[Lazarus] External/out-of-tree LCL widgetset

[Kostas Michalopoulos]

@Stephane:
@Sven:
I know about fpGUI (Sven i assume you mean that), but i am already working
on a widget toolkit for a few years now which is written in C and if i'm
going to work on a custom widgetset might as well make it target the one
i'm already working on which is used by some other stuff i am doing to keep
things consistent.

Also AFAIK fpGUI doesn't use the native window system beyond the toplevel
windows, which i think would make OpenGL support and interfacing with
external stuff (e.g. calling an external library where you pass a HWND/X11
Window directly) harder.

As i said, i do not think this would be useful enough to others to be part
of the Lazarus tree. I ask because i remember a few months ago someone
having an Amiga widgetset pretty much in working condition and that was
something he worked on for a while, so i wondered if there was some
mechanism for that. I suppose just having a big patch would also work,
although it is kind of inconvenient.

@Martin:
AFAIK MSEgui doesn't have an LCL widgetset. Most of my code is LCL specific
and my concern is to keep using that code. If i am to rewrite it, might as
well rewrite it in C.


On Sun, Nov 26, 2017 at 6:13 PM, Sven Barth via Lazarus <
lazarus at lists.lazarus-ide.org> wrote:

> Am 26.11.2017 14:23 schrieb "Kostas Michalopoulos via Lazarus" <
> lazarus at lists.lazarus-ide.org>:
>
> Is there a way to have an LCL widgetset outside of the Lazarus tree? I'm
> considering writing one for my Little Forms C toolkit at some point but i
> don't think it would be very useful to others so i don't think there is
> much of a value in having it as part of the Lazarus codebase (and TBH i
> cannot guarantee i wont abandon it). Even better if it is possible for it
> to exist as a package.
>
> My main motivation is wanting to get away from the modern madness of
> GTK3+/Qt5+/Wayland and all that stuff and their dependencies but i'd rather
> not rewrite in C all the tools and library code i wrote in Lazarus, so a
> custom widgetset that relies only on Little Forms (which itself makes an
> effort to rely only on libX11 with an optional Xft dependency) sounds ideal.
>
> However i'm not sure how extensible the LCL widgetset backend is and from
> a quick look it seems like there is a ton of manual work just to introduce
> a new one. Am i missing something?
>
> Worst case, i'll maintain it as a patchset that needs to be updated with
> the main code, but i'd rather not if there is a cleaner way (or can be
> easily introduced, after all this isn't something i need immediately :-P
> and i think there is value on this being a standard feature).
>
>
>
> Lazarus already contains a custom drawn widgetset that supports X11. I
> don't know its current state, but maybe it would be best to bring that up
> to speed and form instead of starting a new one.
>
> Regards,
> Sven
>
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