Add Kivy GUI interface for label printer
- Created label_printer_gui.py: Complete Kivy-based GUI application - Two-column layout (input form + live preview) - SAP-Nr, Quantity, Cable ID input fields - Real-time barcode preview (11.5cm x 8cm) - Printer selection dropdown - Print button with CUPS integration - Added setup automation: - setup_and_run.py: Python setup launcher - start_gui.sh: Bash launcher script - validate_project.py: Project validation - Added comprehensive documentation: - INDEX.md: Project overview and quick start - GETTING_STARTED.md: 15-minute quick start guide - README_GUI.md: Complete feature documentation - TECHNICAL_DOCS.md: Architecture and customization - FILE_GUIDE.md: File reference guide - IMPLEMENTATION_SUMMARY.md: Implementation overview - Updated dependencies: - requirements_gui.txt: New Kivy dependencies - Preserved: - print_label.py: Original printing engine (modified to remove main code) - Original documentation and dependencies Features: - Live preview of labels as you type - Automatic CUPS printer detection - Non-blocking background printing - User-friendly error handling - Responsive two-column layout - Production-ready quality
This commit is contained in:
Quality App Developer
526
label_printer_gui.py
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526
label_printer_gui.py
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"""
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Label Printer GUI Application using Kivy
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This application provides a user-friendly interface for printing labels with barcodes.
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"""
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from kivy.app import App
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from kivy.uix.boxlayout import BoxLayout
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from kivy.uix.gridlayout import GridLayout
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from kivy.uix.label import Label
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from kivy.uix.textinput import TextInput
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from kivy.uix.button import Button
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from kivy.uix.spinner import Spinner
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from kivy.uix.scrollview import ScrollView
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from kivy.uix.popup import Popup
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from kivy.core.window import Window
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from kivy.uix.image import Image as KivyImage
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from kivy.uix.widget import Widget
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from kivy.garden.matplotlib.backend_kivyagg import FigureCanvasKivyAgg
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from kivy.graphics import Color, Rectangle
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from kivy.uix.scatterlayout import ScatterLayout
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from PIL import Image as PILImage
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import cups
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import io
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import os
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import threading
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from print_label import create_label_image, print_label_standalone
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# Set window size
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Window.size = (1600, 900)
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class LabelPreviewWidget(ScatterLayout):
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"""Widget for displaying the label preview"""
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def __init__(self, **kwargs):
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super().__init__(**kwargs)
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self.label_image = None
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self.temp_preview_path = None
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def update_preview(self, text):
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"""Update the preview with new label image"""
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if text:
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try:
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self.label_image = create_label_image(text)
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self.display_preview()
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except Exception as e:
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print(f"Error creating preview: {e}")
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def display_preview(self):
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"""Display the preview image"""
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if self.label_image:
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# Save to temporary file
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import tempfile
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if self.temp_preview_path and os.path.exists(self.temp_preview_path):
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try:
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os.remove(self.temp_preview_path)
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except:
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pass
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with tempfile.NamedTemporaryFile(suffix='.png', delete=False) as tmp:
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self.label_image.save(tmp.name)
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self.temp_preview_path = tmp.name
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# Clear and recreate children
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self.clear_widgets()
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# Add image
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img = KivyImage(source=self.temp_preview_path, size_hint=(1, 1))
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self.add_widget(img)
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class LabelPrinterApp(App):
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"""Main Kivy application for label printing"""
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def __init__(self, **kwargs):
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super().__init__(**kwargs)
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self.available_printers = self.get_available_printers()
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self.preview_widget = None
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def get_available_printers(self):
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"""Get list of available printers from CUPS"""
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try:
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conn = cups.Connection()
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printers = conn.getPrinters()
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return list(printers.keys()) if printers else ["PDF"]
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except Exception as e:
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print(f"Error getting printers: {e}")
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return ["PDF"]
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def build(self):
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"""Build the main UI"""
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self.title = "Label Printer Interface"
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# Main layout - horizontal split between input and preview
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main_layout = BoxLayout(orientation='horizontal', spacing=10, padding=10)
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# Left column - Input form
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left_column = self.create_input_column()
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# Right column - Preview
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right_column = self.create_preview_column()
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main_layout.add_widget(left_column)
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main_layout.add_widget(right_column)
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return main_layout
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def create_input_column(self):
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"""Create the left column with input fields"""
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container = BoxLayout(orientation='vertical', size_hint_x=0.4, spacing=10)
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# Title
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title = Label(text='[b]Label Information[/b]', markup=True, size_hint_y=0.08,
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font_size='18sp')
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container.add_widget(title)
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# Scroll view for form
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scroll = ScrollView(size_hint_y=0.85)
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form_layout = GridLayout(cols=1, spacing=10, size_hint_y=None, padding=10)
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form_layout.bind(minimum_height=form_layout.setter('height'))
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# SAP-Nr. Articol
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sap_label = Label(text='SAP-Nr. Articol:', size_hint_y=None, height=40,
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font_size='14sp')
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form_layout.add_widget(sap_label)
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self.sap_input = TextInput(
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multiline=False,
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size_hint_y=None,
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height=50,
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font_size='16sp',
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background_color=(0.95, 0.95, 0.95, 1)
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)
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self.sap_input.bind(text=self.on_input_change)
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form_layout.add_widget(self.sap_input)
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# Cantitate
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qty_label = Label(text='Cantitate:', size_hint_y=None, height=40,
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font_size='14sp')
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form_layout.add_widget(qty_label)
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self.qty_input = TextInput(
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multiline=False,
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size_hint_y=None,
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height=50,
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font_size='16sp',
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input_filter='int',
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background_color=(0.95, 0.95, 0.95, 1)
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)
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self.qty_input.bind(text=self.on_input_change)
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form_layout.add_widget(self.qty_input)
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# ID rola cablu
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cable_id_label = Label(text='ID rola cablu:', size_hint_y=None, height=40,
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font_size='14sp')
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form_layout.add_widget(cable_id_label)
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self.cable_id_input = TextInput(
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multiline=False,
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size_hint_y=None,
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height=50,
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font_size='16sp',
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background_color=(0.95, 0.95, 0.95, 1)
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)
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self.cable_id_input.bind(text=self.on_input_change)
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form_layout.add_widget(self.cable_id_input)
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# Printer selection
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printer_label = Label(text='Select Printer:', size_hint_y=None, height=40,
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font_size='14sp')
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form_layout.add_widget(printer_label)
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printer_spinner = Spinner(
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text=self.available_printers[0] if self.available_printers else "No Printers",
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values=self.available_printers,
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size_hint_y=None,
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height=50,
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font_size='14sp'
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)
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self.printer_spinner = printer_spinner
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form_layout.add_widget(printer_spinner)
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scroll.add_widget(form_layout)
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container.add_widget(scroll)
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# Print button
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print_button = Button(
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text='PRINT LABEL',
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size_hint_y=0.15,
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font_size='16sp',
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background_color=(0.2, 0.6, 0.2, 1),
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background_normal='',
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bold=True
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)
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print_button.bind(on_press=self.print_label)
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container.add_widget(print_button)
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return container
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def create_preview_column(self):
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"""Create the right column with preview"""
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container = BoxLayout(orientation='vertical', size_hint_x=0.6, spacing=10)
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# Title
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title = Label(text='[b]Label Preview (11.5cm x 8cm)[/b]', markup=True,
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size_hint_y=0.08, font_size='18sp')
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container.add_widget(title)
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# Preview canvas
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self.preview_widget = LabelPreviewWidget(size_hint_y=0.92)
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container.add_widget(self.preview_widget)
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return container
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def on_input_change(self, instance, value):
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"""Update preview when input changes"""
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# Get all input values
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sap_nr = self.sap_input.text
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quantity = self.qty_input.text
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cable_id = self.cable_id_input.text
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# Create label text combining all fields
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if sap_nr or quantity or cable_id:
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label_text = f"{sap_nr}|{quantity}|{cable_id}"
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self.preview_widget.update_preview(label_text)
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def print_label(self, instance):
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"""Handle print button press"""
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sap_nr = self.sap_input.text.strip()
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quantity = self.qty_input.text.strip()
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cable_id = self.cable_id_input.text.strip()
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printer = self.printer_spinner.text
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# Validate input
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if not sap_nr and not quantity and not cable_id:
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self.show_popup("Error", "Please enter at least one field")
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return
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# Create combined label text
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label_text = f"{sap_nr}|{quantity}|{cable_id}"
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# Show loading popup
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popup = Popup(
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title='Printing',
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content=BoxLayout(
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orientation='vertical',
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padding=10,
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spacing=10
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),
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size_hint=(0.6, 0.3)
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)
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popup.content.add_widget(Label(text='Printing label...\nPlease wait'))
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popup.open()
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# Print in background thread
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def print_thread():
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try:
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success = print_label_standalone(label_text, printer, preview=0)
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if success:
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popup.dismiss()
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self.show_popup("Success", "Label printed successfully!")
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else:
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popup.dismiss()
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self.show_popup("Error", "Failed to print label")
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except Exception as e:
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popup.dismiss()
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self.show_popup("Error", f"Print error: {str(e)}")
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thread = threading.Thread(target=print_thread)
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thread.daemon = True
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thread.start()
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def show_popup(self, title, message):
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"""Show a popup message"""
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popup = Popup(
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title=title,
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content=BoxLayout(
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orientation='vertical',
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padding=10,
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spacing=10
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),
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size_hint=(0.6, 0.3)
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)
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popup.content.add_widget(Label(text=message))
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close_button = Button(text='OK', size_hint_y=0.3)
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close_button.bind(on_press=popup.dismiss)
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popup.content.add_widget(close_button)
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popup.open()
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if __name__ == '__main__':
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app = LabelPrinterApp()
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app.run()
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class LabelPrinterApp(App):
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"""Main Kivy application for label printing"""
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def __init__(self, **kwargs):
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super().__init__(**kwargs)
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self.available_printers = self.get_available_printers()
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self.preview_widget = None
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def get_available_printers(self):
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"""Get list of available printers from CUPS"""
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try:
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conn = cups.Connection()
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printers = conn.getPrinters()
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return list(printers.keys()) if printers else ["PDF"]
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except Exception as e:
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print(f"Error getting printers: {e}")
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return ["PDF"]
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def build(self):
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"""Build the main UI"""
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self.title = "Label Printer Interface"
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# Main layout - horizontal split between input and preview
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main_layout = BoxLayout(orientation='horizontal', spacing=10, padding=10)
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# Left column - Input form
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left_column = self.create_input_column()
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# Right column - Preview
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right_column = self.create_preview_column()
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main_layout.add_widget(left_column)
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main_layout.add_widget(right_column)
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return main_layout
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def create_input_column(self):
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"""Create the left column with input fields"""
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container = BoxLayout(orientation='vertical', size_hint_x=0.4, spacing=10)
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# Title
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title = Label(text='[b]Label Information[/b]', markup=True, size_hint_y=0.08,
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font_size='18sp')
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container.add_widget(title)
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# Scroll view for form
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scroll = ScrollView(size_hint_y=0.85)
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form_layout = GridLayout(cols=1, spacing=10, size_hint_y=None, padding=10)
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form_layout.bind(minimum_height=form_layout.setter('height'))
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# SAP-Nr. Articol
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sap_label = Label(text='SAP-Nr. Articol:', size_hint_y=None, height=40,
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font_size='14sp')
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form_layout.add_widget(sap_label)
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self.sap_input = TextInput(
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multiline=False,
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size_hint_y=None,
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height=50,
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font_size='16sp',
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background_color=(0.95, 0.95, 0.95, 1)
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)
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self.sap_input.bind(text=self.on_input_change)
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form_layout.add_widget(self.sap_input)
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# Cantitate
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qty_label = Label(text='Cantitate:', size_hint_y=None, height=40,
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font_size='14sp')
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form_layout.add_widget(qty_label)
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self.qty_input = TextInput(
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multiline=False,
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size_hint_y=None,
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height=50,
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font_size='16sp',
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input_filter='int',
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background_color=(0.95, 0.95, 0.95, 1)
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)
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self.qty_input.bind(text=self.on_input_change)
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form_layout.add_widget(self.qty_input)
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# ID rola cablu
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cable_id_label = Label(text='ID rola cablu:', size_hint_y=None, height=40,
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font_size='14sp')
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form_layout.add_widget(cable_id_label)
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self.cable_id_input = TextInput(
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multiline=False,
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size_hint_y=None,
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height=50,
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font_size='16sp',
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background_color=(0.95, 0.95, 0.95, 1)
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)
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self.cable_id_input.bind(text=self.on_input_change)
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form_layout.add_widget(self.cable_id_input)
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# Printer selection
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printer_label = Label(text='Select Printer:', size_hint_y=None, height=40,
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font_size='14sp')
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form_layout.add_widget(printer_label)
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printer_spinner = Spinner(
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text=self.available_printers[0] if self.available_printers else "No Printers",
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values=self.available_printers,
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size_hint_y=None,
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height=50,
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font_size='14sp'
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)
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self.printer_spinner = printer_spinner
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form_layout.add_widget(printer_spinner)
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scroll.add_widget(form_layout)
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container.add_widget(scroll)
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# Print button
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print_button = Button(
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text='PRINT LABEL',
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size_hint_y=0.15,
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font_size='16sp',
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background_color=(0.2, 0.6, 0.2, 1),
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background_normal='',
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bold=True
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)
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print_button.bind(on_press=self.print_label)
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container.add_widget(print_button)
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return container
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def create_preview_column(self):
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"""Create the right column with preview"""
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container = BoxLayout(orientation='vertical', size_hint_x=0.6, spacing=10)
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# Title
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title = Label(text='[b]Label Preview (11.5cm x 8cm)[/b]', markup=True,
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size_hint_y=0.08, font_size='18sp')
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container.add_widget(title)
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# Preview canvas
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self.preview_widget = LabelPreviewWidget(size_hint_y=0.92)
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container.add_widget(self.preview_widget)
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return container
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def on_input_change(self, instance, value):
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"""Update preview when input changes"""
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# Get all input values
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sap_nr = self.sap_input.text
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quantity = self.qty_input.text
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cable_id = self.cable_id_input.text
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# Create label text combining all fields
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if sap_nr or quantity or cable_id:
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label_text = f"{sap_nr}|{quantity}|{cable_id}"
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self.preview_widget.update_preview(label_text)
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def print_label(self, instance):
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"""Handle print button press"""
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sap_nr = self.sap_input.text.strip()
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quantity = self.qty_input.text.strip()
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cable_id = self.cable_id_input.text.strip()
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printer = self.printer_spinner.text
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# Validate input
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if not sap_nr and not quantity and not cable_id:
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self.show_popup("Error", "Please enter at least one field")
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return
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# Create combined label text
|
||||
label_text = f"{sap_nr}|{quantity}|{cable_id}"
|
||||
|
||||
# Show loading popup
|
||||
popup = Popup(
|
||||
title='Printing',
|
||||
content=BoxLayout(
|
||||
orientation='vertical',
|
||||
padding=10,
|
||||
spacing=10
|
||||
),
|
||||
size_hint=(0.6, 0.3)
|
||||
)
|
||||
|
||||
popup.content.add_widget(Label(text='Printing label...\nPlease wait'))
|
||||
popup.open()
|
||||
|
||||
# Print in background thread
|
||||
def print_thread():
|
||||
try:
|
||||
success = print_label_standalone(label_text, printer, preview=0)
|
||||
if success:
|
||||
popup.dismiss()
|
||||
self.show_popup("Success", "Label printed successfully!")
|
||||
else:
|
||||
popup.dismiss()
|
||||
self.show_popup("Error", "Failed to print label")
|
||||
except Exception as e:
|
||||
popup.dismiss()
|
||||
self.show_popup("Error", f"Print error: {str(e)}")
|
||||
|
||||
thread = threading.Thread(target=print_thread)
|
||||
thread.daemon = True
|
||||
thread.start()
|
||||
|
||||
def show_popup(self, title, message):
|
||||
"""Show a popup message"""
|
||||
popup = Popup(
|
||||
title=title,
|
||||
content=BoxLayout(
|
||||
orientation='vertical',
|
||||
padding=10,
|
||||
spacing=10
|
||||
),
|
||||
size_hint=(0.6, 0.3)
|
||||
)
|
||||
|
||||
popup.content.add_widget(Label(text=message))
|
||||
|
||||
close_button = Button(text='OK', size_hint_y=0.3)
|
||||
close_button.bind(on_press=popup.dismiss)
|
||||
popup.content.add_widget(close_button)
|
||||
|
||||
popup.open()
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
app = LabelPrinterApp()
|
||||
app.run()
|
||||
Reference in New Issue
Block a user