topic map.graphicLayerIds and map.layerIds in ArcGIS JavaScript Maps SDK Questions

map.graphicLayerIds and map.layerIds

TyroneBiggums — Fri, 29 Jan 2016 20:12:44 GMT

Please correct me if I'm wrong:

Assume gLayer is a graphic layer and flayer is a feature layer.

If I call map.reorderLayer(gLayer, 0), I will only be reordering the map.graphicLayerIds collection where 0 is the going to appear under any other graphic layer.

If I call map.reorderLayer(fLayer, 1), I will be reordering all other layers where 1 will be just on top of the basemap but appear under all other layers.

Right?

Is there a way to reorder all layers at once? It appears that graphic layers will always appear on top of other layers.

Is there a way to send a specific layer all the way to the front (appear on top of everything)? If 0 is the basemap, and 1 is the first layer added... how can I reorder a layer to be set to the front if don't know how many total layers there are? I know how many graphic layers, and I know how many other layers there are. Ideally, if I have 5 layers on the map (including the basemap), I would want to call map.reorderLayer(fLayer, 4).

I haven't found a good way to manage the appearance order of all graphics. Must I order graphic layers and all other layers separately?

Thoughts?

Thanks!

Re: map.graphicLayerIds and map.layerIds

TracySchloss — Fri, 29 Jan 2016 20:24:09 GMT

When I want to have a layer draw on top, I've used:

var numLayers = map.layerIds.length -1

map.reorderLayer(myLayer, numLayers);

It seems like you ought to be able to find the number of graphicsLayers, adding it numLayers to make a sum total, then reorder the layer to be at the very top.

I haven't tested this, though.

Re: map.graphicLayerIds and map.layerIds

TyroneBiggums — Thu, 04 Feb 2016 20:11:12 GMT

I was partially wrong in my explanation. FeatureLayers are graphic layers, aren't they? Or, they at least show up as graphicLayerIds? These can be reordered with graphicLayerIds from a draw tool (assuming you put them in a layer).

The problem is that you cannot hide a graphic layer under another layer type. You can reorder all day long to max-1 but the graphic layers will always be on top. That's the problem.

Re: map.graphicLayerIds and map.layerIds

RobertScheitlin__GISP — Thu, 04 Feb 2016 20:12:51 GMT

This is something that is changed in 4.x API

Re: map.graphicLayerIds and map.layerIds

TyroneBiggums — Thu, 04 Feb 2016 20:16:54 GMT

I know.

But I'm in 3.14, soon to be 3.15.