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;;
;; Copyright 2016 Matthew Welland.
;;
;; This program is made available under the GNU GPL version 2.0 or
;; greater. See the accompanying file COPYING for details.
;;
;; This program is distributed WITHOUT ANY WARRANTY; without even the
;; implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;; PURPOSE.
;; strftime('%m/%d/%Y %H:%M:%S','now','localtime')
(use defstruct)
(declare (unit vg))
(use canvas-draw iup)
(import canvas-draw-iup)
;; structs
;;
(defstruct vg:lib comps)
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;;
;; Copyright 2016 Matthew Welland.
;;
;; This program is made available under the GNU GPL version 2.0 or
;; greater. See the accompanying file COPYING for details.
;;
;; This program is distributed WITHOUT ANY WARRANTY; without even the
;; implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;; PURPOSE.
;; strftime('%m/%d/%Y %H:%M:%S','now','localtime')
(use defstruct srfi-1)
(declare (unit vg))
(use canvas-draw iup)
(import canvas-draw-iup)
;; structs
;;
(defstruct vg:lib comps)
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text: (vg:obj-text obj)
line-color: (vg:obj-line-color obj)
font: (vg:obj-font obj)))
(pts (vg:obj-pts obj)))
(vg:obj-pts-set! res (vg:drawing-inst-apply-scale-offset drawing inst pts))
(vg:drawing-cache-set! drawing (cons res (vg:drawing-cache drawing) ))
res))
;;======================================================================
;; Unravel and draw the objects
;;======================================================================
(define (vg:draw-obj drawing obj)
(print "obj type: " (vg:obj-type obj))
(case (vg:obj-type obj)
((r)(vg:draw-rect drawing obj))))
;; given a rect obj draw it on the canvas applying first the drawing
;; scale and offset
;;
(define (vg:draw-rect drawing obj)
(let* ((cnv (vg:drawing-cnv drawing))
(pts (vg:drawing-apply-scale drawing (vg:obj-pts obj)))
(llx (car pts))
(lly (cadr pts))
(ulx (caddr pts))
(uly (cadddr pts)))
(print "pts: " pts)
(canvas-rectangle! cnv llx ulx lly uly)))
(define (vg:draw drawing)
(let ((insts (vg:drawing-insts drawing)))
(for-each
(lambda (inst)
(let* ((libname (vg:inst-libname inst))
(compname (vg:inst-compname inst))
(comp (vg:get-component drawing libname compname)))
(print "comp: " comp)
(for-each
(lambda (obj)
(print "obj: " (vg:obj-pts obj))
(let ((obj-xfrmd (vg:map-obj drawing inst obj)))
(print "obj-xfrmd: " (vg:obj-pts obj-xfrmd))
(vg:draw-obj drawing obj-xfrmd))) ;;
(vg:comp-objs comp))))
(hash-table-values insts))))
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text: (vg:obj-text obj)
line-color: (vg:obj-line-color obj)
font: (vg:obj-font obj)))
(pts (vg:obj-pts obj)))
(vg:obj-pts-set! res (vg:drawing-inst-apply-scale-offset drawing inst pts))
(vg:drawing-cache-set! drawing (cons res (vg:drawing-cache drawing) ))
res))
;;======================================================================
;; instances
;;======================================================================
(define (vg:instances-get-extents drawing . instance-names)
(let ((xtnt-lst (vg:draw drawing #f))
(llx #f)
(lly #f)
(ulx #f)
(uly #f))
(for-each
(lambda (extents)
(let* ((ollx (list-ref extents 0))
(olly (list-ref extents 1))
(oulx (list-ref extents 2))
(ouly (list-ref extents 3)))
(if (or (not llx)(< ollx llx))(set! llx ollx))
(if (or (not lly)(< olly lly))(set! lly olly))
(if (or (not ulx)(> oulx ulx))(set! ulx oulx))
(if (or (not uly)(> ouly uly))(set! uly ouly))))
xtnt-lst)
(list llx lly ulx uly)))
;;======================================================================
;; Unravel and draw the objects
;;======================================================================
;; with get-extents = #t return the extents
;; with draw = #f don't actually draw the object
;;
(define (vg:draw-obj drawing obj #!key (draw #t))
(print "obj type: " (vg:obj-type obj))
(case (vg:obj-type obj)
((r)(vg:draw-rect drawing obj draw: draw))))
;; given a rect obj draw it on the canvas applying first the drawing
;; scale and offset
;;
(define (vg:draw-rect drawing obj #!key (draw #t))
(let* ((cnv (vg:drawing-cnv drawing))
(pts (vg:drawing-apply-scale drawing (vg:obj-pts obj)))
(llx (car pts))
(lly (cadr pts))
(ulx (caddr pts))
(uly (cadddr pts)))
(if draw (canvas-rectangle! cnv llx ulx lly uly))
pts)) ;; return extents
(define (vg:draw drawing draw-mode . instnames)
(let ((insts (vg:drawing-insts drawing))
(res '()))
(for-each
(lambda (instname)
(let* ((inst (hash-table-ref insts instname))
(libname (vg:inst-libname inst))
(compname (vg:inst-compname inst))
(comp (vg:get-component drawing libname compname)))
(print "comp: " comp)
(for-each
(lambda (obj)
(print "obj: " (vg:obj-pts obj))
(let ((obj-xfrmd (vg:map-obj drawing inst obj)))
(print "obj-xfrmd: " (vg:obj-pts obj-xfrmd))
(set! res (cons (vg:draw-obj drawing obj-xfrmd draw: draw-mode) res)))) ;;
(vg:comp-objs comp))))
(if (null? instnames)
(hash-table-keys insts)
instnames))
res)) ;; (hash-table-values insts))))
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