pg.go

package main

import (
	"fmt"
	"github.com/ajstarks/pdfgen"
	"os"
)

func blist(p *pdfgen.PDFDoc, x, y, size, ls float64, list []string, color string) {
	qsize := size/4
	for _, s := range list {
		p.Circle(x+qsize, y, qsize, color)
		p.Text(x+size, y-qsize, s, "sans", size, color)
		y -= size * ls
	}	
}

func nlist(p *pdfgen.PDFDoc, x, y, size, ls float64, list []string, color string) {
	for i, s := range list {
		p.Text(x, y, fmt.Sprintf("%d.  %s", i+1, s), "sans", size, color)
		y -= size * ls
	}	
}

func list(p *pdfgen.PDFDoc, x, y, size, ls float64, list []string, color string) {
	for _, s := range list {
		p.Text(x, y, s, "sans", size, color)
		y -= size * ls
	}	
}

func grid(p *pdfgen.PDFDoc, width, height, interval float64, color string) {
	bottom := interval
	left := interval
	for x := left; x < width; x += interval {
		p.Line(x, 0, x, height, 0.5, color)
		p.Text(x, bottom, fmt.Sprintf("%v", x), "sans", 8, "gray")
	}
	
	for y := bottom; y < height; y += interval {
		p.Line(0, y, width, y, 0.5, color)
		p.Text(left, y, fmt.Sprintf("%v", y), "sans", 8, "gray")
	}
}

func main() {
	width, height, linewidth := 11.0 * 72, 8.5 * 72, 2.0
	items := []string{"text, image, list",  "rect, ellipse, polygon", "line, arc, curve"}
	p := pdfgen.NewDoc(os.Stdout, width, height)
	p.Init(1)
	p.NewPage(1)
	p.Text(100, 512, "Deck Elements", "sans", 48, "black")
	p.Image(400, 200, 640, 480, 50, "follow.jpg")
	p.Text(400, 175, "Follow your dreams", "sans", 12, "gray")
	blist(p, 100, 425, 24, 1.6, items, "black")
	p.Rect(100, 85, 50, 30, "maroon")
	p.Ellipse(225, 100, 25, 15, "green")
	p.Polygon([]float64{300, 350, 300}, []float64{80, 100, 120}, "rgb(0,0,127)")
	p.Line(400, 100, 450, 100, linewidth, "black")
	p.Arc(525, 100, 25, 25, 0, 180, linewidth, "blue")
	p.Curve(600, 100, 750, 180, 700, 100, linewidth, "black")
	p.EndPage()
	p.EndDoc()
}