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Re: [Gwt-openlayers-users] Adding a Listener to a Vector Layer
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From: Edwin C. <com...@gm...> - 2009-03-05 19:36:09
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Hi Brendan,
Thanks for the patch. I will take look at it and already commit the css to
the trunk first thing tommorow morning.
If WKT works, than I'm pretty sure that KML needs some additional options
that can't be specified yet. I added a Tracker on SF to track Milestone
issues, which should list all the issues to be fixed for release 0.4 and
getting the KML Format fully working will definitely be on the list.
Greetings and thanks for all your efforts,
Edwin
2009/3/5 Brendan Grady <bre...@gm...>
> Thanks again for the response. I really appreciate your time.
>
> I'm sure you are swamped with other things, so I put together a patch for
> adding controls to the EditControlPanel. If you think it is ok, feel free
> to add it to the trunk. First time working with JSNI, so if it doesn't
> follow standards, feel free to scrap it.
>
> The following css needs to be added to your applications css:
>
> .olControlEditingToolbar {
> width: 400px!important;
> }
> .olControlEditingToolbar .olControlSelectFeatureItemActive {
> background-image: url("img/select_feature_on.png");
> background-repeat: no-repeat;
> }
> .olControlEditingToolbar .olControlSelectFeatureItemInactive {
> background-image: url("img/select_feature_off.png");
> background-repeat: no-repeat;
> }
> .olControlEditingToolbar .olControlModifyFeatureItemActive {
> background-image: url("img/move_vertex_on.png");
> background-repeat: no-repeat;
> }
> .olControlEditingToolbar .olControlModifyFeatureItemInactive {
> background-image: url("img/move_vertex_off.png");
> background-repeat: no-repeat;
> }
> .olControlEditingToolbar .olControlDragFeatureItemActive {
> background-image:
> url("openlayers/theme/default/img/move_feature_on.png");
> background-repeat: no-repeat;
> }
> .olControlEditingToolbar .olControlDragFeatureItemInactive {
> background-image:
> url("openlayers/theme/default/img/move_feature_off.png");
> background-repeat: no-repeat;
> }
>
> If you can't find the images, I can provide those too. As a zip maybe?
>
> I'm also going to take a look at the GML2,3 / KML serializer/deserializer.
> Those seem to be broken right now, though WKT serialize does seem to work,
> so I'll use that as a guideline.
>
> Brendan
>
>
>
> On Thu, Mar 5, 2009 at 8:53 AM, Brendan Grady <bre...@gm...>wrote:
>
>> Hi Edwin -
>>
>> The SelectFeature appears to be working perfectly. Thanks!
>>
>> Implementing the editing features that are in
>> http://crschmidt.net/mapping/wpserverdemo/ would make for a very
>> powerful toolset. I would be happy to test out whatever you have.
>>
>> As an aside, this is how I tested out the Select Feauture:
>>
>> SelectFeatureOptions options = new SelectFeatureOptions();
>> options.onSelect( new SelectFeature.SelectFeatureListener(){
>>
>> public void onFeatureSelected(JSObject vectorFeature) {
>> VectorFeature overlay =
>> VectorFeature.narrowToVectorFeature(vectorFeature);
>> popup = new AnchoredBubble("vector-info",
>> new LonLat(0,0),
>> new Size(300, 400),
>> "<p>" + new KML().write(overlay) + "</p>",
>> new Icon("", new Size(0, 0), new Pixel(0, 0)),
>> true);
>> map.addPopup(popup);
>> }
>>
>> });
>>
>> For some reason though, the info that popped up is not KML. It looks more
>> like this:
>>
>> OpenLayers exportExported on Thu Mar 5 08:49:56
>> EST2009OpenLayers.Feature.Vector_262No description available-0.0703125,
>> 2.4609375 -0.703125,-20.390625 ...
>>
>> Am I using the KML exporter incorrectly?
>>
>> Thanks again,
>>
>> Brendan
>>
>>
>>
>> On Thu, Mar 5, 2009 at 5:43 AM, Edwin Commandeur <
>> com...@gm...> wrote:
>>
>>> Hi there,
>>>
>>> Selecting features happens with a control in OpenLayers. I saw in the
>>> GWT-OpenLayers codebase that we are not yet wrapping the SelectFeature
>>> control. By default the SelectFeature selects features on click and you can
>>> pass it options to select on hover.
>>>
>>> So:
>>> (1) we need to add support for the select feature control => ADDED 5 min
>>> ago
>>>
>>> I added a wrapper for SelectFeature, but did not thoroughly test it...
>>> Maybe you can try it out.
>>>
>>> One caveat: The onSelect and onUnselect callback methods do not hook in
>>> with the broader OpenLayers event system. By the latter I mean that for
>>> example Vector (a vector layer object) has an Event object to register and
>>> unregister events, while the onSelect and onUnselect are just callback
>>> methods of the Control. This is why I added the Listener interfaces to the
>>> Control itself and this is why the methods onSelectFeature and
>>> onUnselectFeature return a JSObject which is a VectorFeature that you have
>>> to narrow to a VectorFeature yourself inside the method e.g.
>>> new SelectFeatureListener(){
>>> public void onSelectFeature(JSObject vectorFeature) {
>>> VectorFeature vf =
>>> VectorFeature.narrowToVectorFeature(vectorFeature);
>>> }
>>>
>>> (2) you then need to add a button to activate the SelectFeature control
>>> (and deactivate the other editing controls).
>>>
>>> Point (2) could be realised in two ways: (a) you should create your own
>>> editing toolbar using GWT (b) we could support adding controls to the
>>> Editing Toolbar. Option 2b is not yet in OpenLayers, but would not be very
>>> difficult to support this in GWT-OpenLayers. I guess that most people want
>>> an editing toolbar like this one:
>>>
>>> http://crschmidt.net/mapping/wpserverdemo/
>>>
>>> I will look into point 2b shortly, but cannot promise to have anything
>>> ready overnight.
>>>
>>> Greetings,
>>> Edwin
>>>
>>> 2009/3/4 Brendan Grady <bre...@gm...>
>>>
>>>> Hello,
>>>>
>>>>
>>>> New user to gwt-openlayers.
>>>>
>>>> Does anyone have an example of adding a "select" listener to a Vector
>>>> layer? I am adding vectors using the Editing Toolbar.
>>>>
>>>> In openlayers, I would add something like the following:
>>>>
>>>> selectControl = new OpenLayers.Control.SelectFeature(overlayLayer,
>>>> {onSelect: onFeatureSelect, onUnselect: onFeatureUnselect});
>>>>
>>>>
>>>> I tried the following, but I think I need to add something else to the
>>>> map to make the layer "selectable" as it does not seem to register that I am
>>>> over a selectable vector:
>>>>
>>>> <snip>
>>>> Vector overlayLayer = new Vector("Overlay Creation Layer");
>>>> map.addLayer(overlayLayer);
>>>> map.addControl(new EditingToolbar(overlayLayer));
>>>>
>>>> overlayLayer.addVectorFeatureSelectedListener( new
>>>> VectorFeatureSelectedListener(){
>>>>
>>>> public void onFeatureSelected(Vector source,
>>>> FeatureSelectedEvent eventObject) {
>>>> VectorFeature overlay = eventObject.getFeature();
>>>> popup = new AnchoredBubble("vector-info",
>>>> new LonLat(0,0),
>>>> new Size(300, 400),
>>>> "<p>" + new KML().write(overlay) + "</p>",
>>>> new Icon("", new Size(0, 0), new Pixel(0, 0)),
>>>> true);
>>>> map.addPopup(popup);
>>>> }
>>>>
>>>> });
>>>> </snip>
>>>>
>>>> Any suggestions?
>>>>
>>>> Thanks,
>>>> Brendan
>>>>
>>>>
>>>> ------------------------------------------------------------------------------
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>>>>
>>>>
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco,
>>> CA
>>> -OSBC tackles the biggest issue in open source: Open Sourcing the
>>> Enterprise
>>> -Strategies to boost innovation and cut costs with open source
>>> participation
>>> -Receive a $600 discount off the registration fee with the source code:
>>> SFAD
>>> http://p.sf.net/sfu/XcvMzF8H
>>> _______________________________________________
>>> Gwt-openlayers-users mailing list
>>> Gwt...@li...
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>>>
>>>
>>
>
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