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-#lang racket
-(require racket/gui/base)
-;Author:Douglas Richardson
-;Notes:Our GUI mostly deals with lists of a list of 3 strings and a number
-;although the number is always delt with locally
-;When using user-message you need to give it a list of 3 things
-;The name of the user as a string, what they said as a string,
-;and the color as a string
-
-;Object stuff
-
-(define (make-gui)
- (begin
- ;;Create the frame
- (define main-frame (new frame%
- [label "Example5"]
- [width 500]
- [height 700]
- ))
- ;;Editing canvas
- (define (do-stuff-paint paint-canvas paint-dc)
- (do-more-stuff-paint listy paint-canvas paint-dc))
-
- (define (do-more-stuff-paint paint-listy paint-canvas paint-dc)
- (if (null? paint-listy)
- '()
- (begin
- (re-draw-message (get-username-from-list (car paint-listy))
- (get-message-from-list (car paint-listy))
- (get-color-from-list (car paint-listy))
- (get-height-from-list (car paint-listy)))
- (do-more-stuff-paint (cdr paint-listy) paint-canvas paint-dc))))
-
- (define read-canvas (new canvas%
- [parent main-frame]
- [paint-callback do-stuff-paint]
- [style '(hscroll vscroll)]
- ))
-
- (send read-canvas init-auto-scrollbars #f #f 0 0);Start with no scrollbars
- ;;text-field stuff
- (define (text-feild-callback callback-type other-thing)
- (if (equal? 'text-field-enter (send other-thing get-event-type))
- (button-do-stuff 'irrelevant 'not-used)
- '()))
-
- (define input (new text-field%
- [parent main-frame]
- [label "Username:"]
- [callback text-feild-callback]
- ))
- ;;button stuff
- (define (button-do-stuff b e);b and e do nothing :/
- (begin
- (if (color-change-request? (send input get-value))
- (set! my-color (get-color-from-input (send input get-value)))
- (if (< 0 (string-length (send input get-value)))
- (send-message (send input get-value) my-color)
- '()))
- (send input set-value "")
- ))
- (define send-button (new button%
- [parent main-frame]
- [label "Send"]
- [callback button-do-stuff]))
- ;;I forget what these do but don't move them
- (define dc (send read-canvas get-dc))
- (send dc set-scale 1 1)
- (send dc set-text-foreground "black")
- ;;messaging stuff
-
- (define (user-message-parse string start)
- (begin
- (define (helper str index)
- (if (eq? (string-ref str (+ start index)) #\~)
- (substring str start (+ start index))
- (helper str (+ index 1))))
- (helper string 0)))
-
- (define (user-message onetrueinput)
- (begin
- (define username (user-message-parse onetrueinput 0))
- (define input (user-message-parse onetrueinput (+ 1(string-length username))))
- (define color (substring onetrueinput (+ 2 (string-length username) (string-length input))))
- (send dc set-text-foreground color)
- (send dc draw-text (string-append username ":" input) 0 height)
- (set! listy (appendlist listy (list username input color height)))
- (set! height (+ height 15))
- (set! min-v-size (+ min-v-size 15))
- (if (> (* 20 (string-length input)) min-h-size)
- (set! min-h-size (* 20 (string-length input)))
- '())
- (send read-canvas init-auto-scrollbars min-h-size min-v-size 0 1)
- ))
- ;;Add a function that parces input from a string and extracts elements
-
- ;;This probably won't change...
- (define (send-message input color)
- (user-message (string-append name "~" input "~" color)))
- ;;Although re-draw is kind of misleading, it is just print the whole
- ;;list of strings to the screen
- (define (re-draw-message username input color in-height)
- (begin
- (send dc set-text-foreground color)
- (send dc draw-text (string-append username ":" input) 0 in-height)
- ))
-
- (define (update given-list)
- (begin (set! listy '())
- (set! height 0)
- (update-helper given-list)))
-
- (define (update-helper given-list)
- (if (null? given-list)
- '()
- (if (null? (car given-list))
- '()
- (begin (user-message
- (get-username-from-list (car given-list))
- (get-message-from-list (car given-list))
- (get-color-from-list (car given-list)))
- (update-helper (cdr given-list))))))
-
- ;;Variables go below functions
- (define name "Me")
- (define min-h-size 80)
- (define min-v-size 30)
- (define listy (list (list "Server" "Connected" "Red" 0)))
- (define my-color "black")
- (define height 15)
- ;;dispatch goes below that
- (define (dispatch command)
- (cond ((eq? command 'show) (send main-frame show #t))
- ((eq? command 'send) send-message)
- ((eq? command 'set-name) (lambda (newname) (if (string? newname)
- (set! name newname)
- (print "Thats not good"))))
- ((eq? command 'recieve-message) user-message)
- ((eq? command 'get-list) listy)
- ((eq? command 'set-list) update)
- ;;Something up with that
- (else (error "Invalid Request" command))
- ))
- ;;dispatch goes below that
- dispatch))
-
-
-;This one displays information
-
-
-
-
-;Initilize scrolling
-
-;Then we need to find out if we need them or not.
-
-;Listy is going to be a list of lists of strings
-;each element in listy will contain three strings
-;the username the message they said and the color they used
-;The the height the message should display at
-
-
-(define (appendlist listoflist add-to-end)
- (if (null? listoflist)
- (cons add-to-end '())
- (cons (car listoflist) (appendlist (cdr listoflist) add-to-end))))
-
-(define (get-username-from-list in-list)
- (car in-list))
-
-(define (get-message-from-list in-list)
- (car (cdr in-list)))
-
-(define (get-color-from-list in-list)
- (car (cdr (cdr in-list))))
-
-(define (get-height-from-list in-list)
- (car (cdr (cdr (cdr in-list)))))
-
-
-
-;this one is a crap version of justpressing the enter key
-(define (color-change-request? given-string)
- (if (> (string-length given-string) 7)
- (if (equal? (substring given-string 0 6) "/color")
- #t
- #f)
- #f))
-
-(define (get-color-from-input given-string)
- (substring given-string 7))
-;(define thing1 (make-gui))
-;(define thing2 (make-gui))
-