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(define (vg:obj-get-extents obj)
(let ((type (vg:obj-type obj)))
(case type
((r)(vg:rect-get-extents obj)))))
(define (vg:rect-get-extents obj)
(vg:obj-pts obj)) ;; extents are just the points for a rectangle
;;======================================================================
;; components
;;======================================================================
;; add obj to comp
;;
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(define (vg:obj-get-extents obj)
(let ((type (vg:obj-type obj)))
(case type
((r)(vg:rect-get-extents obj)))))
(define (vg:rect-get-extents obj)
(vg:obj-pts obj)) ;; extents are just the points for a rectangle
(define (vg:grow-rect borderx bordery x1 y1 x2 y2)
(list
(- x1 borderx)
(- y1 bordery)
(+ x2 borderx)
(+ y2 bordery)))
;;======================================================================
;; components
;;======================================================================
;; add obj to comp
;;
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;; get component from drawing (look in apropriate lib) given libname and compname
(define (vg:get-component drawing libname compname)
(let* ((lib (hash-table-ref (vg:drawing-libs drawing) libname))
(inst (hash-table-ref (vg:lib-comps lib) compname)))
inst))
(define (vg:component-get-extents comp)
(let ((llx #f)
(lly #f)
(ulx #f)
(uly #f)
(objs (vg:comp-objs comp)))
(for-each
(lambda (obj)
(let* ((extents (vg:get-extents obj))
(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 llx))(set! llx ollx))
(if (or (not ulx)(< ollx llx))(set! llx ollx))
(if (or (not uly)(< ollx llx))(set! llx ollx))))
objs)
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;; get component from drawing (look in apropriate lib) given libname and compname
(define (vg:get-component drawing libname compname)
(let* ((lib (hash-table-ref (vg:drawing-libs drawing) libname))
(inst (hash-table-ref (vg:lib-comps lib) compname)))
inst))
(define (vg:components-get-extents . comps)
(let ((llx #f)
(lly #f)
(ulx #f)
(uly #f))
(for-each
(lambda (comp)
(let ((objs (vg:comp-objs comp)))
(for-each
(lambda (obj)
(let* ((extents (vg:obj-get-extents obj))
(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))))
objs)))
comps)
(list llx lly ulx uly)))
;;======================================================================
;; libraries
;;======================================================================
;; register lib with drawing
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