navigation map

  1: Introduction
  2: Simple example
  3: Invocation
  4: Finer Control
  5: X-Y Plots
  6: Contour Plots
  7: Image Plots
  8: Examples
  9: Gri Commands
  10: Programming
  11: Environment
  12: Emacs Mode
  13: History
  14: Installation
  15: Gri Bugs
  16: Test Suite
  17: Gri in Press
  18: Acknowledgments
  19: License

index.html#Top Emacs.html#EmacsMode Gri: Emacs editing mode Gri Mode: Screenshots index.html#Top Gri Mode: Screenshots

12.1: About Gri Mode

Gri mode has all the wonderful things you've come to expect from Emacs modes. Here's a brief overview of the features:
  • It can complete partially typed commands, builtin variables and synonyms (`gri-complete', `M-Tab') and help you edit the syntax that was thus inserted for you (`gri-option-select', `C-c C-o'; `gri-option-kill', `C-c C-k').
  • It can provide a short help synopsis concerning the command on the current line (`gri-help-this-command', `C-c C-h'), or load the info manual for that command (`gri-info-this-command', `C-c C-i'). It knows the list of all Gri commands, and can provide help or info regarding any of them (`gri-help', `C-c M-h'; `gri-info', `C-c M-i') using command name completion at the prompt (`Tab').
  • All Gri commands are listed in a pull-down menu from the menubar, which you can use to either enter the text of the selected command, or obtain help or info about it.
  • It can help you find an unknown command by listing all containing a given word (`gri-apropos', `C-c C-a').
  • It fontifies your Gri code using colour coding.
  • It indents if statements, loops, and so on (`gri-indent-line', `Tab').
  • It can let you run Gri and view its output without leaving the editor (`gri-run', `C-c C-r'). If an error is encountered, Emacs will rearrange the buffer so the cursor is on the bad line of the Gri command-file.
  • If you've already run Gri, and therefore have a PostScript output file, the mode will let you view that file (`gri-view', `C-c C-v') even if that file is compressed.

Thus one never has to leave Emacs; type `C-c C-r' to run Gri, and if there is no error, the graph comes up automatically. If there was an error, gri-mode will move editing point to the line with the error and display the error message. Given that the mode can complete partially typed commands, this means a substantial saving in development time.

Inside gri-mode, type `C-h m' for help on the mode, including a list of all commands and key definitions.

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