#lang scheme/gui

(require "square-panel.ss")

(let* ([frame (new frame% [label "Test of Square Canvas"])]
       [square-panel (new square-panel% [parent frame] [border 50] [spacing 20] 
                          [alignment '(left center)])])
  (define (build-canvas stretch? size-x size-y pen-color brush-color)
    (letrec ([pen   (make-object pen% pen-color 1 'solid)]
             [brush (make-object brush% brush-color 'solid)]
             [canvas (new canvas% 
                          [parent square-panel] [style '()]
                          [min-width size-x] [min-height size-y]
                          [stretchable-width stretch?] [stretchable-height stretch?]
                          [paint-callback (λ (b dc) 
                                            (let-values ([(w h) (send canvas get-size)])
                                              (let ([dc (send canvas get-dc)])
                                                (send dc set-pen pen)
                                                (send dc set-brush brush)
                                                (send dc draw-rectangle 0 0 w h)
                                                (send dc draw-line 0 0 w h)
                                                (send dc draw-line 0 h w 0))))])])
      canvas))
  (build-canvas #t 100 50  "red" "white")
  (build-canvas #f 200 100 "green" "black")
  (build-canvas #t 50  100 "white" "red")
  (build-canvas #f 150 100 "yellow" "green")
  (send frame show #t))