「XCLOCK」

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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
在stderr上输出一个允许使用的选项的简短概要。

-analog
此选项表示显示一个使用刻度标记和指针的12小时的图形时钟。该选项是默认值。

-digital or -d
显示一个24小时的数字时钟。

-brief
对数字时钟使用该选项后,只显示小时和分钟。
不使用该选项时,数字时钟会显示完整的日期和时间。

-utime
对于数字时钟,使用该选项后显示从Epoch开始的秒值,格式为‘970012340 seconds since Epoch’,而不在显示24小时时间。

-strftime format
用于指定数字时钟的显示格式,格式字符串format支持的格式参考strftime(3)。

-twelve
使数字时钟以12小时格式来显示时间。

-twentyfour
使数字时钟以24小时格式来显示时间。使用数字时钟时,该选项是默认的。

-chime
敲钟报时。半小时响一次,一小时响两次。

-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 dig‐

ital clocks is whatever 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 whatever 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 specified 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 correctly. 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 compiled 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 reverseVideo 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_MAN‐

AGER property.

FILES

/etc/X11/app-defaults/XClock

specifies required resources

SEE ALSO

X(7), xrdb(1), time(3), fonts.conf (5).

BUGS

Xclock believes the system clock.

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

参考文献

  • man 1 xclock, version 1.0.7