1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
%D \module
%D [ file=scrn-but, % moved code
%D version=1995.01.01,
%D title=\CONTEXT\ Core Macros,
%D subtitle=Interaction,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\writestatus{loading}{ConTeXt Screen Macros / Buttons}
\unprotect
%D Buttons are just what their names says: things that can be
%D clicked (pushed) on. They are similar to \type{\goto},
%D except that the text argument is not interpreted.
%D Furthermore one can apply anything to them that can be done
%D with \type{\framed}.
%D
%D \startbuffer
%D \button[width=3cm,height=1.5cm]{Exit}[ExitViewer]
%D \stopbuffer
%D
%D \typebuffer
%D
%D gives
%D
%D \getbuffer
%D
%D This command is formally specified as:
%D
%D \showsetup{button}
%D
%D The characteristics can be set with:
%D
%D \showsetup{setupbuttons}
\unexpanded\def\setupbuttons
{\dodoubleargument\getparameters[\??bt]}
\definecomplexorsimpleempty\button
\def\complexbutton
{\docomplexbutton\??bt}
\presetlocalframed[\??bt]
\def\buttonparameter#1{\csname\??bt#1\endcsname} % simple version
\long\def\docomplexbutton#1[#2]#3#4% get rid of possible space before [#4]
{\dodocomplexbutton#1[#2]{#3}#4} % #4 == [
\def\buttonframed{\dodoubleempty\localframed[\??bt]} % goodie
% #3=none is obsolete, just use empty=yes
\long\def\dodocomplexbutton#1[#2]#3[#4]% #3 can contain [] -> {#3} later
{\begingroup
\let\menuparameter\buttonparameter
\doif{\buttonparameter\c!state}\v!stop\locationfalse
\iflocation
\setlocationboxyes#1[#2]{#3}[#4]%
\fi
\endgroup}
%D \macros
%D {overlaybutton}
%D
%D For converience we provide:
%D
%D \starttyping
%D \overlaybutton[reference]
%D \stoptyping
%D
%D This command can be used to define overlays an/or can be
%D used in the whatevertext areas, like:
%D
%D \starttyping
%D \defineoverlay[PrevPage][\overlaybutton{PrevPage}]
%D \setupbackgrounds[page][background=PrevPage]
%D \setuptexttexts[\overlaybutton{NextPage}]
%D \stoptyping
%D
%D For practical reasons, this macro accepts square brackets
%D as well as braces.
\definecomplexorsimple\overlaybutton
\def\simpleoverlaybutton#1%
{\complexoverlaybutton[#1]}
\def\complexoverlaybutton[#1]%
{\iflocation
\gotobox{\overlayfakebox}[#1]%
\fi}
\def\overlayfakebox
{\hbox
{\setbox\scratchbox\null
\wd\scratchbox\overlaywidth
\ht\scratchbox\overlayheight
\box\scratchbox}}
%D Done.
\setupbuttons
[\c!state=\v!start,
\c!width=\v!fit,
\c!height=\v!broad,
\c!offset=0.25em,
\c!frame=\v!on,
\c!background=,
\c!backgroundcolor=,
\c!foregroundstyle=\buttonparameter\c!style,
\c!foregroundcolor=\buttonparameter\c!color,
\c!style=\@@iastyle,
\c!color=\@@iacolor,
\c!contrastcolor=\@@iacontrastcolor,
\c!samepage=\v!yes,
\c!unknownreference=\v!yes,
\c!distance=\zeropoint] % for menubuttons
\protect \endinput
|
