vprerex - graphical front-end and viewer for the prerex(1) prerequisite-chart editor
vprerex basefile[.tex] [ chartfile[.tex] ]
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.
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.