1Tk::FontDialog(3) User Contributed Perl Documentation Tk::FontDialog(3)
2
6 Tk::FontDialog - a font dialog widget for perl/Tk
7
9 use Tk::FontDialog;
10 $font = $top->FontDialog->Show;
11
13 Tk::FontDialog implements a font dialog widget.
14 The dialog is displayed by calling the Show method. The returned value
16 is either the selected font (if the dialog was closed with the Ok
17 button) or undef (otherwise). The exact type of the return value is
18 either a Tk::Font object (in Tk800) or a font name string (usually
19 something like "font1"). Both can be used as values in Tk "-font"
20 options. See "GetDescriptiveFontName"
21 In the Family and Size listboxes, the font family and font size can be
23 specified. The checkbuttons on the right turn on bold, italic,
24 underlined and overstriked variants of the chosen font. A sample of the
25 font is shown in the middle area.
26 With the "Alt sample" checkbutton, it is possible to show all
28 characters in the charset instead of the default text. "Fixed only"
29 restricts the font family list to fixed fonts only. If the "Nicefonts"
30 checkbutton is set, then the font names in the listbox are displayed in
31 the corresponding font. Note that this option can be slow if a lot of
32 fonts are installed or for 16 bit fonts.
33 A click with the right button in the font size listbox pops up a window
35 to enter arbitrary font sizes.
36
38 -font
39 The dialog font.
40 -initfont
42 The initial font.
43 -fontsizes
45 A list of font sizes. The default contains sizes from 0 to 72
46 points (XXX or pixels?).
47 -nicefont
49 If set, font names are displayed in its font style. This may be
50 slow, especially if you have many fonts or 16 bit fonts (e.g. Asian
51 fonts).
52 -nicefontsbutton
54 If set to false, then the "Nice fonts" button is not displayed.
55 -fixedfont
57 If set, proportional font families are not listed, leaving only the
58 fixed fonts. This is slow, as each font must be checked to see if
59 it is fixed or proportional.
60 -fixedfontsbutton
62 If set to false, then the "Fixed fonts" button is not displayed.
63 -sampletext
65 The sample text which should contain all letters. The default is
66 "The Quick Brown Fox Jumps Over The Lazy Dog" German readers may
67 probably use "Franz jagt im komplett verwahrlosten Taxi quer durch
68 Bayern".
69
71 There are a couple of options to change the labels of the dialog. Note
72 that you can prepend a tilde ("~") to get an accelerator key with
73 "Alt". Here is a list of these options with the default (English)
74 setting:
75 -familylabel (Family:)
77 -sizelabel (Size:)
78 -weightlabel (Bold)
79 -slantlabel (Italic)
80 -underlinelabel (Underline)
81 -overstrikelabel (Overstrike)
82 -oklabel (OK)
83 -applylabel (Apply)
84 -cancellabel (Cancel)
85 -altsamplelabel (Alt sample)
86 -nicefontslabel (Nicefonts)
87 -fixedfontslabel (Fixed Only)
88 -title (Choose font)
89 -customsizetitle (Choose font size)
90
92 RefontTree(-font => $font)
93 Additionaly, the convenience method RefontTree is defined in the
94 Tk::Widget namespace. Using this method a font definition could be
95 applied to a complete subtree of a widget. This is similar to the
96 method RecolorTree. Calling RefontTree looks like this:
97 $font = $mw->FontDialog->Show;
99 $mainwindow->RefontTree(-font => $font) if defined $font;
100 By default RefontTree does not change the font of canvas elements.
102 This can be done by specifying "-canvas => 1".
103 GetDescriptiveFontName($fontname)
105 Return a "descriptive" font name (just like form [3] as described
106 in Tk::Font). The return value from the Show() method has the
107 disadvantage that it is only valid for the current Tk session. A
108 "descriptive" font name may be stored and reused later.
109
111 Note that font names with whitespace like "New century schoolbook" or
112 "MS Sans Serif" can cause problems when using in a -font option. The
113 solution is to put the names in Tcl-like braces, like
114 -font => "{New century schoolbook} 10"
116
118 To apply a selected font to a specific widget, use the following
119 snippet:
120 $font = $mw->FontDialog->Show;
122 if (defined $font) {
123 $button->configure(-font => $font);
124 }
125 This example uses the convenience method RefontTree to apply the new
127 font to the whole application:
128 use Tk;
130 use Tk::FontDialog;
131 $mw = tkinit;
132 $mw->Label(-text => "Test")->pack;
133 $mw->Button(-text => "Another test")->pack;
134 $mw->Button(-text => "Use Tk::FontDialog",
135 -command => sub {
136 my $font = $mw->FontDialog->Show;
137 if (defined $font) {
138 $mw->RefontTree(-font => $font);
139 }
140 })->pack;
141 MainLoop;
142 To get the "descriptive" font name:
144 $font = $mw->FontDialog->Show;
146 if (defined $font) {
147 $font_descriptive = $mw->GetDescriptiveFontName($font);
148 print $font_descriptive, "\n";
149 }
150
152 The latest released version is available from cpan (e.g.
153 <http://search.cpan.org/~srezic/>). The latest development version is
154 available from github (<http://github.com/eserte/tk-fontdialog>).
155
157 - ConfigSpecs handling is poor
158 put at least -font into configspecs
159 - run test, call dialog for 2nd time: immediate change of font?
160 - better name for nicefont
161 - restrict on charsets and encodings (xlsfonts? X11::Protocol::ListFonts?)
162 difficult because core Tk font handling ignores charsets and encodings
163
165 Tk::Font
166
168 Slaven Rezic <slaven@rezic.de>
169 Suggestions by Michael Houghton, Martin Thurn, Jack, Justin Kozlowitz
171 and others.
172
174 Copyright (c) 1998,1999,2003,2004,2005,2010 Slaven Rezic. All rights
175 reserved. This module is free software; you can redistribute it and/or
176 modify it under the same terms as Perl itself.
177perl v5.30.0 2019-07-26 Tk::FontDialog(3)