Yes, you can add eventlisteners to each marker. I modified the last version of the app to demonstrate this:
http://www.elisanet.fi/marko_rautajoki/overlaygrouping/bin-release/gmapPerformanceTest4.html And ofcource the markers are not limited to being just sprites. They can be any displayobjects ( images for example ). - Marko On 21 helmi, 19:58, "[email protected]" <[email protected]> wrote: > Hi Marko- > > Looks great. Thanks for sharing your code. Have you tried adding > individual eventlisteners to each marker? Would that be possible with > your design? > > cheers > > On Feb 22, 1:19 am, "[email protected]" > > <[email protected]> wrote: > > Ok, just realized, that I really don't have to call > > fromLatLngToPaneCoords for every marker when positionOverlay fires. I > > changed the app so, that when map is panned ( i.e. zoom level does not > > change ), fromLatLngToPaneCoords is only called for one marker which > > determines the delta amount that all markers must be moved. If > > zoomlevel changes, all marker positions are recalculated with > > fromLatLngToPaneCoords. This changed the performance dramatically and > > now even firefox can handle the 1000 markers easily. The new app is > > here with view source enabled: > > >http://www.elisanet.fi/marko_rautajoki/overlaygrouping/bin-release/gm... > > > -Marko > > > On 21 helmi, 09:43, "[email protected]" > > > <[email protected]> wrote: > > > I triend grouping the markers in to a single layer. The performance is > > > indeed very much better than when using separate overlay for each > > > marker. Here is the app( i've enabled view source ): > > > >http://www.elisanet.fi/marko_rautajoki/overlaygrouping/bin-release/gm... > > > > For comparison here is the same app with default GMap markers: > > > >http://www.elisanet.fi/marko_rautajoki/overlaygrouping/bin-release/gm... > > > > I don't know if my implementation of grouping the markers is any where > > > near optimal, but still the performance seems to increase > > > significantly from using the default Markers. For some reason though, > > > performance with IE7 is much better than with Firefox ( Does anyone > > > have any idea why this is the case? ). > > > > I used a separate UIComponent on top of the map as a container for my > > > markers. This solution seemed to have a better performance than by > > > using one of the maps panes. The operation that causes the most > > > performance issues seems to be the pane.fromLatLngToPaneCoords > > > ( ... ). > > > > Even with overlay grouping the performance is not nearly perfect. For > > > example the app atthttp://madoffmap.com/performsmuchbetter and > > > even seems to have much more markers. Maybe they are not > > > using .fromLatLngToPaneCoords at madoffmap because with that many > > > markers that operation alone would cause problems... > > > > -Marko > > > > On 21 helmi, 02:41, Bryan Dunbar <[email protected]> wrote: > > > > > Pamela - Thanks for the code samples. Seems still though that when > > > > adding a > > > > lot of markers the panning slows down tremendously. > > > > > For my case I'm trying to manage layers of polygons that I'm creating by > > > > parsing an ESRI shape file and creating polygons (actually a bunch of > > > > encoded polylines). I currently have a map with all the countries of the > > > > world outlined via this technique but the pan/zoom performance is not > > > > good. > > > > So, I'm looking to create a new overlay type that is basically a > > > > collection > > > > of polylines and can pefrom when panning/zooming. > > > > > I'm going to take a shot at it. If I get anywhere with it I'll be sure > > > > to > > > > post some code. If anybody has some ideas please feel free to > > > > email/post. > > > > > Thanks, > > > > Bryan > > > > > On Fri, Feb 20, 2009 at 5:08 PM, pamela fox <[email protected]> > > > > wrote: > > > > > > Hey all- > > > > > > Bart, thanks for a great description of what you do for better > > > > > performance. I know another developer that does that with great > > > > > success as well (see:http://madoffmap.com/) > > > > > > For those looking to emulate, there are various examples of > > > > > OverlayBase subclasses here: > > > > > >http://code.google.com/apis/maps/documentation/flash/demogallery.html... > > > > > > I do want to say that we are working on improving the performance of > > > > > overlays (particularly markers) in the Flash API still - likely in the > > > > > next version. But Bart's idea is a great one to implement, regardless. > > > > > > - pamela > > > > > > On Sat, Feb 21, 2009 at 8:31 AM, Bryan Dunbar <[email protected]> > > > > > wrote: > > > > > > Bart - Do you have an example of extending overlay base? i'm in the > > > > > middle > > > > > > of implementing the idea of "layers", i.e. collection of > > > > > > polylines/polygons/markers. When I get a bunch of them on the map, > > > > > > say > > > > > for > > > > > > example a layer of the countries of the world the performance of > > > > > > panning > > > > > > zooming becomes terrible. I think implementing something like your > > > > > > custom > > > > > > overlay would be the right way to go. > > > > > > > Thanks, > > > > > > Bryan > > > > > > > On Fri, Feb 20, 2009 at 1:16 PM, [email protected] > > > > > > <[email protected]> wrote: > > > > > > >> Very interesting point Bart. This might actually solve our > > > > > >> problem. I > > > > > >> have to try this out immediately. Thanks very much for the input! > > > > > > >> - Marko > > > > > > >> On 20 helmi, 17:25, Bart <[email protected]> wrote: > > > > > >> > Marko, > > > > > > >> > A second opinion on this: > > > > > > >> > On a project where i need to load 500+ markers i found the > > > > > >> > performance > > > > > >> > of the API Markers problematic indeed, regardless of me using > > > > > >> > Flash or > > > > > >> > Flex, and any MS/Firefox/Chrome browser i try. Disappointing > > > > > >> > because i > > > > > >> > would expect a Flash API to be much more powerful in this then > > > > > >> > it's > > > > > >> > JavaScript counterpart. > > > > > > >> > Maybe this is because each individual marker is added as a > > > > > >> > separate > > > > > >> > overlay instead of grouping them all into a single overlay to > > > > > >> > manage. > > > > > >> > In my case the Javascript API is not an option and i simply > > > > > >> > decided > > > > > >> > not to use the API markers but create my own instead. > > > > > > >> > I created a class inheriting OverlayBase and load my own set of > > > > > >> > Sprite > > > > > >> > objects with custom images, event handlers etc. all into this > > > > > >> > single > > > > > >> > custom layer. No problem whatsoever the performance is great, > > > > > >> > even > > > > > >> > with 500+ sprites which all get moved around when the > > > > > >> > positionOverlay > > > > > >> > fires (the user is dragging the map). > > > > > > >> > Another benefit of creating my own custom overlay with markers > > > > > >> > is that > > > > > >> > i am not "restricted" by how the API markers & info windows work, > > > > > >> > instead i can define the "look and feel" of the map interactions > > > > > >> > myself, out of the blue... > > > > > > >> > Bart --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Maps API For Flash" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/google-maps-api-for-flash?hl=en -~----------~----~----~----~------~----~------~--~---
