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Improve ticket legibility: larger fonts, spacing, indentation and thermal emphasized mode
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consultoria-as
2026-07-18 16:22:26 +00:00
parent 8e6c1f2887
commit 95a01c8958
3 changed files with 31 additions and 15 deletions
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16
pos/services/thermal_printer.py
View File

@@ -16,9 +16,13 @@ ALIGN_CENTER = ESC + b'a' + b'\x01'
ALIGN_RIGHT = ESC + b'a' + b'\x02' ALIGN_RIGHT = ESC + b'a' + b'\x02'
BOLD_ON = ESC + b'E' + b'\x01' BOLD_ON = ESC + b'E' + b'\x01'
BOLD_OFF = ESC + b'E' + b'\x00' BOLD_OFF = ESC + b'E' + b'\x00'
EMPH_ON = ESC + b'G' + b'\x01' # Double-strike / emphasized
EMPH_OFF = ESC + b'G' + b'\x00'
DOUBLE_HEIGHT = ESC + b'!' + b'\x10' DOUBLE_HEIGHT = ESC + b'!' + b'\x10'
NORMAL_SIZE = ESC + b'!' + b'\x00' NORMAL_SIZE = ESC + b'!' + b'\x00'
LARGE_SIZE = ESC + b'!' + b'\x30' # Double width + double height LARGE_SIZE = ESC + b'!' + b'\x30' # Double width + double height
LINE_SPACING_140 = ESC + b'3' + b'\x28' # ~1.4x line spacing
LINE_SPACING_DEFAULT = ESC + b'2'
def generate_ticket(sale_data, business_info, width=80): def generate_ticket(sale_data, business_info, width=80):
@@ -34,6 +38,8 @@ def generate_ticket(sale_data, business_info, width=80):
chars = 32 if width == 58 else 48 # characters per line chars = 32 if width == 58 else 48 # characters per line
buf = bytearray() buf = bytearray()
buf += INIT buf += INIT
buf += EMPH_ON
buf += LINE_SPACING_140
# Header: business name (centered, bold, large) # Header: business name (centered, bold, large)
buf += ALIGN_CENTER buf += ALIGN_CENTER
@@ -100,6 +106,8 @@ def generate_ticket(sale_data, business_info, width=80):
buf += 'Gracias por su compra!\n'.encode('cp437', errors='replace') buf += 'Gracias por su compra!\n'.encode('cp437', errors='replace')
buf += 'Nexus Autoparts POS\n'.encode('cp437', errors='replace') buf += 'Nexus Autoparts POS\n'.encode('cp437', errors='replace')
buf += b'\n\n\n' buf += b'\n\n\n'
buf += LINE_SPACING_DEFAULT
buf += EMPH_OFF
buf += FEED + b'\x05' # Feed 5 lines before cutting buf += FEED + b'\x05' # Feed 5 lines before cutting
buf += CUT # Full cut buf += CUT # Full cut
@@ -120,6 +128,8 @@ def generate_quotation_ticket(quote_data, business_info, width=80):
chars = 32 if width == 58 else 48 chars = 32 if width == 58 else 48
buf = bytearray() buf = bytearray()
buf += INIT buf += INIT
buf += EMPH_ON
buf += LINE_SPACING_140
# Header # Header
buf += ALIGN_CENTER buf += ALIGN_CENTER
@@ -188,6 +198,8 @@ def generate_quotation_ticket(quote_data, business_info, width=80):
buf += 'Precios sujetos a disponibilidad\n'.encode('cp437', errors='replace') buf += 'Precios sujetos a disponibilidad\n'.encode('cp437', errors='replace')
buf += 'Nexus Autoparts POS\n'.encode('cp437', errors='replace') buf += 'Nexus Autoparts POS\n'.encode('cp437', errors='replace')
buf += b'\n\n\n' buf += b'\n\n\n'
buf += LINE_SPACING_DEFAULT
buf += EMPH_OFF
buf += FEED + b'\x05' buf += FEED + b'\x05'
buf += CUT buf += CUT
@@ -226,6 +238,8 @@ def generate_service_order_ticket(so_data, business_info, width=80):
chars = 32 if width == 58 else 48 chars = 32 if width == 58 else 48
buf = bytearray() buf = bytearray()
buf += INIT buf += INIT
buf += EMPH_ON
buf += LINE_SPACING_140
# Header # Header
buf += ALIGN_CENTER buf += ALIGN_CENTER
@@ -340,6 +354,8 @@ def generate_service_order_ticket(so_data, business_info, width=80):
buf += "No es comprobante fiscal\n".encode("cp437", errors="replace") buf += "No es comprobante fiscal\n".encode("cp437", errors="replace")
buf += "Nexus Autoparts POS\n".encode("cp437", errors="replace") buf += "Nexus Autoparts POS\n".encode("cp437", errors="replace")
buf += b"\n\n\n" buf += b"\n\n\n"
buf += LINE_SPACING_DEFAULT
buf += EMPH_OFF
buf += FEED + b'\x05' buf += FEED + b'\x05'
buf += CUT buf += CUT

28
pos/static/js/pos.js
View File

@@ -1666,9 +1666,9 @@ const POS = (() => {
const paperWidth = parseInt(rc('paper_width', '80'), 10) || 80; const paperWidth = parseInt(rc('paper_width', '80'), 10) || 80;
const is58 = paperWidth === 58; const is58 = paperWidth === 58;
const printWidth = is58 ? 48 : 72; const printWidth = is58 ? 48 : 72;
const fontSize = is58 ? '7.5pt' : '9pt'; const fontSize = is58 ? '9.5pt' : '11pt';
const smallFont = is58 ? '6.5pt' : '8pt'; const smallFont = is58 ? '8pt' : '9.5pt';
const nameMax = is58 ? '18mm' : '34mm'; const nameMax = is58 ? '17mm' : '32mm';
let iframe = document.getElementById('ticketPrintFrame'); let iframe = document.getElementById('ticketPrintFrame');
if (!iframe) { if (!iframe) {
@@ -1691,22 +1691,22 @@ const POS = (() => {
<style> <style>
@page { margin: 0; size: ${printWidth}mm auto; } @page { margin: 0; size: ${printWidth}mm auto; }
* { box-sizing: border-box; } * { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: auto; overflow: visible; background: #fff; color: #000; font-family: 'Courier New', Consolas, monospace; font-size: ${fontSize}; line-height: 1.25; } html, body { margin: 0; padding: 0; height: auto; overflow: visible; background: #fff; color: #000; font-family: 'Courier New', Courier, 'Lucida Console', monospace; font-size: ${fontSize}; line-height: 1.55; -webkit-font-smoothing: none; -moz-osx-font-smoothing: unset; text-rendering: geometricPrecision; }
body { width: ${printWidth}mm; } body { width: ${printWidth}mm; }
.ticket { width: ${printWidth}mm; padding: 2mm; border: none !important; box-shadow: none !important; } .ticket { width: ${printWidth}mm; padding: 4mm 3mm 5mm; border: none !important; box-shadow: none !important; }
.item-line-wide { display: grid !important; grid-template-columns: 7mm 1fr auto auto !important; gap: 1.5mm; font-size: ${smallFont}; margin-bottom: 1mm; align-items: start; } .item-line-wide { display: grid !important; grid-template-columns: 8mm 1fr auto auto !important; gap: 2mm; font-size: ${fontSize}; margin-bottom: 2mm; padding-left: 1mm; align-items: start; }
.item-line-wide .qty { text-align: center; } .item-line-wide .qty { text-align: center; }
.item-line-wide .name { white-space: normal !important; word-break: break-word; overflow-wrap: anywhere; max-width: ${nameMax}; } .item-line-wide .name { white-space: normal !important; word-break: break-word; overflow-wrap: anywhere; max-width: ${nameMax}; padding-left: 1mm; }
.item-line-wide .price, .item-line-wide .subtotal { text-align: right; white-space: nowrap; } .item-line-wide .price, .item-line-wide .subtotal { text-align: right; white-space: nowrap; }
.ticket-row, .folio-line, .total-line { display: flex !important; justify-content: space-between; gap: 2mm; } .ticket-row, .folio-line, .total-line { display: flex !important; justify-content: space-between; gap: 2mm; }
.total-line.grand { font-size: ${is58 ? '9pt' : '11pt'}; font-weight: bold; border-top: 0.5mm solid #000; padding-top: 1mm; margin-top: 1mm; } .total-line.grand { font-size: ${is58 ? '11pt' : '13pt'}; font-weight: bold; border-top: 0.6mm solid #000; padding-top: 1.5mm; margin-top: 1.5mm; }
.store-name { font-size: ${is58 ? '10pt' : '12pt'}; font-weight: bold; text-align: center; margin-bottom: 2px; } .store-name { font-size: ${is58 ? '12pt' : '14pt'}; font-weight: bold; text-align: center; margin-bottom: 3px; }
.store-tagline, .store-info { font-size: ${smallFont}; text-align: center; color: #333; margin-bottom: 4px; line-height: 1.3; } .store-tagline, .store-info { font-size: ${smallFont}; text-align: center; color: #000; margin-bottom: 5px; line-height: 1.45; }
.divider { border: none; border-top: 1px dashed #999; margin: 3px 0; } .divider { border: none; border-top: 1px dashed #999; margin: 5px 0; }
.divider-double { border: none; border-top: 2px solid #333; margin: 3px 0; } .divider-double { border: none; border-top: 2px solid #333; margin: 5px 0; }
.footer-section { text-align: center; margin-top: 6px; font-size: ${smallFont}; color: #555; } .footer-section { text-align: center; margin-top: 8px; font-size: ${smallFont}; color: #000; line-height: 1.45; }
.payment-section, .total-section { width: 100%; } .payment-section, .total-section { width: 100%; }
img { max-width: 100%; height: auto; } img { max-width: 100%; height: auto; image-rendering: pixelated; }
</style> </style>
</head> </head>
<body>${src.innerHTML}</body> <body>${src.innerHTML}</body>

2
pos/static/pwa/sw.js
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@@ -6,7 +6,7 @@
// The fetch handler normalizes static asset URLs (strips ?v= query strings) // The fetch handler normalizes static asset URLs (strips ?v= query strings)
// so templates can use cache-busting query params freely. // so templates can use cache-busting query params freely.
const VERSION = 47; const VERSION = 48;
const CACHE_NAME = 'nexus-pos-v' + VERSION; const CACHE_NAME = 'nexus-pos-v' + VERSION;
const APP_SHELL = [ const APP_SHELL = [