mstahv/g-leaflet

Simple javascript overlay based GWT API for Leaflet

g-leaflet on Vaadin Directory

g-leaflet Add-On project

g-leaflet is a fresh start for GWT API for Leaflet. Integration should become lightweight using javascript overlays, but with small compromises with to API. Hoping this project to be/become as simple and clean as Leaflet itself.

There is also Leaflet.Draw API: https://github.com/mstahv/g-leaflet-draw

Releases available via Vaadin Directory: https://vaadin.com/directory/

A small usage example and test project available at: https://github.com/mstahv/gleafletexample

Usage

When using library, developer must first call LeafletResourceInjector.ensureInjected() (XSLinker compatible!) that will injects required resources to your apps host page.

Things should also work if one includes Leaflet into host page in other manners.

Manual and JavaDocs are not yet available (pathes wellcome!). API should mimic actual Leaflet API quite a lot. Some hints can also taken from v-leaflet project (Vaadin Leaflet integration), that has defined the initial feature set. Code for it might be in a branch initially.

g-leaflet's Issues

Make slf4j-simple dependency optional

It's quite simple - there should be only one slf4j binding, and it's not up to g-leaflet to decide which one to use in dependant projects.

<source path="client"/>

The above snippet would be wonderful if it was in the gwt.xml-files.

As it is now I have to copy the whole code to my own source-tree to include this snippet in the gwt.xml-files to be able to compile the widgetset.

If it is just that I am stupid, then please tell me, but the above snippet at least solves my problem :)

Update leaflet to 1.2.0

Because of mstahv/v-leaflet#154 leaflet should be updated to the latest stable version

WmsLayerOptions does not support not specified layers

According to WMS 1.1.1 and 1.3.0 standard definition, the request url for WMS requests may be done without specifying a specific layer selection. In such a case, all server-layers will be rendered into the requested image.
In such a case, the request url may not contain the "&LAYERS=" because that is not allowed to be empty.
I think adding an isEmpty (or equals "") check in WmsLayerOptions.java and then not setting the layers option should already fix this issue.

Css in leaflet fails to compile when CssResource.enableGss flag is turned on

After turning on the Gss flag, the CSS to GSS conversion fails in leaflet.css with these errors (GWT v2.7):

                 [ERROR] Error in [auto-converted gss files from : [jar:file:/.../g-leaflet-0.4.9.jar!/org/peimari/gleaflet/client/resources/leaflet.css]][line: 504 column: 56]: GSS constant not defined: M11
                 [ERROR] Error in [auto-converted gss files from : [jar:file:/.../g-leaflet-0.4.9.jar!/org/peimari/gleaflet/client/resources/leaflet.css]][line: 504 column: 72]: GSS constant not defined: M12
                 [ERROR] Error in [auto-converted gss files from : [jar:file:/C:/.../g-leaflet-0.4.9.jar!/org/peimari/gleaflet/client/resources/leaflet.css]][line: 504 column: 88]: GSS constant not defined: M21
                 [ERROR] Error in [auto-converted gss files from : [jar:file:/C:/.../g-leaflet-0.4.9.jar!/org/peimari/gleaflet/client/resources/leaflet.css]][line: 504 column: 105]: GSS constant not defined: M22
                 [ERROR] Error in [auto-converted gss files from : [jar:file:/C:/.../g-leaflet-0.4.9.jar!/org/peimari/gleaflet/client/resources/leaflet.css]][line: 505 column: 52]: GSS constant not defined: M11
                 [ERROR] Error in [auto-converted gss files from : [jar:file:/C:/...2/g-leaflet-0.4.9.jar!/org/peimari/gleaflet/client/resources/leaflet.css]][line: 505 column: 68]: GSS constant not defined: M12
                 [ERROR] Error in [auto-converted gss files from : [jar:file:/C:/.../g-leaflet-0.4.9.jar!/org/peimari/gleaflet/client/resources/leaflet.css]][line: 505 column: 84]: GSS constant not defined: M21
                 [ERROR] Error in [auto-converted gss files from : [jar:file:/C:/.../g-leaflet-0.4.9.jar!/org/peimari/gleaflet/client/resources/leaflet.css]][line: 505 column: 101]: GSS constant not defined: M22
     [ERROR] Errors in 'org/peimari/gleaflet/client/resources/LeafletResourceInjector.java'
        [ERROR] Line 11: Failed to resolve 'org.peimari.gleaflet.client.resources.LeafletClienBundle' via deferred binding

Circle radius reported in feet instead of meters

Hi,
seems like the radius of a circle is always reported as feet, while the leaflet default should be meters (See http://leafletjs.com/reference-1.3.0.html#circle-getradius)?

Is there any way to change this to meters?

Double click on map listener

Is it possible to catch event of double click on map?
I would like to create marker on place where double click is detected.

Update Leaflet scripts to 1.0.2

literal() is not needed in -ms-filter and is actually broken

literal() is not needed for -ms-filter as the value is a simple CSS string.

Actually, it even generates broken CSS because GWT will remove the quotes inside the literal() value.
This can be seen at http://v3.tahvonen.fi/vleafletexample/ (open dev tools and search for -ms-filter – e.g. in Chrome, use the kebab menu at the top right of dev tools and select "search in all files", then search for -ms-filter)

Add worldCopyJump feature to Map object

It's present in Leaflet (http://leafletjs.com/reference.html#map-worldcopyjump) but missing in g-leaflet.

Circle radius Integer vs primitive int (in gwt hosted mode)

I think one should use primitive int instead of Integer when passing arguments to JSNI methods. For example :

public static native Circle create(LatLng latlng, Integer radius, CircleOptions circleOptions)
    /*-{
        return new $wnd.L.Circle(latlng, radius, circleOptions);
    }-*/;

When calling getRadius further on, I've got the following exception (in hosted mode) :

uncaught exception: com.google.gwt.dev.shell.HostedModeException: Something other than an int was returned from JSNI method '@XXXXXXXXXX.Circle::getRadius()': JS value of type Java Object com.google.gwt.dev.shell.JsValueOOPHM$DispatchObjectOOPHM, expected int

It's not really a big deal since the hosted mode should soon be deprecated...

MapWidget 100% height not work

I try to setting a full map page but it's not work

DragListener

It would be useful to implement DragListener on EditableMap.

Save extra data to marker (or layer)

It should be possible to add custom extra data to marker.
In original library we can do it just by passing key-value while creating marker object.
Is it possible to add this function to library?