sunterlib/scsh/scgame/scgamewidgets.scm

267 lines
8.0 KiB
Scheme

;;; scgamewidgets.scm - a scheme game library widgets
;; (needs scx-0.2 or scheme48-fb)
;;;
;;; Copyright (c) 2011-2012 Johan Ceuppens
;;;
;;; All rights reserved.
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;; 1. Redistributions of source code must retain the above copyright
;;; notice, this list of conditions and the following disclaimer.
;;; 2. Redistributions in binary form must reproduce the above copyright
;;; notice, this list of conditions and the following disclaimer in the
;;; documentation and/or other materials provided with the distribution.
;;; 3. The name of the authors may not be used to endorse or promote products
;;; derived from this software without specific prior written permission.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
;;; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
;;; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
;;; IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
;;; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
;;; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
;;; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
;;; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
;;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
;;; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
(load "scgame.scm")
;; for inits see scgame.scm
;; FIXME refactor and cleanup
;;
;; run (widget-tree-eventloop dpy win widget-tree)
;; widget tree
(define (make-widget-tree)
'())
(define (make-widget-tree-leaf widget)
(delay widget))
(define (widget-leaf? n)
(and (widget? n)(not (list? n))))
(define (make-widget-tree-node widgetlist)
(delay widgetlist))
(define (widget-node? n)
(and (not (widget? n))(list? n)))
(define (widget-tree-add! tree n)
(set! tree (append tree (list n))))
(define (widget-node-add! node n)
(set! node (append node (list n))))
;; throws backwards inner widget
(define (widget-node-collide? node x y)
(define (frec l)
(cond ((null? l) #f)
((list? (car l))
(frec (car l)))
((and (widget? (car l))
(>= x (((car l)'get-x)))
(<= x (+ (((car l)'get-x)))(((car l)'get-w)))
(>= y (((car l)'get-y)))
(<= y (+ (((car l)'get-y)))(((car l)'get-h))))
(car l))
(else (frec (cdr l)))))
(if (widget-node? node)
(for-each frec (force node))
#f))
(define (widget-leaf-collide? leaf x y)
(if (widget-leaf? leaf)
(cond ((and (widget? leaf)
(>= x ((leaf 'get-x)))
(<= x (+ ((leaf 'get-x)))((leaf 'get-w)))
(>= y ((leaf 'get-y)))
(<= y (+ ((leaf 'get-y)))((leaf 'get-h))))
#t))
#f))
(define (draw-widget-tree widget-tree)
(define (frec l)
(cond ((null? l) #f)
((list? (car l))
(frec (car l)))
((widget? (car l))
(((car l) 'draw)))
(else (frec (cdr l)))))
(if (widget-node? node)
(for-each frec (force node))
#f))
;; widgets
(define (make-scgame-widget)
(define (draw)
(display-msg "widget - draw - subclass responsability"))
(define (widget?)
#t)
(define (get-x)
(display-msg "widget - get-x - subclass responsability")
0)
(define (get-y)
(display-msg "widget - get-y - subclass responsability")
0)
(define (get-w)
(display-msg "widget - get-w - subclass responsability")
0)
(define (get-h)
(display-msg "widget - get-h - subclass responsability")
0)
(lambda (msg)
(cond ((eq? msg 'draw) draw)
((eq? msg 'widget?) widget?)
(else
(display-msg "subclass responsability")))))
(define (make-button-widget xx yy)
(let ((widget (make-scgame-widget))
(image #f) ;; pixel array
(pressed-image #f) ;; pixel array
(pressed #f)
(x xx)
(y yy)
(width 0)
(height 0))
(define (get-x)
x)
(define (get-y)
y)
(define (get-w)
w)
(define (get-h)
h)
(define (set-image win filename)
(set! image (((make-scimage2)'load-image) win filename))
(let ((wh (vector-ref (list->vector image) 1)))
(set! width (car wh))
(set! height (cadr wh))
))
(define (set-pressed-image win filename)
(set! pressed-image (((make-scimage2)'load-image) win filename))
(let ((wh (vector-ref (list->vector image) 1)))
(set! width (car wh))
(set! height (cadr wh))
))
(define (draw-pressed-image dpy win gc)
(init-sync-x-events dpy)
(map-window dpy win)
(draw-points dpy win gc (* width height) 0 0
(/ width 2) (/ height 2)))
;; NOTE : you can remap a button (image) to a new window win if you like
(define (draw-image dpy win gc)
(init-sync-x-events dpy)
(map-window dpy win)
(draw-points dpy win gc (* width height) 0 0
(/ width 2) (/ height 2)))
(define (draw-points dpy win gc count x y)
(if (zero? (modulo count 100))
(display-flush dpy))
(if (not (zero? count))
(let ((xf (floor (* (+ 1.2 x) width))) ; These lines center the picture
(yf (floor (* (+ 0.5 y) height))))
(draw-point dpy win gc (inexact->exact xf) (inexact->exact yf))
(draw-points dpy win gc ;; FIXME1
(- count 1)
(- (* y (+ 1 (sin (* 0.7 x))))
(* 1.2 (sqrt (abs x))))
(- 0.21 x)
width height))))
(define (draw)
(if pressed
(draw-image)
(draw-pressed-image))
(map-window dpy win))
(define (press!)
(press-button dpy win gc)
(set! pressed #t))
(define (release!)
(release-button dpy win gc)
(set! pressed #f))
(lambda (msg)
(cond ((eq? 'set-image) set-image)
((eq? 'set-pressed-image) set-pressed-image)
((eq? 'press!) press!)
((eq? 'release!) release!)
((eq? get-x) get-x)
((eq? get-y) get-y)
((eq? get-w) get-w)
((eq? get-h) get-h)
((eq? draw) draw)
(widget msg)
))))
;; This is the main loop you call on your window's
;; widget tree (see above)
(define (widget-tree-eventloop dpy win tree)
(let ((mousex 0))
(let ((mousey 0))
(let ((widget-tree tree))
(init-sync-x-events dpy)
(map-window dpy win)
(call-with-event-channel
dpy win (event-mask button-press)
(lambda (channel)
;; FIXME calibrate at 10 times or using nanosleep for your machine
(let loop ()
(if
(let ((e (receive channel)))
;; process events
(cond
((motion-event? e)
(set! mousex motion-event-x)
(set! mousey motion-event-y))
((map-event? e)
(map-window dpy map-event-window))
((unmap-event? e)
(unmap-window dpy unmap-event-window))
((button-event? e)
(let ((state button-event-state))
(let ((widget (widget-node-collide? widget-tree mousex mouse)))
(if state
((widget 'press!))
((widget 'release!))))))
((expose-event? e)
(expose-window dpy expose-event-window))
((destroy-widow-event? e)
(expose-window dpy destroy-window-event-window))
(else #f))
;; draw widgets in tree
(draw-widget-tree widget-tree)
))
(loop))))))))