Add an X11 user interface

This is meant to exactly mimic the terminal UI, just without
the restriction to ugly monospace fonts.

The Curses implementation has been reworked, and may have become
more computationally expensive.  In general, though, the codebase
has been significantly cleaned up.

1 files changed, 23 insertions, 16 deletions

diff --git a/README.adoc b/README.adoc
index 1ca0917..e772b1b 100644
--- a/README.adoc
+++ b/README.adoc
@@ -1,24 +1,27 @@
 nncmpp
 ======
 
-'nncmpp' is yet another MPD client.  It is in effect a simplified TUI version
-of Sonata.  I had already written a lot of the required code before, so I had
-the perfect opportunity to get rid of the unmaintained Python application and
-make the first TUI client that doesn't feel awkward to use.
+'nncmpp' is yet another MPD client.  Its specialty is running equally well in
+the terminal, or as an X11 client--it will provide the same keyboard- and
+mouse-friendly interface.
+
+This project began its life as a simplified TUI version of Sonata.  I had
+already written a lot of the required code before, so I had the perfect
+opportunity to get rid of the unmaintained Python application, and to make
+the first TUI client that doesn't feel awkward to use.
 
 If it's not obvious enough, the name is a pun on all those ridiculous client
 names, and should be pronounced as "nincompoop".
 
 Features
 --------
-Most stuff is there.  Enough for me to use the program exclusively.  Among other
-things, it can display and change PulseAudio volume directly to cover the use
-case of remote control, it has a fast spectrum visualiser, and both
-the appearance and key bindings can be customized.
+Most stuff is there.  I've been using the program exclusively for many years.
+Among other things, it can display and change PulseAudio volume directly
+to cover the use case of remote control, it has a fast spectrum visualiser,
+and both its appearance and key bindings can be customized.
 
-Note that since I only use the filesystem browsing mode, that's also the only
-thing I care to implement for the time being.  Similarly, the search feature is
-known to be clumsy.
+Note that currently only the filesystem browsing mode is implemented,
+and the search feature is known to be clumsy.
 
 image::nncmpp.png[align="center"]
 
@@ -38,6 +41,7 @@ Build dependencies: CMake, pkg-config, asciidoctor,
                     liberty (included), termo (included) +
 Runtime dependencies: ncursesw, libunistring, cURL,
                       fftw3 (optional), libpulse (optional)
+Optional X11 dependencies: x11, xkbcommon, xft
 
  $ git clone --recursive https://git.janouch.name/p/nncmpp.git
  $ mkdir nncmpp/build
@@ -54,16 +58,19 @@ Or you can try telling CMake to make a package for you.  For Debian it is:
  $ cpack -G DEB
  # dpkg -i nncmpp-*.deb
 
-Terminal caveats
-----------------
-This application aspires to be as close to a GUI as possible.  It expects you
-to use the mouse (though it's not required).  Terminals are, however, somewhat
-tricky to get consistent results on, so be aware of the following:
+User interface caveats
+----------------------
+The ncurses interface aspires to be as close to a GUI as possible.  Don't shy
+away from using your mouse (though keyboard is also fine).  Terminals are,
+however, tricky to get consistent results on, so be aware of the following:
 
  - use a UTF-8 locale to get finer resolution progress bars and scrollbars
  - Xterm needs `XTerm*metaSendsEscape: true` for the default bindings to work
  - urxvt's 'vtwheel' plugin sabotages scrolling
 
+The X11 graphical interface is a second-class citizen, so some limitations of
+terminals carry over, such as the plain default theme.
+
 Contributing and Support
 ------------------------
 Use https://git.janouch.name/p/nncmpp to report any bugs, request features,