Hello Martin,

made pull request #608 to wicket 7 branch. Hope it's all done as required.

Did not rename till now, hope it is still possible. Just wanted to give
you a view.

AJAX is not working yet, have a look at example, bar chart, AjaxCheckBox
for stacked percent.

Cheers
Dieter

Am 16.08.2017 um 14:06 schrieb Martin Grigorov:
> Hi Dieter.
> 
> On Wed, Aug 16, 2017 at 12:53 PM, Dieter Tremel <tre...@tremel-computer.de>
> wrote:
> 
>> Hi Martin,
>>
>> Google Chart is versioned
>> (https://developers.google.com/chart/interactive/docs/
>> release_notes#Releases)
>> but only in newer "frozen versions", 41 .. 45. 45 is current. Not ideal
>> for naming, since Google does not emphasize versioning at all.
>>
>> Perhaps we can create a name from "image vs. loader" based or "image vs
>> SVG/VML" based. googlecharts-parent is based on the deprecated image
>> api: https://developers.google.com/chart/image/ The current API is based
>> on function from a loaded library:
>> https://developers.google.com/chart/interactive/docs/basic_load_libs.
>> Please make a suggestion.
>>
>> My library (currently named gchart-parent) has been improved since my
>> first post:
>>  - better package structure
>>  - implemented OptionBuilder with fluent interface
>>  - make ChartOptions and JsonStringer model-aware, so values in options
>> can be IModel
>>  - offer ChartLibLoaderBehavior for Page to avoid double library loading
>> on pages with multiple charts by use of HeaderItem#getDependencies
>>  - more examples, new examples analog to Google's examples
>>  - tried to make chart redrawable by AJAX, but this is not finished, I
>> have problems calling the draw callbacks when adding to target. Here I
>> need some help. Should I write a post to us...@wicket.apache.org?
>>
>> I will prepare a pull request, but before I have to check:
>>  - find name (see above)
>>
> 
> I think the best would be to rename the old to
> wicketstuff-google-image-charts and use wicketstuff-google-charts for the
> new one.
> Second option is to use wicketstuff-google-charts-loader for the new one.
> 
> 
>>  - learn maven toolchain definition
>>
> 
> All you need is $HOME/.m2/toolchains.xml with content like [1]. Just fix
> the paths to match you local environment. You can remove entries for old
> JDKs.
> 
> 
>>  - learn again how to make a neat pull request
>>
> 
> Fork the repo, make changes, create PR
> 
> 
>>  - fix AJAX issue
>>  - should I include my local git history in request or start with a
>> clean history?
>>
> 
> This won't be easy!
> But if you are able to merge your code in the forked WicketStuff repo and
> preserve the history then do it.
> It is not something really important though!
> 
> 
>>  - I mixed some lambda expressions and stream use with some traditional
>> for loops. How should this be unified? Java 8 or not?
>>
> 
> Java 8 code could be used only in WicketStuff master branch, i.e. Wicket
> 8.x.
> If this is OK for you then everything is OK.
> If you want to contribute it to wicket-7.x branch then it should be
> compileable with Java 7.
> 
> 
>>
>> Thank you for your help
>> Dieter
>>
>>
> 1.
> cat ~/.m2/toolchains.xml
> <?xml version="1.0" encoding="UTF8"?>
> <toolchains>
>   <toolchain>
>     <type>jdk</type>
>     <provides>
>       <version>1.6</version>
>       <vendor>oracle</vendor>
>     </provides>
>     <configuration>
>       <jdkHome>/home/martin/devel/java-6/</jdkHome>
>     </configuration>
>   </toolchain>
>   <toolchain>
>     <type>jdk</type>
>     <provides>
>       <version>1.7</version>
>       <vendor>oracle</vendor>
>     </provides>
>     <configuration>
>       <jdkHome>/home/martin/devel/java-7/</jdkHome>
>     </configuration>
>   </toolchain>
>   <toolchain>
>     <type>jdk</type>
>     <provides>
>       <version>1.8</version>
>       <vendor>oracle</vendor>
>     </provides>
>     <configuration>
>       <jdkHome>/home/martin/devel/java-8/</jdkHome>
>     </configuration>
>   </toolchain>
>   <toolchain>
>     <type>jdk</type>
>     <provides>
>       <version>1.9</version>
>       <vendor>oracle</vendor>
>     </provides>
>     <configuration>
>       <jdkHome>/home/martin/devel/java-9/</jdkHome>
>     </configuration>
>   </toolchain>
>  </toolchains>⏎
> 
> 
> 
>> Am 13.08.2017 um 12:56 schrieb Martin Grigorov:
>>> Hi Dieter,
>>>
>>> Are Google Charts versioned ?
>>> Maybe we can add your library as wicketstuff-google-charts2, or whatever
>> is
>>> the correct version. As we did with Google Maps APIs.
>>>
>>> Please create a Pull Request!
>>> Thank you!
>>>
>>> Martin Grigorov
>>> Wicket Training and Consulting
>>> https://twitter.com/mtgrigorov
>>>
>>> On Mon, Aug 7, 2017 at 10:36 AM, Dieter Tremel <
>> tre...@tremel-computer.de>
>>> wrote:
>>>
>>>> Hello wicket-team,
>>>>
>>>> for a project visualizing metar weather data I used wicket-charts based
>>>> on Highcharts in a former version
>>>> (http://tremel-computer.no-ip.org:8080/metarstation/). Due to licensing
>>>> of Highcharts I decided to move to Google charts, but found the
>>>> implementation in wicketstuf outdated, since it depends on the image
>>>> chart API, which is deprecated since 2012.
>>>>
>>>> So I wrote a Google Charts component based on the actual API. I am
>>>> pleased with it, perhaps it could be helpful for other developers, so
>>>> I'd like to give it to wicketstuff.
>>>>
>>>> It is rather lightweight, just enough Java to render the necessary
>>>> JavaScript to the page header without knowledge of JavaScript. Knowledge
>>>> of the Google API is needed to use it, it does not hide anything of the
>>>> API, it should be quite feature complete. It is based at many points on
>>>> org.apache.wicket.ajax.json and allows the user to build Java-Objects
>>>> from compact JSON-Strings too, for example look at the essential class
>>>> ChartOptions. Most of the classes are easy to understand with knowledge
>>>> of the Google Charts API, since they are counterparts of the structure
>>>> there. Only OptionHelper as container for convenience methods is a bit
>>>> clumsy, but I have a different solution as a builder with a fluent
>>>> interface in mind. gchart is actually used in a new branch of my weather
>>>> app and does it's job there well.
>>>>
>>>> Perhaps you can have a look at it, if you like it, we can integrate it
>>>> in wicketstuff. The ZIP in the attachment has already the structure with
>>>> parent, lib and examples. I tried to write useful JavaDoc and some basic
>>>> unit tests. The example is a quickstart giving two charts on one page,
>>>> first one simple like Googles's Getting Started, the other more complex
>>>> with a overview how to use the lib's features.
>>>>
>>>> Three issues (see TODO lines integrated in the source) are existing, but
>>>> two are small, not blocking. The essential one is if the rendering of
>>>> JavaScript in Chart#renderHead(final IHeaderResponse response) is
>>>> sufficient for refreshing the chart by AJAX, I am not sure if. You can
>>>> decide this in a second, I believe, and give me some hints to make the
>>>> chart AJAX ready.
>>>>
>>>> I first wrote to Martin Grigorov since he helped me long ago to
>>>> contribute a bit to wicketstuff. He told me he is on vacation and I
>>>> should repeat the mail to the list.
>>>>
>>>> Dieter Tremel

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