ske087/adaptronic_label-printer
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Fix printing: landscape orientation + high quality DPI via win32print before SumatraPDF job

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adaptronic-label printer final
2026-02-20 17:03:20 +02:00
parent 63b46206b6
commit 3f3da62543
12 changed files with 230 additions and 34 deletions
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47
print_label.py
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@@ -394,10 +394,12 @@ def print_to_printer(printer_name, file_path):
bundled_sumatra = os.path.join(sys._MEIPASS, 'SumatraPDF.exe')
sumatra_paths.append(bundled_sumatra)
# Also check app directory for external version
# Check app directory and conf subfolder for external version
app_dir = os.path.dirname(sys.executable)
sumatra_paths.append(os.path.join(app_dir, "SumatraPDF", "SumatraPDF.exe"))
sumatra_paths.append(os.path.join(app_dir, "SumatraPDF.exe"))
sumatra_paths.append(os.path.join(app_dir, "conf", "SumatraPDF.exe")) # conf subfolder next to exe
sumatra_paths.append(os.path.join(os.getcwd(), "conf", "SumatraPDF.exe")) # conf relative to cwd
else:
# Running as script - check local folders
app_dir = os.path.dirname(os.path.abspath(__file__))
@@ -411,26 +413,49 @@ def print_to_printer(printer_name, file_path):
r"C:\Program Files (x86)\SumatraPDF\SumatraPDF.exe",
])
# Set printer to highest quality / landscape before sending job
if WIN32_AVAILABLE:
try:
import win32print
hPrinter = win32print.OpenPrinter(printer_name)
try:
props = win32print.GetPrinter(hPrinter, 2)
dm = props['pDevMode']
if dm:
dm.Orientation = 2 # DMORIENT_LANDSCAPE
dm.PrintQuality = -4 # DMRES_HIGH (highest DPI)
dm.YResolution = -4 # also set Y res
win32print.SetPrinter(hPrinter, 2, props, 0)
print("Printer set to landscape + high quality")
finally:
win32print.ClosePrinter(hPrinter)
except Exception as qe:
print(f"Could not configure printer quality/orientation: {qe}")
for sumatra_path in sumatra_paths:
if os.path.exists(sumatra_path):
try:
# Use noscale with paper size specification for thermal printers
# Format: "noscale,paper=<size>" where paper size matches PDF (35mm x 25mm)
# SumatraPDF will use the PDF's page size when noscale is used
subprocess.run([
print(f"Using SumatraPDF: {sumatra_path}")
print(f"Sending to printer: {printer_name}")
result = subprocess.run([
sumatra_path,
"-print-to",
printer_name,
file_path,
"-print-settings",
"noscale", # Preserve exact PDF page dimensions
"noscale,landscape", # preserve dimensions + force landscape
"-silent",
"-exit-when-done"
], check=False, creationflags=subprocess.CREATE_NO_WINDOW)
print(f"Label sent to printer via SumatraPDF: {printer_name}")
print(f"Note: Printer '{printer_name}' should be configured for 35mm x 25mm labels")
printed = True
break
], check=False, creationflags=subprocess.CREATE_NO_WINDOW,
capture_output=True, text=True, timeout=30)
if result.returncode != 0:
print(f"SumatraPDF returned code {result.returncode}")
if result.stderr:
print(f"SumatraPDF stderr: {result.stderr.strip()}")
else:
print(f"Label sent to printer via SumatraPDF: {printer_name}")
printed = True
break
except Exception as e:
print(f"SumatraPDF error: {e}")