[fpc-pascal] Xlib Threads
mschnell at lumino.de
Mon Apr 28 09:35:05 CEST 2014
On 04/26/2014 10:07 PM, Graeme Geldenhuys wrote:
> And it just surprises me what features Xlib / X11 has
X11 originally has been designed to work in a client-server way via
TCP-IP. Using a hardware "X-Terminal" and a Unix box without any
graphical hardware. :-)
If in Lazarus, it would be possible to switch to native X11support (via
"CustomDrawn" or via the LCL-variant of "fpGUI") by just switching the
"LCL Widget Type" project option (IMHO sadly now deeply hidden in
"Additions and Overrides") appropriately and a - say - "GTK" project
would simply work as expected after the switch, there would be a great
way to create a small executable for embedded use with a remote GUI.
OTOH the "wrong" client<->server layout of X11 makes "attaching" from a
remote site to such a (already running) project not as easy as it
should. Here "NX" instead of X11 would be a more convenient choice (no
idea how this could be accomplished).
The most convenient "GUI remoteing" choice would be decent support for a
browser based "Web-GUI" (similar to the - now seemingly dead -
"ExtPascal" approach), that emulates the LCL widgets via Java script
code. Here we could have as well embedded devices (with built-in web
server similar to "fp-web") or "CGI" programs behind a web server (via
FCGI or ISAPI) (also similar to "fp-web").
As "CustomDrawn" is more mature, and "WebSockets" (for spontaneous
Host->Browser events) is supported by all Browsers, right now, I suppose
to allow for a rather decent emulation of a real LCL based GUI to be
shown in a Browser. Based on "CustomDrawn" and "fp-web", the appropriate
"LCL Widget Type" seems to be doable.
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