147 lines
5 KiB
Scheme
147 lines
5 KiB
Scheme
;; -*- mode: scheme -*-
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;;
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;; x a u e n e u a x - nqdataflow
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;;
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;; copyright (C) 2004 FoAM vzw
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;; You are granted the rights to distribute and use this software
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;; under the terms of the GNU Lesser General Public License as
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;; published by the Free Software Foundation; either version 2.1 of
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;; the License, or (at your option] any later version. The LGPL is
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;; distributed with this code (see: LICENCE) and available online
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;; at http://www.gnu.org/copyleft/lesser.html
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;; authors
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;; - nik gaffney <nik@fo.am>
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;; requirements
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;; - uses qfwfq for layout and slipping between
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;; commentary
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;; a simple dataflow like visual wrapper to the underlying scheme,
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;; using an evaluation model which is not quite dataflow, yet not
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;; quite scheme -> nqdataflow
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;;
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;; keyboard controls
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;; C-n - adds new node, connected to a selected node
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;; C-c - connects 2 selected nodes
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;; C-d - disconnects selected node
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;; C-l - autolayout from selcted node
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;; delete - deletes node
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;; enter - evaluates current node
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;; to do
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;; - deal with evaluation order display
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;; - check directions of node connection with 'C-c'
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;; - multiple connections -> clarify
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;; - deal with circularity
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;; changes
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;; 2006-09-11
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;; - scraped into coherence from various sources
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(require "qfwfq.scm")
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(define xauen-pasteboard%
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(class graph-pasteboard%
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;; should probably figure out how keymaps work,.
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(define/override (on-char event)
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(temp-keymap event)
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(super on-char event))
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(define/override (do-paste time)
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(super do-paste time))
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(super-new)))
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;; setup frame and windows..
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(define f (new frame% [label " } x a u e n e u a x { "]))
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(define mb (instantiate menu-bar% (f)))
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(define edit-menu (instantiate menu% ("Edit" mb)))
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(define font-menu (instantiate menu% ("Font" mb)))
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(append-editor-operation-menu-items edit-menu)
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(append-editor-font-menu-items font-menu)
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(define p (new xauen-pasteboard%))
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(define ec (new editor-canvas% (parent f)))
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(send ec min-client-width 450)
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(send ec min-client-height 450)
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(send ec set-editor p)
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(define dc (send ec get-dc))
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;; text input callback - spit and polish
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;; beware hardcoded node & pasteboard & lack of error checking
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(define (parse-text-input tf event)
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(if (eqv? (send event get-event-type) 'text-field-enter)
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(let ([input (read-from-string (send tf get-value))]
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[node n1]
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[pasteboard p])
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(draw-parse-tree input 1 1 node pasteboard)
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(eval-tree node)
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;(set-node-text node (eval input))
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;(shadowpi-tree n1 p 0 50))))
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(circles-tree n1 p 100 100 0 6.28 10))))
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;; textmode input,. .
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(define input (new text-field%
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[label "inslkon >"] [parent f] [callback parse-text-input]
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[init-value "(* 3 4 5 (* 7 (+ 1 1 1) 9))"]))
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;; keyboard overloading..,
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(define (temp-keymap event)
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(let* ([target p] ;; should get dynamically pasteboard..,
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[key (send event get-key-code)]
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[selected-snip (send target find-next-selected-snip #f)]
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[Gx (send event get-x)]
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[Gy (send event get-y)])
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(let-values ([(x y) (send target editor-location-to-dc-location Gx Gy)])
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(debug 3 "key[de]maping->key: ~a ~%" key)
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(debug 1 "selected-snip: ~a ~%" selected-snip)
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(if (send event get-control-down)
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(case key
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[(#\n) ;; C-n fr 'new'
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(debug 1 "add: ~a" key)
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(let ([node (make-node-snip)])
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(send target insert node)
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(if selected-snip
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(begin (add-links node selected-snip)
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;; re.colour the tree, first [grand]child should do...
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(colour-tree (car (send selected-snip get-children)) p)))
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(send target move-to node x y)
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)]
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[(#\c) ;; C-c fr 'connect'
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(let ([next (send target find-next-selected-snip selected-snip)])
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(debug 1 "next-snip: ~a ~%" next)
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(add-links selected-snip next))]
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[(#\d) ;; C-d fr 'disconnect'
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(let ([next (send target find-next-selected-snip selected-snip)])
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(send selected-snip remove-child next)
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(send selected-snip remove-parent next)
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(send next remove-parent selected-snip)
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(send next remove-child selected-snip))]
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[(#\z) ;; C-z re.colour
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(colour-tree selected-snip p)]
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[(#\l) ;; C-l re.lapse -> splay
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(shadowpi-tree selected-snip p 0 63)]
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[(#\e) ;; C-e encapsulate the selection
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(encapsulate (selected-snips p) p)]
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[(#\=) ;; C-= zoom->out
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(send p zoom 1.1)]
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[(#\-) ;; C-- zoom->in
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(send p zoom 0.9)]
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)))))
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;; basic nodewrenching
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(define n1 (new output-snip%))
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(send p insert n1)
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(send p move-to n1 15 15)
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;; test a recursive node
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;(define r1 (new recursive-snip%))
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;(send p insert r1)
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;(define n2 (new output-snip%))
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;(send r1 insert n1)
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(send f show #t)
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