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LogicFlow is an SVG-based flowchart editing framework and visual graph editor used for building customizable business process diagrams. It serves as a customizable diagramming engine for rendering business process models, entity relationship diagrams, and unified modeling language charts. The system is characterized by a plugin-based architecture that allows developers to define specialized graphical elements and register pluggable modules. A distinctive feature is its overlay system, which positions standard HTML components on top of the SVG canvas to create interactive menus and control pan

bpmn-js is a browser-based BPMN 2.0 web modeler and rendering engine used for creating, editing, and visualizing business process models. It functions as an XML process modeler that parses BPMN 2.0 XML data into interactive visual diagrams within a web application. The project distinguishes itself as a business process visualizer with capabilities for process flow simulation, which tracks token movement to mimic real-time execution. It also supports diagram version comparison to identify changes between model iterations and provides a layered overlay interface for binding metadata and custom

CSS Layout is a pure CSS pattern library that provides pre-built layout components for common page structures, implemented entirely with CSS using flexbox and grid. The collection focuses on reusable, encapsulated components that handle overlapping elements, vertical centering, sticky footers, and classic page layouts without requiring any JavaScript for rendering or interactivity. The library offers a range of practical layout implementations including centered navigation menus, element stacking techniques, holy grail page layouts, and responsive grid systems. Each pattern is built as a self

Jcrop 是一个 JavaScript 图像裁剪库，提供了一个基于浏览器的界面，供用户交互式地选择和定义图像的矩形区域。它利用基于 DOM 的图像覆盖层将图像包裹在相对容器中，允许放置可调整的选择句柄和边界约束。 该工具通过全面的输入支持脱颖而出，将触摸手势和键盘拦截转换为移动和桌面环境下的精确坐标更新。它具有一个能够强制执行自定义纵横比约束并计算选择区域最大拟合度的引擎，以确保输出尺寸的一致性。 该库涵盖了广泛的图像处理功能，包括坐标转换、选择边界强制执行以及多个裁剪区域的管理。它提供事件驱动的状态同步来跟踪交互变化，并允许恢复之前保存的裁剪状态。 用户可以通过界面样式选项和基于类的逻辑扩展来自定义工具的行为和外观。

This project provides a React component and a set of utilities for implementing interactive image cropping. It enables users to define selection areas over media elements using a draggable and resizable interface. The library supports fixed aspect ratio locking and the definition of custom crop shapes, such as circles. It utilizes a percentage-based coordinate system to ensure the selection interface remains responsive across different screen sizes and layouts. The toolset includes capabilities for real-time crop previewing and the generation of cropped regions using canvas-based rendering.