X Windows Documentation

I am planning to develop a couple of small applications using X on Ubuntu 10.4. Does anyone know where I might find any documentation on 开发者_运维技巧the subject, including the widget set Ubuntu uses (I'm used to Motif, and they don't look like Motif widgets to me)?

Also, does anyone know where I might find some tools to help out with this (something along the lines of X Designer)?

Alternatively, if you consider X to be on a par with cave-painting, could you suggest any other possibilities?

(I don't have the excellent O'Reilly series to hand, sadly).

You could use Motif if you want. I think the lesstif-dev package would be what you're looking for, but that would look pretty alien on Ubuntu.

The widget set used in Ubuntu is GTK (specifically, GTK2). There are a couple of UI designers around, such as Glade.

http://www.gtk.org/ http://glade.gnome.org/

You could also use Qt, which comes with Qt Designer (or Qt Creator). Qt applications use GTK themes, so look nearly (but not quite) the same as GTK applications.

http://qt.nokia.com/

Look for KDevelop and friends. Doing direct X calls might prove to be unsustainable, as the X api might change. By using either GTk or KDE/QT you add an extra "safety" net