[Users] Examples of GeoExt

[Jakob Miksch]

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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