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aterrien avatar

aterrien/jQuery-Knob

0
View on GitHub↗
5,000 stars·1,202 forks·JavaScript·MIT·11 views

JQuery Knob

jQuery Knob is a rotatable dial UI widget for web pages that translates circular drag movements into numerical values. It is a touch-enabled input component rendered via the HTML5 canvas API, providing a graphical interface for numerical data entry through the jQuery library.

The component is highly customizable, allowing for adjustments to colors, fonts, rotation constraints, and arc dimensions. It supports a variety of interaction methods, including mouse, mousewheel, keyboard, and touch events.

The widget includes systems for managing input constraints such as minimum and maximum values and step increments. It also provides utilities for output value formatting and mechanisms for intercepting interaction events to trigger custom logic during value changes.

Features

  • Rotatable Dial Inputs - Implements a rotatable knob UI component for numerical data entry via touch, mouse, and keyboard.
  • HTML5 Canvas Libraries - Renders tactile knob controls for numerical data using the HTML5 Canvas API.
  • Canvas-Based UI Rendering - Implements the dial and value indicator using the HTML5 canvas API for smooth visual updates.
  • Numeric Inputs - Creates a rotatable dial interface for users to adjust numerical values using a mouse or touch screen.
  • jQuery Plugins - Provides a jQuery plugin wrapper to attach input listeners and state management to HTML elements.
  • Angular Delta Calculations - Calculates the change in angle between interaction points to update the input value.
  • Styling Configurations - Uses a settings object to dynamically calculate canvas strokes, colors, and arc dimensions.
  • Polar-to-Cartesian Converters - Translates mouse and touch screen coordinates into rotation angles to determine the numeric input value.
  • Customizable Inputs - Offers a visual input widget with adjustable colors, fonts, and rotation constraints for tailored numeric sliders.
  • Input Event Interceptors - Allows triggering custom logic during value changes, upon releasing the dial, or during canvas redraw events.
  • Input Validation Constraints - Defines minimum and maximum values, step increments, and rotation directions to control dial behavior.
  • Interactive State Updates - Triggers a redraw cycle and value update whenever a user interaction changes the knob rotation.
  • Touch-Enabled Numeric Controls - Supports mouse, mousewheel, keyboard, and touch events for adjusting numeric settings.
  • Visual Style Customization - Allows adjustments to colors, fonts, thickness, and arc size to match the visual style of the interface.

Star history

Star history chart for aterrien/jquery-knobStar history chart for aterrien/jquery-knob

How this analysis was created: This summary and feature list were written by an AI model that read the project's README and public documentation pages. Each feature links to the documentation it came from; stars, license and language come straight from the GitHub API. The model does not read the source code, and the analysis is refreshed when the project is re-analysed. Learn more on our About page.

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Frequently asked questions

What does aterrien/jquery-knob do?

jQuery Knob is a rotatable dial UI widget for web pages that translates circular drag movements into numerical values. It is a touch-enabled input component rendered via the HTML5 canvas API, providing a graphical interface for numerical data entry through the jQuery library.

What are the main features of aterrien/jquery-knob?

The main features of aterrien/jquery-knob are: Rotatable Dial Inputs, HTML5 Canvas Libraries, Canvas-Based UI Rendering, Numeric Inputs, jQuery Plugins, Angular Delta Calculations, Styling Configurations, Polar-to-Cartesian Converters.

What are some open-source alternatives to aterrien/jquery-knob?

Open-source alternatives to aterrien/jquery-knob include: amsul/pickadate.js — pickadate.js is a responsive jQuery date and time picker designed for web forms. It provides a localized input… unmanner/imaskjs — imaskjs is a JavaScript input mask library and DOM input manager used to enforce specific patterns, data types, and… choices-js/choices — Choices is a vanilla JavaScript library used to create customizable select boxes and text inputs without external… jedwatson/react-select — react-select is a customizable select input for React applications that supports single and multiple value selection… pmndrs/leva — Leva is a React GUI control panel and real-time parameter editor used to monitor and tweak application state and… hustcc/canvas-nest.js — canvas-nest.js is a JavaScript animation library used to generate interactive particle networks and connected-line…

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