update README, add svgrid, svgplot definition script

README.markdown

@@ -116,6 +116,7 @@ A video describing how to use the package can be seen on YouTube at <http://www.
 * stockproduct:	Visualize product and stock prices
 * svgopher:	SVGo Mascot
 * svgplot		Plot data
+* svgrid	Compose SVG files in a grid
 * tsg:  Twitter Search Grid
 * vismem:	Visualize data from files
 * webfonts:	"Hello, World" with Google Web Fonts

svgplot/mksvgplotdef

@@ -0,0 +1,24 @@
+#!/bin/sh
+rm f??*.svg
+gopts="-bx=50 -by=20 -width=460 -height=130 -pw=400 -ph=90 -barsize=3 -fontsize=11"
+data="test.d"
+# opt
+svgplot $gopts -showbg -connect=f    -label=showbg  $data  > f00.svg
+svgplot $gopts -connect              -label=connect $data  > f01.svg
+svgplot $gopts -showbar -connect=f   -label=showbar $data  > f02.svg
+svgplot $gopts -horizon -connect=f   -label=horizon $data  > f03.svg
+svgplot $gopts -showdot -connect=f   -label=showdot $data  > f04.svg
+svgplot $gopts -showx    -label=showx   $data  > f05.svg
+svgplot $gopts -showy    -label=showy   $data  > f06.svg
+svgplot $gopts -showfile -label=showfile  $data  > f07.svg
+# attr
+svgplot $gopts -bgcolor=lightsteelblue   -label=bgcolor   $data > f08.svg
+svgplot $gopts -linecolor=red            -label=linecolor $data > f09.svg
+svgplot $gopts -barcolor=red -showbar -connect=f  -label=barcolor  $data > f10.svg
+svgplot $gopts -hcolor=red  -horizon -connect=f   -label=hcolor  $data > f11.svg
+svgplot $gopts -showdot -dotcolor=red -connect=f  -label=dotcolor  $data > f12.svg
+svgplot $gopts -label=fontsize  $data > f13.svg
+svgplot $gopts -font=Courier -label="font" $data > f14.svg
+svgplot $gopts -label=labelcolor -labelcolor=red $data > f15.svg
+svgrid -h 1200 -w 1024 -r=f -x=50 -y=50 -g 10 -c 8 f??.svg > svgplotdef.svg
+

svgplot/test.d

@@ -0,0 +1,51 @@
+0 493.65
+1 497.57
+2 506.38
+3 521.03
+4 532.44
+5 535.36
+6 546.60
+7 531.99
+8 527.28
+9 534.01
+10 538.26
+11 528.94
+12 597.62
+13 594.94
+14 602.55
+15 595.35
+16 606.99
+17 618.23
+18 618.98
+19 622.52
+20 607.22
+21 610.94
+22 603.69
+23 606.77
+24 592.40
+25 601.17
+26 577.52
+27 579.04
+28 546.02
+29 573.41
+30 549.01
+31 562.13
+32 563.77
+33 557.23
+34 539.00
+35 533.15
+36 504.88
+37 490.92
+38 498.17
+39 518.82
+40 523.29
+41 520.04
+42 526.86
+43 539.08
+44 540.70
+45 540.96
+46 532.50
+47 524.84
+48 522.18
+49 534.03
+50 534.96

svgrid/svgrid.go

@@ -0,0 +1,90 @@
+// svgrid -- composite SVG files in a grid
+package main
+
+import (
+	"encoding/xml"
+	"flag"
+	"fmt"
+	"io"
+	"os"
+
+	"github.com/ajstarks/svgo"
+)
+
+// SVG is a SVG document
+type SVG struct {
+	Width  int    `xml:"width,attr"`
+	Height int    `xml:"height,attr"`
+	Doc    string `xml:",innerxml"`
+}
+
+var (
+	byrow                                          bool
+	startx, starty, count, gutter, gwidth, gheight int
+	canvas                                         = svg.New(os.Stdout)
+)
+
+// init sets up command line options
+func init() {
+	flag.BoolVar(&byrow, "r", true, "order row wise")
+	flag.IntVar(&startx, "x", 0, "begin x")
+	flag.IntVar(&starty, "y", 0, "begin y")
+	flag.IntVar(&count, "c", 3, "columns or rows")
+	flag.IntVar(&gutter, "g", 100, "gutter")
+	flag.IntVar(&gwidth, "w", 1024, "width")
+	flag.IntVar(&gheight, "h", 768, "height")
+	flag.Parse()
+}
+
+// placepic puts a SVG file at a location
+func placepic(x, y int, filename string) (int, int) {
+	var s SVG
+	f, err := os.Open(filename)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "%v\n", err)
+		return 0, 0
+	}
+	defer f.Close()
+	if err := xml.NewDecoder(f).Decode(&s); err != nil {
+		fmt.Fprintf(os.Stderr, "Unable to parse (%v)\n", err)
+		return 0, 0
+	}
+	canvas.Group(`clip-path="url(#pic)"`, fmt.Sprintf(`transform="translate(%d,%d)"`, x, y))
+	canvas.ClipPath(`id="pic"`)
+	canvas.Rect(0, 0, s.Width, s.Height)
+	canvas.ClipEnd()
+	io.WriteString(canvas.Writer, s.Doc)
+	canvas.Gend()
+	return s.Width, s.Height
+}
+
+// compose places files row or column-wise
+func compose(x, y, n int, rflag bool, files []string) {
+	px := x
+	py := y
+	var pw, ph int
+	for i, f := range files {
+		if i > 0 && i%n == 0 {
+			if rflag {
+				px = x
+				py += gutter + ph
+			} else {
+				px += gutter + pw
+				py = y
+			}
+		}
+		pw, ph = placepic(px, py, f)
+		if rflag {
+			px += gutter + pw
+		} else {
+			py += gutter + ph
+		}
+	}
+}
+
+// main lays out files as specified on the command line
+func main() {
+	canvas.Start(gwidth, gheight)
+	compose(startx, starty, count, byrow, flag.Args())
+	canvas.End()
+}