Megatest

	      (begin
		(for-each
		 (lambda (fieldname) ;; fields
		   (let ((all-dat-qrystr (conc "SELECT " timef "," varfn "," valfn " FROM " tablen " WHERE " varfn "='" fieldname "' AND " timef " >= " tstart " AND " timef " <= " tend " ORDER BY " timef " ASC"))
			 (zeroth-point   (conc "SELECT " timef "," varfn "," valfn " FROM " tablen " WHERE " varfn "='" fieldname "' AND " timef " < " tstart " LIMIT 1")))
		     (print "all-dat-qrystr: " all-dat-qrystr)
		     (hash-table-set! res-ht fieldname ;; (fetch-rows (sql db qrystr)))))
				      (reverse
				       (sqlite3:fold-row
					(lambda (res t var val)
					  (cons (vector t var val) res))
					'() db all-dat-qrystr)))
		     (let ((zeropt (handle-exceptions
				    exn
				    #f
				    (sqlite3:first-row db all-dat-qrystr))))
		       (if zeropt ;; NOTE: Add zeropt to the beginning of the list as the list was reversed above.
			   (hash-table-set! res-ht
					    fieldname
					    (cons
					     (apply vector tstart (cdr zeropt))						    
					     (hash-table-ref/default res-ht fieldname '())))))))
		 fields)
		res-ht)
	      #f)))))
  
;; graph data 
;;  tsc=timescale, tfn=function; time->x
;;
(define (dboard:graph commondat tabdat tabnum llx lly ulx uly tstart tend tsc tfn compname cmargin)
  (let* ((dwg (dboard:tabdat-drawing tabdat))
	 (lib (vg:get/create-lib dwg "runslib"))
	 (cnv (dboard:tabdat-cnv tabdat))
	 (dur (- tstart tend)) ;; time duration
	 (cmp (vg:get-component dwg "runslib" compname))
	 (cfg (configf:get-section *configdat* "graph"))
	 (stdcolor (vg:rgb->number 120 130 140)))
    (vg:add-obj-to-comp
     cmp 
     (vg:make-rect-obj llx lly ulx uly))
    (for-each 
     (lambda (cf)
       (let* ((alldat  (dboard:graph-read-data (cadr cf) tstart tend)))
	 (if alldat
	     (for-each
	      (lambda (fieldn)
		(let* ((dat     (hash-table-ref alldat fieldn ))
		       (vals    (map (lambda (x)(vector-ref x 2)) dat)))
		  (if (not (null? vals))
		      (let* ((maxval   (apply max vals))
			     (minval   (apply min vals))
			     (yoff     (- lly minval))
			     (deltaval (- maxval minval))
			     (yscale   (/ (- uly lly)(if (eq? deltaval 0) 1 deltaval)))
			     (yfunc    (lambda (y)(* (+ y yoff) yscale))))
			;; (print (car cf) ": " (hash-table->alist
			(fold 
			 (lambda (next prev)  ;; #(time ? val) #(time ? val)
			   (if prev
			       (let* ((last-tval  (tfn   (vector-ref prev 0)))
				      (last-yval  (+ lly (* yscale (vector-ref prev 2))))
				      (curr-tval  (tfn   (vector-ref next 0))))
				 (if (> curr-tval last-tval)
				     (vg:add-obj-to-comp
				      cmp 
				      (vg:make-rect-obj last-tval lly curr-tval last-yval ;; (- stval 2) lly (+ stval 2)(+ lly (* yval yscale))
							fill-color: stdcolor
							line-color: stdcolor))
				     (print "ERROR: curr-tval is not > last-tval; curr-tval " curr-tval ", last-tval " last-tval))))
			   next)
			 ;; for init create vector tstart,0
			 #f ;; (vector tstart minval minval)
			 dat)
			;; (for-each
			;;  (lambda (dpt)
			;;    (let* ((tval  (vector-ref dpt 0))
			;; 	  (yval  (vector-ref dpt 2))
			;; 	  (stval (tfn tval))
			;; 	  (syval (yfunc yval)))
			;;      (vg:add-obj-to-comp
			;;       cmp 
			;;       (vg:make-rect-obj (- stval 2) lly (+ stval 2)(+ lly (* yval yscale))
			;; 			fill-color: stdcolor))))
			;;  dat)
			)))) ;; for each data point in the series
	      (hash-table-keys alldat)))))
     cfg)))
	 

;; run times tab
;;
(define (dashboard:run-times-tab-layout-updater commondat tabdat tab-num)

		      (sec     (random 60))
		      (count   0))
	     (if (> sec lastsec)
		 (exec (sql db "INSERT INTO alldat (event_time,var,val) VALUES (?,?,?)")
		       (+ thetime sec) ;; (* sec 60))
		       "stuff" 
		       (if (even? thehour)
			   (random 1000)
			   (random 6))))
	     (if (< count 20)
		 (loop (max sec lastsec)(random 60)(+ count 1))))))))

(close-database db)