[Users] Examples of GeoExt

[Christian Mayer]

Hi,

your map detection seems OK, this looks more like a problem with ExtJS
itself. Try

me.store = treeStrore; instead of me.setStore(treeStore);

since you call the parent constructor afterwards.

Cheers
Chris

On 19.06.2018 13:00, Jakob Miksch wrote:
> Thanks for the hints.
>
> It would be nice to combine the examples
> (https://geoext.github.io/geoext3/) into a "HelloGeoExt" application.
> This  would make it much easier to learn GeoExt. I would be happy if
> my app could be the basis for it.
>
> I already can access the map from my OverviewMap. See this file:
> https://github.com/JakobMiksch/HelloGeoExt/blob/master/app/view/main/OverviewMap.js
>
> If I try something similar with the LayerTree I receive errors like
> "TypeError: viewConfig is undefined". Here is the code:
> https://gist.github.com/JakobMiksch/b68276dd52bee8330ff5ab71fa238475
>
> Could you tell why this approach works for the OverviewMap but not for
> the LayerTree ?
>
> Thanks and best regards,
> Jakob
>
> Am 18.06.2018 um 16:19 schrieb Christian Mayer:
>>
>>
>> On 15.06.2018 15:06, Jakob Miksch wrote:
>>> Thanks for the link. I am actually getting started with Ext JS and
>>> GeoExt at the same time. (maybe this is a bad idea ... ).
>>> Understanding the BasiGX components is still a bit unclear to me.
>>> And the web apps I mentioned earlier are very complex and hence also
>>> hard to understand.
>>>
>>> The examples on http://geoext.org/ are nice and easy to understand,
>>> but I find it challenging to convert the single file into the proper
>>> folder structure of Ext.
>>
>> you are right, that there are not so many example apps available,
>> which use the MVC / MVVM pattern. Most of the examples are simple
>> single-file demo-apps (like on the GeoExt website). Maybe a simple
>> MVC / MVVM app would be cool and we had that for previous GeoExt
>> versions:
>>
>> https://github.com/geoext/geoext2/tree/master/examples/app/simple
>>
>> https://github.com/geoext/geoext2/tree/master/examples/app-mvvm
>>
>>
>>>
>>> At the moment I am trying to build a pretty standard web mapping
>>> application with a main map, an overview map and a layer switcher.
>>> The overview map works, but I struggle to build the layer switcher,
>>> because I do not figure out how to access the layers from map. This
>>> is what I did so far: https://github.com/JakobMiksch/HelloGeoExt
>>
>> Maybe we can use your "HelloWorld" app as example reference for MVC /
>> MVVM app setup.
>>
>>>
>>> Not sure if this is a general Ext question:
>>> But what is the "best practice" way to exchange the map and its
>>> layers between the different components?
>>
>>
>> You can pass in the map or better a MapComponent, like
>> https://github.com/JakobMiksch/HelloGeoExt/blob/master/app/view/main/Map.js,
>> as config property of your own component. ExtJS will handle it like a
>> member variable in your instance.
>> If that is not possible for your whatever reason you can query
>> arbitrary component instances with Ext.ComponentQuery.query
>> (https://geoext.github.io/geoext3/master/docs-w-ext/#!/api/Ext.ComponentQuery).
>> So a
>>
>> Ext.ComponentQuery.query('mappanel')
>>
>> might be a helpful command. Even I like it more to pass over
>> dependencies as config.
>>
>> Cheers
>> Chris
>>
>>>
>>> Is there any rather simple GeoExt based app that I could use a template?
>>>
>>> Cheers and have a nice weekend,
>>> Jakob
>>>
>>> Am 13.06.2018 um 10:30 schrieb Seth G:
>>>> Hi Jakob,
>>>>
>>>> https://github.com/terrestris/BasiGX has a good collcetion of tools and utilities. 
>>>>
>>>> Seth
>>>>
>>>> --
>>>> web:http://geographika.co.uk
>>>> twitter: @geographika
>>>>
>>>> On Wed, Jun 13, 2018, at 9:39 AM, Jakob Miksch wrote:
>>>>> Dear list,
>>>>>
>>>>> I am getting into Ext and GeoExt and I am looking for examples where I 
>>>>> could learn from. I already found these:
>>>>>
>>>>> https://github.com/terrestris/shogun2-client
>>>>> https://github.com/OpenBfS/gis-client
>>>>>
>>>>> and of course the tutorials:
>>>>> https://github.com/geoext/geoext3-ws
>>>>> https://github.com/geoext/geoext3/blob/master/universal-app.md
>>>>>
>>>>> Could you point me to any other existing projects with GeoExt?
>>>>>
>>>>> kind regards,
>>>>> Jakob
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>>>
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>>
>>
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>
> -- 
> *Jakob Miksch* | *Researcher*
> University of Salzburg | Department of Geoinformatics - Z_GIS
> Schillerstrasse 30 | 5020 Salzburg, Austria
> Phone: +43 (0)662 8044 7529
> E-mail: jakob.miksch at sbg.ac.at <mailto:jakob.miksch at sbg.ac.at> |
> http://www.zgis.at
>
>
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