Difference between revisions of "Thumb index"
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The following code is an example of how to draw a graphic on every page of a document. The graphic (a grey rectangle) appears in a different place for each chapter, and the chapter number appears in the rectangle as well. This is often called a thumb index - your thumb can flip the pages of a book while you watch the contents flash past... | The following code is an example of how to draw a graphic on every page of a document. The graphic (a grey rectangle) appears in a different place for each chapter, and the chapter number appears in the rectangle as well. This is often called a thumb index - your thumb can flip the pages of a book while you watch the contents flash past... | ||
− | |||
− | |||
− | \ | + | <context source="yes"> |
+ | % these first lines are just for wiki layout and visualisation | ||
+ | \setuppapersize[A8][A5,landscape] \showframe | ||
+ | \setuppaper[nx=4,ny=2] | ||
+ | \setuparranging[XY] | ||
+ | \usemodule[visual] | ||
+ | |||
+ | \def\currentchapternumber | ||
+ | {\somenamedheadnumber{chapter}{current}} | ||
+ | |||
+ | \def\lastchapternumber | ||
+ | {\somenamedheadnumber{chapter}{last}} | ||
\setuppagenumbering | \setuppagenumbering | ||
[alternative=doublesided] | [alternative=doublesided] | ||
− | |||
− | |||
− | |||
\setupbackgrounds | \setupbackgrounds | ||
Line 20: | Line 27: | ||
[\setups{thumbs}] | [\setups{thumbs}] | ||
− | \ | + | \newdimen\thumbheight |
\startsetups thumbs | \startsetups thumbs | ||
− | + | \ifnum \lastchapternumber > 0 | |
− | + | \thumbheight=\dimexpr\paperheight/\lastchapternumber\relax | |
− | + | \fi | |
\vbox to \paperheight \bgroup | \vbox to \paperheight \bgroup | ||
− | \vskip \ | + | \vskip \currentchapternumber \thumbheight |
− | \vskip -1 | + | \vskip -1 \thumbheight |
\doifoddpageelse\hfill\donothing | \doifoddpageelse\hfill\donothing | ||
\framed | \framed | ||
[background=color, | [background=color, | ||
− | backgroundcolor= | + | backgroundcolor=blue, |
frame=off, | frame=off, | ||
foregroundcolor=white, | foregroundcolor=white, | ||
− | height=\ | + | height=\thumbheight, |
− | {\bfa \ | + | width=5mm] |
+ | {\bfa \currentchapternumber} | ||
\doifoddpageelse\donothing\hfill | \doifoddpageelse\donothing\hfill | ||
\vss | \vss | ||
Line 45: | Line 53: | ||
\starttext | \starttext | ||
− | \ | + | \dorecurse{4} |
− | \chapter{ | + | {\chapter{\fakewords{1}{5}} |
− | + | \fakewords{50}{100}} | |
− | \ | ||
\stoptext | \stoptext | ||
− | </ | + | </context> |
+ | |||
+ | == Another Example == | ||
+ | An example (MkIV) for using Metapost to create thumb indices for chapters. | ||
+ | |||
+ | <context source="yes"> | ||
+ | % these first lines are just for wiki layout and visualisation | ||
+ | \setuppapersize[A8][A4] \showframe | ||
+ | \setuppaper[nx=4,ny=4] | ||
+ | \setuparranging[XY] | ||
+ | \usemodule[visual] | ||
+ | |||
+ | \setuplayout | ||
+ | [width=middle, | ||
+ | % margin=\dimexpr\backspace-\margindistance\relax | ||
+ | location=middle] | ||
+ | |||
+ | \definecolor[chap_frame][g=1,t=1,a=12] | ||
+ | \definecolor[sect_frame][b=1,t=1,a=12] | ||
+ | \definecolor[textcolor] [r=1,t=1,a=12] | ||
+ | |||
+ | \startuseMPgraphic{chapter thumb} | ||
+ | path chap_frame, sect_frame ; pair pos,a,b ; picture text ; | ||
+ | |||
+ | if \somenamedheadnumber{chapter}{current} > 0 : | ||
+ | curr_chap := \somenamedheadnumber{chapter}{current} ; | ||
+ | else : | ||
+ | curr_chap := 1 ; | ||
+ | fi; | ||
+ | if \somenamedheadnumber{chapter}{last} > 0 : | ||
+ | last_chap := \somenamedheadnumber{chapter}{last} ; | ||
+ | else : | ||
+ | last_chap := 1 ; | ||
+ | fi; | ||
+ | if \somenamedheadnumber{section}{current} > 0 : | ||
+ | curr_sect := \somenamedheadnumber{section}{current} ; | ||
+ | else: | ||
+ | curr_sect := 1 ; | ||
+ | fi; | ||
+ | if \somenamedheadnumber{section}{last} > 0 : | ||
+ | last_sect := \somenamedheadnumber{section}{last}; | ||
+ | else: | ||
+ | last_sect := 1; | ||
+ | fi; | ||
+ | |||
+ | skip := TextHeight * (curr_chap-1)/last_chap ; | ||
+ | height := TextHeight/last_chap ; | ||
+ | sskip := height*curr_sect/last_sect ; | ||
+ | |||
+ | text := textext("\ssbfb\textcolor Chapter\enspace\getmarking[chapternumber]"); | ||
+ | |||
+ | StartPage ; | ||
+ | chap_frame := fullsquare xyscaled(RightMarginWidth,height) ; | ||
+ | |||
+ | a := ulcorner chap_frame ; | ||
+ | b := urcorner chap_frame ; | ||
+ | |||
+ | sect_frame := a--b--(xpart b,ypart b-sskip)--(xpart a,ypart a-sskip)--cycle; | ||
+ | |||
+ | pos := urcorner Field[Text][RightMarginSeparator] - | ||
+ | ulcorner chap_frame - (0,skip); | ||
+ | |||
+ | fill chap_frame shifted pos withcolor \MPcolor{chap_frame}; | ||
+ | unfill sect_frame shifted pos withcolor white ; | ||
+ | fill sect_frame shifted pos withcolor \MPcolor{sect_frame}; | ||
+ | draw text rotated 90 shifted pos ; | ||
+ | StopPage ; | ||
+ | \stopuseMPgraphic | ||
+ | |||
+ | |||
+ | \defineoverlay[chapter thumb][\useMPgraphic{chapter thumb}] | ||
+ | |||
+ | \setupbackgrounds[page][background=chapter thumb] | ||
+ | |||
+ | |||
+ | \starttext \showframe | ||
+ | \dorecurse{3}{\chapter{Test Chapter #1} | ||
+ | Chapter \someheadnumber[chapter][current] of | ||
+ | \someheadnumber[chapter][last] | ||
+ | \dorecurse{9}{\section{Test Section} | ||
+ | Section \someheadnumber[section][current] of | ||
+ | \someheadnumber[section][last] \blank | ||
+ | \fakewords{10}{20} \par | ||
+ | } | ||
+ | } | ||
+ | \stoptext | ||
+ | </context> | ||
+ | |||
+ | [[Category:Sample documents]] | ||
+ | [[Category:Graphics]] |
Latest revision as of 08:39, 20 July 2022
The following code is an example of how to draw a graphic on every page of a document. The graphic (a grey rectangle) appears in a different place for each chapter, and the chapter number appears in the rectangle as well. This is often called a thumb index - your thumb can flip the pages of a book while you watch the contents flash past...
% these first lines are just for wiki layout and visualisation \setuppapersize[A8][A5,landscape] \showframe \setuppaper[nx=4,ny=2] \setuparranging[XY] \usemodule[visual] \def\currentchapternumber {\somenamedheadnumber{chapter}{current}} \def\lastchapternumber {\somenamedheadnumber{chapter}{last}} \setuppagenumbering [alternative=doublesided] \setupbackgrounds [page] [background=thumbs] \defineoverlay [thumbs] [\setups{thumbs}] \newdimen\thumbheight \startsetups thumbs \ifnum \lastchapternumber > 0 \thumbheight=\dimexpr\paperheight/\lastchapternumber\relax \fi \vbox to \paperheight \bgroup \vskip \currentchapternumber \thumbheight \vskip -1 \thumbheight \doifoddpageelse\hfill\donothing \framed [background=color, backgroundcolor=blue, frame=off, foregroundcolor=white, height=\thumbheight, width=5mm] {\bfa \currentchapternumber} \doifoddpageelse\donothing\hfill \vss \egroup \stopsetups \starttext \dorecurse{4} {\chapter{\fakewords{1}{5}} \fakewords{50}{100}} \stoptext
Another Example
An example (MkIV) for using Metapost to create thumb indices for chapters.
% these first lines are just for wiki layout and visualisation \setuppapersize[A8][A4] \showframe \setuppaper[nx=4,ny=4] \setuparranging[XY] \usemodule[visual] \setuplayout [width=middle, % margin=\dimexpr\backspace-\margindistance\relax location=middle] \definecolor[chap_frame][g=1,t=1,a=12] \definecolor[sect_frame][b=1,t=1,a=12] \definecolor[textcolor] [r=1,t=1,a=12] \startuseMPgraphic{chapter thumb} path chap_frame, sect_frame ; pair pos,a,b ; picture text ; if \somenamedheadnumber{chapter}{current} > 0 : curr_chap := \somenamedheadnumber{chapter}{current} ; else : curr_chap := 1 ; fi; if \somenamedheadnumber{chapter}{last} > 0 : last_chap := \somenamedheadnumber{chapter}{last} ; else : last_chap := 1 ; fi; if \somenamedheadnumber{section}{current} > 0 : curr_sect := \somenamedheadnumber{section}{current} ; else: curr_sect := 1 ; fi; if \somenamedheadnumber{section}{last} > 0 : last_sect := \somenamedheadnumber{section}{last}; else: last_sect := 1; fi; skip := TextHeight * (curr_chap-1)/last_chap ; height := TextHeight/last_chap ; sskip := height*curr_sect/last_sect ; text := textext("\ssbfb\textcolor Chapter\enspace\getmarking[chapternumber]"); StartPage ; chap_frame := fullsquare xyscaled(RightMarginWidth,height) ; a := ulcorner chap_frame ; b := urcorner chap_frame ; sect_frame := a--b--(xpart b,ypart b-sskip)--(xpart a,ypart a-sskip)--cycle; pos := urcorner Field[Text][RightMarginSeparator] - ulcorner chap_frame - (0,skip); fill chap_frame shifted pos withcolor \MPcolor{chap_frame}; unfill sect_frame shifted pos withcolor white ; fill sect_frame shifted pos withcolor \MPcolor{sect_frame}; draw text rotated 90 shifted pos ; StopPage ; \stopuseMPgraphic \defineoverlay[chapter thumb][\useMPgraphic{chapter thumb}] \setupbackgrounds[page][background=chapter thumb] \starttext \showframe \dorecurse{3}{\chapter{Test Chapter #1} Chapter \someheadnumber[chapter][current] of \someheadnumber[chapter][last] \dorecurse{9}{\section{Test Section} Section \someheadnumber[section][current] of \someheadnumber[section][last] \blank \fakewords{10}{20} \par } } \stoptext