Plus42 Equations, Preview Release

[Thomas Okken]

New update:

Just a few minor things...

1. In the desktop versions, added key mappings for the former top row, to allow pressing the shifted functions as Shift-then-A etc., in addition to Shift-A etc. For the standard keys, this is default behavior, but with direct command mapping, it had to be made explicit.
2. The way the result of evaluating parameter-less expressions was displayed in the equation editor didn't work very well with 2-line displays. Made it a bit smarter.
3. When printing a plot using the Plot Viewer, the output now includes the axis limits.
4. Copy Print-Out As Text now handles the images generated by PRLCD when it prints sideways.
5. Changed the search order for global labels. They are now always searched for starting in the current directory, followed by the current directory's ancestors, all the way until HOME; followed by the directories in PATH; and finally, in running programs, by the directory where the currently running code resides, followed by that directory's ancestors.
Searching the current directory before the program's own directory may seem wrong, but it is necessary in order to allow programs to function that call back to user-provided programs (i.e. programs like DPLOT, or anything using PGMMENU). And this also applies to programs called by SOLVE, INTEG, and the new PLOT function.