Hello. This is Jaehyun Cho.
This email is to discuss and share opinions about current issues on EFL
C# language bindings and how to solve the issues.
Originally I asked questions about EFL C# language bindings to Mr.
Felipe Magno de Almeida, but anyone can answer or share your opinions.
Please give your opinions if you may concern.
Thank you.
Best Regards,
Jaehyun Cho.
--------- Original Message ---------
Sender : Xavier
Artigas <x.arti...@partner.samsung.com> Contractor/SRA-Open Source/
Date : 2018-07-23 18:19 (GMT+9)
Title : RE: Re(16) : Some questions on this year's project
Hi Jaehyun,
By the way, could we move this discussion to the public EFL mailing
list? in this way more people could share their insights.
I am already adding Marcel Hollerbach in the CC.
Xavi
--------- Original Message ---------
Sender : Xavier
Artigas <x.arti...@partner.samsung.com> Contractor/SRA-Open Source/
Date : 2018-07-23 15:38 (GMT+9)
Title : RE: Re(16) : Some questions on this year's project
Hi Jaehyun,
Thanks for including me in this discussion, I am also very interested
in Felipe's answers.
I can only answer in regard to 3 (What if multi class inheritance is
not allowed in eo). Current eo files already contain 38 mixins. I could
study how much work it would be to remove them, but I don't think it
will be easy.
Xavi
--------- Original Message ---------
Sender : Jaehyun Cho <jae_hyun....@samsung.com> Engineer/Tizen Platform
Lab./Samsung Electronics
Date : 2018-07-19 14:37 (GMT+2)
Title : Re(16) : Some questions on this year's project
To : null<fel...@expertisesolutions.com.br>, Jaehyun
Cho<jae_hyun....@samsung.com>
CC : woohyun jung<wh0705.j...@samsung.com>, JONGMIN
LEE<jm105....@samsung.com>, Myoung-Woon Roy
Kim<myoungwoon....@samsung.com>, Hermet Park<chuneon.p...@samsung.com>,
Xavier Artigas<x.arti...@partner.samsung.com>
Dear Felipe Magno de Almeida,
Hello. This is Jaehyun Cho.
Thank you for replying.
I have some more questions as follows. Please give us your opinion.
1. About user-defined class inheritance
- I followed your instruction and made an example. Aparently, it looks
ok.
But when I inherit efl.ui.ButtonInherit class, then "ClickedEvt"
cannot be found in the derived class.
class MyButton : efl.ui.ButtonInherit
{
...
}
class Test
{
public static void Main()
{
...
MyButton btn = new MyButton(parent);
btn.ClickedEvt += callback; // This causes error because
ClickedEvt cannot be found in MyButton.
...
}
}
- To use ClickedEvt, the variable needs to be casted to
efl.ui.IButton. I think this is not a correct way..
2. Crash with ClickedEvt callback
- When I register callback function for ClickedEvt, crash happens when
clicked event happens.
(e.g. btn.ClickedEvt += callback;)
3. What if multi class inheritance is not allowed in eo?
- As far as I know, the reason, why efl.ui.IButton exists and there is
no class hierarchy in generated cs files, is because eo allows multi
class inheritance.
What if eo does not allow multi class inheritance?
If so, is it possible to generate class hierarchy in cs files
without efl.ui.IButton and does not need to implement all interface
methods?
(e.g. In efl_ui_button.eo.cs, efl.ui.IButton does not exist and
SetSize() method does not need to be implemented because it is
implemented in efl.ui.Layout.Object.)
4. About class only for inheritance
- You mentioned as follows. Could you explain details why we need to
create new eo class instead of exising widget class (e.g.
efl_ui_button)?
We need one class for inheritance, which effectively creates a new Eo
class in Eo
virtual call mechanism, and another class for the user to call methods
on a Eo class.
- Hermet and I checked that the difference between Button and
ButtonInherit constructor is as follows.
It seems that the new eo class is the same as efl_ui_button class.
What happened if user-defined class inherits efl.ui.Button unless it
is not sealed class?
klass = efl.eo.Globals.register_class(new
efl.eo.Globals.class_initializer(ButtonNativeInherit.class_initializer)
, "Button", efl_ui_button_class_get());
Best Regards,
Jaehyun Cho.
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