diff options
Diffstat (limited to 'doc/font.n')
| -rw-r--r-- | doc/font.n | 55 |
1 files changed, 39 insertions, 16 deletions
@@ -5,7 +5,7 @@ '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" -'\" RCS: @(#) $Id: font.n,v 1.15 2007/10/23 14:07:44 das Exp $ +'\" RCS: @(#) $Id: font.n,v 1.16 2007/10/24 14:32:58 dkf Exp $ '\" .so man.macros .TH font n 8.0 Tk "Tk Built-In Commands" @@ -84,7 +84,9 @@ Measures the amount of space the string \fItext\fR would use in the given see FONT DESCRIPTIONS below. If the \fIwindow\fR argument is omitted, it defaults to the main window. The return value is the total width in pixels of \fItext\fR, not including the extra pixels used by highly exaggerated -characters such as cursive ``f''. If the string contains newlines or tabs, +characters such as cursive +.QW f . +If the string contains newlines or tabs, those characters are not expanded or treated specially when measuring the string. .TP @@ -118,9 +120,10 @@ font will be substituted automatically. [2] \fIsystemfont\fR . 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 ``\fB*\fR'' +This also includes, under X, an XLFD (see [4]) for which a single +.QW \fB*\fR 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. +name. See \fBPLATFORM-SPECIFIC\fR issues for a list of the system fonts. .TP [3] \fIfamily \fR?\fIsize\fR? ?\fIstyle\fR? ?\fIstyle ...\fR? . @@ -142,14 +145,22 @@ underline overstrike\fR . A Unix-centric font name of the form \fI-foundry-family-weight-slant-setwidth-addstyle-pixel-point-resx-resy-spacing-width-charset-encoding\fR. -The ``\fB*\fR'' character may be used to skip individual fields that the -user does not care about. There must be exactly one ``\fB*\fR'' for each -field skipped, except that a ``\fB*\fR'' at the end of the XLFD skips any -remaining fields; the shortest valid XLFD is simply ``\fB*\fR'', signifying +The +.QW \fB*\fR +character may be used to skip individual fields that the +user does not care about. There must be exactly one +.QW \fB*\fR +for each field skipped, except that a +.QW \fB*\fR +at the end of the XLFD skips any +remaining fields; the shortest valid XLFD is simply +.QW \fB*\fR , +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'' +correct, all existing applications using XLFDs assumed that one +.QW point was in fact one pixel and would display incorrectly (generally larger) if the correct size font were actually used. .TP @@ -173,9 +184,13 @@ an error is generated. The following options are used by the \fBfont metrics\fR 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 +font. In the following definitions, the +.QW 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. +such as lower-case +.QW g +stick below the baseline. .TP \fB\-ascent \0\fR . @@ -196,9 +211,13 @@ above the baseline line plus the descent below the baseline. .TP \fB\-fixed \0\fR . -Returns a boolean flag that is ``\fB1\fR'' if this is a fixed-width font, +Returns a boolean flag that is +.QW \fB1\fR +if this is a fixed-width font, where each normal character is the same width as all the other -characters, or is ``\fB0\fR'' if this is a proportionally-spaced font, where +characters, or is +.QW \fB0\fR +if this is a proportionally-spaced font, where individual characters have different widths. The widths of control characters, tab characters, and other non-printing characters are not included when calculating this value. @@ -210,9 +229,13 @@ above: \fB\-family \fIname\fR . The case-insensitive font family name. Tk guarantees to support the font -families named \fBCourier\fR (a monospaced ``typewriter'' font), \fBTimes\fR -(a serifed ``newspaper'' font), and \fBHelvetica\fR (a sans-serif -``European'' font). The most closely matching native font family will +families named \fBCourier\fR (a monospaced +.QW typewriter +font), \fBTimes\fR (a serifed +.QW newspaper +font), and \fBHelvetica\fR (a sans-serif +.QW European +font). The most closely matching native font family will automatically be substituted when one of the above font families is used. The \fIname\fR 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 |