NAME

       vprerex - graphical front-end and viewer for the prerex(1) prerequisite-chart editor

SYNOPSIS

       vprerex basefile[.tex] [ chartfile[.tex] ]

       vprerex file.pdf

       vprerex

DESCRIPTION

       vprerex (visual prerex) is a GUI front-end and viewer for the prerex(1) interactive editor
       of prerequisite-chart descriptions in the prerex(5) format.  The viewer may be  used  just
       as  a minimalistic viewer of arbitrary PDF files  but supports editing of charts generated
       using prerex.sty(7) by allowing coordinates of course boxes, arrows, and background points
       to be conveyed back to the prerex(1) command-line using the clipboard.

USAGE

       If vprerex is invoked on a PDF file, it simply displays that file.

       If  the  (first) argument does not have the .pdf suffix, it is assumed to be the base file
       for a LaTeX document containing a prerequisite-chart description in prerex(5)  format,  to
       be  edited  using  prerex(1).   If  a  second  argument  is supplied, it is regarded as an
       included file containing the specific chart environment to be edited.

       If no arguments are supplied, a file-opening  dialog  allows  the  user  the  specify  the
       prerex(1)  base  file to be edited (or the PDF file to be viewed); if a separate chartfile
       is needed, vprerex(1) must be invoked wth two arguments on the command line.

       If the mouse hovers over a hyperlink in the PDF viewing  window,  the  cursor  shape  will
       change to a pointing finger and a tooltip will display the URI.  If the PDF file displayed
       contains a chart generated using prerex.sty(7) and the background coordinate grid has been
       enabled,  left-clicking  the  mouse  on a course box, arrow mid-point, or background point
       will load the relevant coordinates into the X clipboard.  The cursor shape  changes  to  a
       plus-sign to indicate successful capture of the coordinates.  Middle-clicking the mouse at
       the prerex(1) command-line  will  then  paste  those  coordinates  into  a  command  being
       composed.  If the chart file is regenerated, the updated document will be re-loaded.

DEPENDENCIES

       vprerex  is  based  on  the  Qt-4 library. It calls xterm(1) and prerex(1) for the editing
       window and uses poppler-qt4 for rendering PDF files.

AUTHOR

       R. D. Tennent (rdt@cs.queensu.ca), adapted from David Boddie's PDFviewer, described in the
       QT Quarterly: http://doc.trolltech.com/qq/QtQuarterly27.pdf.

SEE ALSO

       prerex(1), prerex(5), prerex.sty(7), and xterm(1).