scratchfoundation/scratch-blocks
Scratch Blocks
Scratch-blocks is a block-based visual programming library and framework used to create graphical programming interfaces. It provides a visual environment that translates interlocking blocks into executable code, serving as a foundation for educational coding interfaces and visual programming languages.
The project is implemented as a customized extension of the Google Blockly ecosystem. It enables the development of domain-specific languages through a drag-and-drop interface, supporting the creation of custom block libraries and no-code tool development.
The framework handles the structural mechanisms of block-based systems, including constraint-based snapping, coordinate-based positioning, and event-driven input. It manages program state through JSON-based serialization and uses schema-driven definitions to determine block appearance and connectivity.
Features
- Educational Programming Environments - Serves as a foundation for integrated platforms that teach software development concepts through visual block editors.
- Block-Based Visual Interfaces - Implements a drag-and-drop interlocking block editor for building logic without manual coding.
- Blockly Extensions - Implemented as a specialized extension of the Google Blockly ecosystem for educational scripting.
- Visual Programming Tools - Provides an environment for creating graphical programming interfaces that define application logic through interlocking blocks.
- Visual Block Designers - Provides an interface for designing specialized graphical components that represent specific functions in a visual language.
- Visual Language Frameworks - Provides a framework for defining the shapes, behaviors, and input fields of custom blocks for domain-specific languages.
- Block-Based Code Generators - Translates visual arrangements of interlocking blocks into executable source code for beginners and students.
- Block-Based Coding Libraries - Provides a comprehensive framework for creating visual programming languages that translate block arrangements into executable code.
- Visual Block Schemas - Uses configuration-driven schemas to define the visual appearance and connectivity rules of programming blocks.
- No-Code Platforms - Enables the development of software that allows non-programmers to build complex workflows using a visual block system.
- JSON Serializers - Converts nested block hierarchies into structured JSON trees for saving and loading program state.
- Workspace Coordinate Management - Manages a global 2D workspace coordinate system for free-form movement, zooming, and panning of visual blocks.
- Event-Driven Input Handlers - Utilizes a centralized event system to map mouse and keyboard inputs to mutations of visual programming blocks.
- Block Snapping Logic - Implements constraint-based snapping to ensure programming blocks align correctly during drag-and-drop interactions.
