e90ec4b69f
Reorganized contracts Started exposing customization API in plot/utils Now dog-fooding customization API in earnest
488 lines
21 KiB
Racket
488 lines
21 KiB
Racket
#lang racket/base
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(require racket/draw racket/class racket/contract racket/match racket/math racket/list racket/string
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"../common/area.rkt"
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"../common/ticks.rkt"
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"../common/contract.rkt"
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"../common/math.rkt"
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"../common/axis-transform.rkt"
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"../common/sample.rkt"
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"../common/legend.rkt"
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"../common/parameters.rkt"
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"../common/utils.rkt"
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"clip.rkt")
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(provide 2d-plot-area%)
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(define 2d-plot-area%
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(class plot-area%
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(init-field rx-ticks rx-far-ticks ry-ticks ry-far-ticks
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x-min x-max y-min y-max)
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(init dc dc-x-min dc-y-min dc-x-size dc-y-size)
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(inherit
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set-alpha set-pen set-major-pen set-minor-pen set-brush set-background set-text-foreground
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set-font restore-drawing-params reset-drawing-params
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get-text-width get-text-extent get-char-height get-char-baseline
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set-clipping-rect clear-clipping-rect
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clear draw-polygon draw-rectangle draw-line draw-lines draw-text draw-glyphs draw-arrow
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draw-tick draw-legend)
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(super-make-object dc dc-x-min dc-y-min dc-x-size dc-y-size)
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(reset-drawing-params)
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(define char-height (get-char-height))
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(define dc-x-max (+ dc-x-min dc-x-size))
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(define dc-y-max (+ dc-y-min dc-y-size))
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(define title-y-min
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(cond [(and (plot-decorations?) (plot-title)) (+ dc-y-min (* 3/2 char-height))]
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[else dc-y-min]))
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(define x-size (- x-max x-min))
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(define y-size (- y-max y-min))
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(define clipping? #f)
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(define clip-x-min x-min)
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(define clip-x-max x-max)
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(define clip-y-min y-min)
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(define clip-y-max y-max)
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(define/public (clip-to-bounds rx-min rx-max ry-min ry-max)
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(set! clipping? #t)
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(define cx-min (if rx-min (max* x-min rx-min) x-min))
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(define cx-max (if rx-max (min* x-max rx-max) x-max))
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(define cy-min (if ry-min (max* y-min ry-min) y-min))
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(define cy-max (if ry-max (min* y-max ry-max) y-max))
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(let ([cx-min (min* cx-min cx-max)]
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[cx-max (max* cx-min cx-max)]
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[cy-min (min* cy-min cy-max)]
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[cy-max (max* cy-min cy-max)])
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(set! clip-x-min cx-min)
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(set! clip-x-max cx-max)
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(set! clip-y-min cy-min)
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(set! clip-y-max cy-max)))
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(define/public (clip-to-none)
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(set! clipping? #f))
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(define/public (get-x-ticks) x-ticks)
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(define/public (get-x-far-ticks) x-far-ticks)
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(define/public (get-y-ticks) y-ticks)
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(define/public (get-y-far-ticks) y-far-ticks)
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(define/public (get-x-min) x-min)
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(define/public (get-x-max) x-max)
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(define/public (get-y-min) y-min)
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(define/public (get-y-max) y-max)
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(define/public (get-bounds) (values x-min x-max y-min y-max))
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(define/public (get-clip-bounds)
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(cond [clipping? (values clip-x-min clip-x-max clip-y-min clip-y-max)]
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[else (values x-min x-max y-min y-max)]))
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(define identity-transforms?
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(and (equal? (plot-x-transform) id-transform)
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(equal? (plot-y-transform) id-transform)))
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(define plot->view
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(cond
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[identity-transforms? (λ (v) v)]
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[else
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(match-define (invertible-function fx _) (apply-transform (plot-x-transform) x-min x-max))
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(match-define (invertible-function fy _) (apply-transform (plot-y-transform) y-min y-max))
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(λ (v)
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(match-define (vector x y) v)
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(vector (fx x) (fy y)))]))
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(define view->dc #f)
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(define/public (plot->dc v) (view->dc (plot->view v)))
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(define (make-view->dc left right top bottom)
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(define corners (list (vector x-min y-min) (vector x-min y-max)
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(vector x-max y-min) (vector x-max y-max)))
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(match-define (list (vector xs ys) ...) (map plot->view corners))
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(define view-x-min (apply min xs))
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(define view-x-max (apply max xs))
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(define view-y-min (apply min ys))
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(define view-y-max (apply max ys))
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(define area-x-min (+ dc-x-min left))
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(define area-x-max (- dc-x-max right))
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(define area-y-min (+ dc-y-min top))
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(define area-y-max (- dc-y-max bottom))
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(define area-x-size (- area-x-max area-x-min))
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(define area-y-size (- area-y-max area-y-min))
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(define area-per-view-x (/ area-x-size (- view-x-max view-x-min)))
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(define area-per-view-y (/ area-y-size (- view-y-max view-y-min)))
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(λ (v)
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(match-define (vector x y) v)
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(vector (+ area-x-min (* (- x x-min) area-per-view-x))
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(- area-y-max (* (- y y-min) area-per-view-y)))))
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;; Initial view->dc (draws labels and half of every tick off the allotted space on the dc)
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(define init-top-margin (- title-y-min dc-y-min))
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(set! view->dc (make-view->dc 0 0 init-top-margin 0))
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;; ===============================================================================================
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;; Tick and label constants
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(define (collapse-ticks ts dc-pos)
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(define (dc-dist t1 t2) (abs (- (dc-pos t1) (dc-pos t2))))
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(let ([ts (sort ts < #:key pre-tick-value)])
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(define tss
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(group-neighbors ts (λ (t1 t2) ((dc-dist t1 t2) . <= . (* 2 (plot-line-width))))))
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(for/list ([ts (in-list tss)])
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(match-define (list (tick xs majors labels) ...) ts)
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(define x (let ([xs (remove-duplicates xs)])
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(/ (apply + xs) (length xs))))
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(define major? (ormap values majors))
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(define label (string-join (remove-duplicates (map tick-label (filter pre-tick-major? ts)))
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"|"))
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(tick x major? label))))
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(define ((x-tick-dc-pos y) t)
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(vector-ref (plot->dc (vector (pre-tick-value t) y)) 0))
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(define ((y-tick-dc-pos x) t)
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(vector-ref (plot->dc (vector x (pre-tick-value t))) 1))
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(define x-ticks
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(collapse-ticks (filter (λ (t) (<= x-min (pre-tick-value t) x-max)) rx-ticks)
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(x-tick-dc-pos y-min)))
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(define x-far-ticks
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(collapse-ticks (filter (λ (t) (<= x-min (pre-tick-value t) x-max)) rx-far-ticks)
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(x-tick-dc-pos y-max)))
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(define y-ticks
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(collapse-ticks (filter (λ (t) (<= y-min (pre-tick-value t) y-max)) ry-ticks)
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(y-tick-dc-pos x-min)))
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(define y-far-ticks
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(collapse-ticks (filter (λ (t) (<= y-min (pre-tick-value t) y-max)) ry-far-ticks)
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(y-tick-dc-pos x-min)))
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(define draw-x-far-tick-labels? (not (and (plot-x-axis?) (equal? x-ticks x-far-ticks))))
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(define draw-y-far-tick-labels? (not (and (plot-y-axis?) (equal? y-ticks y-far-ticks))))
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(define (max-tick-offset ts)
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(cond [(empty? ts) 0]
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[(ormap pre-tick-major? ts) (+ (pen-gap) (* 1/2 (plot-tick-size)))]
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[else (+ (pen-gap) (* 1/4 (plot-tick-size)))]))
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(define max-x-tick-offset (if (plot-x-axis?) (max-tick-offset x-ticks) 0))
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(define max-y-tick-offset (if (plot-y-axis?) (max-tick-offset y-ticks) 0))
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(define max-x-far-tick-offset (if (plot-x-far-axis?) (max-tick-offset x-far-ticks) 0))
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(define max-y-far-tick-offset (if (plot-y-far-axis?) (max-tick-offset y-far-ticks) 0))
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(define (max-tick-label-height ts)
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(if (ormap pre-tick-major? ts) char-height 0))
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(define (max-tick-label-width ts)
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(apply max 0 (for/list ([t (in-list ts)] #:when (pre-tick-major? t))
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(get-text-width (tick-label t)))))
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(define max-x-tick-label-height (if (plot-x-axis?) (max-tick-label-height x-ticks) 0))
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(define max-y-tick-label-width (if (plot-y-axis?) (max-tick-label-width y-ticks) 0))
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(define max-x-far-tick-label-height (if (and (plot-x-far-axis?) draw-x-far-tick-labels?)
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(max-tick-label-height x-far-ticks)
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0))
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(define max-y-far-tick-label-width (if (and (plot-y-far-axis?) draw-y-far-tick-labels?)
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(max-tick-label-width y-far-ticks)
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0))
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;; ===============================================================================================
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;; Axis label parameters
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(define (get-x-label-params)
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(define offset (vector 0 (+ max-x-tick-offset
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max-x-tick-label-height
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(* 1/2 char-height))))
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(list (plot-x-label) (v+ (view->dc (vector (* 1/2 (+ x-min x-max)) y-min)) offset)
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'top))
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(define (get-y-label-params)
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(define offset (vector (+ max-y-tick-offset
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max-y-tick-label-width
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(* 1/2 char-height))
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0))
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(list (plot-y-label) (v- (view->dc (vector x-min (* 1/2 (+ y-min y-max)))) offset)
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'bottom (/ pi 2)))
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(define (get-x-far-label-params)
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(define offset (vector 0 (+ max-x-far-tick-offset
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max-x-far-tick-label-height
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(* 1/2 char-height))))
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(list (plot-x-far-label) (v- (view->dc (vector (* 1/2 (+ x-min x-max)) y-max)) offset)
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'bottom))
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(define (get-y-far-label-params)
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(define offset (vector (+ max-y-far-tick-offset
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max-y-far-tick-label-width
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(* 1/2 char-height))
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0))
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(list (plot-y-far-label) (v+ (view->dc (vector x-max (* 1/2 (+ y-min y-max)))) offset)
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'top (/ pi 2)))
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;; ===============================================================================================
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;; Tick label parameters
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(define (get-x-tick-label-params)
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(define offset (vector 0 (+ (pen-gap) (* 1/2 (plot-tick-size)))))
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(for/list ([t (in-list x-ticks)] #:when (pre-tick-major? t))
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(match-define (tick x _ label) t)
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(list label (v+ (plot->dc (vector x y-min)) offset) 'top)))
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(define (get-y-tick-label-params)
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(define offset (vector (+ (pen-gap) (* 1/2 (plot-tick-size))) 0))
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(for/list ([t (in-list y-ticks)] #:when (pre-tick-major? t))
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(match-define (tick y _ label) t)
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(list label (v- (plot->dc (vector x-min y)) offset) 'right)))
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(define (get-x-far-tick-label-params)
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(define offset (vector 0 (+ (pen-gap) (* 1/2 (plot-tick-size)))))
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(for/list ([t (in-list x-far-ticks)] #:when (pre-tick-major? t))
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(match-define (tick x _ label) t)
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(list label (v- (plot->dc (vector x y-max)) offset) 'bottom)))
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(define (get-y-far-tick-label-params)
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(define offset (vector (+ (pen-gap) (* 1/2 (plot-tick-size))) 0))
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(for/list ([t (in-list y-far-ticks)] #:when (pre-tick-major? t))
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(match-define (tick y _ label) t)
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(list label (v+ (plot->dc (vector x-max y)) offset) 'left)))
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;; ===============================================================================================
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;; Tick parameters
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(define (get-tick-params)
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(cond [(plot-decorations?)
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(define radius (* 1/2 (plot-tick-size)))
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(define 1/2radius (* 1/2 radius))
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(append
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(for/list ([t (in-list (if (plot-x-axis?) x-ticks empty))])
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(match-define (tick x major? _) t)
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(list major? (plot->dc (vector x y-min)) (if major? radius 1/2radius) (* 1/2 pi)))
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(for/list ([t (in-list (if (plot-y-axis?) y-ticks empty))])
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(match-define (tick y major? _) t)
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(list major? (plot->dc (vector x-min y)) (if major? radius 1/2radius) 0))
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(for/list ([t (in-list (if (plot-x-far-axis?) x-far-ticks empty))])
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(match-define (tick x major? _) t)
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(list major? (plot->dc (vector x y-max)) (if major? radius 1/2radius) (* 1/2 pi)))
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(for/list ([t (in-list (if (plot-y-far-axis?) y-far-ticks empty))])
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(match-define (tick y major? _) t)
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(list major? (plot->dc (vector x-max y)) (if major? radius 1/2radius) 0)))]
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[else empty]))
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;; ===============================================================================================
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;; Fixpoint margin computation
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(define (get-label-params)
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(cond [(plot-decorations?)
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(append (if (plot-x-label) (list (get-x-label-params)) empty)
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(if (plot-y-label) (list (get-y-label-params)) empty)
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(if (plot-x-far-label) (list (get-x-far-label-params)) empty)
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(if (plot-y-far-label) (list (get-y-far-label-params)) empty)
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(if (plot-x-axis?) (get-x-tick-label-params) empty)
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(if (plot-y-axis?) (get-y-tick-label-params) empty)
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(if (and (plot-x-far-axis?) draw-x-far-tick-labels?)
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(get-x-far-tick-label-params)
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empty)
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(if (and (plot-y-far-axis?) draw-y-far-tick-labels?)
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(get-y-far-tick-label-params)
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empty))]
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[else empty]))
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(define (new-margins left right top bottom label-params tick-params)
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(match-define (list (vector label-xs label-ys) ...)
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(append* (map (λ (params) (send/apply this get-text-corners params)) label-params)))
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(match-define (list (vector tick-xs tick-ys) ...)
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(append* (map (λ (params) (send/apply this get-tick-endpoints (rest params))) tick-params)))
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(define xs (append label-xs tick-xs))
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(define ys (append label-ys tick-ys))
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(define param-x-min (apply min dc-x-min xs))
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(define param-x-max (apply max (sub1 dc-x-max) xs))
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(define param-y-min (apply min title-y-min ys))
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(define param-y-max (apply max (sub1 dc-y-max) ys))
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(values (+ left (- dc-x-min param-x-min))
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(- right (- (sub1 dc-x-max) param-x-max))
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(+ top (- title-y-min param-y-min))
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(- bottom (- (sub1 dc-y-max) param-y-max))))
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(define-values (area-x-min right area-y-min bottom)
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(for/fold ([left 0] [right 0] [top init-top-margin] [bottom 0]) ([i (in-range 5)])
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(define-values (new-left new-right new-top new-bottom)
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(new-margins left right top bottom (get-label-params) (get-tick-params)))
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(set! view->dc (make-view->dc new-left new-right new-top new-bottom))
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;(printf "margins: ~v ~v ~v ~v~n" new-left new-right new-top new-bottom)
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(values new-left new-right new-top new-bottom)))
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(define area-x-max (- dc-x-max right))
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(define area-y-max (- dc-y-max bottom))
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;; ===============================================================================================
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;; Plot decoration
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(define (draw-labels)
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(for ([params (in-list (get-label-params))])
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(send/apply this draw-text params)))
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(define (draw-ticks)
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(for ([params (in-list (get-tick-params))])
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(match-define (list major? v r angle) params)
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(if major? (set-major-pen) (set-minor-pen))
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(send this draw-tick v r angle)))
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(define (draw-title)
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(when (and (plot-decorations?) (plot-title))
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(draw-text (plot-title) (vector (* 1/2 (+ dc-x-min dc-x-max)) dc-y-min) 'top)))
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(define (draw-borders)
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(when (plot-decorations?)
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(set-minor-pen)
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(when (plot-x-axis?) (draw-line (vector area-x-min area-y-max)
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(vector area-x-max area-y-max)))
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(when (plot-x-far-axis?) (draw-line (vector area-x-min area-y-min)
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(vector area-x-max area-y-min)))
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(when (plot-y-axis?) (draw-line (vector area-x-min area-y-min)
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(vector area-x-min area-y-max)))
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(when (plot-y-far-axis?) (draw-line (vector area-x-max area-y-min)
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(vector area-x-max area-y-max)))))
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;; ===============================================================================================
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;; Drawing
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(define/public (start-plot)
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(reset-drawing-params)
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(clear)
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(draw-borders)
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(draw-ticks))
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(define/public (start-renderer rx-min rx-max ry-min ry-max)
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(reset-drawing-params)
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(set-clipping-rect (vector (+ 1/2 (- area-x-min (plot-line-width)))
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(+ 1/2 (- area-y-min (plot-line-width))))
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(vector (+ area-x-max (plot-line-width))
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(+ area-y-max (plot-line-width))))
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(clip-to-bounds rx-min rx-max ry-min ry-max))
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(define/public (end-plot)
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(clear-clipping-rect)
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(clip-to-none)
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(reset-drawing-params)
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(draw-title)
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(draw-labels))
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(define/public (put-legend legend-entries)
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(define gap-size (+ (pen-gap) (* 1/2 (plot-tick-size))))
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(draw-legend legend-entries
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(+ area-x-min gap-size) (- area-x-max gap-size)
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(+ area-y-min gap-size) (- area-y-max gap-size)))
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(define (subdivide-line v1 v2)
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(let/ec return
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(match-define (vector dc-x1 dc-y1) (plot->dc v1))
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(match-define (vector dc-x2 dc-y2) (plot->dc v2))
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(define dc-dx (- dc-x2 dc-x1))
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(define dc-dy (- dc-y2 dc-y1))
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(when (or (zero? dc-dx) (zero? dc-dy)) (return (list v1 v2)))
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(match-define (vector x1 y1) v1)
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(match-define (vector x2 y2) v2)
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(cond [((abs dc-dx) . > . (abs dc-dy))
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(define num (+ 1 (inexact->exact (ceiling (* 1/3 (abs dc-dx))))))
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(define xs (nonlinear-seq x1 x2 num (plot-x-transform)))
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(define m (/ (- y2 y1) (- x2 x1)))
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(define b (- y1 (* m x1)))
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(define ys (map (λ (x) (+ (* m x) b)) xs))
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(map vector xs ys)]
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[else
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(define num (+ 1 (inexact->exact (ceiling (* 1/3 (abs dc-dy))))))
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(define ys (nonlinear-seq y1 y2 num (plot-y-transform)))
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(define m (/ (- x2 x1) (- y2 y1)))
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(define b (- x1 (* m y1)))
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(define xs (map (λ (y) (+ (* m y) b)) ys))
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(map vector xs ys)])))
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(define (subdivide-lines vs)
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(append
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(append*
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(for/list ([v1 (in-list vs)] [v2 (in-list (rest vs))])
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(define line-vs (subdivide-line v1 v2))
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(take line-vs (sub1 (length line-vs)))))
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(list (last vs))))
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(define (subdivide-polygon vs)
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(subdivide-lines (append vs (list (first vs)))))
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(define/public (put-lines vs)
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(for ([vs (vregular-sublists vs)])
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(for ([vs (if clipping?
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(in-list (clip-lines vs clip-x-min clip-x-max
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clip-y-min clip-y-max))
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(in-value vs))])
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(when (not (empty? vs))
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(let ([vs (if identity-transforms? vs (subdivide-lines vs))])
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(draw-lines (map (λ (v) (plot->dc v)) vs)))))))
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(define/public (put-line v1 v2)
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(when (and (vregular? v1) (vregular? v2))
|
|
(let-values ([(v1 v2) (if clipping?
|
|
(clip-line v1 v2 clip-x-min clip-x-max
|
|
clip-y-min clip-y-max)
|
|
(values v1 v2))])
|
|
(when (and v1 v2)
|
|
(if identity-transforms?
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|
(draw-line (plot->dc v1) (plot->dc v2))
|
|
(draw-lines (map (λ (v) (plot->dc v))
|
|
(subdivide-line v1 v2))))))))
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|
|
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(define/public (put-polygon vs)
|
|
(when (andmap vregular? vs)
|
|
(let* ([vs (if clipping?
|
|
(clip-polygon vs clip-x-min clip-x-max
|
|
clip-y-min clip-y-max)
|
|
vs)])
|
|
(when (not (empty? vs))
|
|
(if identity-transforms?
|
|
(draw-polygon (map (λ (v) (plot->dc v)) vs))
|
|
(draw-polygon (map (λ (v) (plot->dc v))
|
|
(subdivide-polygon vs))))))))
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|
|
|
(define/public (put-rectangle v1 v2)
|
|
(when (and (vregular? v1) (vregular? v2))
|
|
(let-values ([(v1 v2) (if clipping?
|
|
(clip-rectangle v1 v2 clip-x-min clip-x-max
|
|
clip-y-min clip-y-max)
|
|
(values v1 v2))])
|
|
(when (and v1 v2)
|
|
(draw-rectangle (plot->dc v1) (plot->dc v2))))))
|
|
|
|
(define (in-bounds? v)
|
|
(or (not clipping?)
|
|
(point-in-bounds? v clip-x-min clip-x-max
|
|
clip-y-min clip-y-max)))
|
|
|
|
(define/public (put-text str v [anchor 'top-left] [angle 0]
|
|
#:outline? [outline? #f])
|
|
(when (and (vregular? v) (in-bounds? v))
|
|
(draw-text str (plot->dc v) anchor angle #:outline? outline?)))
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|
|
|
(define/public (put-glyphs vs symbol size)
|
|
(draw-glyphs (map (λ (v) (plot->dc v))
|
|
(filter (λ (v) (and (vregular? v) (in-bounds? v)))
|
|
vs))
|
|
symbol size))
|
|
|
|
(define/public (put-arrow v1 v2)
|
|
(when (and (vregular? v1) (vregular? v2) (in-bounds? v1))
|
|
(draw-arrow (plot->dc v1) (plot->dc v2))))
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|
|
|
(define/public (put-tick v r angle)
|
|
(when (and (vregular? v) (in-bounds? v))
|
|
(draw-tick (plot->dc v) r angle)))
|
|
))
|