[katello-devel] T²-Pain generator

[Petr Chalupa]

Sorry I was too vague. I meant to create a helper class (TwoPane) where 
its instance would directly render the TwoPane html code not the Ruby 
code. I would use a class because this too complex to be done just with 
simple helper methods.

I do not really know how to describe it so I try an example:

module TwoPaneHelper

   def twopane(options, &block)
     TwoPane.new(self, options, &block).render
   end

   class TwoPane
     attr_reader :template, :options
     def initialize(template, options = { }, &block)
       @template, @options = template, options
       # eval block whit dsl for complex options
       instance_eval &block
     end

     # dsl example method
     def ajax(options = { })
       self.options[:ajax_load]   = options[:load] || 'a default'
       self.options[:ajax_scroll] = options[:scroll] || 'a default'
     end

     def left_side(options)
       # ...
     end

     def render
       # stuff like
       template.content_tag :div
       template.render :partial => 'some template', :locals => options
     end
   end

end

# usage in template
include TwoPaneHelper
twopane(:title => 'A Title') do
   ajax :load => 'whatever', :scroll => 'whatever'
   left_side do
     # some more configuration
   end
end


In case of two-pane I guess there would be a few classes (left, right 
side etc.) which could be overridden and interchanged if needed.

If I failed to make it more understandable please ask.

Petr

On 15.11.12 14:32, David Davis wrote:
> Do you have an example? I'm not sure I've ever seen Ruby source code generated with Ruby objects and meta-programming.
>
> One reason I prefer to use Rails generators is that I could tie into existing generators. Using Rails generators, I could reuse the existing generators for routes, models, migrations, etc. I could that with Ruby objects or some meta-programming but it wouldn't be as easy as calling hook_for or invoke from a new Rails generator.
>
> David
>
> ----- Original Message -----
>> From: "Petr Chalupa" <pchalupa at redhat.com>
>> To: katello-devel at redhat.com
>> Sent: Thursday, November 15, 2012 8:17:36 AM
>> Subject: Re: [katello-devel] T²-Pain  generator
>>
>> Hi,
>>
>> I this case I would suggest not to use Rails generator. I would use
>> pure
>> Ruby objects and some meta-programing.
>>
>> My Reason: Once code for tupane is generated and specific changes are
>> introduces into the generated code it is hard to keep the code
>> up-to-date with generator as the generator is being updated and
>> improved. Also erb files for generating Ruby tend to look horrible
>> and
>> unintelligible.
>>
>> Petr
>>
>> On 14.11.12 14:47, David Davis wrote:
>>> Not sure if I understand your question but the rails generator will
>>> generate a bunch of code for your when you call it. I haven't
>>> looked at the tupane code a lot yet but if there is a lot of
>>> javascript, we might be able to generate it. Basically, we'd be
>>> building on top of the "rails generate scaffold" command to
>>> generate a tupane layout instead of the typical Rails
>>> index/create/edit/show views.
>>>
>>> Here's more information:
>>>
>>> https://fedorahosted.org/katello/wiki/RailsGeneratorDesign
>>>
>>> David
>>>
>>> ----- Original Message -----
>>>> From: "Lukas Zapletal" <lzap at redhat.com>
>>>> To: katello-devel at redhat.com
>>>> Sent: Wednesday, November 14, 2012 8:40:41 AM
>>>> Subject: Re: [katello-devel] T²-Pain  generator
>>>>
>>>> Does that Rails Generator thing bring less JavaScript and more
>>>> Ruby?
>>>>
>>>> I mean, writing more code in Ruby and having most of the
>>>> JavaScript
>>>> stuff generated?
>>>>
>>>> Or is it something different?
>>>>
>>>> LZ
>>>>
>>>> On Wed, Nov 14, 2012 at 08:18:01AM -0500, David Davis wrote:
>>>>> So I'm working on some Rails generators and one of them is a
>>>>> T²-Pain generator. Originally we wanted to call it 2pane but I
>>>>> have found out that it won't work as module/class names in Ruby
>>>>> can't start with a number and you have to a module/class for the
>>>>> generator. Thus, I'm wondering which version of tUpay'n I should
>>>>> use.
>>>>>
>>>>> - tupane
>>>>> - twopane
>>>>> - two_pane
>>>>>
>>>>> My concern with the first one is that it's not self evident what
>>>>> it's referring to. Also, are there any other names that might
>>>>> work
>>>>> other than tu/two/2pane?
>>>>>
>>>>> Thanks.
>>>>>
>>>>> David
>>>>>
>>>>> _______________________________________________
>>>>> katello-devel mailing list
>>>>> katello-devel at redhat.com
>>>>> https://www.redhat.com/mailman/listinfo/katello-devel
>>>>
>>>> --
>>>> Later,
>>>>
>>>>    Lukas "lzap" Zapletal
>>>>    #katello #systemengine
>>>>
>>>> _______________________________________________
>>>> katello-devel mailing list
>>>> katello-devel at redhat.com
>>>> https://www.redhat.com/mailman/listinfo/katello-devel
>>>>
>>>
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>>
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