WIP

main.go

@@ -12,9 +12,9 @@ import (
 // 1
 
 var cols = 4
-var rows = 7
-var qrSize = 35
-var offset = qrSize/2 + 5
+var rows = 5
+var qrSize = 40
+var fontSize = 20
 
 func main() {
 	qrc, err := qrcode.New("https://nanocat.net")
@@ -25,6 +25,8 @@ func main() {
 
 	b := newBWC()
 	qrBytes := standard.NewWithWriter(&b,
+		// standard.WithQRWidth(uint8(qrSize)),
+		standard.WithBorderWidth(0),
 		standard.WithBuiltinImageEncoder(standard.PNG_FORMAT),
 		standard.WithCircleShape(),
 		standard.WithFgGradient(&standard.LinearGradient{
@@ -53,8 +55,10 @@ func main() {
 	if err = qrc.Save(qrBytes); err != nil {
 		fmt.Printf("could not save image: %v", err)
 	}
+	// dim := qrc.Dimension()
 
 	pdf := fpdf.New("P", "mm", "A4", "")
+	pdf.SetMargins(0, 0, 0)
 	pageWidth, pageHeight := pdf.GetPageSize()
 
 	// register the qr
@@ -64,8 +68,11 @@ func main() {
 		AllowNegativePosition: false,
 	}, b)
 
+	info := pdf.GetImageInfo("qr")
+	// panic(info.Height())
+
 	pdf.AddPage()
-	pdf.SetFont("Arial", "B", 16)
+	pdf.SetFont("Arial", "B", float64(fontSize))
 
 	text := "foobar"
 	textWidth := pdf.GetStringWidth(text)
@@ -73,16 +80,39 @@ func main() {
 	colWidth := pageWidth / float64(cols)
 	rowHeight := pageHeight / float64(rows)
 
-	for i := 0; i < rows; i++ {
-		for j := 0; j < cols; j++ {
-			pdf.Text(colWidth*float64(j)+colWidth/2-textWidth/2,
-				rowHeight*float64(i)+rowHeight/2-float64(offset),
-				text)
+	for rowIdx := range rows {
+		for colIdx := range cols {
+			topLeftX := colWidth * float64(colIdx)
+			topLeftY := rowHeight * float64(rowIdx)
 
-			pdf.Image("qr",
-				colWidth*float64(j)+colWidth/2-float64(qrSize)/2, rowHeight*float64(i)+rowHeight/2+float64(offset),
+			// if rowHeight*0.8 < float64(qrSize) {
+			// 	panic("row too small for qr")
+			// }
+			// if colWidth*0.6 < float64(qrSize) {
+			// 	panic("col too small for qr")
+			// }
+
+			// label at the top
+			pdf.Text(
+				topLeftX+colWidth/2-textWidth/2,
+				topLeftY+float64(fontSize),
+				text, // +fmt.Sprintf("%d/%d", rowIdx, colIdx)
+			)
+
+			info.Height()
+			// pdf at the bottom
+			pdf.ImageOptions("qr",
+				topLeftX+info.Width()-float64(qrSize), //+float64(dim)/2,        // centre
+				topLeftY+float64(fontSize)*1.3,        // centre
 				float64(qrSize), float64(qrSize),
-				false, "tp", 0, "")
+				false,
+				fpdf.ImageOptions{AllowNegativePosition: true}, 0, "")
+			// pdf.Image("qr",
+			// 	topLeftX+5,                     // centre
+			// 	topLeftY+float64(fontSize)*1.3, // centre
+			// 	float64(qrSize),
+			// 	float64(qrSize),
+			// 	false, "tp", 0, "")
 
 		}
 	}