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