thank you for such a nice plugin, I am using StreamBuilder and when ever new data is loaded from the backend, I create set of markers (Marker objects) and then provide to this plugin. Problem is new markers are not loading, even i tried to run SetState() as well. Any solution or work around to make it properly functional? This plugin is very important for us.

https://user-images.githubusercontent.com/8264639/164356431-af4cc528-a1eb-4032-b7b5-1346717d9fb6.mov

Similar to fleaflet/flutter_map#864 I added rotate option to flutter_map_marker_cluster We must wait for https://github.com/rorystephenson/flutter_map_marker_popup/pull/17 to be merged to remove dependency_overrides

At certain zoom levels the markers don't separate when tapped sometimes the user can still pinch to zoom in separating the markers other times the user can can tap a marker and the animation will complete but the fab will not transition out completely (this might be intended functionality)

examples group a (2 markers zoom level x)

• map centers when tapped but doesn't zoom and separate
• user zooms in markers separate

group b (2 markers zoom level x)

• map doesn't center markers separate fab button is half faded out
• user zooms in and markers recombine when you tap again first interaction repeats

group c (4 markers zoom level x)

• map centers when tapped but doesn't zoom and separate
• user zooms in markers separate

map options

        maxZoom: 18.0,
        zoom: 16.0,

MarkerCluster

          height: 40,
          width: 40,
          fitBoundsOptions: FitBoundsOptions(
            padding: EdgeInsets.all(40),
          ),

any help would be appreciated in resolving these

I want to refresh map and groupings with dynamic list of markers. The grouping works only first time, if list is empty then updated and setState called map does not refresh. This obviously works on regular map. I attach modified example main to show the problem.

main.dart.txt

Running "flutter pub get" in video_tutorial...
Because flutter_map_marker_cluster 0.5.0 depends on flutter_map ^1.0.0 and no versions of flutter_map_marker_cluster match >0.5.0 <0.6.0, flutter_map_marker_cluster ^0.5.0 requires flutter_map ^1.0.0. So, because bare_bones depends on both flutter_map ^2.0.0 and flutter_map_marker_cluster ^0.5.0, version solving failed. pub get failed (1; So, because bare_bones depends on both flutter_map ^2.0.0 and flutter_map_marker_cluster ^0.5.0, version solving failed.) exit code 1

The only way to run is to add;

dependency_overrides:
  flutter_map: ^2.0.0

This happens sometimes and especially when I try to pinch&zoom. And the error goes away once we pan the map.

Also when the user presses on the permission button and the OS presents the location permission dialog, this error gets triggered more often. The video is from a release build. In the debug build, we get the red error screen all over the map. And after a hot restart, the error goes away (cmd+s)

Notes: the cat marker is not part of a cluster marker. It lives at the last layer, above the cluster marker layers. And as you can see, it renders correctly The moment I remove MarkerClusterLayerOptions from the code, error does not happen.

Has anyone came across with this problem before? @lpongetti if you have some time and have any leads, I would be glad to help solve this issue along with you. Thanks for this awesome plugin.

EDIT: Line 200 is the problematic line as the debugger shows.

Seems like we use the _clusterManager.spiderfyCluster!.markers while spiderfyCluster is null. Would a simple spiderfyCluster != null check fix this?

https://user-images.githubusercontent.com/6442915/178124885-1970892d-e3fe-4a75-b4c5-a0f3fbd061bd.mov

Hello, I'm working on a web project that uses flutter_map_marker_cluster and adding the hovers on markers using clusters is an important feature of my project. If buildPopupOnHover is set to true, a MouseRegion will encapsulates the marker.builder (within the GestureDetector) and the popup will be built when the marker is hovered. When tapping a Marker, only the onMarkerTap method will be called. I also added two methods : onMarkerHoverEnter and onMarkerHoverExit which follow the spirit of onMarkerTap : they're called respectively on hover enter and on hover exit. Finally, I added a timer before the popup is shown, this timer is set to 300 ms by default.

I hope we can do something for the hovering feature to be added as it can be very useful for web projetcs.

Thanks for reading!

Hi,

I'm in the case where I have 6000+ markers on my map. I give the user the possibility of filter those markers (with some pre-defined filters).

The issue is each time I change my filter, there is a recalcultation for the cluster and it create a UI freeze. It is possibile to have this recalculation in a async way ? Or do the recalculation to inside another Thread than the UI Thread ?

I noticed that for my use-cases I was bottle-necked by UI-thread utilization, frequently missing the 60FPS mark and starving the rasterization pipeline.

At first I took a stab with the profiler and did some micro-optimizations with some small success (though hope the code got a bit simpler too). Afterwards, I realized that the node-trees geographical partitioning is greatly suited to reduce the amount of work that needs to be done. Today, we're going though all markers to then cull them if they're not on screen. However we can dismiss entire clusters early.

Measured widget build times:

• Before: 1446.1636363636364 +/- 480.1128944372966
• After: 1453.418181818182 +/- 336.8953811663788

i.e. a 87% reduction. However, looking at the performance overlay implies the impact is even larger (inline with what I experienced with the micro-optimizations).

• Before:
• After:

flutter_map_marker_cluster: 1.0.1

_CastError: Null check operator used on a null value
  File "map_calculator.dart", line 27, in MapCalculator.clusterPoint
  File "map_calculator.dart", line 33, in MapCalculator.boundsContainsCluster
  File "marker_cluster_layer.dart", line 329, in _MarkerClusterLayerState._buildMarkerClusterLayer
  File "marker_cluster_layer.dart", line 271, in _MarkerClusterLayerState._buildLayer
  File "marker_cluster_layer.dart", line 527, in _MarkerClusterLayerState._buildLayers.<fn>
  File "marker_cluster_node.dart", line 72, in MarkerClusterNode.recursively
  File "cluster_manager.dart", line 160, in ClusterManager.recursivelyFromTopClusterLevel
  File "marker_cluster_layer.dart", line 524, in _MarkerClusterLayerState._buildLayers
  File "marker_cluster_layer.dart", line 148, in _MarkerClusterLayerState.build
  File "framework.dart", line 4992, in StatefulElement.build
  File "framework.dart", line 4878, in ComponentElement.performRebuild
  File "framework.dart", line 5050, in StatefulElement.performRebuild
  File "framework.dart", line 4604, in Element.rebuild
  File "framework.dart", line 5082, in StatefulElement.update
  File "framework.dart", line 3570, in Element.updateChild
  File "framework.dart", line 4904, in ComponentElement.performRebuild
  File "framework.dart", line 4604, in Element.rebuild
  File "framework.dart", line 2667, in BuildOwner.buildScope
  File "layout_builder.dart", line 153, in _LayoutBuilderElement._layout
  File "object.dart", line 2246, in RenderObject.invokeLayoutCallback.<fn>
  File "object.dart", line 1035, in PipelineOwner._enableMutationsToDirtySubtrees
  File "object.dart", line 2246, in RenderObject.invokeLayoutCallback
  File "layout_builder.dart", line 228, in RenderConstrainedLayoutBuilder.rebuildIfNecessary
  File "layout_builder.dart", line 316, in _RenderLayoutBuilder.performLayout
  File "object.dart", line 2135, in RenderObject.layout
  File "box.dart", line 2418, in RenderBox.layout
  File "layout_helper.dart", line 56, in ChildLayoutHelper.layoutChild
  File "stack.dart", line 595, in RenderStack._computeSize
  File "stack.dart", line 622, in RenderStack.performLayout
  File "object.dart", line 1973, in RenderObject._layoutWithoutResize
  File "object.dart", line 999, in PipelineOwner.flushLayout
  File "binding.dart", line 513, in RendererBinding.drawFrame
  File "binding.dart", line 884, in WidgetsBinding.drawFrame
  File "binding.dart", line 378, in RendererBinding._handlePersistentFrameCallback
  File "binding.dart", line 1175, in SchedulerBinding._invokeFrameCallback
  File "binding.dart", line 1104, in SchedulerBinding.handleDrawFrame
  File "binding.dart", line 1015, in SchedulerBinding._handleDrawFrame
  File "zone.dart", line 1391, in _rootRun
  File "zone.dart", line 1293, in _CustomZone.run
  File "zone.dart", line 1201, in _CustomZone.runGuarded
  File "hooks.dart", line 150, in _invoke
  File "platform_dispatcher.dart", line 318, in PlatformDispatcher._drawFrame
  File "hooks.dart", line 115, in _drawFrame

Hi. MarkerTapBehavior.togglePopupAndHideRest doesnt work as expected. When I tap to the Marker popUp is appear, but when I tap one more time to that marker, popUp doesnt dissapear.

popupState.selectedMarkers is always empty and contains(marker) is always return false

This was tested for the example code of the flutter_map_marker_cluster

When we create new markers or remove some while the map is open, the old markers wouldn't update and let the new appear or disappear. So I just reseted the markers as did in the initState (marker_cluster_layer.dart) in the build so for each state change the markers would reset.

Hi!

I was looking for some way to customize the appearance of the cluster marker when spiderfied but have found it's all hardcoded. While it was trivial to fork and replace this code with something that fulfills my requirements, I thought it would be valuable to others to make the marker customizable with a builder.

This pull request contains additional options in AnimationsOptions, when not set, the current behavior with opacity animation is maintained. But with spiderfyAnimationBuilder you can replace it with anything else. The function takes child argument which is the original cluster marker widget and animation which is by default a tween from 1.0 to 0.3 like it was hardcoded before, and also MarkerClusterNode node for more complex use cases that involve building the widget based on the marker data. Also, the default tween can be replaced with spiderfyTween option.

Please let me know what do you think of this.