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authorNorbert Preining <norbert@preining.info>2021-04-20 03:00:55 +0000
committerNorbert Preining <norbert@preining.info>2021-04-20 03:00:55 +0000
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-%% This is part of the OpTeX project, see http://petr.olsak.net/optex
-
-\slides % OpTeX slides style activated
-
-\catcode`<=13 % special printing of <text>
-\def<#1>{\hbox{$\langle$\it#1\/$\rangle$}}
-\everyintt={\catcode`\<=13}
-
-\hyperlinks\Blue\Blue % hyperlinks are used in the title page
-\backgroundpic{op-slides-bg.png} % background picture
-
-\verbchar` % inline verbatim
-\enquotes % English quotes \"..."
-
-\slideshow %------------------------------------------------------------
-
-
-\tit \OpTeX/ slides
-
-\subtit Petr Olšák\nl petr@olsak.net
-
-\subtit\rm \url{http://petr.olsak.net/optex}
-
-\pg; %------------------------------------------------------------------
-
-\sec Basics
-
-* The the simple document looks like:
-
-\begtt
-\slides % style initialized
-%\wideformat % 16:9
-\slideshow % partially uncovering ideas
-
-\sec First slide
-text
-\pg;
-
-\sec Second slide
-text
-\pg.
-\endtt
-
-* If `\slideshow` is missing or commented out then
- \"partially uncovering ideas" (see later) are deactivated. It is useful
- for printing.
-* The `\slideshow` must be the last command in the declaration part of the
- document.
-* By default, the slides have A5 landscape format.
- You can declare `\wideformat`. Then the height is the same
- but width is 263\,mm, i.\,e.~the ratio width:height is 16:9.
-
-\pg; %------------------------------------------------------------------
-
-\sec Title slide
-
-* Title of the document (used at the first slide) is created
- by `\tit Title` (terminated by end of line).
-* The `\subtit Author name etc.`\ (terminated by end of line)
- can be used after `\tit` at the first slide.
-* You can use `\nl` for a new line in paragraphs or titles.
-
-\sec Default design
-
-* The paragraph texts are ragged right.
-* Titles, subtitles, and section titles are centered.
-* The `\sec` and `\secc` are printed without numbers.
-* No paragraph indentation, a little vertical space between paragraphs.
-* The Heros font family (aka Helvetica) is initialized as default.\nl
- Sans-serif FiraMath font for math typesetting is used.\nl
- If `\fontfam[<famname>]` precedes `\slides` then it rewrites default.
-* The items in lists are started by a blue square (`\type X` and `\type x` ).
-
-\pg; %------------------------------------------------------------------
-
-\sec One slide (one page)
-
-* Top-level item list is activated by default. The asterisk `*` opens
- new item at the top-level list.
-* Nested items lists (second and more level) should be created in
- the `\begitems`\dots`\enditems` environments.
-* Each slide (page) must be terminated by `\pg;` command.
-* The last slide must be terminated by `\pg.` command or by `\bye`.
-
-\begtt
-\sec My ideas
-
-* First idea
-* Second idea
- \begitems
- * First sub-idea
- * Second sub-idea
- \enditems
-* Final idea
-\endtt
-
-* Note: each page is processed in a group, so: put your own definitions
- (if~exist) before `\slideshow` or use `\global` assignment.
-
-\pg; %------------------------------------------------------------------
-
-\sec Partially uncovering ideas
-
-* The control sequence `\pg` must be followed by:\pg+
-\begitems
-* the character `;` -- normal next page,\pg+
-* the character `.` -- the end of the document,\pg+
-* the character `+` -- next page keeps the same text
- and a next text is added (usable for partially uncovering of ideas).\pg+
-\enditems
-
-* Summary:
-\begtt
-\pg; ... next page
-\pg. ... the end of the document
-\pg+ ... uncover next text on the same page
-\endtt
-\pg+
-
-* When `\slideshow` is not declared then `\pg+` is deactivated.\pg+
-* The `\pg+` creates a new \"virtual page", so the current paragraph is
- terminated.
-
-\pg; %------------------------------------------------------------------
-
-\sec Example with partially uncovering ideas
-
-The previous page was created by:
-
-\begtt
-\sec Partially uncovering ideas
-
-* The control sequence `\pg` must be followed by:\pg+
-
-\begitems
-* the character `.` -- normal next page,\pg+
-* the character `;` -- the end of the document,\pg+
-* the character `+` -- next ... \pg+
-\enditems
-
-* Summary
-...
-* When `\slideshow` is not declared
- then `\pg+` is deactivated.\pg+
-* The `\pg+` creates a new \"virtual page",
- so the current paragraph is terminated.
-\pg;
-\endtt
-
-\pg; %------------------------------------------------------------------
-
-\sec Notes to `\slideshow`
-
-* When `\slideshow` is active then you cannot reference sections by
- hyperlinked `\ref`. Only `\pgref` works (and goes to the last layer
- of the referenced page).
-* If the text overfull the page (slide) then it follows to the next page without
- saying explicitly `\pg;`. But `\slideshow` cannot work in this case.\pg+
-* If `\slideshow` then each part of page between two `\pg`'s or between
- `\slideshow` and the first `\pg` is processed in a local group.
-* If not `\slideshow` then the document is not separated to groups.
- This can lead to different results. So, you can put `\slideopen` command
- instead of `\slideshow`. Then local groups are opened exactly as when
- `\slideshow` is used but `\slideshow` is not activated. Example:
-
-\begtt
-\slides
-\def\foo...{...} % global definitions.
-%\slideshow % printing version, no slide show.
-\slideopen % opens group for first page.
-... first page
-\pg; % closes group and opens group for second page.
-... second page
-\pg. % closes group of the last page.
-\endtt
-
-\pg; %------------------------------------------------------------------
-
-\sec More about design
-
-* You can use `\backgroundpic{<image-file>}` for putting an image to the background.
-* You can re-declare `\footline` or re-define internal macros for design as
- you wish.
-* The TeXGyre Heros font is used as default text font, the FiraMath is used
- for math.
-* If you want to use another text font fmaily, use `\fontfam`
- {\em before} `\slides` command.
-* If you want to use different math font, use
- `\loadmath{[font]}` before `\fontfam` (if used) and before `\slides`. For example:
-
-\begtt
-\loadmath{[Asana-Math]} % Math font: Asana
-\fontfam[Termes] % Text font: Termes
-\slides
-...
-\endtt
-
-* You can put the images or text wherever using `\putimege` or `\puttext`
- macros...
-
-\pg; %------------------------------------------------------------------
-
-\sec Putting images and texts wherever
-
-* `\puttext <right> <up> {<text>}` puts a <text> to the desired place:
- It moves the current point <right> and <up>, puts the <text> and returns
- back, so the typesetting continues from previous position. The parameters
- <right> and <up> are dimensions. For example
-
-\begtt
-\puttext 0mm 50mm {\Red HELLO}
-\endtt
-
- \puttext 0mm 50mm {\Red HELLO}
- prints red HELLO, as shown here.\pg+
-
-* `\putpic <right> <up> <width> <height> {<image-file>}`
- puts the image with desired <width> and <height> at the position like
- `\puttext` puts the text.
-
- \putpic .8\hsize 20mm 30mm \nospec {op-ring.png}
-* The ring above is the result of
-
-\begtt
-\putpic .8\hsize 20mm 30mm \nospec {op-ring.png}
-\endtt
- %
- used at beginning of this paragraph.\pg+
-* Use `\nospec` for <width> or <height> of the image if you don't want to specify both
- dimensions (because you don't want to change the image aspect ratio).
-
-\pg; %------------------------------------------------------------------
-
-\sec Limits of the \code{\\pg+} sequence
-
-* The \code{\\pg+} sequence (partially uncovering ideas) cannot be used inside
- a~group.
-* The exception is the nested environment `\begitems...\enditems`.
-* The `\pg+` always finalizes the current paragraph.
- It is impossible to hide only a part of the horizontal mode.\pg+
-
-\sec The \code{\\layers}\,...\code{\\endlayers} environment
-
-If you really need something unsupported by `\pg+` then you can use
-
-\begtt \catcode`\<=13
-\layers <number>
-<layered text>
-\endlayers
-\endtt
-
-* The <layered text> should include conditions like
- `\ifnum\layernum...` or `\ifcase\layernum`.
- It is printed <number> times to more slide pages (layers) with the same
- surrounding text. See next page...
-
-\pg; %------------------------------------------------------------------
-
-\sec Example of \code{\\layers} environment
-
-The `\slides` style provides a shortcut `\use` and a macro `\pshow` (means
-partially show):
-
-\begtt
-\def\use#1#2{\ifnum\layernum#1\relax#2\fi}
-\def\pshow#1{\use{=#1}\Red \use{<#1}\Transparent \ignorespaces}
-\endtt
-`\use{=3}{do something}` does something only if `\layernum=3`.
-
-The `{\pshow<num> <text>}` prints <text> in Red when current layer is equal
-to <num> or it prints <text> normally when current layers is greater than <num>.
-The transparent (invisible) text is used in other cases.
-
-The following dance:
-\layers 3
-{\pshow2 Second text.} {\pshow3 Third text.} {\pshow1 First text.}
-\endlayers
-\pg+
-
-was generated by
-
-\begtt
-\layers 3
-{\pshow2 Second text.} {\pshow3 Third text.} {\pshow1 First text.}
-\endlayers
-\endtt
-
-\pg+
-* The <layered text> is treated as a macro parameter. So, you cannot use verbatim
- nor `\sec` titles here. Maximal one `\layers` environment can be per one
- page (terminated by `\pg+` or `\pg;` or `\pg.`
-
-\pg; %------------------------------------------------------------------
-
-\sec Comparison \OpTeX/ slides with Beamer\fnote{\url{http://www.ctan.org/pkg/beamer}}
-
-The \LaTeX{} package {\bf\Blue Beamer} gives much more features and many themes
-are prepared for Beamer, {\bf\Red but}
-\pg+
-* the user of Beamer is forced to {\em program} his/her document using
- dozens of \code{\\begin{foo}} and \code{\\end{foo}} and many another
- programming constructions,\pg+
-* plain \TeX{} gives you a possibility to simply
- {\em write} your document with minimal markup. The result is more compact.
- You can concentrate on the contents of your document, not on the
- programming syntax.\pg+
-* User needs to read 250 pages of doc for understanding Beamer,\pg+
-* on the other hand, you need to read only eleven
- slides\fnote{this twelfth slide isn't counted}
- and you are ready to use {\bf\Blue\OpTeX/ slides}.
-
-\pg; %------------------------------------------------------------------
-
-\null
-\vskip2cm
-\centerline{\typosize[35/40]\bf Thanks for your attention}\pg+
-
-\vskip2cm
-\centerline{\Blue\typosize[60/70]\bf Questions?}
-
-\pg. %----------------------------- THE END ----------------------------
-