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%D \module
%D [ file=scrn-hlp,
%D version=1998.10.10,
%D title=\CONTEXT\ Screen Macros,
%D subtitle=Help (Experimental),
%D author={Hans Hagen \& Ton Otten},
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
% todo : dedicated vide/hide voor helps
\writestatus{loading}{ConTeXt Screen Macros / Help popups}
%D This is an experimental and private module, so the interface
%D and functionality can change. Pieces of code will be moved
%D to other modules. More features are possible but will be
%D interfaces later. See m-chart for an application as well
%D as the second tno-tpd manual (graphic in margin, click
%D on it, pop up big one, use menu with hides, as well as
%D background, etc. etc.
\unprotect
\defineframedtext
[\v!helptext]
\setupframedtexts
[\v!helptext]
[\c!width=.75\textwidth,
\c!align=\v!normal,
\c!frame=\v!off,
\c!background=\v!screen]
\newcounter \nofhelpdataentries
\newconditional \somehelpdatadefined
\appendtoks \getpagehelpdata \to \beforeeverypage
\appendtoks \synchronizepagehelpdata \to \aftereverypage
% will be proper state variable
\let\pagehelpdata\empty
\def\dontresetpagedata
{\let\synchronizepagehelpdata\relax}
\def\resetpagehelpdata
{\iflocation
\let\synchronizepagehelpdata\resetpagehelpdata
\global\let\pagehelpdata\empty
\resetreference[HideHelp]%
\fi}
\let\synchronizepagehelpdata\resetpagehelpdata
\resetreference[HideHelp]
\def\getpagehelpdata
{\iflocation\ifcase\nofhelpdataentries\else
\let\pagehelpdata\empty
\ifconditional\somehelpdatadefined
\definetwopasslist{hlp:\realfolio}%
\doloop
{\gettwopassdata{hlp:\realfolio}%
\iftwopassdatafound
\addtocommalist\twopassdata\pagehelpdata
\else
\exitloop
\fi}%
\fi
\ifx\pagehelpdata\empty \else
\useJSscripts[fld]%
\definereference[HideHelp][JS(Hide_Fields)]% for the moment
\fi
\fi\fi}
\def\setpagehelpdata[#1]%
{\iflocation\expanded{\dosetpagehelpdata{#1}}\fi}
\def\dosetpagehelpdata#1%
{\doglobal\increment\nofhelpdataentries
\savetwopassdata{hlp:\realfolio}{\nofhelpdataentries}{#1}}
\setvalue{\e!start\v!helptext}[#1]%
{\iflocation
\global\settrue\somehelpdatadefined
\setvalue{\e!stop\v!helptext}%
%{\definesymbol[helpinfo:#1][{\doframedtext[\v!helptext]{\getbuffer[\v!helptext]}}]%
% \dopresetfieldsymbol{helpinfo:#1}}%
{\definesymbol[\v!helptext:#1][{\doframedtext[\v!helptext]{\getbuffer[\v!helptext]}}]%
\dopresetfieldsymbol{\v!helptext:#1}}%
\else
\letvalue{\e!stop\v!helptext}\relax
\fi
\dostartbuffer[\v!helptext][\e!start\v!helptext][\e!stop\v!helptext]}
\long\def\helptext[#1]#2%
{\iflocation
\global\settrue\somehelpdatadefined
%\definesymbol[helpinfo:#1][{\doframedtext[\v!helptext]{#2}}]%
%\dopresetfieldsymbol{helpinfo:#1}%
\definesymbol[\v!helptext:#1][{\doframedtext[\v!helptext]{#2}}]%
\dopresetfieldsymbol{\v!helptext:#1}%
\fi}
\let\definehelptext\helptext % for backward compabilities sake
\def\dohelpdata#1%
{\setbox\scratchbox\hbox
{\startoverlay
{\box\scratchbox}
%{\definemainfield[help:#1][check][helpsetup][helpinfo:#1][helpinfo:#1]%
{\definemainfield[help:#1][check][helpsetup][\v!helptext:#1][\v!helptext:#1]%
\fitfield[help:#1]}
\stopoverlay}}
\def\helpdata
{\iflocation
\bgroup
%\getpagehelpdata
\ifx\pagehelpdata\empty \else
\setupfields[\v!reset]%
\setupfield
[helpsetup]
[\c!width=\v!fit,
\c!height=\v!fit,
\c!frame=\v!off,
\c!clickin=JS(Hide_Fields),
\c!option={\v!readonly,\v!hidden}]%
\setbox\scratchbox\emptybox
\processcommacommand[\pagehelpdata]\dohelpdata
\box\scratchbox
\fi
\egroup
\fi}
\def\helpbutton % also gobble spaces between [][]
{\dodoubleempty\dohelpbutton}
\def\dohelpbutton
{\ifsecondargument
\expandafter\donohelpbutton
\else
\expandafter\dodohelpbutton
\fi}
\def\dodohelpbutton[#1][#2]#3[#4]% #2 is space gobbling dummy
{\iflocation
\setpagehelpdata[#4]%
\useJSscripts[fld]%
\button[#1]{#3}[JS(Vide_Hide_Fields{help:#4})]%
\fi}
\def\donohelpbutton[#1][#2]%
{\dodohelpbutton[#1][]{}[#2]}
\def\doifhelpinfo#1#2%
{\iflocation
\doifsymboldefinedelse{helpinfo:#1}{#2}\donothing
\fi}
\def\doifelsehelpinfo#1#2#3%
{\iflocation
\doifsymboldefinedelse{helpinfo:#1}{#2}{#3}%
\fi}
\protect \endinput
|
