Center keeps updating

[hvisser]

I have a map with a custom projection (crs) for which I set the center. What I observe is that the onmoveend is fired from leaflet again, in response to updating the map center model. I noticed that cc1388f looks like an attempt to fix this, but that does not work for me. In the center directive the changingModel is set to false, but the onmoveend event fires after setting that var, causing the center to be updated again. I'm not sure how to fix this properly, but I can of course assist in helping you fix this ;)

[hvisser]

It also looks like the changingModel flag is not updated correctly in all cases; there are multiple code paths that call map.setView() or map.locate() without updating that flag. I'll try to make a fix soonish...

[tombatossals]

Yes, this is a hard problem to solve, the cc1388f was trying to give priority to the centerModel, because in the middle of a conflict always won the "moveend", so, for example, cases like this occurred:

• Changed the zoom and the zoom transition starts and last for 1 sec.
• In the middle of this 1 sec. interval the centerModel was updated.
• The zoom transition end and the centerModel update was discarded because "zoomend" had priority over the rest.

The commit you mention semeed to solve this. I will take a look carefully at your commit, but could you post a jsfiddle example where I can see the conflict you mention?

[hvisser]

I'm having some trouble reproducing the bug in a fiddle, I'm not sure why, I'll try to reproduce it in a separate sample project. Here's the fiddle anyway http://jsfiddle.net/hvisser/WLc3G/ It's the same setup I used, though the version of proj4js is different (maybe that is what is triggering the bug? On the other hand, I tried replacing proj4js with different versions but that didn't work for me before).

[hvisser]

Actually, the fiddle does show the bug, here is a variant without the custom layer: http://jsfiddle.net/hvisser/WLc3G/1/
When you move the map, the map keeps moving, because the center keeps updating.

[sompylasar]

Possibly related: #398

[NOtherDev]

I had a similiar problem - an infinite digest loop on random map movements and zooms with URL center functionality turned on. The moveend map event handler publishes the event to update the URL, which is rounded to 4 decimal points and gets published as new center, which in turn makes map move again and trigger moveend event eventually. In bad cases it ended up in Angular detecting infinite cycle.

I've fixed it by adding floating point rounding consistent with other parts of the code - see pull request #414.

[nmccready]

So in my baseMap factory which I utilize in my controller I always throttle the mosemove and maybe the mouseend end events. See here http://stackoverflow.com/questions/16645766/google-maps-api-v3-no-smooth-dragging

[nmccready]

I also do my darnedest to implement something similar to google maps idle event since leaflet has none.

See here and my comment about issues with moveend and load http://stackoverflow.com/questions/23622644/leaflet-map-event-equivalent-to-google-map-idle-event

Leaflet/Leaflet#3178

[nmccready]

Is this still a problem?

[nmccready]

closing until I get feedback.