GUI example
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Tony Garnock-Jones
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46ddb47050
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# Simple GUI experiments using Syndicate
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This directory contains UI experiments using
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[Syndicate](http://syndicate-lang.org/) and its OpenGL 2D support.
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Files:
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- `gui.rkt`: Main entry point. Run `racket gui.rkt` to run the demo.
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- `layout/`: A simple widget layout engine, loosely inspired by TeX's boxes-and-glue model.
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- `sizing.rkt`: TeX-like "dimensions", including "fills"
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- `layout.rkt`: Uses "dimensions" to specify "table layouts",
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which are then realized in terms of specified rectangle
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coordinates
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- `hsv.rkt`: Utility for converting HSV colors to RGB.
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Screenshot:
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#lang imperative-syndicate
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(require racket/set)
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(require data/order)
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(require srfi/19)
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(require (prefix-in i: 2htdp/image))
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(require (prefix-in p: pict))
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(require syndicate-gl/affine)
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(require "layout/main.rkt")
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(require "hsv.rkt")
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(require imperative-syndicate/bag)
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(require imperative-syndicate/pattern)
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(require/activate imperative-syndicate/drivers/gl-2d)
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;;---------------------------------------------------------------------------
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(define theme-font (make-parameter "Roboto"))
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(define theme-font-size (make-parameter 16))
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(define theme-title-font (make-parameter "Roboto Condensed"))
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(define theme-title-font-size (make-parameter 20))
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(define theme-title-font-color (make-parameter "white"))
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(define theme-title-bar-color (make-parameter (hsv->color 260 1 0.6)))
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(define theme-title-bar-selected-color (make-parameter (hsv->color 260 1 1)))
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(define theme-title-bar-height (make-parameter 48))
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(define theme-button-background-color (make-parameter (hsv->color 30 0.9 1)))
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(define theme-button-color (make-parameter "white"))
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(define theme-button-x-padding (make-parameter 40))
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(define theme-button-y-padding (make-parameter 24))
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(define theme-button-min-height (make-parameter 48))
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(define theme-window-border-width (make-parameter 8))
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(define theme-window-resize-corner-size (make-parameter 16))
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(define theme-menu-item-color (make-parameter "white"))
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(define theme-menu-item-background-color (make-parameter (hsv->color 240 1 0.8)))
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(define theme-menu-item-selected-background-color (make-parameter (hsv->color 345 1 1)))
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(define theme-menu-item-padding (make-parameter 16))
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(define theme-menu-separator-width (make-parameter 2))
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(define theme-menu-separator-color (make-parameter "white"))
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;;---------------------------------------------------------------------------
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(define (*width x)
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(cond [(i:image? x) (i:image-width x)]
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[(p:pict? x) (p:pict-width x)]
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[else (error '*width "Neither an image nor a pict: ~v" x)]))
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(define (*height x)
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(cond [(i:image? x) (i:image-height x)]
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[(p:pict? x) (p:pict-height x)]
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[else (error '*height "Neither an image nor a pict: ~v" x)]))
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(define (costume #:id [id #f] #:parent [parent-id #f] #:coordinate-map-id [coordinate-map-id #f] i)
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(define iw (*width i))
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(define ih (*height i))
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(define iaspect (/ iw ih))
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(lambda (z rect)
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(match-define (rectangle left top sw sh) rect)
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(define saspect (if (and (positive? sw) (positive? sh)) (/ sw sh) 1))
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(define-values (scale-w scale-h translate-x translate-y)
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(if (> saspect iaspect)
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(let ((scale-h (/ sw iaspect)))
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(values sw scale-h 0 (/ (- sh scale-h) 2)))
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(let ((scale-w (* sh iaspect)))
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(values scale-w sh (/ (- sw scale-w) 2) 0))))
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(sprite #:id (or id (gensym 'costume))
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#:parent parent-id
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z
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`((translate ,left ,top)
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(push-matrix (scale ,sw ,sh)
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,@(if id
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`((touchable ,id ,in-unit-square?))
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`())
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,@(if coordinate-map-id
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`((coordinate-map ,coordinate-map-id))
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`())
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(texture ,i
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,(- (/ translate-x scale-w))
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,(- (/ translate-y scale-h))
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,(/ sw scale-w)
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,(/ sh scale-h)
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))
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(render-children)))))
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(define (draggable-mixin touching? x y id-to-raise)
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(define (idle)
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(react (stop-when #:when (touching?)
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(message (mouse-event 'left-down (mouse-state $mx $my _ _ _)))
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(dragging (- mx (x)) (- my (y))))))
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(define (dragging dx dy)
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(when id-to-raise (send! (raise-widget id-to-raise)))
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(react (on (message (mouse-event 'motion (mouse-state $mx $my _ _ _)))
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(x (- mx dx))
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(y (- my dy)))
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(stop-when (message (mouse-event 'left-up _)) (idle))
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(stop-when (message (mouse-event 'leave _)) (idle))))
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(idle))
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(spawn #:name 'root-window
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(define c (costume #:id 'root (i:bitmap "oakura-beach-20081225.jpg")))
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(define/query-value touching? #f (touching 'root) #t)
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(on #:when (touching?) (message (mouse-event 'right-down (mouse-state $x $y _ _ _)))
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(send! (pop-up-menu-trigger 'system-menu x y 0 0.5 'right-up)))
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(during (window $width $height)
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(assert (c 0 (rectangle 0 0 width height)))))
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(define (button-underlay i)
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(define w (+ (*width i) (theme-button-x-padding)))
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(define h (max (+ (*height i) (theme-button-y-padding)) (theme-button-min-height)))
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(i:rectangle w h "solid" (theme-button-background-color)))
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;;---------------------------------------------------------------------------
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;; Protocol: Layout.
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;;---------------------------------------------------------------------------
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;; Roles:
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;;
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;; Layout Solver
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;; Responds to assertions of interest in layout solutions by
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;; computing layouts and asserting the resulting positions.
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;;
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;; (Observe LayoutSolution)+ ==>
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;; RequestedLayoutSize ==>
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;; ComputedLayoutSize ∧ LayoutSolution+
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;;
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;; Layout Observer
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;; Supplies any initial constraints on the overall layout size,
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;; and may observe the final overall computed layout size.
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;;
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;; RequestedLayoutSize ∧ (ComputedLayoutSize ==> 1)?
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;;
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;; Layout Participant
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;; Supplies constraints on an individual item to be laid out
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;; and monitors the resulting position decision for that item.
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;;
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;; LayoutSolution ==> 1
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;;---------------------------------------------------------------------------
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;; A LayoutSpec is one of
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;; - (horizontal-layout Any)
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;; - (vertical-layout Any)
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;; - (tabular-layout Nat Nat)
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;; where the first two use their keys for *ordering* peers relative to
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;; each other using datum-order, and the last uses the given row and
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;; column to place the item within an implicitly-sized grid layout.
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(struct horizontal-layout (key) #:transparent)
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(struct vertical-layout (key) #:transparent)
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(struct tabular-layout (row col) #:transparent)
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;; ASSERTION. A RequestedLayoutSize is a
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;; (requested-layout-size Any (Option (box-size (Option Sizing) (Option Sizing))))
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;; and describes overall constraints on the total size of the layout to be
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;; constructed. Supplying `size` as `#f` means that there is no constraint at all;
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;; otherwise, the `box-size` given is used as the exact dimensions of
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;; the layout, unless one or both of the dimensions of the `box-size`
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;; are given as `#f`, in which case there is no constraint for that
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;; dimension.
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(struct requested-layout-size (container-id size) #:transparent)
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;; ASSERTION. A ComputedLayoutSize is a
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;; (computed-layout-size Any BoxSize)
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;; and gives the concrete dimensions of the layout after layout
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;; computation has completed.
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(struct computed-layout-size (container-id size) #:transparent)
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;; ASSERTION. A LayoutSolution is a
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;; (layout-solution Any LayoutSpec BoxSize Rectangle)
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;; and denotes the computed bounds of a given item within a layout.
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;; TODO: introduce an item ID??
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(struct layout-solution (container-id
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spec
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size
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rectangle) #:transparent)
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;;---------------------------------------------------------------------------
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(struct layout-item (spec size) #:transparent)
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(define (layout-item-spec-key li)
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(define v (layout-item-spec li))
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(if (number? v) (exact->inexact v) v))
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(spawn #:name 'layout-driver
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(during/spawn (observe (layout-solution $container-id _ _ _))
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#:name (list 'layout container-id)
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(stop-when (asserted (observe (layout-solution container-id (horizontal-layout _) _ _)))
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(react (solve-hv-layout #f container-id)))
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(stop-when (asserted (observe (layout-solution container-id (vertical-layout _) _ _)))
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(react (solve-hv-layout #t container-id)))
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(stop-when (asserted (observe (layout-solution container-id (tabular-layout _ _) _ _)))
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(react (solve-tabular-layout container-id)))))
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(define (solve-hv-layout vertical? container-id)
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(field [items (set)])
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(if vertical?
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(query-set* items
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(observe (layout-solution container-id (vertical-layout $key) $size _))
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(layout-item key size))
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(query-set* items
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(observe (layout-solution container-id (horizontal-layout $key) $size _))
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(layout-item key size)))
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(define/dataflow ordered-items (sort (set->list (items))
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(order-<? datum-order)
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#:key layout-item-spec-key)
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#:default '())
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(define/dataflow table
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(if vertical?
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(map list (map layout-item-size (ordered-items)))
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(list (map layout-item-size (ordered-items)))))
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(solve-layout* container-id
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table
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(lambda (layout)
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(for [(item (ordered-items))
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(cell (if vertical? (map car layout) (car layout)))]
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(assert! (layout-solution container-id
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(if vertical?
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(vertical-layout (layout-item-spec item))
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(horizontal-layout (layout-item-spec item)))
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(layout-item-size item)
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cell))))))
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(define (merge-box-size existing computed)
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(match existing
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[#f computed]
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[(box-size h v)
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(box-size (or h (box-size-horizontal computed))
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(or v (box-size-vertical computed)))]))
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(define (solve-layout* container-id table on-layout)
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(during (requested-layout-size container-id $reqsize)
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(define/dataflow total-size (merge-box-size reqsize (table-sizing (table))))
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(assert (computed-layout-size container-id (total-size)))
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(define (total-width) (sizing-ideal (box-size-horizontal (total-size))))
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(define (total-height) (sizing-ideal (box-size-vertical (total-size))))
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(define/dataflow layout (table-layout (table) 0 0 (total-width) (total-height)) #:default '())
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(begin/dataflow
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(for [(a (in-bag (current-adhoc-assertions)))]
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(match a
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[(layout-solution (== container-id) _ _ _) (retract! a)]
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[_ (void)]))
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(on-layout (layout)))))
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(define (solve-tabular-layout container-id)
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(define/query-set items
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(observe (layout-solution container-id (tabular-layout $row $col) $size _))
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(layout-item (cons row col) size))
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(define/dataflow items-table
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(let* ((specs (map layout-item-spec (set->list (items))))
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(row-count (+ 1 (apply max -1 (map car specs))))
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(col-count (+ 1 (apply max -1 (map cdr specs))))
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(mtx (for/vector [(r row-count)] (make-vector col-count #f))))
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(for [(item (items))]
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(vector-set! (vector-ref mtx (car (layout-item-spec item)))
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(cdr (layout-item-spec item))
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item))
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mtx))
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(define/dataflow table
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(for/list [(row (items-table))]
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(for/list [(item row)]
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(if item (layout-item-size item) weak-fill-box-size))))
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(solve-layout* container-id
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table
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(lambda (layout)
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(define mtx (list->vector (map list->vector layout)))
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(for [(item (items))]
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(match-define (cons row col) (layout-item-spec item))
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(assert! (layout-solution container-id
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(tabular-layout row col)
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(layout-item-size item)
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(vector-ref (vector-ref mtx row) col)))))))
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;;---------------------------------------------------------------------------
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;; TODO: Having pop-up-menu-trigger be a message means that it's not
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;; possible to cancel or move the menu once it has been triggered.
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;; Consider using the "start" button in the corner to pop up a menu,
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;; following which the screen is resized before the menu is dismissed.
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;; Currently, the menu will continue to float in an incorrect location
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;; rather than following the screen resize. If, however, the trigger
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;; for a menu was an assertion, then the menu could track changes in
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;; its triggering parameters and could be repositioned without fuss.
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(struct pop-up-menu-trigger (menu-id x y x-pin y-pin release-event) #:transparent)
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(struct menu-separator (menu-id order) #:transparent)
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(struct menu-item (menu-id order image message) #:transparent)
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(spawn #:name 'pop-up-menu-driver
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(on (message (pop-up-menu-trigger $menu-id $x $y $x-pin $y-pin $release-event))
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(run-pop-up-menu menu-id x y x-pin y-pin release-event)))
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(define (run-pop-up-menu menu-id pop-up-cursor-x pop-up-cursor-y x-pin y-pin release-event)
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(define instance-id (list menu-id (gensym 'instance)))
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(define pad (theme-menu-item-padding))
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(define pad2 (* pad 2))
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(define normal (i:rectangle 1 1 "solid" (theme-menu-item-background-color)))
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(define highlight (i:rectangle 1 1 "solid" (theme-menu-item-selected-background-color)))
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(define separator (i:rectangle 1 1 "solid" (theme-menu-separator-color)))
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(spawn #:name instance-id
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(assert (requested-layout-size instance-id #f))
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(during (menu-item menu-id $order $sealed-image $msg)
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(define item-id (gensym 'item))
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(define im (seal-contents sealed-image))
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(define imsize (box-size (sizing (+ pad2 (*width im)) 0 0)
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(sizing (+ pad2 (*height im)) 0 0)))
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(during (layout-solution instance-id (vertical-layout order) imsize $rect)
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(match-define (rectangle left top width height) rect)
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(assert (sprite #:id item-id #:parent instance-id
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0
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`((translate ,left ,top)
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(push-matrix
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(scale ,width ,height)
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(touchable (,instance-id ,item-id ,msg) ,in-unit-square?)
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(texture ,(if (eq? (selected-item) item-id) highlight normal)))
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(push-matrix
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(translate ,pad ,pad)
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(scale ,(*width im) ,(*height im))
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(texture ,im)))))))
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(during (menu-separator menu-id $order)
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(define sep-id (gensym 'sep))
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(during (layout-solution instance-id (vertical-layout order)
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(box-size weak-fill-sizing
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(sizing (theme-menu-separator-width) 0 0))
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$rect)
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(match-define (rectangle left top width height) rect)
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(assert (sprite #:id sep-id #:parent instance-id
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0
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`((translate ,left ,top)
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(scale ,width ,height)
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(texture ,separator))))))
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(during (computed-layout-size instance-id $menu-size)
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(match-define (box-size (sizing menu-width _ _) (sizing menu-height _ _)) menu-size)
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(define offset-x (- pop-up-cursor-x (* x-pin (+ menu-width 2)) -1))
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(define offset-y (- pop-up-cursor-y (* y-pin (+ menu-height 2)) -1))
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(assert (sprite #:id instance-id
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-1
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`((translate ,offset-x ,offset-y)
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(render-children)))))
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(define/query-value selected-item #f (touching `(,instance-id ,$i ,_)) i)
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(define/query-value selected-msg #f (touching `(,instance-id ,_ ,$msg)) msg)
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(stop-when (message (mouse-event release-event _))
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(when (selected-item) (send! (selected-msg))))))
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;;---------------------------------------------------------------------------
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(define (system-text str [color #f])
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(i:text/font str (theme-font-size) (or color "white")
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(theme-font) 'default 'normal 'normal #f))
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(define (title-font-text str)
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(i:text/font str (theme-title-font-size) (theme-title-font-color)
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(theme-title-font) 'default 'normal 'normal #f))
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(define (menu-item/text menu-id order str message)
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(menu-item menu-id order (seal (system-text str (theme-menu-item-color))) message))
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;;---------------------------------------------------------------------------
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(struct window-state (window-id title state) #:transparent)
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(struct raise-widget (id) #:transparent)
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(struct top-widget (id) #:transparent)
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(define close-icon-i
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(parameterize ((theme-font-size (round (* 4/3 (theme-title-font-size)))))
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(system-text "×" (theme-title-font-color))))
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(define (window-frame id title backdrop-color
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#:close-icon? [close-icon? #t]
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#:parent [parent-id 'root])
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(define title-text-i (title-font-text title))
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(define title-text-w (i:image-width title-text-i))
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(define title-text-h (i:image-height title-text-i))
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(define (title-bar-i focus?) (i:rectangle 1 1 "solid"
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(if focus?
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(theme-title-bar-selected-color)
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(theme-title-bar-color))))
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(define close-icon-w (i:image-width close-icon-i))
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(define close-icon-h (i:image-height close-icon-i))
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(define gap (/ (- (theme-title-bar-height) close-icon-w) 2))
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(define backdrop (i:rectangle 1 1 "solid" backdrop-color))
|
||||
(lambda (z rect focus?)
|
||||
(match-define (rectangle left top width height) rect)
|
||||
(sprite #:id id
|
||||
#:parent parent-id
|
||||
z
|
||||
`((translate ,left ,top)
|
||||
(push-matrix (translate ,(- (theme-window-border-width))
|
||||
,(- (theme-title-bar-height)))
|
||||
(scale ,(+ width (* 2 (theme-window-border-width)))
|
||||
,(+ height (theme-title-bar-height) (theme-window-border-width)))
|
||||
(touchable (,id window-backdrop) ,in-unit-square?)
|
||||
(texture ,(title-bar-i focus?)))
|
||||
(push-matrix (translate 0 ,(- (theme-title-bar-height)))
|
||||
(scale ,width ,(theme-title-bar-height))
|
||||
(touchable (,id title-bar) ,in-unit-square?))
|
||||
(push-matrix (translate ,(- (+ width (theme-window-border-width))
|
||||
(theme-window-resize-corner-size))
|
||||
,(- (+ height (theme-window-border-width))
|
||||
(theme-window-resize-corner-size)))
|
||||
(scale ,(theme-window-resize-corner-size)
|
||||
,(theme-window-resize-corner-size))
|
||||
(touchable (,id resize-corner) ,in-unit-square?))
|
||||
,@(if close-icon?
|
||||
`((push-matrix
|
||||
(translate ,gap ,(- (/ (+ (theme-title-bar-height) close-icon-h) 2)))
|
||||
(scale ,close-icon-w ,close-icon-h)
|
||||
(touchable (,id close-icon) ,in-unit-square?)
|
||||
(texture ,close-icon-i)))
|
||||
`())
|
||||
(push-matrix (translate ,(/ (- width title-text-w) 2)
|
||||
,(- (/ (+ (theme-title-bar-height) title-text-h) 2)))
|
||||
(scale ,title-text-w ,title-text-h)
|
||||
(texture ,title-text-i))
|
||||
(push-matrix (scale ,width ,height)
|
||||
(texture ,backdrop))
|
||||
(render-children)))))
|
||||
|
||||
(define (open-window window-id window-title x y width height [backdrop-color (hsv->color 200 1 1)]
|
||||
#:resizable? [resizable? #t])
|
||||
(define c (window-frame window-id window-title backdrop-color))
|
||||
|
||||
(field [z (- (current-inexact-milliseconds))])
|
||||
(define/query-value touching-title-bar?
|
||||
#f (touching `(,window-id title-bar)) #t)
|
||||
(on-start (draggable-mixin touching-title-bar? x y window-id))
|
||||
|
||||
(when resizable?
|
||||
(define/query-value touching-resize-corner?
|
||||
#f (touching `(,window-id resize-corner)) #t)
|
||||
(on-start (draggable-mixin touching-resize-corner? width height window-id)))
|
||||
|
||||
(define/query-value touching-close-icon?
|
||||
#f (touching `(,window-id close-icon)) #t)
|
||||
(stop-when #:when (touching-close-icon?) (message (mouse-event 'left-up _)))
|
||||
|
||||
(on (message (raise-widget window-id))
|
||||
(z (- (current-inexact-milliseconds))))
|
||||
|
||||
(define/query-value focus? #f (top-widget window-id) #t)
|
||||
|
||||
(define/dataflow bounds (rectangle (x) (y) (width) (height)) #:default zero-rectangle)
|
||||
(assert (window-state window-id window-title (bounds)))
|
||||
(assert (c (z) (bounds) (focus?))))
|
||||
|
||||
(spawn #:name 'top-widget-monitor
|
||||
(local-require data/heap)
|
||||
|
||||
(define *widget-heap* (make-heap (lambda (a b) (<= (cdr a) (cdr b)))))
|
||||
(field [widget-heap-version 0])
|
||||
(define (widget-heap) (begin (widget-heap-version) *widget-heap*)) ;; gross hack
|
||||
;; ^ this is to cope with the use of mutable data in a field.
|
||||
;; Field update only registers damage if the field *changes*, as detected by `equal?`.
|
||||
(define (trigger-dependencies!) (widget-heap-version (+ (widget-heap-version) 1)))
|
||||
|
||||
(on (asserted (<sprite> $id 'root $z _))
|
||||
(heap-add! (widget-heap) (cons id z))
|
||||
(trigger-dependencies!))
|
||||
(on (retracted (<sprite> $id 'root $z _))
|
||||
(heap-remove! (widget-heap) (cons id z))
|
||||
(trigger-dependencies!))
|
||||
|
||||
(assert #:when (positive? (heap-count (widget-heap)))
|
||||
(top-widget (car (heap-min (widget-heap))))))
|
||||
|
||||
;;---------------------------------------------------------------------------
|
||||
|
||||
(struct button-click (id mouse-state) #:transparent)
|
||||
|
||||
(begin-for-declarations
|
||||
;; TODO: figure out what it is about (define (f #:x x) x) that
|
||||
;; mandates begin-for-declarations to hide it from syndicate/lang's
|
||||
;; local-expansion here :-(
|
||||
(define (pushbutton label-str x y [w #f] [h #f]
|
||||
#:shrink-x [shrink-x 0]
|
||||
#:id id
|
||||
#:coordinate-map-id [coordinate-map-id #f]
|
||||
#:parent parent-id
|
||||
#:trigger-event [trigger-event 'left-up])
|
||||
(define label (system-text label-str (theme-button-color)))
|
||||
(define i (i:overlay/align "middle" "middle" label (button-underlay label)))
|
||||
(define c (costume #:id id #:parent parent-id #:coordinate-map-id coordinate-map-id i))
|
||||
|
||||
(define/query-value touching? #f (touching id) #t)
|
||||
(on #:when (touching?) (message (mouse-event trigger-event $s))
|
||||
(send! (button-click id s)))
|
||||
(assert (c 0 (rectangle (x)
|
||||
(y)
|
||||
(or (and w (w)) (*width i))
|
||||
(or (and h (h)) (*height i)))))
|
||||
(box-size (sizing (*width i) 0 (* shrink-x (*width i))) (sizing (*height i) 0 0))))
|
||||
|
||||
;;---------------------------------------------------------------------------
|
||||
|
||||
(define (enforce-minimum f v)
|
||||
(begin/dataflow (when (< (f) v) (f v))))
|
||||
|
||||
(begin-for-declarations
|
||||
(define (message-box title init-x init-y body #:id id)
|
||||
(define msg (system-text body))
|
||||
(spawn #:name (list 'message-box id)
|
||||
(field [x init-x]
|
||||
[y init-y]
|
||||
[width (max 250 (*width msg))]
|
||||
[height (max 100 (*height msg))])
|
||||
(open-window id title x y width height #:resizable? #f)
|
||||
(assert ((costume #:parent id msg)
|
||||
0
|
||||
(rectangle (/ (- (width) (*width msg)) 2)
|
||||
(/ (- (height) (*height msg)) 2)
|
||||
(*width msg)
|
||||
(*height msg)))))))
|
||||
|
||||
(spawn #:name 'test-window
|
||||
|
||||
(field [x 140] [y 140] [width 400] [height 300])
|
||||
(open-window 'w "Window Title" x y width height)
|
||||
(enforce-minimum width 300)
|
||||
(enforce-minimum height 300)
|
||||
|
||||
(assert (menu-item/text 'testmenu 0 "First item" '(testmenu first)))
|
||||
(assert (menu-item/text 'testmenu 1 "Second item" '(testmenu second)))
|
||||
(assert (menu-item/text 'testmenu 2 "Third item" '(testmenu third)))
|
||||
|
||||
(during (window $width $height)
|
||||
(on (message `(testmenu ,$which))
|
||||
(define box-id (gensym 'box))
|
||||
(message-box #:id box-id
|
||||
(date->string (seconds->date (current-seconds))
|
||||
"Selected at ~3")
|
||||
(random width) (random height)
|
||||
(format "~a" which))))
|
||||
|
||||
(pushbutton "Click me"
|
||||
(lambda () 100)
|
||||
(lambda () 100)
|
||||
#:id 'click-me #:parent 'w #:trigger-event 'left-down)
|
||||
(on (message (button-click 'click-me (mouse-state $x $y _ _ _)))
|
||||
(send! (pop-up-menu-trigger 'testmenu x y 0 0.5 'left-up))))
|
||||
|
||||
;;---------------------------------------------------------------------------
|
||||
|
||||
(spawn #:name 'fullscreen-menu-item
|
||||
(field [fullscreen? #f])
|
||||
(assert (menu-item/text 'system-menu -1
|
||||
(if (fullscreen?)
|
||||
"Fullscreen ✓"
|
||||
"Fullscreen")
|
||||
'(system-menu toggle-fullscreen)))
|
||||
(assert (menu-separator 'system-menu -0.9))
|
||||
(on (message '(system-menu toggle-fullscreen))
|
||||
(fullscreen? (not (fullscreen?))))
|
||||
(assert #:when (fullscreen?) (gl-control 'fullscreen)))
|
||||
|
||||
(spawn #:name 'quit-menu-item
|
||||
(assert (menu-item/text 'system-menu 0 "Quit" '(system-menu quit)))
|
||||
(stop-when (message '(system-menu quit))
|
||||
(send! (gl-control 'stop)))
|
||||
(stop-when (message (key-event #\q #t _))
|
||||
(send! (gl-control 'stop))))
|
||||
|
||||
(spawn #:name 'toolbar
|
||||
|
||||
(field [window-width 0] [window-height 0])
|
||||
(on (asserted (window $w $h))
|
||||
(window-width w)
|
||||
(window-height h))
|
||||
|
||||
(define pad 4) ;;(theme-menu-item-padding))
|
||||
(define pad2 (* pad 2))
|
||||
|
||||
(assert (requested-layout-size 'toolbar (box-size (sizing (- (window-width) pad2) 0 0) #f)))
|
||||
(assert (observe (layout-solution 'toolbar
|
||||
(horizontal-layout '(0.0 0.0))
|
||||
weak-fill-box-size
|
||||
(discard))))
|
||||
|
||||
(during (computed-layout-size 'toolbar (box-size (sizing $w _ _) (sizing $h _ _)))
|
||||
(assert (sprite #:id 'toolbar #:parent #f
|
||||
-0.5
|
||||
`((translate 0 ,(- (window-height) h pad2))
|
||||
(push-matrix (scale ,(window-width) ,(+ h pad2))
|
||||
(touchable toolbar ,in-unit-square?)
|
||||
(texture ,(i:rectangle 1 1 "solid" "black")))
|
||||
(translate ,pad ,pad)
|
||||
(render-children))))))
|
||||
|
||||
(spawn #:name 'start-button
|
||||
(field [x 0] [y 0])
|
||||
(define reqsize
|
||||
(parameterize ((theme-button-y-padding 8)
|
||||
(theme-button-min-height 0))
|
||||
(pushbutton "Start" x y #:id 'start-button #:parent 'toolbar
|
||||
#:coordinate-map-id 'start-button
|
||||
#:trigger-event 'left-down)))
|
||||
(during (layout-solution 'toolbar (horizontal-layout '(-10.0 0.0)) reqsize
|
||||
(rectangle $l $t $w $h))
|
||||
(x l)
|
||||
(y t)
|
||||
(during (coordinate-map 'start-button $xform)
|
||||
(on (message (button-click 'start-button _))
|
||||
(define pt (- (transform-point xform 0+0i) 1+4i)) ;; padding + unoffset
|
||||
(send!
|
||||
(pop-up-menu-trigger 'system-menu (real-part pt) (imag-part pt) 0 1 'left-up))))))
|
||||
|
||||
(spawn #:name 'window-list-monitor
|
||||
(during/spawn (window-state $id $title _)
|
||||
#:name (list 'window-list id)
|
||||
(field [x 0] [y 0] [width #f] [height #f])
|
||||
(define reqsize
|
||||
(parameterize ((theme-button-y-padding 8)
|
||||
(theme-button-min-height 0)
|
||||
(theme-button-background-color (hsv->color 240 1 0.6)))
|
||||
(pushbutton title x y width height #:id (list 'window-list id) #:parent 'toolbar
|
||||
#:shrink-x 1
|
||||
#:trigger-event 'left-down)))
|
||||
(during (layout-solution 'toolbar (horizontal-layout `(-5.0 ,id)) reqsize
|
||||
(rectangle $l $t $w $h))
|
||||
(begin (x l) (y t) (width w) (height h))
|
||||
(during (top-widget id)
|
||||
(assert (sprite #:id (list 'window-list id 'highlight)
|
||||
#:parent (list 'window-list id)
|
||||
0
|
||||
`((translate 0 ,(- h 1))
|
||||
(scale ,w 1)
|
||||
(texture ,(i:rectangle 1 1 "solid" "white"))))))
|
||||
(on (message (button-click (list 'window-list id) _))
|
||||
(send! (raise-widget id))))))
|
||||
|
||||
(spawn #:name 'clock
|
||||
(field [now (current-seconds)])
|
||||
(on (message (frame-event _ $timestamp _ _))
|
||||
(define new (current-seconds))
|
||||
(when (not (= new (now))) (now new)))
|
||||
(define/dataflow now-im (system-text (date->string (seconds->date (now)) "~a ~b ~d, ~3"))
|
||||
#:default i:empty-image)
|
||||
(during (layout-solution 'toolbar (horizontal-layout '(10.0 0.0))
|
||||
(box-size (sizing (*width (now-im)) 0 0)
|
||||
(sizing (*height (now-im)) 0 0))
|
||||
(rectangle $l $t $w $h))
|
||||
(assert (sprite #:id 'clock #:parent 'toolbar
|
||||
0
|
||||
`((translate ,l ,(+ t (/ (- h (*height (now-im))) 2)))
|
||||
(scale ,(*width (now-im)) ,(*height (now-im)))
|
||||
(texture ,(now-im)))))))
|
||||
|
||||
(spawn-gl-2d-driver)
|
||||
|
|
@ -0,0 +1,29 @@
|
|||
#lang racket/base
|
||||
|
||||
(provide fmod
|
||||
hsv->color
|
||||
color-by-hash)
|
||||
|
||||
(require 2htdp/image)
|
||||
|
||||
(define (fmod a b)
|
||||
(- a (* b (truncate (/ a b)))))
|
||||
|
||||
(define (hsv->color h s v)
|
||||
(define h* (fmod (/ h 60.0) 6))
|
||||
(define chroma (* v s))
|
||||
(define x (* chroma (- 1 (abs (- (fmod h* 2) 1)))))
|
||||
(define-values (r g b)
|
||||
(cond
|
||||
[(< h* 1) (values chroma x 0)]
|
||||
[(< h* 2) (values x chroma 0)]
|
||||
[(< h* 3) (values 0 chroma x)]
|
||||
[(< h* 4) (values 0 x chroma)]
|
||||
[(< h* 5) (values x 0 chroma)]
|
||||
[else (values chroma 0 x)]))
|
||||
(define m (- v chroma))
|
||||
(define (scale x) (inexact->exact (truncate (* 255 (+ x m)))))
|
||||
(make-color (scale r) (scale g) (scale b)))
|
||||
|
||||
(define (color-by-hash v)
|
||||
(hsv->color (* 360.0 (/ (bitwise-and (equal-hash-code v) 16777215) 16777216.0)) 1 1))
|
||||
|
|
@ -0,0 +1,191 @@
|
|||
#lang racket/base
|
||||
;; Tabular layout
|
||||
|
||||
(provide table-sizing
|
||||
table-layout)
|
||||
|
||||
(require racket/match)
|
||||
(require "sizing.rkt")
|
||||
|
||||
(module+ test (require rackunit))
|
||||
|
||||
;;---------------------------------------------------------------------------
|
||||
|
||||
(define (transpose rows)
|
||||
(if (null? rows)
|
||||
'()
|
||||
(apply map list rows)))
|
||||
|
||||
(define (swedish-round x)
|
||||
(floor (+ x 1/2)))
|
||||
|
||||
;;---------------------------------------------------------------------------
|
||||
|
||||
(define (table-sizing box-sizes)
|
||||
(box-size (sizing-sum (table-column-widths box-sizes))
|
||||
(sizing-sum (table-row-heights box-sizes))))
|
||||
|
||||
(define (table-row-heights box-sizes)
|
||||
(map transverse-sizing (extract box-size-vertical box-sizes)))
|
||||
|
||||
(define (table-column-widths box-sizes)
|
||||
(map transverse-sizing (extract box-size-horizontal (transpose box-sizes))))
|
||||
|
||||
(define (extract acc mtx)
|
||||
(map (lambda (r) (map acc r)) mtx))
|
||||
|
||||
(define (transverse-sizing sizings)
|
||||
(define-values (lb-v lb-f) (transverse-bound sizings sizing-shrink - max))
|
||||
(define-values (ub-v ub-f) (transverse-bound sizings sizing-stretch + min))
|
||||
(let* ((ideal-v (foldl max 0 (map sizing-ideal sizings)))
|
||||
(ideal-v (if ub-v (min ideal-v ub-v) ideal-v))
|
||||
(ideal-v (if lb-v (max ideal-v lb-v) ideal-v)))
|
||||
(sizing ideal-v
|
||||
(if ub-v (- ub-v ideal-v) ub-f)
|
||||
(if lb-v (- ideal-v lb-v) lb-f))))
|
||||
|
||||
(define (transverse-bound sizings sizing-accessor minus-or-plus max-or-min)
|
||||
(define vals (for/list [(s sizings) #:when (number? (sizing-accessor s))]
|
||||
(minus-or-plus (sizing-ideal s) (sizing-accessor s))))
|
||||
(values (and (pair? vals) (apply max-or-min vals))
|
||||
(foldl fill-max 0 (filter fill? (map sizing-accessor sizings)))))
|
||||
|
||||
;;---------------------------------------------------------------------------
|
||||
|
||||
(define (table-layout box-sizes top left width height #:round [round? #t])
|
||||
(define row-sizings (table-row-heights box-sizes))
|
||||
(define col-sizings (table-column-widths box-sizes))
|
||||
(define row-heights (compute-concrete-adjacent-sizes row-sizings height))
|
||||
(define col-widths (compute-concrete-adjacent-sizes col-sizings width))
|
||||
(define local-round (if round? swedish-round values))
|
||||
(define-values (_bot rows-rev)
|
||||
(for/fold [(top top) (rows-rev '())] [(row-height row-heights)]
|
||||
(define next-top (+ top row-height))
|
||||
(define rounded-top (local-round top))
|
||||
(define rounded-height (- (local-round next-top) rounded-top))
|
||||
(define-values (_right cells-rev)
|
||||
(for/fold [(left left) (cells-rev '())] [(col-width col-widths)]
|
||||
(define next-left (+ left col-width))
|
||||
(define rounded-left (local-round left))
|
||||
(define rounded-width (- (local-round next-left) rounded-left))
|
||||
(values next-left
|
||||
(cons (rectangle rounded-left
|
||||
rounded-top
|
||||
rounded-width
|
||||
rounded-height)
|
||||
cells-rev))))
|
||||
(values next-top
|
||||
(cons (reverse cells-rev) rows-rev))))
|
||||
(reverse rows-rev))
|
||||
|
||||
(define (compute-concrete-adjacent-sizes sizings actual-bound)
|
||||
(define ideal-total (foldl + 0 (map sizing-ideal sizings)))
|
||||
(define-values (available-slop sizing-give apply-give)
|
||||
(if (<= ideal-total actual-bound)
|
||||
(values (- actual-bound ideal-total) sizing-stretch +)
|
||||
(values (- ideal-total actual-bound) sizing-shrink -)))
|
||||
(define total-give (foldl fill+ 0 (map sizing-give sizings)))
|
||||
(if (number? total-give)
|
||||
(let ((scale (if (zero? total-give) 0 (/ available-slop total-give))))
|
||||
(map (lambda (s)
|
||||
;; numeric total-give ⇒ no fills for any give in the list
|
||||
(apply-give (sizing-ideal s) (* (sizing-give s) scale)))
|
||||
sizings))
|
||||
(let* ((weight (fill-weight total-give))
|
||||
(rank (fill-rank total-give))
|
||||
(scale (if (zero? weight) 0 (/ available-slop weight))))
|
||||
(map (lambda (s)
|
||||
(match (sizing-give s)
|
||||
[(fill w (== rank)) (apply-give (sizing-ideal s) (* w scale))]
|
||||
[_ (sizing-ideal s)]))
|
||||
sizings))))
|
||||
|
||||
;;---------------------------------------------------------------------------
|
||||
|
||||
(module+ test
|
||||
(check-equal? (transpose '((1 2 3) (4 5 6) (7 8 9))) '((1 4 7) (2 5 8) (3 6 9)))
|
||||
(check-equal? (swedish-round 0.1) 0.0)
|
||||
(check-equal? (swedish-round 0.5) 1.0)
|
||||
(check-equal? (swedish-round 0.9) 1.0)
|
||||
(check-equal? (swedish-round 1.1) 1.0)
|
||||
(check-equal? (swedish-round 1.5) 2.0)
|
||||
(check-equal? (swedish-round 1.9) 2.0))
|
||||
|
||||
(module+ test
|
||||
(define s211 (sizing 2 1 1))
|
||||
(define s0f0 (sizing 0 weak-fill 0))
|
||||
(define b22 (box-size s211 s211))
|
||||
(define b42 (box-size (sizing 4 1 1) s211))
|
||||
(define b62 (box-size (sizing 6 1 1) s211))
|
||||
(define b00 (box-size s0f0 s0f0))
|
||||
|
||||
(define t1 (list (list b22 b22 b00 b22)
|
||||
(list b22 b22 b00 b22)
|
||||
(list b22 b22 b00 b22)))
|
||||
|
||||
(define t2 (list (list b22 b22 b22)
|
||||
(list b22 b00 b22)
|
||||
(list b22 b22 b22)))
|
||||
|
||||
(define t3 (list (list b22 b42 b22)
|
||||
(list b22 b00 b22)
|
||||
(list b22 b22 b22)))
|
||||
|
||||
(define t4 (list (list b22 b62 b22)
|
||||
(list b22 b00 b22)
|
||||
(list b22 b22 b22)))
|
||||
|
||||
(check-equal? (table-sizing t1)
|
||||
(box-size (sizing 6 weak-fill 3)
|
||||
(sizing 6 3 3)))
|
||||
|
||||
(check-equal? (table-sizing t2)
|
||||
(box-size (sizing 6 3 3)
|
||||
(sizing 6 3 3)))
|
||||
|
||||
;; Is this sane?
|
||||
(check-equal? (table-sizing t3)
|
||||
(box-size (sizing 7 2 2)
|
||||
(sizing 6 3 3)))
|
||||
|
||||
;; Is this sane?
|
||||
(check-equal? (table-sizing t4)
|
||||
(box-size (sizing 9 0 2)
|
||||
(sizing 6 3 3)))
|
||||
|
||||
(check-equal? (table-layout t1 0 0 20 20)
|
||||
(list (list (rectangle 0 0 2 7)
|
||||
(rectangle 2 0 2 7)
|
||||
(rectangle 4 0 14 7)
|
||||
(rectangle 18 0 2 7))
|
||||
(list (rectangle 0 7 2 6)
|
||||
(rectangle 2 7 2 6)
|
||||
(rectangle 4 7 14 6)
|
||||
(rectangle 18 7 2 6))
|
||||
(list (rectangle 0 13 2 7)
|
||||
(rectangle 2 13 2 7)
|
||||
(rectangle 4 13 14 7)
|
||||
(rectangle 18 13 2 7))))
|
||||
|
||||
(check-equal? (table-layout t2 0 0 20 20)
|
||||
(list (list (rectangle 0 0 7 7)
|
||||
(rectangle 7 0 6 7)
|
||||
(rectangle 13 0 7 7))
|
||||
(list (rectangle 0 7 7 6)
|
||||
(rectangle 7 7 6 6)
|
||||
(rectangle 13 7 7 6))
|
||||
(list (rectangle 0 13 7 7)
|
||||
(rectangle 7 13 6 7)
|
||||
(rectangle 13 13 7 7))))
|
||||
|
||||
;; Is this sane?
|
||||
(check-equal? (table-layout t3 0 0 20 20)
|
||||
(list (list (rectangle 0 0 9 7)
|
||||
(rectangle 9 0 3 7)
|
||||
(rectangle 12 0 8 7))
|
||||
(list (rectangle 0 7 9 6)
|
||||
(rectangle 9 7 3 6)
|
||||
(rectangle 12 7 8 6))
|
||||
(list (rectangle 0 13 9 7)
|
||||
(rectangle 9 13 3 7)
|
||||
(rectangle 12 13 8 7)))))
|
||||
|
|
@ -0,0 +1,8 @@
|
|||
#lang racket/base
|
||||
;; Layout, based loosely on TeX's boxes-and-glue model.
|
||||
|
||||
(require "sizing.rkt")
|
||||
(require "layout.rkt")
|
||||
|
||||
(provide (all-from-out "sizing.rkt")
|
||||
(all-from-out "layout.rkt"))
|
||||
|
|
@ -0,0 +1,150 @@
|
|||
#lang racket/base
|
||||
;; Dimension sizing, based loosely on TeX's boxes-and-glue model.
|
||||
|
||||
(provide (struct-out fill)
|
||||
(struct-out sizing)
|
||||
(struct-out box-size)
|
||||
(struct-out rectangle)
|
||||
|
||||
weak-fill
|
||||
zero-sizing
|
||||
weak-fill-sizing
|
||||
zero-box-size
|
||||
weak-fill-box-size
|
||||
zero-rectangle
|
||||
|
||||
fill+
|
||||
fill-max
|
||||
fill-min
|
||||
fill-scale
|
||||
fill-weaken
|
||||
|
||||
sizing-contains?
|
||||
sizing-min
|
||||
sizing-max
|
||||
sizing-overlap?
|
||||
sizing-scale
|
||||
sizing-weaken
|
||||
sizing-pad
|
||||
sizing-adjust-ideal
|
||||
sizing-sum
|
||||
|
||||
box-size-weaken)
|
||||
|
||||
(require racket/match)
|
||||
|
||||
;;---------------------------------------------------------------------------
|
||||
|
||||
;; A Fill is one of
|
||||
;; - a Nat, a fixed amount of space
|
||||
;; - a (fill Nat Nat), a potentially infinite amount of space
|
||||
(struct fill (weight rank) #:transparent)
|
||||
|
||||
;; A Sizing is a (sizing Nat Fill Fill)
|
||||
(struct sizing (ideal stretch shrink) #:transparent)
|
||||
|
||||
;; A BoxSize is a (box-size Sizing Sizing)
|
||||
(struct box-size (horizontal vertical) #:transparent)
|
||||
|
||||
;; A Rectangle is a (rectangle Nat Nat BoxSize)
|
||||
(struct rectangle (left top width height) #:transparent)
|
||||
|
||||
;;---------------------------------------------------------------------------
|
||||
|
||||
;; A very weak fill.
|
||||
(define weak-fill (fill 1 -1))
|
||||
|
||||
(define zero-sizing (sizing 0 0 0))
|
||||
|
||||
(define weak-fill-sizing (sizing 0 weak-fill 0))
|
||||
|
||||
(define zero-box-size (box-size zero-sizing zero-sizing))
|
||||
|
||||
(define weak-fill-box-size (box-size weak-fill-sizing weak-fill-sizing))
|
||||
|
||||
(define zero-rectangle (rectangle 0 0 0 0))
|
||||
|
||||
;;---------------------------------------------------------------------------
|
||||
|
||||
;; (Nat Nat -> Nat) -> (Fill Fill -> Fill)
|
||||
(define ((fill-binop op) a b)
|
||||
(match* (a b)
|
||||
[((? number?) (? number?)) (op a b)]
|
||||
[((? number?) (? fill?)) b]
|
||||
[((? fill?) (? number?)) a]
|
||||
[((fill w1 r1) (fill w2 r2))
|
||||
(cond [(= r1 r2) (fill (op w1 w2) r1)]
|
||||
[(> r1 r2) (fill w1 r1)]
|
||||
[(< r1 r2) (fill w2 r2)])]))
|
||||
|
||||
;; Fill Fill -> Fill
|
||||
(define fill+ (fill-binop +))
|
||||
(define fill-max (fill-binop max))
|
||||
(define (fill-min a b)
|
||||
(if (and (number? a) (number? b))
|
||||
(min a b)
|
||||
0))
|
||||
|
||||
(define (fill-scale f scale)
|
||||
(if (number? f)
|
||||
(* f scale)
|
||||
f))
|
||||
|
||||
(define (fill-weaken f w r)
|
||||
(if (fill? f)
|
||||
(fill w r)
|
||||
f))
|
||||
|
||||
(define (sizing-contains? s v)
|
||||
(match-define (sizing x x+ x-) s)
|
||||
(cond [(>= v x) (if (number? x+) (<= v (+ x x+)) #t)]
|
||||
[(<= v x) (if (number? x-) (>= v (- x x-)) #t)]))
|
||||
|
||||
(define (sizing-min s)
|
||||
(match (sizing-shrink s)
|
||||
[(? number? n) (- (sizing-ideal s) n)]
|
||||
[(? fill?) -inf.0]))
|
||||
|
||||
(define (sizing-max s)
|
||||
(match (sizing-stretch s)
|
||||
[(? number? n) (+ (sizing-ideal s) n)]
|
||||
[(? fill?) +inf.0]))
|
||||
|
||||
(define (sizing-overlap? x y)
|
||||
(define largest-min (max (sizing-min x) (sizing-min y)))
|
||||
(define smallest-max (min (sizing-max x) (sizing-max y)))
|
||||
(< largest-min smallest-max))
|
||||
|
||||
(define (sizing-scale s scale)
|
||||
(match-define (sizing x x+ x-) s)
|
||||
(sizing (* x scale) (fill-scale x+ scale) (fill-scale x- scale)))
|
||||
|
||||
(define (sizing-weaken s
|
||||
[stretch-weight 1]
|
||||
[stretch-rank 0]
|
||||
[shrink-weight stretch-weight]
|
||||
[shrink-rank stretch-rank])
|
||||
(match-define (sizing x x+ x-) s)
|
||||
(sizing x
|
||||
(fill-weaken x+ stretch-weight stretch-rank)
|
||||
(fill-weaken x- shrink-weight shrink-rank)))
|
||||
|
||||
(define (sizing-pad s amount)
|
||||
(match-define (sizing x x+ x-) s)
|
||||
(sizing (+ x amount) x+ x-))
|
||||
|
||||
(define (sizing-adjust-ideal s i)
|
||||
(match-define (sizing x x+ x-) s)
|
||||
(sizing i
|
||||
(if (fill? x+) x+ (+ x+ (- x i)))
|
||||
(if (fill? x-) x- (- x- (- x i)))))
|
||||
|
||||
(define (sizing-sum sizings)
|
||||
(sizing (foldl + 0 (map sizing-ideal sizings))
|
||||
(foldl fill+ 0 (map sizing-stretch sizings))
|
||||
(foldl fill+ 0 (map sizing-shrink sizings))))
|
||||
|
||||
(define (box-size-weaken bs [weight 1] [rank 0])
|
||||
(match-define (box-size h v) bs)
|
||||
(box-size (sizing-weaken h weight rank)
|
||||
(sizing-weaken v weight rank)))
|
||||
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Reference in New Issue