.. -*- coding: utf-8 -*-

====

 X.

====

.. contents::

Standard.

=========

See

  http://www.tronche.com/gui/x/icccm/

Widget toolkit.

===============

  http://en.wikipedia.org/wiki/Widget_toolkit

                Widget toolkit

  http://en.wikipedia.org/wiki/List_of_widget_toolkits

                List of widget toolkits

GTK+.

-----

  http://en.wikipedia.org/wiki/GTK%2B

QT.

---

  http://en.wikipedia.org/wiki/Qt_%28toolkit%29

WxWidgets.

----------

  http://en.wikipedia.org/wiki/WxWidgets

Tk.

---

  http://en.wikipedia.org/wiki/Tk_%28computing%29

FLTK.

-----

  http://en.wikipedia.org/wiki/FLTK

Xaw.

----

  http://en.wikipedia.org/wiki/Xaw

GNUstep.

--------

  http://en.wikipedia.org/wiki/GNUstep

XView.

------

  http://en.wikipedia.org/wiki/XView

Getting info about X window and X-related applications data.

============================================================

Look for system registered resources::

  $ listres

  $ listres -all

  $ appres XTerm

  $ appres -name htop   # for xterm with running bash inside

Look for X resources of running applications::

  $ xprop -root

  $ xprop -name bash    # for xterm with running bash inside

Find the keycode.

=================

::

  $ xev

  $ cat /usr/include/X11/keysymdef.h

Making screenshort.

===================

::

  $ sudo apt-get install scrot

  $ scrot -d <sec> <file>

or::

  $ sudo apt-get install imagemagic

  $ import -quality 100 -pause <sec> -silent <file>

Input method.

=============

Input method by setxkbmap.

--------------------------

::

  $ setxkbmap ru

  $ setxkbmap -rules xorg -model pc104 -layout "us,ru" -option "grp:rwin_toggle,grp_led:scroll" -variant ",winkeys"

Input method from xorg.conf.

----------------------------

::

  Section "InputDevice"

      Identifier     "Keyboard0"

      Driver         "kbd"

      Option         "XkbModel" "pc105"

      Option         "XkbLayout" "us,ru"

      Option         "XkbVariant" ",winkeys"

      Option         "XkbOptions" "grp:rwin_switch,grp_led:scroll"

  EndSection

.Xdefaults

==========

The syntax of an Xdefaults file is as follows::

  [client. | *][{restriction.} | *]resource: value

where:

  client

                The name of the application, some program allow change it by

                '-name' option. This element is optional (can be substituated

                with wildcard).

  restriction

                Class names or name of specific class instance. The classes

                names conventionally start with an upper-case letter.

  resource

                The name of the resource whose value is to be changed.

                Resources are typically lowercase with uppercase

                concatenation.

  value

                The actual value of the resource.

  delimiters

                A period (.) is used to signify each step down into the

                hierarchy. A colon (:) is used to separate the resource

                declaration from the actual value.

Comment start with '!' char and goes up to end of line or C-like ``/* */``.

Use xprop utility to find classes and resources used by application.

To reread your .Xresources file, and throw away your old resources::

  $ xrdb ~/.Xdefaults

To reread your .Xresources file, and keep your old resources::

 $ xrdb -merge ~/.Xdefaults

Example::

  *foreground: yellow

  XClock*foreground: pink

  Xman*topBox*foreground: blue

String value type.

------------------

This can be path specification like '/usr/bin/firefox'.

Colors value type.

------------------

For color names see '/usr/lib/X11/rgb.txt'. Also you can use hex

representation #ffffff.

Font value type.

----------------

You can use either a full name, a wildcarded specification, or a font alias::

  XTerm*Font: -adobe-courier-bold-r-normal--14-140-75-75-m-90-iso8859-1

  XTerm*Font: *courier-bold-r*140*

  XTerm*Font: 7x14

Geometry value type.

--------------------

  XCalc*geometry: 120x120-0-0

  XClock*geometry: -50+100

Cursor names value type.

------------------------

Cursor resources require the name of the file in /usr/include/X11/bitmaps that

contains the cursor you want to use.

  ScoTerm*pointerShape: gumby

Pixmaps value type.

-------------------

Pixmaps are patterns, like bitmaps, that are used to texture or color an area

on your display. Pixmap resources are specified like cursors or bitmaps.

Numebers value type.

--------------------

  XLogo*borderWidth: 10

Boolean value type.

-------------------

Some resources require a boolean value, such as 'true' or 'false', 'yes' or

'no', or 'on' or 'off'.

Wildcard matching.

------------------

The asterisk can be used as a wildcard, making it easy to write a single rule

that can be applied to many different applications or elements.