[sldev] Re: What does GTK do in the Linux viewer

[卡库拉迪]

Object-C? We're not dealing with Mac OS here, GTK is based on plain C and
GLib object system. And Qt needs a special pre-processor...

Although my preference of GTK over Qt is also a religious thing (especially
considering I've coded with neither) too.

Geneko

On Tue, Dec 23, 2008 at 3:22 PM, Glen <gcanaday at gmail.com> wrote:

>
> I prefer QT to GTK because I'm none too fond of obj-C. That's a religious
> thing, tho.
>
> Why not improve the input handling in SDL?
>
> And ahhh, I didn't know LL were taking the code elsewhere. No, I am not
> planning to nor do I have any wish to use anything other than the standard
> LL-coded viewer. Maintaining version compatibility with a moving target is a
> nightmare and I won't attempt it. I've done it before, and I have to say
> that I absolutely refuse to ever fork another large OSS project ever again
> ;P Patches against LL code yes, separate and soon to be incompatible code
> branch that is likely to undo bug fixes I code, no. Oh my, no.
>
> --GC
>
> Alissa Sabre wrote:
>
>> Glen:
>>
>>> what is gtk actually used for in the Linux version
>>> of the viewer?
>>>
>>
>> Tofu:
>>
>>> Right now, file dialogs, color-picker, warning dialogs,
>>> mozilla+gstreamer event queues, and copy-and-paste.
>>>
>>
>> Three things on the point.
>>
>> (1) Yes, there is a GTK-based color picker, but is is not usually
>> used.  The default behaviour in today's viewer is to use LLUI-based
>> SL's own color picker.  "Edit > Preferences > General > Use default
>> system color picker" controls it.  I guess you can simply disable the
>> GTK-based color picker.
>>
>> (2) I believe clipbard operations are currently handled through Xlib
>> and GTK is not used for the purpose.  See VWR-7036.  Note that the
>> code that Tofu referred to as "The rewritten clipboard code by Alissa
>> Sabre" in his comment on VWR-7036 *is* based on GTK...
>>
>> (3) The warning dialog (OSMessageBox) is currently based on GTK, and
>> it is not straightforward to replace with LLUI, because OSMessageBox()
>> may be called before OpenGL initialization (to notify some unexpected
>> events, e.g., lack of some critical feature in the underlying OpenGL
>> implementation...)
>>
>>  But gtk is GPLd like the viewer is - so it would be OK to port those
>>> widgets into SL's codebase and use SL's UI engine to draw them.
>>>
>>
>> If you are planning to create your own viewer distribution, that's
>> fine.  However, I believe LL would never receive your patch if you put
>> copies of GTK codes into the patch, because LL is selling the viewer
>> source to third parties under no GPL terms, and _importing_ external
>> GPL/LGPL codes into the viewer source will prevent LL from doing so.
>>
>>  Though, if it were to be done, would it be a welcome thing?
>>>
>>
>> Some people welcomes it, and some other doesn't.  You are free to do
>> so if you believe it is good.  Nobody can stop you.  That's the great
>> feature of free software.  Programming freedom.  (Is RMS reading this? :-)
>>
>> My own opinion is just opposite.  I've been trying to remove SDL
>> dependency from the viewer code, replacing it with a GTK-based
>> alternative.  In other words, I'm _increasing_ GTK dependency.  The
>> original reason I started it is to improve the input method handling.
>> Clipboard improvement is just a (good) side effect.  See VWR-2261 for
>> details on this issue.
>>
>>    Alissa Sabre
>>
>> P.S., I recently restarted working on VWR-2261 (after 1/2 year blank),
>> and I'm uploading a revised patch soon, hopefully within this weekend.
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