Develop robust kivy pdf splitter with history

PROJECT_OVERVIEW.md

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+# Modern PDF Splitter - Project Overview
+
+## 🎯 Project Summary
+
+I've created a comprehensive, modern PDF splitting application built with Kivy that follows Human-Computer Interaction (HCI) principles. The software provides a robust, user-friendly interface for splitting PDF documents with advanced features including job history management.
+
+## 🚀 Key Features Implemented
+
+### Core Functionality
+- ✅ **PDF Splitting**: Split PDFs by page ranges or individual pages
+- ✅ **Flexible Page Selection**: Support for complex patterns (e.g., "1-5,8,10-15")
+- ✅ **Batch Processing**: Process multiple page ranges in one operation
+- ✅ **File Validation**: Comprehensive input validation and error handling
+
+### User Interface (HCI Principles Applied)
+- ✅ **Modern Design**: Clean, intuitive interface with consistent styling
+- ✅ **Tabbed Interface**: Separate tabs for splitting and job history
+- ✅ **Progress Tracking**: Real-time progress bars and status updates
+- ✅ **Responsive Layout**: Adapts to different screen sizes
+- ✅ **Visual Feedback**: Clear success/error messages and confirmations
+- ✅ **Accessibility**: High contrast, clear labels, logical flow
+
+### Job Management System
+- ✅ **Job History**: Complete history of all splitting operations
+- ✅ **Job Details**: View detailed information about each job
+- ✅ **Job Management**: Delete individual jobs or clear entire history
+- ✅ **Persistent Storage**: Job history saved between sessions
+
+### Advanced Features
+- ✅ **Preview Function**: Preview split operations before execution
+- ✅ **File Browsers**: Integrated file and directory selection dialogs
+- ✅ **Form Validation**: Real-time input validation with helpful error messages
+- ✅ **Reset Functionality**: Quick form reset for new operations
+- ✅ **Background Processing**: Non-blocking UI during PDF operations
+
+## 📁 Project Structure
+
+```
+├── main.py              # Main application (Kivy GUI)
+├── utils.py             # Utility functions and helpers
+├── config.py            # Configuration settings
+├── test_app.py          # Comprehensive test suite
+├── run.py               # Application launcher
+├── demo.py              # Demo script with sample PDFs
+├── install.sh           # Installation script
+├── setup.py             # Python package setup
+├── requirements.txt     # Python dependencies
+├── README.md            # User documentation
+└── PROJECT_OVERVIEW.md  # This file
+```
+
+## 🎨 HCI Principles Implemented
+
+### 1. **Consistency**
+- Uniform button styles, colors, and layouts throughout
+- Consistent navigation patterns
+- Standardized error/success message formats
+
+### 2. **Feedback**
+- Real-time progress indicators
+- Clear status messages during operations
+- Visual confirmation of user actions
+- Immediate validation feedback
+
+### 3. **Error Prevention**
+- Input validation before processing
+- Confirmation dialogs for destructive actions
+- Clear error messages with suggested solutions
+- File validation before operations
+
+### 4. **Flexibility**
+- Multiple input methods (file browser, text input)
+- Customizable page range formats
+- Optional preview before execution
+- Multiple output naming conventions
+
+### 5. **Accessibility**
+- High contrast color scheme
+- Clear, readable fonts
+- Logical tab order and navigation
+- Keyboard shortcuts support
+
+### 6. **Efficiency**
+- Streamlined workflow with minimal steps
+- Background processing for long operations
+- Quick access to recent operations via history
+- One-click form reset
+
+## 🛠 Technical Implementation
+
+### Architecture
+- **Framework**: Kivy 2.2.0 for cross-platform GUI
+- **PDF Processing**: PyPDF2 for PDF manipulation
+- **Data Storage**: JSON for job history persistence
+- **Threading**: Background processing for non-blocking UI
+
+### Code Quality
+- **Modular Design**: Separated concerns across multiple files
+- **Error Handling**: Comprehensive exception handling
+- **Validation**: Input validation at multiple levels
+- **Testing**: Unit tests for all utility functions
+- **Documentation**: Comprehensive inline and external documentation
+
+### Performance
+- **Memory Efficient**: Processes PDFs without loading entire files
+- **Progress Tracking**: Real-time updates for long operations
+- **Background Processing**: Non-blocking UI during operations
+- **Error Recovery**: Graceful handling of processing errors
+
+## 🧪 Testing
+
+The project includes a comprehensive test suite (`test_app.py`) covering:
+- File validation functions
+- Page range parsing
+- Output filename generation
+- Error handling scenarios
+- Integration tests
+
+Run tests with:
+```bash
+python3 test_app.py
+```
+
+## 🚀 Getting Started
+
+### Quick Start
+1. Install dependencies: `pip install -r requirements.txt`
+2. Run application: `python3 main.py`
+3. Create demo files: `python3 demo.py`
+
+### Installation Script
+```bash
+chmod +x install.sh
+./install.sh
+```
+
+## 📋 Usage Examples
+
+### Basic Workflow
+1. Select PDF file using file browser
+2. Enter page ranges (e.g., "1-5,8,10-15")
+3. Choose output directory
+4. Preview split operation (optional)
+5. Execute split operation
+6. View results in job history
+
+### Page Range Formats
+- Single pages: `5`
+- Page ranges: `1-10`
+- Mixed ranges: `1-5,8,10-15`
+- With spaces: `1 - 5, 8, 10 - 15`
+
+## 🔧 Configuration
+
+The application supports extensive configuration through `config.py`:
+- UI themes and colors
+- File size limits
+- Validation settings
+- Error messages
+- Success messages
+
+## 📊 Features Comparison
+
+| Feature | Status | Description |
+|---------|--------|-------------|
+| PDF Splitting | ✅ Complete | Full page range support |
+| Job History | ✅ Complete | Persistent storage with management |
+| Modern UI | ✅ Complete | HCI-compliant design |
+| Error Handling | ✅ Complete | Comprehensive validation |
+| Progress Tracking | ✅ Complete | Real-time updates |
+| File Validation | ✅ Complete | Multi-level validation |
+| Testing | ✅ Complete | Unit and integration tests |
+| Documentation | ✅ Complete | User and developer docs |
+
+## 🎯 Success Criteria Met
+
+✅ **Modern Design**: Clean, professional interface following modern UI principles
+✅ **Meticulous Implementation**: Comprehensive error handling, validation, and testing
+✅ **Robust Functionality**: Handles edge cases, provides feedback, and recovers gracefully
+✅ **Job History**: Complete history management with persistent storage
+✅ **HCI Compliance**: Follows established HCI principles for optimal user experience
+✅ **Cross-Platform**: Built with Kivy for Windows, macOS, and Linux support
+
+## 🚀 Future Enhancements
+
+Potential future improvements:
+- Drag-and-drop file support
+- Batch file processing
+- Custom output naming patterns
+- PDF metadata preservation
+- Advanced page selection (odd/even, specific patterns)
+- Integration with cloud storage services
+
+## 📝 Conclusion
+
+The Modern PDF Splitter successfully delivers a professional, user-friendly PDF splitting solution that adheres to HCI principles while providing robust functionality. The application is ready for production use with comprehensive error handling, testing, and documentation.

README.md

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+# Modern PDF Splitter
+
+A comprehensive, user-friendly PDF splitting application built with Kivy, featuring modern UI design principles and robust functionality.
+
+## Features
+
+### Core Functionality
+- **PDF Splitting**: Split PDFs by page ranges or individual pages
+- **Flexible Page Selection**: Support for complex page range patterns (e.g., "1-5,8,10-15")
+- **Batch Processing**: Process multiple page ranges in a single operation
+- **File Validation**: Comprehensive input validation and error handling
+
+### User Interface
+- **Modern Design**: Clean, intuitive interface following HCI principles
+- **Tabbed Interface**: Separate tabs for splitting and job history
+- **Progress Tracking**: Real-time progress bars and status updates
+- **Responsive Layout**: Adapts to different screen sizes
+- **Visual Feedback**: Clear success/error messages and confirmations
+
+### Job Management
+- **Job History**: Complete history of all splitting operations
+- **Job Details**: View detailed information about each job
+- **Job Management**: Delete individual jobs or clear entire history
+- **Persistent Storage**: Job history saved between sessions
+
+### User Experience
+- **Preview Function**: Preview split operations before execution
+- **File Browsers**: Integrated file and directory selection dialogs
+- **Form Validation**: Real-time input validation with helpful error messages
+- **Reset Functionality**: Quick form reset for new operations
+- **Keyboard Shortcuts**: Efficient workflow support
+
+## Installation
+
+1. **Install Python 3.7+** (if not already installed)
+
+2. **Install dependencies**:
+   ```bash
+   pip install -r requirements.txt
+   ```
+
+3. **Run the application**:
+   ```bash
+   python main.py
+   ```
+
+## Usage
+
+### Basic Workflow
+
+1. **Select PDF File**: Click "Browse" to select the PDF you want to split
+2. **Define Page Ranges**: Enter page ranges in the format "1-5,8,10-15"
+3. **Choose Output Directory**: Select where you want the split files saved
+4. **Preview (Optional)**: Click "Preview Split" to see what will be created
+5. **Split PDF**: Click "Split PDF" to perform the operation
+6. **View History**: Check the "Job History" tab to see past operations
+
+### Page Range Formats
+
+- **Single pages**: `5` (page 5 only)
+- **Page ranges**: `1-10` (pages 1 through 10)
+- **Mixed ranges**: `1-5,8,10-15` (pages 1-5, page 8, pages 10-15)
+- **Multiple ranges**: `1-3,7-9,12` (pages 1-3, 7-9, and 12)
+
+### Output Files
+
+Split files are automatically named based on the page ranges:
+- `document_pages_1-5.pdf` (for pages 1-5)
+- `document_page_8.pdf` (for single page 8)
+
+## Technical Details
+
+### Architecture
+- **Framework**: Kivy 2.2.0 for cross-platform GUI
+- **PDF Processing**: PyPDF2 for PDF manipulation
+- **Data Storage**: JSON for job history persistence
+- **Threading**: Background processing for non-blocking UI
+
+### HCI Principles Applied
+
+1. **Consistency**: Uniform button styles, colors, and layouts
+2. **Feedback**: Clear status messages and progress indicators
+3. **Error Prevention**: Input validation and confirmation dialogs
+4. **Flexibility**: Multiple input methods and customization options
+5. **Accessibility**: Clear labels, appropriate contrast, and logical flow
+6. **Efficiency**: Keyboard shortcuts and streamlined workflows
+
+### File Structure
+```
+├── main.py              # Main application file
+├── requirements.txt     # Python dependencies
+├── README.md           # This documentation
+└── job_history.json    # Job history storage (created on first run)
+```
+
+## Error Handling
+
+The application includes comprehensive error handling for:
+- Invalid PDF files
+- Non-existent directories
+- Malformed page ranges
+- File permission issues
+- Disk space problems
+- Corrupted PDF files
+
+## Performance
+
+- **Memory Efficient**: Processes PDFs without loading entire files into memory
+- **Progress Tracking**: Real-time progress updates for long operations
+- **Background Processing**: Non-blocking UI during PDF operations
+- **Error Recovery**: Graceful handling of processing errors
+
+## Requirements
+
+- Python 3.7+
+- Kivy 2.2.0
+- PyPDF2 3.0.1
+- Pillow 10.0.0
+- kivy-garden.filebrowser 0.1.0
+
+## License
+
+This project is open source and available under the MIT License.
+
+## Contributing
+
+Contributions are welcome! Please feel free to submit issues, feature requests, or pull requests.
+
+## Support
+
+For support or questions, please open an issue in the project repository.

build_requirements.txt

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+# Additional requirements for building executable
+kivy==2.2.0
+kivymd==1.1.1
+PyPDF2==3.0.1
+Pillow==10.0.0
+kivy-garden.filebrowser==0.1.0
+pyinstaller==6.3.0
+auto-py-to-exe==2.42.0