Add a PDF reading example

Author: yushulx

examples/official/pdf/README.md

@@ -0,0 +1,98 @@
+# Dynamsoft Barcode Reader - Enhanced GUI Application
+
+A modern, feature-rich GUI application for barcode detection and reading using the Dynamsoft Capture Vision SDK. This application provides a comprehensive graphical interface for processing images and PDF files with professional barcode detection capabilities.
+
+## 🚀 Features
+
+### Core Functionality
+- **Multi-format Support**: JPG, PNG, BMP, TIFF, WEBP image files
+- **Native PDF Support**: Multi-page PDF processing using Dynamsoft SDK (no external dependencies)
+- **Real-time Detection**: Fast barcode detection with visual annotations
+- **Multi-page Navigation**: Easy navigation through PDF pages
+
+### User Interface
+- **Modern GUI**: Clean, intuitive interface with professional styling
+- **Zoom & Pan**: Interactive image viewing with zoom controls (10%-500%)
+- **Beautiful Results Display**: Color-coded results with background highlights
+- **Drag & Drop**: Enhanced file loading support
+- **Professional Layout**: Organized panels with clear visual hierarchy
+
+### Results Management
+- **Beautiful Formatting**: Enhanced result display with emojis, colors, and professional styling
+- **Detailed Results**: Format, content, location with corner labels (TL, TR, BR, BL)
+- **Smart Area Display**: Area calculations with K-unit formatting for large values
+- **Export Options**: Export to TXT, CSV, or JSON formats
+- **Clipboard Support**: Quick copy results to clipboard
+- **Multi-page Results**: Organize results by page for PDF files
+
+### Processing Options
+- **Auto-processing**: Automatically detect barcodes when files are loaded
+- **Confidence Display**: Optional confidence scores for each detection
+- **Progress Tracking**: Real-time processing status and timing
+- **Memory Monitoring**: Optional memory usage display
+
+## 📋 Requirements
+
+- Required Dependencies
+
+    ```bash
+    pip install dynamsoft-capture-vision-bundle opencv-python Pillow tkinterdnd2 psutil
+    ```
+
+- [30-day trial license](https://www.dynamsoft.com/customer/license/trialLicense/?product=dcv&package=cross-platform)
+
+## 🎯 Quick Start
+
+### Run the Enhanced GUI
+```bash
+python gui_barcode_reader_enhanced.py
+```
+### Alternative: Command Line Interface
+```bash
+python command_line.py
+```
+
+## 📁 File Structure
+
+```
+📂 project/
+├── 📄 command_line.py                  # Command-line interface
+├── 🖥️ gui_barcode_reader_enhanced.py   # Enhanced GUI application
+├──  requirements.txt                # Dependencies list
+├── 📖 README.md                       # This documentation
+└── 🎯 Sample files (barcode.jpg, barcodes.pdf)
+```
+
+## 🔧 Usage Guide
+
+### Loading Files
+1. **Click "📂 Load File"** button to browse for files
+2. **Drag and drop** files directly onto the image area (enhanced support)
+3. Supported formats: JPG, PNG, BMP, TIFF, WEBP, PDF (native support)
+
+### Navigation (PDF Files)
+- Use **◀ Prev/Next ▶** buttons for page navigation
+- **Go to page** field for direct page jumping
+- Page counter shows current position (e.g., "Page: 2/5")
+
+### Image Controls
+- **Zoom dropdown**: Select zoom level (10%-500% or Fit)
+- **Zoom buttons**: Quick zoom in/out (🔍+ / 🔍-)
+- **Reset button**: Return to fit-to-window view (↻)
+- **Mouse wheel**: Zoom with Ctrl+scroll
+
+### Processing
+- **Auto-process**: Automatically detect barcodes when loading files
+- **🔍 Detect Barcodes**: Manual processing trigger
+- **Show confidence**: Toggle confidence scores display
+
+### Results Display
+- **Beautiful Formatting**: Color-coded results with professional styling
+- **Corner Labels**: Location points shown as TL→TR→BR→BL format
+- **Smart Units**: Area display with K-units for large values
+- **Export**: Save results to TXT, CSV, or JSON files
+- **Copy**: Quick copy to clipboard
+- **Page Summary**: Shows barcode count per page
+
+
+