├── LICENSE ├── README.md ├── cooper ├── buttons.rkt ├── cooper.rkt ├── draw.rkt ├── explore.rkt ├── fstruct.rkt └── main.rkt ├── info.rkt └── mystack.rktd /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Cooper 2 | 3 | 4 | 5 | A primitive [Racket](http://racket-lang.org) 6 | [HyperCard](http://www.loper-os.org/?p=568) clone, sort of. 7 | 8 | Create a stack consisting of cards with drawings and buttons on 9 | them. Write code to run when buttons get clicked. Explore through the 10 | stacks you've created. 11 | 12 | ## Modes 13 | 14 | Right-click to change modes. 15 | 16 | * explore (hand) 17 | * buttons (crosshair) 18 | * drawing (bullseye) 19 | 20 | Buttons are invisible unless you're in "buttons" mode. Double-clicking 21 | on a button gives you edit mode, where you can either give the button 22 | a target card or write a function that takes the state and can return 23 | a modification of it. Buttons only run the code if their action is set 24 | to ``, otherwise they only jump to the specified card. 25 | 26 | Drawing is only straight lines for now. 27 | 28 | Card Zero is where you start; it's a card that gets prepopulated with 29 | a self-hosted card listing/editing interface. 30 | 31 | ## Keys 32 | 33 | If you get lost at any point, control-0 will return you to card zero. 34 | 35 | Control-s saves, and control-l loads. 36 | 37 | Control-c clears background, control-b clears buttons, control-n creates cards. 38 | 39 | ## Implementation 40 | 41 | See `cooper/cooper.rkt` for an overview of the structs used and the 42 | contracts on their fields. State is tracked with the `state` struct 43 | inside a `box`. Each mode defines a number of callback functions for 44 | various event handling. Handlers take the current state (along with 45 | event and canvas objects) and return a modified state. 46 | 47 | Cards can have event handler functions attached to them. The card 48 | listing is implemented on the `zero` card, which comes pre-populated 49 | with an `"enter"` event handler that creates buttons pointing to all 50 | the cards in the stack. 51 | 52 | ## License 53 | 54 | Copyright © 2014 Phil Hagelberg and contributors 55 | 56 | Image above © 2014 Boom Entertainment, Inc. 57 | 58 | Distributed under the GNU General Public License version 3; see file LICENSE. 59 | -------------------------------------------------------------------------------- /cooper/buttons.rkt: -------------------------------------------------------------------------------- 1 | #lang racket/gui 2 | 3 | (require "cooper.rkt") 4 | 5 | (provide buttons-mode render-button) 6 | 7 | 8 | ;;; editor 9 | 10 | (define (editor-frame% sem) 11 | (class frame% 12 | (super-new) 13 | (define (on-close) 14 | (semaphore-post sem)) 15 | (augment on-close))) 16 | 17 | (define (button-callback frame success? ok? _button _event) 18 | (set-box! success? ok?) 19 | (send frame on-close) 20 | (send frame show #f)) 21 | 22 | ;; TODO: editor only enabled when code is selected 23 | (define (choices-callback editor action choice _event) 24 | (set-box! action (send choice get-string-selection))) 25 | 26 | (define (blocker sem) 27 | (when (not (semaphore-try-wait? sem)) 28 | (sleep/yield 0.1) 29 | (blocker sem))) 30 | 31 | (define (edit-window button stack) 32 | (let* ([sem (make-semaphore 0)] 33 | [success? (box #f)] 34 | [action (box (button-action button))] 35 | [editor (new text%)] 36 | ;; TODO: this swallows newlines somehow 37 | [snip (make-object string-snip% (button-code button))] 38 | [frame (new (editor-frame% sem) [label "Button Edit"] 39 | [width 500] [height 500])] 40 | [vpane (new vertical-pane% [parent frame])] 41 | [canvas (new (class editor-canvas% 42 | (define/override (on-char event) 43 | (cond [(equal? 'escape (send event get-key-code)) 44 | (button-callback frame success? #f '() '())] 45 | [(and (equal? #\return (send event get-key-code)) 46 | (send event get-control-down)) 47 | (button-callback frame success? #t '() '())] 48 | [else (super on-char event)])) 49 | (super-new)) 50 | [parent vpane])] 51 | [hpane (new horizontal-pane% [parent frame] 52 | [stretchable-height false])] 53 | [possible-actions (cons "" (dict-keys (stack-cards stack)))] 54 | [choices (new choice% [parent hpane] [label "Action:"] 55 | [choices possible-actions] 56 | [selection (or (index-of possible-actions (unbox action)) 0)] 57 | [callback (curry choices-callback editor action)])] 58 | [cancel (new button% [label "Cancel"] [parent hpane] 59 | [callback (curry button-callback frame success? #f)])] 60 | [ok (new button% [label "OK"] [parent hpane] 61 | [callback (curry button-callback frame success? #t)])] 62 | [delete (new button% [label "Delete"] [parent hpane] 63 | [callback (curry button-callback frame success? 'delete)])] 64 | [mb (new menu-bar% [parent frame])] 65 | [m-edit (new menu% [label "Edit"] [parent mb])] 66 | [style (make-object style-delta% 'change-family 'modern)]) 67 | (send editor change-style style 'start 'end) 68 | (append-editor-operation-menu-items m-edit #t) 69 | (send canvas set-editor editor) 70 | ;; TODO: visible/name 71 | (send frame show #t) 72 | (send editor insert snip) 73 | (blocker sem) ; probably a better way to do this 74 | (match (unbox success?) 75 | [#f button] 76 | ['delete #f] 77 | [_ (let* ([action (if (equal? "" (unbox action)) 78 | 'code 79 | (unbox action))] 80 | [new-button (button 'action action)]) 81 | (new-button 'code (send editor get-flattened-text)))]))) 82 | 83 | (define (try-code-action input) 84 | (with-handlers ([exn:fail? (lambda (exn) 85 | (message-box "Problem with code" 86 | (exn-message exn) 87 | false '(ok stop)) 88 | false)]) 89 | (let ([code (eval (read (open-input-string input)))]) 90 | (if (procedure? code) 91 | code 92 | (error "needs to be a procedure"))))) 93 | 94 | ;; returns an updated button 95 | (define (button-edit state target-button) 96 | (let ([new-button (edit-window target-button (state-stack state))]) 97 | (if new-button 98 | (dict-update-in state `(stack cards ,(state-card state) buttons) 99 | replace target-button new-button) 100 | (dict-update-in state `(stack cards ,(state-card state) buttons) 101 | (curry remove target-button))))) 102 | 103 | 104 | ;;; click handlers 105 | 106 | (define double-click-threshold 500) 107 | 108 | (define (double-click? mouse last-mouse) 109 | (> double-click-threshold (- (dict-ref mouse 'at) 110 | (dict-ref last-mouse 'at 0)))) 111 | 112 | (define (click state canvas event) 113 | (let ([target-button (findf (curry button-hit? event) 114 | (card-buttons (current-card state)))]) 115 | (if target-button 116 | (let ([state (dict-update state 'mouse (curryr dict-set 'target-button 117 | target-button))]) 118 | (if (double-click? (state-mouse state) (state-last-mouse state)) 119 | ((button-edit state target-button) 'mouse (hash)) 120 | state)) 121 | state))) 122 | 123 | (define (make-button-corners down-event up-event) 124 | (list (min (send down-event get-x) (send up-event get-x)) 125 | (min (send down-event get-y) (send up-event get-y)) 126 | (max (send down-event get-x) (send up-event get-x)) 127 | (max (send down-event get-y) (send up-event get-y)))) 128 | 129 | (define (release state canvas event mouse) 130 | (if (not (dict-ref mouse 'target-button #f)) 131 | (let ([corners (make-button-corners (dict-ref mouse 'down) 132 | (dict-ref mouse 'last))]) 133 | (dict-update-in state `(stack cards ,(state-card state) buttons) 134 | (flip cons) (button corners "" "" #f))) 135 | state)) 136 | 137 | (define resize-threshold 10) 138 | 139 | (define (corner-deltas corners click-x click-y dx dy) 140 | ;; very repetitive, room for improvement here 141 | (list (if (> (- (third corners) click-x) resize-threshold) dx 0) 142 | (if (> (- (fourth corners) click-y) resize-threshold) dy 0) 143 | (if (> (- click-x (first corners)) resize-threshold) dx 0) 144 | (if (> (- click-y (second corners)) resize-threshold) dy 0))) 145 | 146 | (define (button-new-corners old-corners last-mouse new-mouse) 147 | (let* ([start-x (send last-mouse get-x)] 148 | [start-y (send last-mouse get-y)] 149 | [delta-x (- (send new-mouse get-x) start-x)] 150 | [delta-y (- (send new-mouse get-y) start-y)]) 151 | (map + (corner-deltas old-corners start-x start-y 152 | delta-x delta-y) old-corners))) 153 | 154 | (define (drag target event state) 155 | (let* ([card-name (state-card state)] 156 | [last-mouse (dict-ref (state-mouse state) 'last)] 157 | [new-button (dict-update-in target '(corners) 158 | button-new-corners last-mouse event)] 159 | [state (dict-update-in state '(mouse target-button) (λ _ new-button))] 160 | [state (dict-update-in state '(mouse) hash-set 'target-start-xy 161 | (list (send event get-x) (send event get-y)))]) 162 | (dict-update-in state `(stack cards ,card-name buttons) 163 | replace target new-button))) 164 | 165 | (define (move state canvas event) 166 | (if (dict-ref (state-mouse state) 'down #f) 167 | (let* ([target-button (dict-ref (state-mouse state) 'target-button #f)] 168 | [state (if target-button 169 | (drag target-button event state) 170 | state)]) 171 | (send canvas refresh) 172 | state) 173 | state)) 174 | 175 | 176 | ;;; rendering 177 | 178 | (define (render-button button dc render-invisible?) 179 | (if (button-name button) 180 | (send dc set-pen "black" 1 'solid) 181 | (send dc set-pen "black" 1 'long-dash)) 182 | (match (button-corners button) 183 | [(list left top right bottom) 184 | (when (or render-invisible? (button-name button)) 185 | (send dc draw-rectangle 186 | (min left right) (min top bottom) 187 | (- (max left right) (min left right)) 188 | (- (max top bottom) (min top bottom)))) 189 | (when (button-name button) 190 | (send dc draw-text (button-name button) (+ 6 left) (+ 3 top)))])) 191 | 192 | (define (paint state dc canvas) 193 | (send dc set-brush "white" 'transparent) 194 | (send dc set-smoothing 'unsmoothed) 195 | (for ([button (card-buttons (current-card state))]) 196 | (render-button button dc #t)) 197 | ;; if a button is currently being created 198 | (let ([down (dict-ref (state-mouse state) 'down #f)] 199 | [last (dict-ref (state-mouse state) 'last #f)]) 200 | (when (and down last (not (dict-ref (state-mouse state) 'target-button #f))) 201 | (render-button (button (list (send down get-x) (send down get-y) 202 | (send last get-x) (send last get-y)) 203 | "" "" #f) dc #t)))) 204 | 205 | (define buttons-mode 206 | (mode "buttons" click release move paint "draw" 207 | (make-object cursor% 'cross))) 208 | -------------------------------------------------------------------------------- /cooper/cooper.rkt: -------------------------------------------------------------------------------- 1 | #lang racket/gui 2 | 3 | (require "fstruct.rkt") 4 | 5 | (provide (struct-out card) 6 | (struct-out button) 7 | (struct-out stack) 8 | (struct-out state) 9 | (struct-out mode) 10 | now/c 11 | current-card swap! update! update-in! dict-update-in dict-ref-in 12 | flip index-of replace 13 | button-hit?) 14 | 15 | 16 | ;;; types and contracts 17 | 18 | (fstruct button (corners action code name)) 19 | 20 | (define button/c (struct/dc button 21 | ;; left top right bottom edges 22 | [corners (list/c natural-number/c natural-number/c 23 | natural-number/c natural-number/c)] 24 | ;; string here means jump to a given card name 25 | [action (or/c string? 'code)] 26 | ;; this code is only run when action is 'code 27 | ;; string must evaluate to a state -> state lambda 28 | [code string?] 29 | ;; if the name is #f, the button is invisible 30 | [name (or/c #f string?)])) 31 | 32 | (fstruct card (name background buttons events)) 33 | 34 | (define card/c (struct/dc card 35 | [name string?] 36 | ;; list of method calls to dc 37 | [background (listof (listof any/c))] 38 | [buttons (listof button/c)] 39 | ;; hash of event names to state -> state functions 40 | ;; should this be generalized to properties? 41 | [events (hash/c string? (or/c procedure? symbol?))])) 42 | 43 | (fstruct stack (name cards width height)) 44 | 45 | (define stack/c (struct/dc stack 46 | [name string?] 47 | [cards (hash/c string? card/c)] 48 | [width natural-number/c] 49 | [height natural-number/c])) 50 | 51 | (fstruct mode (name onclick onrelease onmove paint next cursor)) 52 | 53 | (fstruct state (card stack mode mouse last-mouse)) 54 | 55 | (define state/c (struct/dc state 56 | ;; current card name 57 | [card string?] 58 | [stack stack/c] 59 | [mode mode?] 60 | [mouse (hash/c symbol? any/c)] 61 | [last-mouse (hash/c symbol? any/c)])) 62 | 63 | (define handler/c (or/c #f (-> state/c (is-a?/c canvas%) (is-a?/c event%) 64 | state/c))) 65 | 66 | (define mode/c (struct/dc mode 67 | [name string?] 68 | [onclick handler/c] 69 | [onrelease handler/c] 70 | [onmove handler/c] 71 | [paint (or/c #f (-> state/c 72 | (is-a?/c dc<%>) 73 | (is-a?/c canvas%) 74 | any/c))] 75 | [next string?])) 76 | 77 | (define now/c (box/c state/c)) 78 | 79 | 80 | ;;; general helpers 81 | 82 | (define (swap! box f . args) 83 | (set-box! box (apply f (unbox box) args))) 84 | 85 | (define (update! box keys f) 86 | (set-box! box (dict-update (unbox box) keys f))) 87 | 88 | (define (update-in! box keys f . args) 89 | (set-box! box (apply dict-update-in (unbox box) keys f args))) 90 | 91 | (define (dict-update-in d ks f . args) 92 | (if (empty? (rest ks)) 93 | (dict-update d (first ks) (λ (x) (apply f x args))) 94 | (dict-set d (first ks) (apply dict-update-in (dict-ref d (first ks)) 95 | (rest ks) f args)))) 96 | 97 | (define (dict-ref-in d ks) 98 | (if (empty? (rest ks)) 99 | (dict-ref d (first ks)) 100 | (dict-ref-in (dict-ref d (first ks)) (rest ks)))) 101 | 102 | (define (flip f) 103 | (lambda args (apply f (reverse args)))) 104 | 105 | (define (replace lst old new) 106 | (map (lambda (x) (if (equal? x old) new x)) lst)) 107 | 108 | (define (index-of l x) ; how is this missing? 109 | (for/or ([y l] [i (in-naturals)] #:when (equal? x y)) i)) 110 | 111 | 112 | ;;; cooper-specific utilities 113 | 114 | (define (button-hit? event button) 115 | (match (button-corners button) 116 | [(list left top right bottom) 117 | (and (<= left (send event get-x) right) 118 | (<= top (send event get-y) bottom))])) 119 | 120 | (define (current-card state) 121 | (dict-ref (stack-cards (state-stack state)) (state-card state))) 122 | 123 | (module+ test 124 | (require rackunit) 125 | (let ([x (hash 'a (hash 'b 2 'c 3) 'd 4)]) 126 | (check-equal? (dict-ref (dict-update x 'd + 2) 'd) 6) 127 | (check-equal? (dict-ref-in (dict-update-in x '(a b) + 2) '(a b)) 4))) 128 | -------------------------------------------------------------------------------- /cooper/draw.rkt: -------------------------------------------------------------------------------- 1 | #lang racket/gui 2 | 3 | (require "cooper.rkt") 4 | 5 | (provide draw-mode) 6 | 7 | (define (release state canvas event mouse) 8 | (let ([down (dict-ref mouse 'down #f)]) 9 | (if down ; should never be false, need to investigate 10 | (dict-update-in state `(stack cards ,(state-card state) background) 11 | (flip cons) (list 'draw-line 12 | (send down get-x) 13 | (send down get-y) 14 | (send event get-x) 15 | (send event get-y))) 16 | state))) 17 | 18 | (define (paint state dc canvas) 19 | (let ([down (dict-ref (state-mouse state) 'down #f)] 20 | [last (dict-ref (state-mouse state) 'last #f)]) 21 | (when (and down last) 22 | (send dc set-pen "black" 1 'solid) 23 | (send dc draw-line 24 | (send down get-x) (send down get-y) 25 | (send last get-x) (send last get-y))))) 26 | 27 | (define (move state canvas event) 28 | (when (dict-ref (state-mouse state) 'down #f) 29 | (send canvas refresh)) 30 | state) 31 | 32 | (define draw-mode 33 | (mode "draw" #f release move paint "explore" 34 | (make-object cursor% 'bullseye))) 35 | -------------------------------------------------------------------------------- /cooper/explore.rkt: -------------------------------------------------------------------------------- 1 | #lang racket/gui 2 | 3 | (require "cooper.rkt") 4 | 5 | (provide explore-mode) 6 | 7 | (define (navigate-to state card-name) 8 | (let ([leave (dict-ref (card-events (current-card state)) 'leave 'identity)] 9 | [enter (dict-ref (card-events (current-card state)) 'enter 'identity)] 10 | [action-fn (λ (state) (state 'card card-name))]) 11 | ((apply compose (map eval (list enter action-fn leave))) state))) 12 | 13 | (define (run-code code state) 14 | (with-handlers ([exn:fail? (lambda (exn) 15 | (message-box "Problem with code" 16 | (exn-message exn) 17 | false '(ok stop)) 18 | false)]) 19 | (let ([code (eval (read (open-input-string code)))]) 20 | (if (procedure? code) 21 | (code state) 22 | (error "Button code is not a procedure:" code))))) 23 | 24 | (define (click state canvas event) 25 | (or (for/or [(button (card-buttons (current-card state)))] 26 | (if (button-hit? event button) 27 | (let ([action (button-action button)]) 28 | (if (eq? 'code action) 29 | (run-code (button-code button) state) 30 | (navigate-to state action))) 31 | #f)) state)) 32 | 33 | (define explore-mode 34 | (mode "explore" click #f #f #f "buttons" 35 | (make-object cursor% 'hand))) 36 | -------------------------------------------------------------------------------- /cooper/fstruct.rkt: -------------------------------------------------------------------------------- 1 | #lang racket 2 | 3 | (provide fstruct) 4 | 5 | (require (for-syntax syntax/parse 6 | racket/syntax) 7 | racket/match 8 | racket/serialize) 9 | 10 | ;; A functional struct macro. 11 | 12 | ;; This adds a few features over normal transparent structs including 13 | ;; supporting dictionary methods and being applicable. Calling an 14 | ;; fstruct with a single symbol argument reads from that field, while 15 | ;; calling with a field and value will return a new instance with that 16 | ;; field set to that value. 17 | 18 | ;; (fstruct abc (a b c)) 19 | ;; 20 | ;; ((abc 1 2 3) 'b) ; -> 2 21 | ;; ((abc 1 2 3) 'c 8) ; -> (abc 1 2 8) 22 | ;; (dict-ref (abc 1 2 3) 'a) ; -> 1 23 | ;; (dict-set (abc 1 2 3) 'b 4) ; -> (abc 1 4 3) 24 | ;; (dict-update (abc 1 2 3) 'c (curry + 10)) ; -> (abc 1 2 13) 25 | 26 | (define-syntax (fstruct stx) 27 | (syntax-parse stx 28 | [(_ id:id (field:id ...)) 29 | (with-syntax ([(accessor ...) 30 | (for/list ([fld (in-list (syntax->list #'(field ...)))]) 31 | (format-id stx "~a-~a" (syntax->datum #'id) fld))] 32 | [field-next (let* ([fs (syntax->datum #'(field ...))] 33 | [h (for/hash ([(f i) (in-indexed fs)]) 34 | (values f (if (< (length fs) i) 35 | (list-ref fs (add1 i)) 36 | #f)))]) 37 | (datum->syntax stx h))]) 38 | 39 | ;; Thanks to Greg Hendershott for making this a proper hygenic macro 40 | #'(serializable-struct 41 | id (field ...) #:transparent 42 | #:property prop:procedure 43 | (lambda (self . args) 44 | (match args 45 | [(list 'field) (accessor self)] ... 46 | [(list (list 'field)) (accessor self)] ... 47 | [(list (list-rest 'field fields)) ((accessor self) fields)] ... 48 | [(list 'field val) 49 | (struct-copy id self [field val])] ... 50 | [(list (list 'field) val) (self 'field val)] ... 51 | [(list (list-rest 'field fields) val) 52 | (struct-copy id self 53 | [field ((accessor self) fields val)])] ...)) 54 | 55 | #:methods gen:dict 56 | [(define (dict-ref dict key 57 | [default (λ () (error "key not found" key))]) 58 | (if (hash-has-key? field-next key) 59 | (dict key) 60 | (default key))) 61 | (define (dict-set dict key val) 62 | (dict key val)) 63 | (define (dict-iterate-first dict) 64 | (and (not (empty? field-next)) 65 | (first (hash-keys field-next)))) 66 | (define (dict-iterate-next dict pos) 67 | (if (hash-has-key? field-next pos) 68 | (hash-ref field-next pos) 69 | (error "key not found" pos))) 70 | (define (dict-iterate-key dict pos) 71 | (and (hash-has-key? field-next pos) pos)) 72 | (define (dict-iterate-value dict pos) 73 | (and (hash-has-key? field-next pos) (dict pos)))]))])) 74 | 75 | (module+ test 76 | (require rackunit) 77 | (fstruct abc (a b c)) 78 | 79 | (let ([s (abc 1 2 3)]) 80 | ;; Single argument for access 81 | (check-equal? (s 'a) 1) 82 | (check-equal? (s 'b) 2) 83 | (check-equal? (s 'c) 3) 84 | 85 | ;; 2 args for setting a field 86 | (check-equal? (abc 2 2 3) (s 'a 2))) 87 | 88 | ;; nested access 89 | (let ([nested (abc 1 (abc 1 2 (abc 1 2 3)) 3)]) 90 | (check-equal? (nested '(c)) 3) 91 | (check-equal? (nested '(b b)) 2) 92 | (check-equal? (nested '(b c a)) 1) 93 | 94 | ;; nested updates 95 | (let ([nested2 (nested '(c) 4)] 96 | [nested3 (nested '(b b) 5)] 97 | [nested4 (nested '(b c a) 9)]) 98 | (check-equal? (nested2 'c) 4) 99 | (check-equal? (nested3 '(b b)) 5) 100 | (check-equal? (nested4 '(b c a)) 9))) 101 | 102 | ;; dict operations 103 | (let* ([nested (abc 1 (abc 1 2 (abc 1 2 3)) 3)] 104 | [nested2 (dict-set nested 'a 2)] 105 | [nested3 (dict-update nested2 'a (curryr + 2))] 106 | [nested4 (dict-update nested 'b (curryr dict-update 107 | 'a (curryr + 2)))]) 108 | (print (equal? nested nested4)) 109 | (check-equal? (dict-ref nested 'a) 1) 110 | (check-equal? (dict-ref nested2 'a) 2) 111 | (check-equal? (dict-ref nested3 'a) 4) 112 | (check-equal? (dict-ref (dict-ref nested4 'b) 'a) 3))) 113 | -------------------------------------------------------------------------------- /cooper/main.rkt: -------------------------------------------------------------------------------- 1 | #lang racket/gui 2 | 3 | (require "cooper.rkt" "explore.rkt" "buttons.rkt" "draw.rkt" 4 | racket/serialize) 5 | 6 | (define modes `#hash(("explore" . ,explore-mode) 7 | ("buttons" . ,buttons-mode) 8 | ("draw" . ,draw-mode))) 9 | 10 | 11 | ;;; imperative bits 12 | 13 | (define debug (box #f)) 14 | 15 | (define (next-mode mode) 16 | (dict-ref modes (mode-next mode))) 17 | 18 | (define (handle-key now canvas event) 19 | (when (send event get-control-down) 20 | (case (send event get-key-code) 21 | ;; save 22 | [(#\s) (let ([filename (put-file "Save to:")]) 23 | (when filename 24 | (when (file-exists? filename) 25 | (delete-file filename)) 26 | (call-with-output-file filename 27 | (λ (port) 28 | (write (serialize (state-stack (unbox now))) port)))))] 29 | ;; load 30 | [(#\l) (let ([filename (get-file "Load:")]) 31 | (when filename 32 | (update! now 'stack 33 | (λ _ (call-with-input-file filename 34 | (compose zero-enter deserialize read)))) 35 | ;; TODO: not all stacks have a zero card? 36 | (update! now 'card (lambda _ "zero"))))] 37 | ;; new card 38 | [(#\n) (swap! now zero-new-card)] 39 | ;; clear background 40 | [(#\c) (update-in! now `(stack cards ,(state-card (unbox now)) background) 41 | (λ _ '()))] 42 | ;; clear buttons 43 | [(#\b) (update-in! now `(stack cards ,(state-card (unbox now)) buttons) 44 | (λ _ '()))] 45 | ;; navigate to card zero 46 | [(#\0) 47 | (update! now 'card (lambda _ "zero")) 48 | (swap! now zero-enter)]) 49 | (send canvas refresh))) 50 | 51 | (define (handle-mouse now canvas event) 52 | (case (send event get-event-type) 53 | [(left-down) 54 | (update-in! now '(mouse) dict-set 'down event) 55 | (update-in! now '(mouse) dict-set 'last event) 56 | (update-in! now '(mouse) dict-set 'at (current-milliseconds)) 57 | (let ([onclick (mode-onclick (state-mode (unbox now)))]) 58 | (and onclick (swap! now onclick canvas event)) 59 | (send canvas refresh))] 60 | [(left-up) 61 | (let ([mouse (state-mouse (unbox now))] 62 | [onrelease (mode-onrelease (state-mode (unbox now)))]) 63 | (update! now 'mouse (λ _ (hash))) 64 | (update! now 'last-mouse (λ _ mouse)) 65 | (and onrelease (swap! now onrelease canvas event mouse)) 66 | (send canvas refresh))] 67 | [(motion) 68 | (let ([onmove (mode-onmove (state-mode (unbox now)))]) 69 | (and onmove (swap! now onmove canvas event)) 70 | (update-in! now '(mouse) dict-set 'last event))] 71 | [(right-down) ; TODO: change modes via right-click menu 72 | (update-in! now '(mode) next-mode) 73 | (update-in! now '(mouse) (λ _ (hash))) 74 | (send canvas set-cursor (dict-ref-in (unbox now) '(mode cursor))) 75 | (send canvas refresh)])) 76 | 77 | (define motion-drop-threshold 100) 78 | (define last-motion (box 0)) 79 | 80 | ;; without this we get spammed with mouse motion events much faster than we can 81 | ;; deal with them. kind of a terrible hack. 82 | (define (drop-motion? event) 83 | (if (< (- (send event get-time-stamp) 84 | (unbox last-motion)) motion-drop-threshold) 85 | #t 86 | (begin (set-box! last-motion (send event get-time-stamp)) 87 | #f))) 88 | 89 | (define (card-canvas% now semaphore) 90 | (class canvas% 91 | (when (unbox debug) 92 | (printf "state: ~s~n" (unbox now))) 93 | (define/override (on-char event) 94 | (call-with-semaphore semaphore handle-key 95 | (lambda () #f) now this event) 96 | (send (send this get-parent) set-label 97 | (string-append "Cooper: " (state-card (unbox now))))) 98 | (define/override (on-event event) 99 | (when (or (not (equal? 'motion (send event get-event-type))) 100 | (not (drop-motion? event))) 101 | (call-with-semaphore semaphore handle-mouse 102 | (lambda () #f) now this event) 103 | (send (send this get-parent) set-label 104 | (string-append "Cooper: " (state-card (unbox now)))))) 105 | (super-new))) 106 | 107 | ;; we re-draw from scratch every time! lots of room for optimization here. 108 | (define (paint now canvas dc) 109 | (let ([state (unbox now)]) 110 | (send dc clear) 111 | (send dc set-brush "white" 'solid) 112 | (send dc set-pen "black" 1 'solid) ; default 113 | (send dc set-smoothing 'unsmoothed) 114 | (for [(step (card-background (current-card state)))] 115 | (apply dynamic-send dc step)) 116 | (for [(button (card-buttons (current-card state)))] 117 | (render-button button dc #f)) 118 | (let ([painter (mode-paint (state-mode state))]) 119 | (when painter 120 | (painter (unbox now) dc canvas))))) 121 | 122 | 123 | ;;; card zero is the index; contains buttons to all the other cards 124 | 125 | (define zero-button-x-offset 25) 126 | 127 | (define zero-button-y-offset 30) 128 | 129 | (define (zero-place-button card i buttons) 130 | (cons (button (list zero-button-x-offset (* zero-button-y-offset (add1 i)) 131 | 200 (- (* zero-button-y-offset (+ 2 i)) 5)) 132 | (card-name card) "" (card-name card)) 133 | buttons)) 134 | 135 | (define (zero-delete-card name state) 136 | (zero-enter (dict-update-in state '(stack cards) dict-remove name))) 137 | 138 | (define (zero-copy-card name state) 139 | (let* ([old-card (dict-ref-in state `(stack cards ,name))] 140 | [new-card (dict-update-in old-card '(name) string-append " copy")]) 141 | (zero-enter (dict-update-in state '(stack cards) 142 | dict-set (card-name new-card) new-card)))) 143 | 144 | (define (zero-place-delete-button card i buttons) 145 | (cons (button (list (+ 215 zero-button-x-offset) 146 | (* zero-button-y-offset (add1 i)) 147 | (+ 240 zero-button-x-offset) 148 | (- (* zero-button-y-offset (+ 2 i)) 5)) 149 | 'code (format "(λ (state) (zero-delete-card ~s state))" 150 | (card 'name)) "x") 151 | buttons)) 152 | 153 | (define (zero-place-copy-button card i buttons) 154 | (cons (button (list (+ 260 zero-button-x-offset) 155 | (* zero-button-y-offset (add1 i)) 156 | (+ 285 zero-button-x-offset) 157 | (- (* zero-button-y-offset (+ 2 i)) 5)) 158 | 'code (format "(lambda (state) (zero-copy-card ~s state))" 159 | (card 'name)) "+") 160 | buttons)) 161 | 162 | (define (zero-buttons stack card) 163 | (let* ([buttons (foldl zero-place-button '() 164 | (dict-values (stack-cards stack)) 165 | (range (dict-count (stack-cards stack))))] 166 | [buttons (foldl zero-place-delete-button buttons 167 | (dict-values (stack-cards stack)) 168 | (range (dict-count (stack-cards stack))))] 169 | [buttons (foldl zero-place-copy-button buttons 170 | (dict-values (stack-cards stack)) 171 | (range (dict-count (stack-cards stack))))]) 172 | (card 'buttons (cons zero-new-card-button buttons)))) 173 | 174 | ;; this function refreshes card zero's button list 175 | (define (zero-enter state) 176 | (dict-update-in state `(stack cards "zero") 177 | (curry zero-buttons (state-stack state)))) 178 | 179 | (define (zero-new-card state) 180 | (let ([card-name (get-text-from-user "card" "New card name:")]) 181 | (if card-name 182 | (zero-enter (dict-update-in state '(stack cards) 183 | dict-set card-name 184 | (card card-name '() '() (hash)))) 185 | state))) 186 | 187 | (define zero-new-card-button (button '(0 0 25 30) 'code "zero-new-card" "+")) 188 | 189 | (define card-zero (card "zero" '() '() (hash "enter" 'zero-enter))) 190 | 191 | (define card-one (card "one" '() '() (hash))) 192 | 193 | 194 | ;;; loading 195 | 196 | (module+ main 197 | (let* ([stack (stack "new" (hash "zero" card-zero "one" card-one) 800 600)] 198 | [now (box (zero-enter (state "zero" stack (dict-ref modes "explore") 199 | (hash) (hash))))] 200 | [now (if (unbox debug) 201 | (contract now/c now 'valid-state 'invalid-state) 202 | now)] 203 | [frame (new frame% [label "Cooper"] 204 | [width (stack-width stack)] [height (stack-height stack)])] 205 | [canvas (new (card-canvas% now (make-semaphore 1)) [parent frame] 206 | [paint-callback (curry paint now)])]) 207 | (send frame show #t) 208 | (send canvas set-cursor (mode-cursor explore-mode)) 209 | now)) 210 | -------------------------------------------------------------------------------- /info.rkt: -------------------------------------------------------------------------------- 1 | #lang info 2 | (define collection "cooper") 3 | -------------------------------------------------------------------------------- /mystack.rktd: -------------------------------------------------------------------------------- 1 | ;; sample stack file 2 | #s(stack 3 | "mystack" 4 | #hash(("first" 5 | . 6 | #s(card 7 | "first" 8 | ((set-brush "green" solid) (draw-rectangle 5 10 90 20) (draw-line 60 60 100 100)) 9 | (#s(button (5 10 95 30) "second")))) 10 | ("second" 11 | . 12 | #s(card 13 | "second" 14 | ((set-brush "blue" solid) (draw-ellipse 10 10 50 50)) 15 | (#s(button (10 10 60 60) "first"))))) 16 | 800 17 | 600) --------------------------------------------------------------------------------