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s-present-dark.mkiv /size: 9105 b last modification: 2020-07-01 14:35
1%D \module
2%D   [      file=s-present-dark, % tug-2001
3%D        version=2018.09.25, % 2000.*.*
4%D          title=\CONTEXT\ Style File,
5%D       subtitle=Presentation Environment Dark,
6%D         author=Hans Hagen,
7%D           date=\currentdate,
8%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
9%C
10%C This module is part of the \CONTEXT\ macro||package and is
11%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
12%C details.
13
14\startmodule
[
present
-
dark
]
15
16%D The original document dates from 2000 and was meant for a presentation at \TUG\
17%D 2001. It used widgets and in particular check fields and push buttons.
18%D \JAVASCRIPT\ was used to show or hide them when rolling over, and appearances
19%D changed in a subtle way. It actually worked quite well at that time.
20%D
21%D However, over time these widgets proved to be sort of unstable. For instance we
22%D used the parent|-|child model of which (inheritance and appearance) behaviour
23%D changed over time. We're talking of a few decades ago when \TEX\ was one of the
24%D few (maybe only) tools that could actually support everything that the manual
25%D introduced: the \quote {standard} seemed to be ahead of the viewer. Anyway, we
26%D adapted but it meant that old document in principle were not always future proof.
27%D
28%D We used in this document a push button in the background of the menu so that it
29%D could become visible when rolled over. There were no layers in \PDF\ at that
30%D time! Nowadays such a trick doesn't work well because of the way a viewer
31%D intercepts regions. One gets kind of erratic behaviour when applying \JAVASCRIPT.
32%D
33%D I spent quite some time to test if we could still do the same without side
34%D effects and in the process also noticed that some functionality in \JAVASCRIPT\
35%D seems broken (or changed due to maybe security issues). So, in the end I decided
36%D to simplify the approach and use layers to pop up the menu when the mouse goes
37%D over it but no longer hide it when the mouse leaves that area. It just doesn't
38%D work too well otherwise.
39
40%D We start with the layout. We basically have three areas: edge, margin and text.
41%D Each are more or less the same width.
42
43\setuppapersize
44  [
S
6
]
[
S
6
]
45
46\setuplayout
47  [
backspace
=
3
8
0
pt
,
48   topspace
=
2
0
pt
,
49   leftedge
=
1
0
0
pt
,
50   leftedgedistance
=
1
0
pt
,
51   leftmargin
=
2
3
0
pt
,
52   leftmargindistance
=
2
0
pt
,
53   header
=
0
pt
,
54   footer
=
0
pt
,
55   width
=
2
0
0
pt
,
56   backspace
=
3
6
0
pt
,
57   width
=
2
2
0
pt
,
58   leftmargin
=
2
1
0
pt
,
59   height
=
middle
]
60
61%D The bodyfont is the Latin Modern Variable (of course at that time we used
62%D the Computer Modern predecessors). We still apply protrusion and expansion.
63%D The new \quotation {Modern Latin} look also works ok on screen.
64
65\definefontfeature
66  [
default
]
67  [
default
]
68  [
expansion
=
pure
,
69   protrusion
=
pure
]
70
71\setupalign
72  [
verytolerant
,
stretch
,
hanging
]
 % space
73
74\setupbodyfont
75  [
modernvariable
,
1
1
pt
]
76
77% \setupbodyfont
78%   [modernlatin,11pt]
79
80\setupinmargin
81  [
style
=
,
82   color
=
]
83
84%D We use some predefined \JAVASCRIPT\ functions. These are rather old helpers.
85%D Normally only the libraries (sets of functions) that are used will be
86%D embedded.
87
88\useJSscripts
[
fld
]
89\useJSscripts
[
nav
]
90
91%D The remarks that will pop up. By default they are not visible. Clicking
92%D on the page (or menu item) will show them step by step.
93
94\newcounter
\bofremarks
95\newcounter
\nofremarks
96
97\setupfield
98  [
remark
]
99  [
offset
=
overlay
,
100   option
=
{
readonly
,
hidden
}
,
101   color
=
,
102   style
=
,
103   frame
=
off
]
104
105\defineframed
106  [
remarkable
]
107  [
frame
=
off
,
108   backgroundcolor
=
white
,
109   background
=
RollBackground
]
110
111\starttexdefinition
 unexpanded
 remark
 #
1
#
2
112
113    \doglobal
\increment
\nofremarks
114
115    \definesymbol
116        [
remark
:
x
:
\nofremarks
]
117        [
\remarkable
{
#
1
}
]
118
119    \definesymbol
120        [
remark
:
y
:
\nofremarks
]
121        [
\remarkable
{
#
2
}
]
122
123    \definefield
124        [
remark
:
x
:
\nofremarks
]
[
check
]
[
remark
]
125        [
remark
:
x
:
\nofremarks
]
126        [
remark
:
x
:
\nofremarks
]
127
128    \definefield
129        [
remark
:
y
:
\nofremarks
]
[
check
]
[
remark
]
130        [
remark
:
y
:
\nofremarks
]
131        [
remark
:
y
:
\nofremarks
]
132
133    \inleft
134        [
scope
=
local
]
135        {
136            \hpack
 to
 \hsize
 {
137                \hss
138                \linebox
 {
139                    \fitfield
[
remark
:
y
:
\nofremarks
]
140                }
141            }
142        }
143
144    \bgroup
145
146    \setbox
\scratchbox
\hbox
 {
147        #
1
148    }
149
150    \hpack
 to
 \wd
\scratchbox
 {
151        \wd
\scratchbox
\zeropoint
152        \box
\scratchbox
153        \hss
154        \linebox
 {
155            \fitfield
[
remark
:
x
:
\nofremarks
]
156        }
157        \hss
158    }
159
160    \egroup
161
162\stoptexdefinition
163
164%D We use lots of backgrounds. The \METAPOST\ graphics are a bit overkill
165%D but we keep them.
166
167\setupbackgrounds
168  [
text
]
169  [
background
=
StepFields
]
170
171\defineoverlay
172  [
StepFields
]
173  [
\directsetup
{
syncrefs
}
\overlaybutton
{
ShowRemark
}
]
174
175\setupbackgrounds
176  [
page
]
177  [
background
=
PageBackground
]
178
179%D Just look in \type {java-imp-fld.mkiv} how \type {HideFields} and
180%D alike are defined. They are defined references to \JAVASCRIPT\ calls.
181
182\setupinteraction
183  [
state
=
start
,
184   click
=
no
,
185   menu
=
on
,
186   style
=
,
187   color
=
,
188   frame
=
off
,
189   contrastcolor
=
]
190
191\setupinteractionscreen
192  [
option
=
max
]
193
194\setupbackgrounds
195  [
paper
]
196  [
background
=
color
,
197   backgroundcolor
=
black
]
198
199\defineoverlay
200  [
PageBackground
]
201  [
\useMPgraphic
{
PageBackground
}
]
202
203\startuseMPgraphic
{
PageBackground
}
204    StartPage
 ;
205        numeric
 w
 ;
 w
 :
=
 1.25
 *
 PaperWidth
 ;
206        numeric
 n
 ;
 n
 :
=
 2.50
 *
 PageNumber
 ;
207        numeric
 d
 ;
 d
 :
=
 (
1
 +
 (
PageNumber
-1
)
/
5
)
 *
 5
pt
 ;
208        fill
 Page
209            withcolor
 black
 ;
210        for
 i
=
1
 upto
 500
 :
211            draw
212                center
 Page
213                    randomized
 w
214                    rotatedaround
(
center
 Page
,
n
)
215                withpen
 pencircle
216                    scaled
 (
uniformdeviate
 d
)
217                withcolor
218                    (
yellow
 randomized
 (
.3
,
.8
)
)
219            ;
220        endfor
 ;
221    StopPage
 ;
222\stopuseMPgraphic
223
224\defineoverlay
225  [
TextBackground
]
226  [
\uniqueMPgraphic
{
TextBackground
}
]
227
228\startuniqueMPgraphic
{
TextBackground
}
229    fill
230        OverlayBox
231        withcolor
 black
 ;
232    draw
233        OverlayBox
234        withpen
 pencircle
 scaled
 1
pt
235        withcolor
 OverlayColor
 ;
236\stopuniqueMPgraphic
237
238\defineoverlay
239  [
RollBackground
]
240  [
\uniqueMPgraphic
{
RollBackground
}
]
241
242\startuniqueMPgraphic
{
RollBackground
}
243    fill
244        OverlayBox
245        withcolor
 black
 ;
246    draw
247        OverlayBox
248        withpen
 pencircle
 scaled
 1
pt
249        withcolor
 OverlayColor
 ;
250\stopuniqueMPgraphic
251
252\setupinteractionmenu
253  [
left
]
254  [
state
=
start
,
255   width
=
\leftedgewidth
,
256   frame
=
on
,
257   framecolor
=
white
,
258   rulethickness
=
1
pt
,
259   foregroundcolor
=
white
,
260   background
=
RollBackground
]
261
262\startsetups
 syncrefs
263    \normalexpanded
 {
264        \definereference
265           [
ShowRemark
]
266           [
StepFields
{
remark
:
x
,
\bofremarks
,
\nofremarks
}
,
267            StepFields
{
remark
:
y
,
\bofremarks
,
\nofremarks
}
]
268    }
269\stopsetups
270
271%D The menu buttons used to be rollover buttons but are now normal simple
272%D ones (more predictable).
273
274\defineviewerlayer
275  [
buttons
]
276
277\startinteractionmenu
[
left
]
278    \vfill
279    \directsetup
{
syncrefs
}
280    \startviewerlayer
[
buttons
]
281        \startbut
 [
previouspage
,
HideFields
]
  Previous
 \stopbut
282        \startbut
 [
nextpage
,
HideFields
]
      Next
     \stopbut
283        \startbut
 [
ShowRemark
]
               Remark
   \stopbut
284        \startbut
 [
HideFields
]
               Reset
    \stopbut
285        \startbut
 [
CloseDocument
,
HideFields
]
 Quit
     \stopbut
286    \stopviewerlayer
287\stopinteractionmenu
288
289\setupinteraction
290  [
closeaction
=
ForgetChanges
,
291   openpageaction
=
{
HideFields
,
HideLayer
{
buttons
}
}
,
292   closepageaction
=
{
HideFields
,
HideLayer
{
buttons
}
}
]
293
294\defineoverlay
295  [
ShowMenu
]
296  [
\overlayrollbutton
{
VideLayer
{
buttons
}
}
{
}
]
297
298\setupbackgrounds
299  [
text
]
[
leftedge
]
300  [
backgroundoffset
=
1
0
pt
,
301   background
=
ShowMenu
]
302
303%D The environment has been adapted a bit. Instead of taking two
304%D arguments we now use a key|-|value approach. The remark is shown
305%D when one rolls over the title (author).
306
307\defineframedtext
308  [
MainText
]
309  [
frame
=
off
,
310   offset
=
1
0
pt
,
311   width
=
\textwidth
,
312   before
=
,
313   after
=
,
314   color
=
,
315   foregroundcolor
=
white
,
316   background
=
TextBackground
,
317   backgroundcolor
=
white
]
318
319\starttexdefinition
 unexpanded
 StartIdea
320    \dosingleempty
{
\texdefinition
{
StartIdeaIndeed
}
}
321\stoptexdefinition
322
323\starttexdefinition
 StartIdeaIndeed
 [
#
1
]
324    \let
\bofremarks
\nofremarks
325    \increment
\bofremarks
326    \startstandardmakeup
327    \setvariables
[
Idea
]
[
#
1
]
328    \startMainText
329    \setupalign
[
verytolerant
,
stretch
,
hanging
]
330\stoptexdefinition
331
332\starttexdefinition
 unexpanded
 StopIdea
333    \doifvariable
 {
Idea
}
 {
text
}
 {
334        \blank
335        \rightaligned
 {
336            \doifelsevariable
 {
Idea
}
 {
remark
}
 {
337                \tooltip
338                    [
left
]
339                    {
\getvariable
{
Idea
}
{
title
}
}
340                    {
\getvariable
{
Idea
}
{
remark
}
}
341            }
 {
342                \getvariable
{
Idea
}
{
title
}
343            }
344        }
345    }
346    \stopMainText
347    \vfill
348    \stopstandardmakeup
349\stoptexdefinition
350
351\stopmodule
352
353\continueifinputfile
{
s
-
present
-
dark
.
mkiv
}
354
355\usemodule
[
present
-
common
]
356
357\inputpresentationfile
{
tug
/
2
0
0
1
/
tug
-
2
0
0
1
-
ideas
.
tex
}
358
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