Add QRCode plugin

src/label_plugins/qr code/LICENSE.fonts.txt

@@ -0,0 +1,202 @@
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src/label_plugins/qr code/__init__.py

@@ -0,0 +1,132 @@
+"""
+### QR Code Plugin
+
+Fonts distributed with this plugin:
+
+* Roboto (License: Apache 2.0)
+"""
+
+import os
+from PIL import Image, ImageDraw, ImageFont
+import qrcode
+
+# What's required from a plugin:
+# BROTHER_QL_LABEL, ARGUMENTS, create_label()
+
+BROTHER_QL_LABEL = "62"
+
+ARGUMENTS = {
+  'data': {'help': 'Data to Encode', 'type': str, 'default': 'This is a QR Code'},
+  'label': {'help': 'Text Label', 'type': str, 'default': ''},
+}
+
+FONT_REGULAR = "Roboto-Regular.ttf"
+FONT_MEDIUM  = "Roboto-Medium.ttf"
+
+LABEL_SIZE = (696, 696)
+
+BROTHER_QL_CONVERT_KWARGS = {
+  'rotate': '0',
+}
+
+def resource_path(rel_path):
+    return os.path.join(os.path.dirname(__file__), rel_path)
+
+def create_label(data="", label=""):
+    print("Setting up image")
+    if not data:
+        data = ARGUMENTS['data']['default']
+    if not label:
+        label = ARGUMENTS['label']['default']
+
+    qr = qrcode.QRCode(
+        version=None,
+        error_correction=qrcode.constants.ERROR_CORRECT_M,
+        box_size=10,
+        border=2,
+    )
+    qr.add_data(data)
+    qr.make(fit=True)
+    qr_img = qr.make_image(fill_color="black", back_color="white").convert("RGB")
+
+    target_width = LABEL_SIZE[0] - 10
+    scale = target_width / qr_img.width
+    target_height = int(qr_img.height * scale)
+    qr_img = qr_img.resize((target_width, target_height), Image.LANCZOS)
+
+    # Set a default vertical margin
+    top_margin = 10
+    between_qr_text = 10
+
+    if label:
+        font_path = resource_path(FONT_MEDIUM)
+        font = fit_text(label, target_width, font_path, initial_font_size=100)
+
+        bottom_padding = 25
+
+        # Measure text
+        text_bbox = font.getbbox(label)
+        text_width = text_bbox[2] - text_bbox[0]
+        text_height = text_bbox[3] - text_bbox[1]
+
+        # Dynamically calculate total label height
+        total_height = target_height + top_margin + between_qr_text + text_height + bottom_padding
+        combined = Image.new("RGB", (LABEL_SIZE[0], total_height), "white")
+
+        # Paste QR code
+        qr_x = (LABEL_SIZE[0] - target_width) // 2
+        combined.paste(qr_img, (qr_x, top_margin))
+
+        # Draw text centered
+        draw = ImageDraw.Draw(combined)
+        x = (LABEL_SIZE[0] - text_width) // 2
+        y = target_height + top_margin + between_qr_text
+        draw.text((x, y), label, fill="black", font=font)
+
+    else:
+        # No label — just square QR code
+        combined = Image.new("RGB", LABEL_SIZE, "white")
+        qr_x = (LABEL_SIZE[0] - target_width) // 2
+        qr_y = (LABEL_SIZE[1] - target_height) // 2
+        combined.paste(qr_img, (qr_x, qr_y))
+
+    return combined
+
+
+def break_text_whitespace(txt, font, max_width):
+    """
+    break text at whitespace
+    https://stackoverflow.com/a/43830313/183995
+    """
+
+    line = ""
+    width_of_line = 0
+    # break string into multi-lines that fit max_width
+    for token in txt.split():
+        token = token + ' '
+        token_width = font.getbbox(token)[2]  # <-- use getbbox()[2] instead of getsize()[0]
+        if width_of_line + token_width < max_width:
+            line += token
+            width_of_line += token_width
+        else:
+            yield line
+            line = token
+            width_of_line = token_width
+    if line:
+        yield line
+
+
+def fit_text(txt, max_width, font_path, initial_font_size, max_lines=1, delta=-1, break_func=break_text_whitespace):
+    """
+    Tries to fit the given text in the given
+    max_width with the given max_lines.
+    Adjusts the font size until it fits.
+    Returns the font with the adjusted size.
+    """
+    font_size = initial_font_size
+    font = ImageFont.truetype(font_path, font_size)
+    while len(list(break_func(txt, font, max_width))) > max_lines:
+        font_size += delta
+        if font_size == 5: return font
+        font = ImageFont.truetype(font_path, font_size)
+    return font

src/templates/frontend.tpl

@@ -9,9 +9,11 @@
             body { font-family: sans-serif; padding: 1em; max-width: 600px; margin: auto;}
             label { display: block; margin-top: 0.5em}
             input, select { width: 100%; padding: 0.5em; margin-top: 0.2em; box-sizing: border-box;}
+            @media screen and (max-width: 600px) { input, select { height: 50px; padding: 0.75em; }}
             #preview-container { display: inline-flex; justify-content: center; align-items: center; width: 100%; max-height: 50vh; }
             #preview { max-width: 100%; max-height: 50vh; display: block; border: 1px dashed black}
             button {padding: 0.5em 1em; margin-top: 1em; width: 100%;}
+            @media screen and (max-width: 600px) { button { height: 50px; padding: 0.75em; }}
         </style>
     </head>
     <body>