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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 diff --git a/src/templates/frontend.tpl b/src/templates/frontend.tpl index aaf8ed8..07cdb28 100644 --- a/src/templates/frontend.tpl +++ b/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; }}