Windows PowerShell command on Get-command font

Manual Pages for UNIX Operating System command usage for man font

Tk Built-In Commands font(1T)

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NAME

font - Create and inspect fonts.

SYNOPSIS

font option ?arg arg ...?

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DESCRIPTION

The font command provides several facilities for dealing

with fonts, such as defining named fonts and inspecting the

actual attributes of a font. The command has several dif-

ferent forms, determined by the first argument. The follow-

ing forms are currently supported:

font actual font ?-displayof window? ?option?

Returns information about the actual attributes that

are obtained when font is used on window's display; the

actual attributes obtained may differ from the attri-

butes requested due to platform-dependent limitations,

such as the availability of font families and

pointsizes. font is a font description; see FONT

DESCRIPTIONS below. If the window argument is omitted,

it defaults to the main window. If option is speci-

fied, returns the value of that attribute; if it is

omitted, the return value is a list of all the attri-

butes and their values. See FONT OPTIONS below for a list of the possible attributes.

font configure fontname ?option? ?value option value ...?

Query or modify the desired attributes for the named

font called fontname. If no option is specified,

returns a list describing all the options and their

values for fontname. If a single option is specified

with no value, then returns the current value of that

attribute. If one or more option-value pairs are

specified, then the command modifies the given named

font to have the given values; in this case, all widg-

ets using that font will redisplay themselves using the

new attributes for the font. See FONT OPTIONS below

for a list of the possible attributes.

font create ?fontname? ?option value ...?

Creates a new named font and returns its name.

fontname specifies the name for the font; if it is

omitted, then Tk generates a new name of the form

fontx, where x is an integer. There may be any number

of option-value pairs, which provide the desired attri-

butes for the new named font. See FONT OPTIONS below

for a list of the possible attributes. Tk Last change: 8.0 1

Tk Built-In Commands font(1T)

font delete fontname ?fontname ...?

Delete the specified named fonts. If there are widgets

using the named font, the named font won't actually be

deleted until all the instances are released. Those widgets will continue to display using the last known

values for the named font. If a deleted named font is

subsequently recreated with another call to font

create, the widgets will use the new named font and

redisplay themselves using the new attributes of that

font.

font families ?-displayof window?

The return value is a list of the case-insensitive

names of all font families that exist on window's

display. If the window argument is omitted, it defaults to the main window.

font measure font ?-displayof window? text

Measures the amount of space the string text would use

in the given font when displayed in window. font is a

font description; see FONT DESCRIPTIONS below. If the

window argument is omitted, it defaults to the main window. The return value is the total width in pixels of text, not including the extra pixels used by highly exaggerated characters such as cursive ``f''. If the string contains newlines or tabs, those characters are not expanded or treated specially when measuring the string.

font metrics font ?-displayof window? ?option?

Returns information about the metrics (the font-

specific data), for font when it is used on window's

display. font is a font description; see FONT DESCRIP-

TIONS below. If the window argument is omitted, it defaults to the main window. If option is specified, returns the value of that metric; if it is omitted, the return value is a list of all the metrics and their

values. See FONT METRICS below for a list of the pos-

sible metrics.

font names

The return value is a list of all the named fonts that

are currently defined.

FONT DESCRIPTION

The following formats are accepted as a font description

anywhere font is specified as an argument above; these same

forms are also permitted when specifying the -font option

for widgets.

[1] fontname

The name of a named font, created using the font create

Tk Last change: 8.0 2

Tk Built-In Commands font(1T)

command. When a widget uses a named font, it is

guaranteed that this will never cause an error, as long

as the named font exists, no matter what potentially

invalid or meaningless set of attributes the named font

has. If the named font cannot be displayed with

exactly the specified attributes, some other close font

will be substituted automatically.

[2] systemfont

The platform-specific name of a font, interpreted by

the graphics server. This also includes, under X, an XLFD (see [4]) for which a single ``*'' character was used to elide more than one field in the middle of the

name. See PLATFORM-SPECIFIC issues for a list of the

system fonts.

[3] family ?size? ?style? ?style ...? || A properly formed list whose first element is the |

desired font family and whose optional second element |

is the desired size. The interpretation of the size |

attribute follows the same rules described for -size in |

FONT OPTIONS below. Any additional optional arguments |

following the size are font styles. Possible values |

for the style arguments are as follows: | normal bold roman italic | underline overstrike |

[4] X- |

font names (XLFD) ||

A Unix-centric font name of the form -foundry-family- |

weight-slant-setwidth-addstyle-pixel-point-resx- |

resy-spacing-width-charset-encoding. The ``*'' charac- |

ter may be used to skip individual fields that the user | does not care about. There must be exactly one ``*'' | for each field skipped, except that a ``*'' at the end | of the XLFD skips any remaining fields; the shortest | valid XLFD is simply ``*'', signifying all fields as | defaults. Any fields that were skipped are given | default values. For compatibility, an XLFD always |

chooses a font of the specified pixel size (not point |

size); although this interpretation is not strictly | correct, all existing applications using XLFDs assumed | that one ``point'' was in fact one pixel and would | display incorrectly (generally larger) if the correct |

size font were actually used.

[5] option value ?option value ...?

A properly formed list of option-value pairs that

specify the desired attributes of the font, in the same

format used when defining a named font; see FONT

Tk Last change: 8.0 3

Tk Built-In Commands font(1T)

OPTIONS below.

When font description font is used, the system attempts to

parse the description according to each of the above five rules, in the order specified. Cases [1] and [2] must match

the name of an existing named font or of a system font.

Cases [3], [4], and [5] are accepted on all platforms and

the closest available font will be used. In some situations

it may not be possible to find any close font (e.g., the

font family was a garbage value); in that case, some

system-dependent default font is chosen. If the font

description does not match any of the above patterns, an error is generated. FONT METRICS

The following options are used by the font metrics command

to query font-specific data determined when the font was

created. These properties are for the whole font itself and

not for individual characters drawn in that font. In the

following definitions, the ``baseline'' of a font is the

horizontal line where the bottom of most letters line up;

certain letters, such as lower-case ``g'' stick below the

baseline.

-ascent

The amount in pixels that the tallest letter sticks up

above the baseline of the font, plus any extra blank

space added by the designer of the font.

-descent

The largest amount in pixels that any letter sticks

down below the baseline of the font, plus any extra

blank space added by the designer of the font.

-linespace

Returns how far apart vertically in pixels two lines of

text using the same font should be placed so that none

of the characters in one line overlap any of the char-

acters in the other line. This is generally the sum of the ascent above the baseline line plus the descent below the baseline.

-fixed

Returns a boolean flag that is ``1'' if this is a

fixed-width font, where each normal character is the

same width as all the other characters, or is ``0'' if

this is a proportionally-spaced font, where individual

characters have different widths. The widths of con-

trol characters, tab characters, and other non-printing

characters are not included when calculating this value. Tk Last change: 8.0 4

Tk Built-In Commands font(1T)

FONT OPTIONS The following options are supported on all platforms, and

are used when constructing a named font or when specifying a

font using style [5] as above:

-family name

The case-insensitive font family name. Tk guarantees

to support the font families named Courier (a

monospaced ``typewriter'' font), Times (a serifed

``newspaper'' font), and Helvetica (a sans-serif

``European'' font). The most closely matching native

font family will automatically be substituted when one

of the above font families is used. The name may also

be the name of a native, platform-specific font family;

in that case it will work as desired on one platform but may not display correctly on other platforms. If

the family is unspecified or unrecognized, a platform-

specific default font will be chosen. |

-size size ||

The desired size of the font. If the size argument is |

a positive number, it is interpreted as a size in | points. If size is a negative number, its absolute |

value is interpreted as a size in pixels. If a font |

cannot be displayed at the specified size, a nearby | size will be chosen. If size is unspecified or zero, a |

platform-dependent default size will be chosen. |

Sizes should normally be specified in points so the | application will remain the same ruler size on the | screen, even when changing screen resolutions or moving | scripts across platforms. However, specifying pixels | is useful in certain circumstances such as when a piece |

of text must line up with respect to a fixed-size bit- |

map. The mapping between points and pixels is set when | the application starts, based on properties of the | installed monitor, but it can be overridden by calling | the tk scaling command. |

-weight weight

The nominal thickness of the characters in the font.

The value normal specifies a normal weight font, while

bold specifies a bold font. The closest available

weight to the one specified will be chosen. The default weight is normal.

-slant slant

The amount the characters in the font are slanted away

from the vertical. Valid values for slant are roman

and italic. A roman font is the normal, upright

appearance of a font, while an italic font is one that

is tilted some number of degrees from upright. The Tk Last change: 8.0 5

Tk Built-In Commands font(1T)

closest available slant to the one specified will be chosen. The default slant is roman.

-underline boolean

The value is a boolean flag that specifies whether

characters in this font should be underlined. The

default value for underline is false.

-overstrike boolean

The value is a boolean flag that specifies whether a horizontal line should be drawn through the middle of

characters in this font. The default value for over-

strike is false.

PLATFORM-SPECIFIC ISSUES

The following named system fonts are supported:

X Windows:

All valid X font names, including those listed by

xlsfonts(1), are available.

MS Windows: system ansi device systemfixed ansifixed oemfixed Mac OS X: system application menu

EXAMPLE

Fill a text widget with lots of font demonstrators, one for

every font family installed on your system:

pack [text .t -wrap none] -fill both -expand 1

set count 0 set tabwidth 0

foreach family [lsort -dictionary [font families]] {

.t tag configure f[incr count] -font [list $family 10]

.t insert end ${family}:\t {} \

"This is a simple sampler\n" f$count

set w [font measure [.t cget -font] ${family}:]

if {$w+5 > $tabwidth} {

set tabwidth [expr {$w+5}]

.t configure -tabs $tabwidth

} }

Tk Built-In Commands font(1T)

KEYWORDS

font

ATTRIBUTES

See attributes(5) for descriptions of the following attri-

butes:

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| ATTRIBUTE TYPE | ATTRIBUTE VALUE|

|____________________|__________________|_

| Availability | runtime/tk-8 |

|____________________|__________________|_

| Interface Stability| Uncommitted |

|____________________|_________________|

NOTES Source for Tk is available on http://opensolaris.org. Tk Last change: 8.0 7