Re: [E-devel] C API => Unified API

Am 28.06.21 um 22:40 schrieb Cedric Bail:
> 
> 
> On Monday, June 28th, 2021 at 11:47 AM, Andreas Volz <[email protected]> wrote:
>> Am 28.06.21 um 17:52 schrieb Cedric Bail:
>>> On Sunday, June 27th, 2021 at 12:55 PM, Andreas Volz [email protected] wrote:
>>>
> 
>>>> I often don't find a Unified API equivalent in the new Unified API.
>>>> Sure, the easy and obvious ones no problem. But sometimes the design
>>>> seems to be changed a lot. Is there a general advice?
>>>
> 
>>>> For example I use edje_object_part_external_param_*() much in my
>>>> application. I thought it might be an equivalent in Efl.Ui.Layout_Part
>>>> but I don't see an obvious function.
>>>
> 
>>>> So any hints in general or this special case?
>>>
> 
>>> Yes, I think this would be part of the efl_part API. Which should be something
>>> like:
>>> efl::eo::downcastefl::Text(layout.part("title")).text_set("hello");
>>>
> 
>>> or in C:
>>> efl_text_set(efl_part(layout, "title"), "hello");
>>>
> 
>>> The efl_part object returned is an Eo object that can only be used for one call. If
>>> you want to use it for more than that you need to increase its ref counting. Something
>>>
> 
>>> like that:
>>>
> 
>>> Eo *part = efl_ref(efl_part(layout, "title"));
>>> efl_text_set(part, "hello");
>>> ...
>>> efl_unref(part);
>>
> 
>> Hm, I'd assume this works for text objects. But with the external API[1]
>> you could get/set also int/bool data if you know the object supports it
>> without detail information of what UI type is the object. With the C API
>> this is possible.
> 
> With the efl_part, in the case of an external, you should actually get the object
> itself, not some kind of wrapper. You might have to do something like:
>   Eo *obj = efl_content_get(efl_part(layout, "yourpart"));
> 
> I am guessing you will need to do some casting in the C++ API, no idea on
> that part I haven't played with it in a very long time and don't remember
> enough.

I searched my local headers and found a file 
efl_canvas_layout_part_external.eo[1] which defines (nearly) what I 
need. This shows internally the same code as you quoted above. I would 
have found it before but it seems the online docs are not recent. Maybe 
they need to be re-generated?

https://www.enlightenment.org/develop/api/efl/canvas/layout_part_external/property/content
=> This topic does not exist yet

But I still don't know how to set a non-text value on a efl_part. This 
were the reasons those tpes have been used in the old API.

typedef enum _Edje_External_Param_Type
  {
    EDJE_EXTERNAL_PARAM_TYPE_INT,
    EDJE_EXTERNAL_PARAM_TYPE_DOUBLE,
    EDJE_EXTERNAL_PARAM_TYPE_STRING,
    EDJE_EXTERNAL_PARAM_TYPE_BOOL,
    EDJE_EXTERNAL_PARAM_TYPE_CHOICE,
    EDJE_EXTERNAL_PARAM_TYPE_MAX
  } Edje_External_Param_Type;

With this you could put a e.g. spinner in a Layout and assign a INT 
value and it just works. Without knowing what widget type exactly is used.

regards
Andreas

[1] 
https://git.enlightenment.org/core/efl.git/tree/src/lib/edje/efl_canvas_layout_part_external.eo