OpenLayers layer support (was [fusion-users] Fusion + MapServer Function/Look Like MapGuide)
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Paul Spencer-2
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Mike,
it may be useful to expose a setting in the Extension to control baseLayer. Or more usefully a way to set any OpenLayers Layer constructor properties through the ApplicationDefinition. Is this possible? Paul On 16-Jul-08, at 9:28 AM, Mike Adair wrote: > I'm starting to work on this again, so like Paul says, feedback > would be very helpful. What I have so far, is that the > ApplicationDefinition would define multiple Map elements in the > MapGroup element like so: > > <MapGroup id="multimap" xsi:type="MapType"> > <Map xsi:type="MapGuideLayerType"> > <Type>MapGuide</Type> > <SingleTile>true</SingleTile> > <Extension> > <ResourceId>Library://Samples/Sheboygan/Maps/ > Sheboygan1.MapDefinition</ResourceId> > </Extension> > </Map> > <Map xsi:type="MapGuideLayerType"> > <Type>MapServer</Type> > <SingleTile>true</SingleTile> > <Extension> > <MapFile>/ms4w/apps/gmap/htdocs/gmap75.map</MapFile> > </Extension> > </Map> > </MapGroup> > > and the first one would become the baseLayer, the Type element would > (in theory) accept any OpenLayers.Layer.* type and there would be a > 1:1 mapping of OL layer properties in the <Extension> element. There > remains some questions around the establishing a session and the > LoadMap.php call for the various layer types and how to make it work > for vector layers. > > I'll be setting up a sandbox for this work today. > > Mike > > > > Paul Spencer wrote: >> It should be possible :) You will need to spend some quality time >> with firebug probably, but in essence you can get access to the >> OpenLayers.Map instance and then do whatever you want. I would >> probably approach it like this: >> >> window.onload=function(){ >> Fusion.registerForEvent(Fusion.Event.FUSION_INITIALIZED, >> fusionInitialized); >> Fusion.registerForEvent(Fusion.Event.FUSION_ERROR, fusionError); >> Fusion.initialize(); >> } >> >> function fusionError(eventId, error) { >> console.log('Fusion Error: '+error.toString(); >> } >> >> function fusionInitialized(eventId) { >> var map = Fusion.getWidgetById('Map'); // the id of the div >> containing the map >> var olMap = map.oMapOL; >> var wms = new OpenLayers.Layer.WMS(/* parameters */); >> olMap.addLayer(wms); >> } >> >> You will probably run into difficulty with the whole baseLayer >> thing in OpenLayers. By default, most tile-based layers want to be >> base layers and you need to add isBaseLayer: false to the layer >> options (4th arg to WMS layer, might be different in other layer >> types). >> >> You can also start Fusion without a map loaded and inject a >> baseLayer using this method, but then a whole bunch of things won't >> really work - for instance a lot of widgets only get enabled after >> a map has loaded. >> >> Some feedback on *how* this should work would be appreciated. If >> you have a particular use case and would like to be able to set >> things up in a particular way, that would be very useful to the >> developers as we plan out exposing more OpenLayers stuff. >> >> Cheers >> >> Paul >> >> On 16-Jul-08, at 1:42 AM, David Percy wrote: >> >>> Paul, thanks for the explanation on the tiling. >>> >>> I've actually been waiting to use and contribute to Fusion until >>> the tiling was in place, as we currently use kamap for our tiling >>> engine for the US geological survey, and it really helps. We are >>> just working with Mootools and Openlayers, but I'd be happier if >>> we were contributing to an active project, like Fusion, since >>> that's the open source spirit. >>> >>> Is there a way to "wire" the unsupported Openlayers layer types >>> into a Fusion app? It doesn't seem like it should be too >>> difficult, but I was worried about making things hard to migrate >>> once the Fusion framework supports it. >>> >>> I'd appreciate any thoughts you (or others on the PSC) have on this. >>> Cheers, >>> Percy >>> >>> Paul Spencer wrote: >>>> Hi Tim, >>>> you can get a Fusion application to look essentially like that >>>> application using mapserver. The tiling capability on the client >>>> side is implemented by OpenLayers, so there is nothing magically >>>> mapguide about it. However, there is no support in the >>>> ApplicationDefinition to let you define a tiled mapserver layer. >>>> We are working on supporting all the OpenLayers layer types >>>> through the ApplicationDefinition for the 1.1 release but this >>>> work has not yet been done. >>>> Even when the necessary hooks in Fusion are available, you will >>>> still need something on the server side to generate the tiles. >>>> You can use mapserver to do this directly, but it is pretty >>>> inefficient since mapserver will draw the same tile over and over >>>> again. What you need is something that will cache tiles for you >>>> and serve them from the cache if available. For this, we will be >>>> recommending either the kaMap's tile.php or TileCache. >>>> Cheers >>>> Paul >>>> On 14-Jul-08, at 4:22 PM, Nolte, Tim wrote: >>>>> OK, I know this is probably wishful thinking. AS I've looked at >>>>> the >>>>> MapGuide live app gallery. And specifically the following demo: >>>>> >>>>> http://data.mapguide.com/mapguide/phpviewersample/ajaxviewersample.php >>>>> >>>>> I would like to get Fusion (1.0.6) functioning and looking like >>>>> that >>>>> demo but using UMN MapServer. Is this even possible? Something >>>>> I'm also >>>>> wondering about is the Tiled AJAX sample. Is the tiling something >>>>> specific and built in to MapGuide? I'm assuming the tiling is >>>>> something >>>>> on the server side and nothing to do with Fusion? >>>>> >>>>> - Tim >>>>> >>>>> ---- >>>>> Timothy J Nolte - [hidden email] >>>>> Network Planning Engineer >>>>> >>>>> iPCS Wireless, Inc. >>>>> 4717 Broadmoor Ave, Suite G >>>>> Kentwood, MI 49512 >>>>> >>>>> Office: 616-656-5163 >>>>> PCS: 616-706-2438 >>>>> Fax: 616-554-6484 >>>>> Web: www.ipcswirelessinc.com >>>>> _______________________________________________ >>>>> fusion-users mailing list >>>>> [hidden email] >>>>> http://lists.osgeo.org/mailman/listinfo/fusion-users >>>> __________________________________________ >>>> Paul Spencer >>>> Chief Technology Officer >>>> DM Solutions Group Inc >>>> http://www.dmsolutions.ca/ >>>> _______________________________________________ >>>> fusion-users mailing list >>>> [hidden email] >>>> http://lists.osgeo.org/mailman/listinfo/fusion-users >>> >>> -- >>> David Percy >>> Geospatial Data Manager >>> Geology Department >>> Portland State University >>> http://gisgeek.pdx.edu >>> 503-725-3373 >> >> >> __________________________________________ >> >> Paul Spencer >> Chief Technology Officer >> DM Solutions Group Inc >> http://www.dmsolutions.ca/ >> >> _______________________________________________ >> fusion-users mailing list >> [hidden email] >> http://lists.osgeo.org/mailman/listinfo/fusion-users >> __________________________________________ Paul Spencer Chief Technology Officer DM Solutions Group Inc http://www.dmsolutions.ca/ _______________________________________________ fusion-dev mailing list [hidden email] http://lists.osgeo.org/mailman/listinfo/fusion-dev |
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