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 Desktop Environment
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Some useful text commands to work on graphical interfaces.

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Xorg
====

Resizing windows
----------------

Resize all of the windows from ``$PROGRAM`` to 800x600::

   xdotool search --name $PROGRAM windowsize %@ 800 600

Resize the active window to 800x600::

   xdotool getactivewindow windowsize 800 600


Clipboard
---------

Get the contents of the X selection on stdout::

   xclip -o

Copy clipboard contents (e.g. from ctrl-C in a graphical program) to the
primary (which can be basted with a middle mouse click)::

   xclip -o -selection clipboard | xclip -i

Screenshots
===========

With ImageMagick
----------------

The default behaviour of import is to take a custom rectangular portion
of the screen; just launch::

   import $FILENAME

and drag the cursor to select the area you are interested into.

To get a screenshot of the full screen (the root window)::

   import -window root $FILENAME

To get a screenshot of one specific window::

   import -window `xwininfo | awk '/.*Window id:.*/ {print $4}'` $FILENAME

and then click on the window you are interested in; to also include the
window borders the command is::

   import -border -window `xwininfo | awk '/.*Window id:.*/ {print $4}'` \
   $FILENAME

To take a screenshot of a running screensaver, login remotely to the
computer e.g. via ssh, with the same user that is running the X session,
and then::

   DISPLAY=:0 import -window root $FILENAME

XDG
===

Set MIME associations and default apps
--------------------------------------

``xdg-settings`` is used to set some deskoppish properties and
expecially the default web browser::

   xdg-settings set default-web-browser xombrero.desktop

other associations can be set using ``xdg-mime``::

   xdg-mime default apvlv.desktop application/pdf

of course the ``.desktop`` can be any available file for any app, placed
in one of the standard directories, either system-wide or per-user.

Both write to ``~/.local/share/applications/mimeapps.list``.

See Also
========

* `The old version of this article on my old website
  <https://www.trueelena.org/computers/howto/managing_x_from_the_command_line.html>`_
* `Another article from my old website that has been added here
  <https://www.trueelena.org/computers/howto/screenshots_with_imagemagick.html>`_

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