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[Pnet-developers] Embedding X applications in Xsharp
From: |
Rhys Weatherley |
Subject: |
[Pnet-developers] Embedding X applications in Xsharp |
Date: |
Sat, 01 Nov 2003 11:29:16 +1000 |
User-agent: |
KMail/1.4.3 |
Hi all!
I've been playing around with the XC-APPGROUP extension under X, using it to
implement a kind of plugin mechanism for Xsharp.
It is now possible to embed any X application as a child widget within an
Xsharp application. The pnetlib CVS tree includes "XClockEmbed.cs" as an
example of doing this for "xclock", and the following screen shot shows both
"gedit" (a GNOME app) and "kcalc" (a KDE app) running as two children of the
same Xsharp main window:
http://www.southern-storm.com.au/download/dual-embed.png
Why is this interesting? Well, the next version of WinForms will have a HTML
web browser control widget, and I'm investigating how we could embed third
party open source Web browsers to get the browser functionality essentially
"for free" (a few quirky issues to deal with, but easier than writing a Web
browser from scratch in C#).
There is one caveat though: ssh login accounts. The sshd daemon doesn't know
how to properly proxy XC-APPGROUP authentication tokens, and so it is
necessary to create a "back channel" to the X server to bypass sshd. If
you're using VMWare, then you might be using ssh without even realising it,
so the following instructions apply to VMWare also.
Xsharp uses the SSH_CLIENT environment variable to discover where to connect
to on the back channel. However, some older versions of bash do not properly
export this variable, so you may need to do "export SSH_CLIENT" manually.
You may also need to use "xhost +" on the machine running the X server.
Xsharp will attempt to give you advice as to what is going wrong with the
embedding system if it cannot connect. The code that does this is in the
"CanEmbed" method in "EmbeddedApplication.cs". E-mail the list if you're
having problems.
Cheers,
Rhys.
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