polybar-dwm/doc/user/modules/tray.rst
patrick96 baed54bc76 doc: Improve tray documentation
Unaware users may be confused by why the tray module is not shown in the
default config and if they add it, they may be confused why only one of
their bars shows the module.
2024-08-01 11:09:46 +02:00

119 lines
3.0 KiB
ReStructuredText

.. include:: defs.rst
Tray Module
===========
.. poly-setting:: type = internal/tray
.. versionadded:: 3.7.0
The tray module displays system tray application icons on the bar.
This module is a bit different from the other modules.
The tray icons (also called clients) are individual windows managed by their
respective application (e.g. the Dropbox tray icon is created and managed by
the Dropbox application).
Polybar is only responsible for embedding the windows in the bar and
positioning them correctly.
.. attention::
Only a single instance of this module can be active at the same time (across
all polybar instances in the same graphical session).
The way the `system tray protocol <systray-spec_>`_ works, at most one tray
can exist at any time.
Polybar will produce a warning if additional tray instances are created.
This also applies when another tray application (e.g. ``stalonetray``) is
active.
For transparent background colors, the tray will use pseudo-transparency, true
transparency is not possible for the tray icons.
Formats
-------
The module only has a single format:
.. poly-setting:: format
:type: |type-format|
:tags: ``<tray>``: Shows tray icons
:default: ``<tray>``
Settings
--------
.. poly-setting:: tray-spacing
Space added between tray icons
:type: |type-extent|, non-negative
:default: ``0px``
.. poly-setting:: tray-padding
Space added before and after each tray icon
:type: |type-extent|, non-negative
:default: ``0px``
.. poly-setting:: tray-size
Size of individual tray icons
:type: |type-pwo|, relative to bar height, non-negative
:default: 66%
.. poly-setting:: tray-background
Background color of tray icons
.. note::
This only affects the color of the individual icons and not the space in
between, changing this setting to anything else than the bar background
will likely not look good unless the background color is also changed for
the rest of the tray module (e.g. with ``format-background``).
:type: |type-color|
:default: ``${root.background}``
.. poly-setting:: tray-foreground
Tray icon color
This serves as a hint to the tray icon application for which color to use for
the icon.
This is not guaranteed to have any effect (likely only in GTK3) because it
targets a non-standard part of the `system tray protocol <systray-spec_>`_ by
setting the ``_NET_SYSTEM_TRAY_COLORS`` atom on the tray window.
:type: |type-color|
:default: ``${tray-foreground}``
Example
-------
::
[module/tray]
type = internal/tray
format-margin = 8px
tray-spacing = 8px
Migrating From Legacy Tray Implementation
-----------------------------------------
.. include:: /migration/3.7/tray.rst
References
----------
* `System Tray Protocol Specification <systray-spec_>`_
* `XEmbed Protocol Specification <xembed_>`_
.. _systray-spec: https://specifications.freedesktop.org/systemtray-spec/systemtray-spec-latest.html
.. _xembed: https://specifications.freedesktop.org/xembed-spec/xembed-spec-latest.html