""" QR Code Generator - Streamlit Application A web application for generating QR codes with optional logo overlay and export in multiple formats and resolutions. """ import streamlit as st from PIL import Image import io from utils.qr_generator import QRCodeGenerator from utils.wifi_qr import WiFiQRCode # Page configuration st.set_page_config( page_title="QR Code Generator", page_icon="📱", layout="centered", initial_sidebar_state="expanded" ) def main(): """Main application function.""" st.title("QR Code Generator") st.markdown("Generate professional QR codes with optional logo overlay") # Sidebar configuration with st.sidebar: st.header("Configuration") # Error correction level error_correction = st.selectbox( "Error Correction Level", options=["L (7%)", "M (15%)", "Q (25%)", "H (30%)"], index=3, help="Higher levels allow more damage/obscurity. Use H (30%) for logos." ) error_level = error_correction[0] # QR code appearance st.subheader("Appearance") fill_color = st.color_picker("QR Code Color", "#000000") back_color = st.color_picker("Background Color", "#FFFFFF") # Export settings st.subheader("Export Settings") export_format = st.selectbox( "Format", options=["PNG", "JPEG", "SVG"], help="SVG is vector format (scalable), PNG/JPEG are raster formats" ) if export_format in ["PNG", "JPEG"]: # Define resolution options resolution_labels = { 500: "Low (500px)", 1000: "Medium (1000px)", 2000: "High (2000px)", 4000: "Ultra (4000px)" } target_size = st.select_slider( "Resolution", options=[500, 1000, 2000, 4000], value=2000, # Default to High format_func=lambda x: resolution_labels[x] ) else: svg_scale = st.slider( "SVG Scale", min_value=5, max_value=20, value=10, help="Scale factor for SVG output" ) # Main content area st.divider() # Mode selection qr_mode = st.radio( "QR Code Type", options=["URL", "WiFi"], horizontal=True, help="Choose what type of QR code to generate" ) st.divider() # Content input based on mode if qr_mode == "URL": # URL input url = st.text_input( "Enter URL", placeholder="https://example.com", help="Enter the URL you want to encode in the QR code" ) qr_content = url else: # WiFi input fields st.subheader("WiFi Network Details") col1, col2 = st.columns(2) with col1: wifi_ssid = st.text_input( "Network Name (SSID)", placeholder="MyWiFiNetwork", help="The name of your WiFi network" ) wifi_security = st.selectbox( "Security Type", options=["WPA/WPA2", "WEP", "None (Open)"], help="WiFi security/encryption type" ) with col2: wifi_password = st.text_input( "Password", type="password", placeholder="Enter WiFi password", help="Leave empty for open networks" ) wifi_hidden = st.checkbox( "Hidden Network", value=False, help="Check if this is a hidden network" ) # Map security display to QR code format security_map = { "WPA/WPA2": "WPA", "WEP": "WEP", "None (Open)": "nopass" } # Generate WiFi QR string if wifi_ssid: wifi_qr = WiFiQRCode( ssid=wifi_ssid, password=wifi_password if wifi_security != "None (Open)" else "", security=security_map[wifi_security], hidden=wifi_hidden ) qr_content = wifi_qr.to_string() else: qr_content = "" # Logo upload (optional) st.subheader("Logo (Optional)") logo_file = st.file_uploader( "Upload logo image", type=["png", "jpg", "jpeg"], help="Upload a logo to place in the center of the QR code" ) if logo_file: logo_size_ratio = st.slider( "Logo Size", min_value=0.1, max_value=0.4, value=0.3, step=0.05, help="Logo size as ratio of QR code size" ) # Generate button if st.button("Generate QR Code", type="primary", use_container_width=True): if not qr_content: if qr_mode == "URL": st.error("Please enter a URL") else: st.error("Please enter WiFi network name (SSID)") return try: with st.spinner("Generating QR code..."): # Initialize generator generator = QRCodeGenerator(qr_content, error_level) # Generate QR code if export_format == "SVG": # Generate SVG directly svg_data = generator.generate_svg(scale=svg_scale) # Display preview (SVG as image) st.success("QR Code generated successfully!") st.image(svg_data, caption="QR Code Preview") # Download button file_prefix = "wifi_qr" if qr_mode == "WiFi" else "url_qr" st.download_button( label=f"Download QR Code (SVG)", data=svg_data, file_name=f"{file_prefix}.svg", mime="image/svg+xml", use_container_width=True ) else: # Generate raster image (PNG/JPEG) qr_image = generator.generate_qr_image( box_size=20, border=4, fill_color=fill_color, back_color=back_color ) # Add logo if provided if logo_file: logo_image = Image.open(logo_file) qr_image = generator.add_logo( qr_image, logo_image, logo_size_ratio ) # Resize to target resolution qr_image = generator.resize_image( qr_image, (target_size, target_size) ) # Export image image_data = generator.export_image( qr_image, format=export_format, quality=95 ) # Display preview st.success("QR Code generated successfully!") st.image(qr_image, caption="QR Code Preview") # Download button mime_types = { "PNG": "image/png", "JPEG": "image/jpeg" } file_prefix = "wifi_qr" if qr_mode == "WiFi" else "url_qr" st.download_button( label=f"Download QR Code ({export_format}, {target_size}px)", data=image_data, file_name=f"{file_prefix}.{export_format.lower()}", mime=mime_types[export_format], use_container_width=True ) # Display QR code info with st.expander("QR Code Information"): st.write(f"**Type:** {qr_mode}") if qr_mode == "URL": st.write(f"**URL:** {qr_content}") else: st.write(f"**Network:** {wifi_ssid}") st.write(f"**Security:** {wifi_security}") st.write(f"**Hidden:** {'Yes' if wifi_hidden else 'No'}") st.write(f"**Error Correction:** {error_correction}") st.write(f"**Format:** {export_format}") if export_format in ["PNG", "JPEG"]: st.write(f"**Resolution:** {target_size}x{target_size}px") st.write(f"**Logo:** {'Yes' if logo_file else 'No'}") except Exception as e: st.error(f"Error generating QR code: {str(e)}") st.exception(e) # Footer st.divider() st.markdown( """

Built with Streamlit | QR Code Generator v1.0

Tip: Use high error correction (H) when adding logos

""", unsafe_allow_html=True ) if __name__ == "__main__": main()