[Users] Examples of GeoExt

Tue Jun 19 15:10:15 CEST 2018

Thanks a lot for the helpful tip! Now it works. I updated my project on 
GitHub:
https://github.com/JakobMiksch/HelloGeoExt

Cheers,
Jakob

Am 19.06.2018 um 13:05 schrieb 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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>> -- 
>> *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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-- 
*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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