import time import os import sys import datetime import platform import subprocess from print_label_pdf import PDFLabelGenerator # Cross-platform printer support try: import cups CUPS_AVAILABLE = True except ImportError: CUPS_AVAILABLE = False try: import win32api import win32print WIN32_AVAILABLE = True except ImportError: WIN32_AVAILABLE = False SYSTEM = platform.system() # 'Linux', 'Windows', 'Darwin' def get_available_printers(): """ Get list of available printers (cross-platform). Includes both local and network printers on Windows. Returns: list: List of available printer names, with "PDF" as fallback """ try: if SYSTEM == "Linux" and CUPS_AVAILABLE: # Linux: Use CUPS conn = cups.Connection() printers = conn.getPrinters() return list(printers.keys()) if printers else ["PDF"] elif SYSTEM == "Windows": # Windows: Get local + connected printers (includes print server connections) try: printers = [] # PRINTER_ENUM_LOCAL | PRINTER_ENUM_CONNECTIONS captures: # - Locally installed printers # - Printers connected from a print server (e.g. \\server\printer) try: flags = win32print.PRINTER_ENUM_LOCAL | win32print.PRINTER_ENUM_CONNECTIONS for printer_info in win32print.EnumPrinters(flags): printer_name = printer_info[2] if printer_name and printer_name not in printers: printers.append(printer_name) except Exception as e: print(f"Error enumerating printers: {e}") # Add PDF as fallback option if "PDF" not in printers: printers.append("PDF") return printers if printers else ["PDF"] except Exception as e: print(f"Error getting Windows printers: {e}") return ["PDF"] elif SYSTEM == "Darwin": # macOS: Use lpstat command try: result = subprocess.run(["lpstat", "-p", "-d"], capture_output=True, text=True) printers = [] for line in result.stdout.split('\n'): if line.startswith('printer'): printer_name = line.split()[1] printers.append(printer_name) return printers if printers else ["PDF"] except: return ["PDF"] else: return ["PDF"] except Exception as e: print(f"Error getting printers: {e}") return ["PDF"] def create_label_pdf(text, svg_template=None): """ Create a high-quality PDF label with 3 rows: label + barcode for each field. PDFs are saved to the pdf_backup folder. Args: text (str): Combined text in format "article;nr_art;serial;status" or single value status: 1 = OK label, 0 = NOK label svg_template (str): Path to specific SVG template to use (optional) Returns: str: Path to the generated PDF file """ # Parse the text input - using semicolon separator parts = text.split(';') if ';' in text else [text, '', ''] article = parts[0].strip() if len(parts) > 0 else '' nr_art = parts[1].strip() if len(parts) > 1 else '' serial = parts[2].strip() if len(parts) > 2 else '' status_flag = parts[3].strip() if len(parts) > 3 else '1' # Create PDF using high-quality generator generator = PDFLabelGenerator() # Ensure pdf_backup folder exists pdf_backup_dir = 'pdf_backup' os.makedirs(pdf_backup_dir, exist_ok=True) timestamp = datetime.datetime.now().strftime("%Y%m%d_%H%M%S") pdf_filename = os.path.join(pdf_backup_dir, f"final_label_{timestamp}.pdf") # Select template/image based on status flag # 1 = OK label, 0 = NOK label selected_template = svg_template if svg_template and os.path.exists(svg_template) else None default_svg = os.path.join('conf', 'label_template.svg') ok_svg = os.path.join('conf', 'label_template_ok.svg') nok_svg = os.path.join('conf', 'label_template_nok.svg') if selected_template: image_path = os.path.join('conf', 'accepted.png') if status_flag != '0' else os.path.join('conf', 'refused.png') elif status_flag == '0': # NOK label: prefer dedicated NOK SVG template, otherwise use refused image in standard layout if os.path.exists(nok_svg): selected_template = nok_svg elif os.path.exists(default_svg): selected_template = default_svg image_path = os.path.join('conf', 'refused.png') else: # OK label (default): prefer dedicated OK SVG template, fallback to default SVG template if os.path.exists(ok_svg): selected_template = ok_svg elif os.path.exists(default_svg): selected_template = default_svg image_path = os.path.join('conf', 'accepted.png') return generator.create_label_pdf(article, nr_art, serial, pdf_filename, image_path, selected_template) def find_ghostscript(): """ Find GhostScript executable. Search order: 1. Bundled inside the PyInstaller .exe (ghostscript/bin/ in _MEIPASS) 2. System-level installation (C:\\Program Files\\gs\\...) Returns the full path to gswin64c.exe / gswin32c.exe, or None. """ # 1 ── Bundled location (PyInstaller one-file build) if getattr(sys, 'frozen', False) and hasattr(sys, '_MEIPASS'): for exe_name in ['gswin64c.exe', 'gswin32c.exe']: bundled = os.path.join(sys._MEIPASS, 'ghostscript', 'bin', exe_name) if os.path.exists(bundled): print(f"Using bundled GhostScript: {bundled}") return bundled # 2 ── System installation (newest version first) for program_files in [r"C:\Program Files", r"C:\Program Files (x86)"]: gs_base = os.path.join(program_files, "gs") if os.path.exists(gs_base): for version_dir in sorted(os.listdir(gs_base), reverse=True): for exe_name in ["gswin64c.exe", "gswin32c.exe"]: gs_path = os.path.join(gs_base, version_dir, "bin", exe_name) if os.path.exists(gs_path): return gs_path return None def print_pdf_with_ghostscript(pdf_path, printer_name): """ Print PDF via GhostScript mswinpr2 device for true vector quality. GhostScript sends native vector data to the printer driver, avoiding the low-DPI rasterisation that causes dotted/pixelated output. Returns True on success, False if GhostScript is unavailable or fails. """ gs_path = find_ghostscript() if not gs_path: print("GhostScript not found – skipping to SumatraPDF fallback.") return False # Build environment: if running as a bundled exe, point GS_LIB at the # extracted lib/ folder so GhostScript can find its .ps init files. env = os.environ.copy() if getattr(sys, 'frozen', False) and hasattr(sys, '_MEIPASS'): bundled_lib = os.path.join(sys._MEIPASS, 'ghostscript', 'lib') if os.path.isdir(bundled_lib): env['GS_LIB'] = bundled_lib print(f"GS_LIB → {bundled_lib}") try: # -sDEVICE=mswinpr2 : native Windows printer device (vector path) # -dNOPAUSE / -dBATCH : batch mode, no user prompts # -r600 : 600 DPI matches typical thermal-printer head # -dTextAlphaBits=4 : anti-aliasing for text # -dGraphicsAlphaBits=4 # -dNOSAFER : allow file access needed for fonts # The printer paper size and orientation are already configured # in the driver – do not override them here. cmd = [ gs_path, "-dNOPAUSE", "-dBATCH", "-sDEVICE=mswinpr2", "-dNOSAFER", "-r600", "-dTextAlphaBits=4", "-dGraphicsAlphaBits=4", f"-sOutputFile=%printer%{printer_name}", pdf_path, ] print(f"Printing with GhostScript (vector quality) to: {printer_name}") result = subprocess.run( cmd, check=True, capture_output=True, text=True, timeout=60, env=env, creationflags=subprocess.CREATE_NO_WINDOW if os.name == "nt" else 0, ) print(f"✅ Label sent via GhostScript: {printer_name}") return True except subprocess.CalledProcessError as e: print(f"GhostScript print failed (exit {e.returncode}): {e.stderr.strip() if e.stderr else ''}") return False except Exception as e: print(f"GhostScript error: {e}") return False def print_to_printer(printer_name, file_path): """ Print file to printer (cross-platform). Uses SumatraPDF for silent printing on Windows. Args: printer_name (str): Name of printer or "PDF" for PDF output file_path (str): Path to file to print Returns: bool: True if successful """ try: if printer_name == "PDF": # PDF output - file is already saved print(f"PDF output: {file_path}") return True elif SYSTEM == "Linux" and CUPS_AVAILABLE: # Linux: Use CUPS conn = cups.Connection() conn.printFile(printer_name, file_path, "Label Print", {}) print(f"Label sent to printer: {printer_name}") return True elif SYSTEM == "Windows": # Windows: Print PDF silently without any viewer opening try: if WIN32_AVAILABLE: import win32print if file_path.endswith('.pdf'): # Try silent printing methods (no viewer opens) import os printed = False # Method 1: GhostScript (best quality – true vector path). # Tried first regardless of whether we are running as a # script or as the packaged .exe, because GhostScript is # a system-level installation and will be present on the # machine independently of how this app is launched. # If GhostScript is not installed it returns False # immediately and we fall through to SumatraPDF. printed = print_pdf_with_ghostscript(file_path, printer_name) if printed: return True # Method 2: SumatraPDF (bundled inside exe or external) sumatra_paths = [] # Get the directory where this script/exe is running if getattr(sys, 'frozen', False): # Running as compiled executable # PyInstaller extracts bundled files to sys._MEIPASS temp folder if hasattr(sys, '_MEIPASS'): # Check bundled version first (inside the exe) bundled_sumatra = os.path.join(sys._MEIPASS, 'SumatraPDF.exe') sumatra_paths.append(bundled_sumatra) # 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__)) 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")) # Then check system installations sumatra_paths.extend([ r"C:\Program Files\SumatraPDF\SumatraPDF.exe", r"C:\Program Files (x86)\SumatraPDF\SumatraPDF.exe", ]) for sumatra_path in sumatra_paths: if os.path.exists(sumatra_path): try: print(f"Using SumatraPDF: {sumatra_path}") print(f"Sending to printer: {printer_name}") # "noscale" = print the PDF at its exact page size. # Do NOT add "landscape" – the printer driver # already knows the orientation from its own settings. result = subprocess.run([ sumatra_path, "-print-to", printer_name, file_path, "-print-settings", "noscale", "-silent", "-exit-when-done" ], 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}") # Do not launch default PDF viewers (Adobe/Edge/etc.) as fallback. if not printed: print("SumatraPDF not found or failed. PDF saved as backup only (no viewer launched).") return False return True else: # Non-PDF files subprocess.run(['notepad', '/p', file_path], check=False, creationflags=subprocess.CREATE_NO_WINDOW) print(f"Label sent to printer: {printer_name}") return True except Exception as e: print(f"Windows print error: {e}") print("PDF backup saved as fallback") return True elif SYSTEM == "Darwin": # macOS: Use lp command subprocess.run(["lp", "-d", printer_name, file_path], check=True) print(f"Label sent to printer: {printer_name}") return True else: print(f"Unsupported system: {SYSTEM}") return False except Exception as e: print(f"Printer error: {str(e)}") print("Label already saved to file as fallback...") print(f"Label file: {file_path}") return True def print_label_standalone(value, printer, preview=0, svg_template=None): """ Generate a PDF label, save it to pdf_backup/, and print it on the printer. The printer's own paper size and orientation settings are used as-is. Args: value (str): Label data in format "article;nr_art;serial;status" printer (str): Printer name (or "PDF" to skip physical printing) preview (int): 0 = print immediately; 1-3 = 3 s delay; >3 = 5 s delay svg_template (str): Path to SVG template (optional; auto-selected if None) Returns: bool: True if sending to printer succeeded, False otherwise """ pdf_file = None try: # Step 1 – Generate and save PDF to pdf_backup/ try: pdf_file = create_label_pdf(value, svg_template) if pdf_file and os.path.exists(pdf_file): print(f"PDF label created: {pdf_file}") else: print("PDF generation failed – no output file") return False except Exception as pdf_err: print(f"PDF generation error: {pdf_err}") return False # Step 2 – Optional countdown before printing if isinstance(preview, str): preview = int(preview) if preview > 0: preview_sec = 3 if 1 <= preview <= 3 else 5 print(f"Printing in {preview_sec} seconds… (Ctrl+C to cancel)") try: for i in range(preview_sec, 0, -1): print(f" {i}...", end=" ", flush=True) time.sleep(1) print("\nPrinting now...") except KeyboardInterrupt: print("\nCancelled by user") return False # Step 3 – Send to printer print("Sending to printer...") return print_to_printer(printer, pdf_file) except Exception as e: print(f"Error printing label: {str(e)}") return False finally: if pdf_file and os.path.exists(pdf_file): print("Cleanup complete – PDF backup saved to pdf_backup/") else: print("Cleanup complete") # Main code removed - import this module or run as part of the Kivy GUI application