xclock Man page

Resume Wikipedia de X Window System

X Window System, X11 ou simplement X est un environnement de bureau de type « fenêtré » qui gère l’interaction homme-machine par l’écran, la souris et le clavier de certains ordinateurs en réseau. Il est souvent appelé X Window, à ne pas confondre avec x windows.
C’est le système standard ouvert d’interaction graphique avec l’utilisateur sur les UNIX (Linux, BSD, etc.). Le serveur X est optionnel sur macOS (qui utilise nativement Quartz). Il est possible d’installer un serveur X sur la plupart des systèmes d’exploitation, dont Windows. On dit communément d’une application qu’elle tourne sous X lorsqu’elle est conçue pour l’environnement X.
X est actuellement dirigé par la Fondation X.Org, avec son implémentation actuelle : X.Org.

XCLOCK(1) General Commands Manual XCLOCK(1)

NAME

xclock – analog / digital clock for X

SYNOPSIS

xclock [ -help ] [ -analog | -digital ] [ -brief ] [ -chime ] [ -hd
color ] [ -hl color ] [ -update seconds ] [ -strftime format ] [
-twelve | -twentyfour | -utime ] [ -padding number ] [ -norender ] [
-render ] [ -sharp ] [ -face pattern ]

DESCRIPTION

The xclock program displays the time in analog or digital form. The
time is continuously updated at a frequency which may be specified by
the user.

OPTIONS

Xclock accepts all of the standard X Toolkit command line options along
with the additional options listed below:

-help This option indicates that a brief summary of the allowed
options should be printed on the standard error.

-analog This option indicates that a conventional 12 hour clock face
with tick marks and hands should be used. This is the default.

-digital or -d
This option indicates that a 24 hour digital clock should be
used.

-brief This option indicates that the digital clock should only dis‐
play the hours and minutes fields. The default is to show the
full time and date information.

-utime This option indicates that a digital clock should display sec‐
onds since the Epoch (in format ‘970012340 seconds since Epoch’
instead of a standard 24-hour time.

-strftime format
This option allows an strftime format string to be specified
for the digital clock’s display.

-twelve This option indicates that a digital clock should display the
time in twelve hour format.

-twentyfour
This option indicates that a digital clock should display the
time in twenty-four hour format. This is the default when a
digital clock is used.

-chime This option indicates that the clock should chime once on the
half hour and twice on the hour.

-hands color (or -hd color)
This option specifies the color of the hands on an analog
clock. The default is black. This option is effectively
ignored when Xrender is in use.

-highlight color (or -hl color)
This option specifies the color of the edges of the hands on an
analog clock, and is only useful on color displays. The
default is black. This option is effectively ignored when
Xrender is in use.

-update seconds
This option specifies the frequency in seconds at which xclock
should update its display. If the clock is obscured and then
exposed, it will be updated immediately. A value of 30 seconds
or less will enable a second hand on an analog clock. The
default is 60 seconds.

-padding number
This option specifies the width in pixels of the padding
between the window border and clock text or picture. The
default is 10 on a digital clock and 8 on an analog clock.

-render This option tells xclock to use the Xrender extension to draw
an anti-aliased face. This is the default if xclock has been
compiled with Xrender support. Note that the color selection
options and resources used when Xrender is in effect differ
from the standard options.

-norender
This option turns off the use of Xrender to draw the clock.

-sharp This option tells xclock to use sharper edges when drawn using
the Xrender extension.

-face pattern
This option specifies the font to use in digital mode when the
Xrender extension is used. Patterns are specified using the
fontconfig face format described in the Font Names section of
fonts.conf(5).

X DEFAULTS
This program uses the Clock widget. It understands all of the core
resource names and classes as well as:

width (class Width)
Specifies the width of the clock. The default for analog
clocks is 164 pixels; the default for digital clocks is what‐
ever is needed to hold the clock when displayed in the chosen
font.

height (class Height)
Specifies the height of the clock. The default for analog
clocks is 164 pixels; the default for digital clocks is what‐
ever is needed to hold the clock when displayed in the chosen
font.

update (class Interval)
Specifies the frequency in seconds at which the time should be
redisplayed.

foreground (class Foreground)
Specifies the color for the tick marks. The default depends on
whether reverseVideo is specified. If reverseVideo is speci‐
fied the default is lwhite, otherwise the default is black.

hands (class Foreground)
Specifies the color of the insides of the clock’s hands. The
default depends on whether reverseVideo is specified. If
reverseVideo is specified the default is lwhite, otherwise the
default is black. Note that this resource is not used when
Xrender is in effect.

highlight (class Foreground)
Specifies the color used to highlight the clock’s hands. The
default is
depends on whether reverseVideo is specified. If reverseVideo
is specified the default is lwhite, otherwise the default is
black. Note that this resource is not used when Xrender is in
effect.

analog (class Boolean)
Specifies whether or not an analog clock should be used instead
of a digital one. The default is True.

twentyfour (class Boolean)
Specifies whether or not a digital clock should display the
time in twenty-four hour format. The default is True.

chime (class Boolean)
Specifies whether or not a bell should be rung on the hour and
half hour.

padding (class Margin)
Specifies the amount of internal padding in pixels to be used.
The default is 8.

font (class Font)
Specifies the font to be used for the digital clock. Note that
variable width fonts currently will not always display cor‐
rectly. This font is only used when Xrender is not in effect.

render (class Boolean)
Specifies whether or not the Xrender extension should be used
for the display. The default is True if xclock has been com‐
piled with Xrender support.

When Xrender is in effect, the following additional resources are
understood:

face (class FaceName)
Specify the pattern for the font to be used for the digital
clock when Xrender is used. Patterns are specified using the
fontconfig face format described in the Font Names section of
fonts.conf(5).

sharp (class Boolean)
Specifies if sharp edges should be used when rendering the
clock. The default is False.

buffer (class Boolean)
Specifies that the updates of the image are drawn to a pixmap
before copied into the window instead drawing them into the
window directly.

The defaults of the following color resources depend on whether rever‐
seVideo is specified. If reverseVideo is specified the default is
lwhite, otherwise the default is black.

hourColor (class Foreground)
The color of the hour hand.

minuteColor (class Foreground)
The color of the minute hand.

secondColor (class Foreground)
The color of the second hand.

majorColor (class Foreground)
The color of the major scale ticks (i. e. each five minutes).

minorColor (class Foreground)
The color of the minor scale ticks (between major ticks).

WIDGETS
In order to specify resources, it is useful to know the hierarchy of
the widgets which compose xclock. In the notation below, indentation
indicates hierarchical structure. The widget class name is given
first, followed by the widget instance name.

XClock xclock
Clock clock

ENVIRONMENT
DISPLAY to get the default host and display number.

XENVIRONMENT
to get the name of a resource file that overrides the global
resources stored in the RESOURCE_MANAGER property.

FILES
/etc/X11/app-defaults/XClock
specifies required resources

SEE ALSO

X(7), xrdb, time, fonts.conf (5).

BUGS

Xclock believes the system clock.

When in digital mode, the string should be centered automatically.

AUTHORS
Tony Della Fera (MIT-Athena, DEC)
Dave Mankins (MIT-Athena, BBN)
Ed Moy (UC Berkeley)

X Version 11 xclock 1.0.7 XCLOCK(1)

Ils en parlent aussi

6 Useful X-based (Gui Based) Linux Commands – Part II – Tecmint
how to get xclock installed – Que Forum