WIP

.vscode/settings.json

@@ -4,5 +4,8 @@
         "fpdf",
         "qrcode",
         "yeqown"
+    ],
+    "cSpell.ignoreWords": [
+        "Hjqy"
     ]
 }

main.go

@@ -11,13 +11,16 @@ import (
 
 var cols = 4
 var rows = 4
-var qrSize = 50.0
-var fontSize = 32.0 // pts
+var qrSize = 48.0
+var fontSize = 25.0 // pts
 var fontSizeMM = fontSize / 72 * 25.4
-var text = "meow!"
+var text = "Á[Hjqy]|"
+var font = "Courier"
 
-var textTopPadding = 5.0
-var qrTopPadding = 5.0
+var textTopPadding = 0.0 // typically none is required
+var qrTopPadding = 5.0   // below the baseline of the text, remember the descenders like 'y', 'q'
+
+var requiredCellPadding = 3.0 // half on each side, effectively
 
 // var probably some padding instead of offsets for qr/font placement
 
@@ -79,19 +82,25 @@ func main() {
 	// panic(info.Height())
 
 	pdf.AddPage()
-	pdf.SetFont("Arial", "B", float64(fontSize))
+	pdf.SetFont(font, "B", float64(fontSize))
 
 	textWidth := pdf.GetStringWidth(text)
 
 	colWidth := pageWidth / float64(cols)
 	rowHeight := pageHeight / float64(rows)
 
-	if textTopPadding+fontSizeMM+qrTopPadding+qrSize > rowHeight {
-		slog.Warn("qr is too big for row")
+	cellHeight := textTopPadding + fontSizeMM + qrTopPadding + qrSize
+	cellWidth := qrSize
+
+	if cellHeight > rowHeight-requiredCellPadding {
+
+		slog.Warn("qr is too big for row", "cell_height", cellHeight, "row_height", rowHeight)
 	}
 
-	if qrSize > colWidth {
-		slog.Warn("qr is too big for column")
+	slog.Info("check width", "cell_width", cellWidth, "col_width", colWidth)
+
+	if cellWidth > colWidth-requiredCellPadding {
+		slog.Warn("qr is too big for column", "cell_width", cellWidth, "col_width", colWidth)
 	}
 
 	if textWidth > colWidth {
@@ -103,10 +112,15 @@ func main() {
 			topLeftX := colWidth * float64(colIdx)
 			topLeftY := rowHeight * float64(rowIdx)
 
+			// draw box
+			pdf.SetDashPattern([]float64{1, 1}, 0)
+			pdf.Rect(topLeftX, topLeftY, colWidth, rowHeight, "D")
+			pdf.SetDashPattern([]float64{}, 0)
+
 			// label at the top
 			pdf.Text(
 				topLeftX+colWidth/2-textWidth/2,
-				topLeftY+textTopPadding+fontSizeMM,
+				topLeftY+fontSizeMM+textTopPadding,
 				text, // +fmt.Sprintf("%d/%d", rowIdx, colIdx)
 			)