How to lock the rotation of a rectangle using FabricJS?
In this tutorial, we will learn how to lock the rotation of a rectangle using FabricJS. Just as we can specify the position, color, opacity, and dimensions of a rectangular object within the canvas, we can also specify whether it is rotated. This can be done using the lockRotation attribute.
Syntax
new fabric.Rect({ lockRotation : Boolean }: Object)Parameters
Options (optional) - This parameter is a ## that provides additional customization #Object to our rectangle. Using this parameter, you can change properties such as color, cursor, stroke width, and many other properties related to the object for which lockRotation is an attribute.
lockRotation - This property accepts a Boolean value. If we give it a "true" value, the object rotation will be locked.
Default behavior of rectangle objects in canvas
Let's look at a code example to understand how The default behavior of rectangular objects when using the lockRotation property. By default, we can rotate a rectangular object counterclockwise or clockwise.<!DOCTYPE html>
<html>
<head>
<!-- Adding the Fabric JS Library-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
<h2 id="Default-behaviour-of-a-Rectangle-object-in-the-canvas">Default behaviour of a Rectangle object in the canvas</h2>
<p>You can try rotating the rectangle to see the default behaviour</p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
// Initiate a rectangle object
var rect = new fabric.Rect({
left: 55,
top: 90,
width: 170,
height: 70,
fill: "black",
padding: 9,
stroke: "#483d8b",
strokeWidth: 5,
});
// Add it to the canvas
canvas.add(rect);
</script>
</body>
</html>Pass lockRotation as key with True value
In this example we will see how to stop the function usage of rectangle lockRotation property to rotate the object. As we can see, as soon as we try to rotate the rectangular object, the cursor is displayed which is not allowed. This means that rotation operations are no longer allowed.<!DOCTYPE html>
<html>
<head>
<!-- Adding the Fabric JS Library-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
<h2 id="Passing-lockRotation-as-key-with-a-True-value">Passing lockRotation as key with a True value</h2>
<p>Try rotating the object and you will see a not-allowed cursor on the rotate handle</p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
// Initiate a rectangle object
var rect = new fabric.Rect({
left: 55,
top: 90,
width: 170,
height: 70,
fill: "black",
padding: 9,
stroke: "#483d8b",
strokeWidth: 5,
lockRotation: true,
});
// Add it to the canvas
canvas.add(rect);
</script>
</body>
</html>The above is the detailed content of How to lock the rotation of a rectangle using FabricJS?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1385
52
What should I do if I encounter garbled code printing for front-end thermal paper receipts?
Apr 04, 2025 pm 02:42 PM
Frequently Asked Questions and Solutions for Front-end Thermal Paper Ticket Printing In Front-end Development, Ticket Printing is a common requirement. However, many developers are implementing...
Who gets paid more Python or JavaScript?
Apr 04, 2025 am 12:09 AM
There is no absolute salary for Python and JavaScript developers, depending on skills and industry needs. 1. Python may be paid more in data science and machine learning. 2. JavaScript has great demand in front-end and full-stack development, and its salary is also considerable. 3. Influencing factors include experience, geographical location, company size and specific skills.
How to merge array elements with the same ID into one object using JavaScript?
Apr 04, 2025 pm 05:09 PM
How to merge array elements with the same ID into one object in JavaScript? When processing data, we often encounter the need to have the same ID...
Demystifying JavaScript: What It Does and Why It Matters
Apr 09, 2025 am 12:07 AM
JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.
The difference in console.log output result: Why are the two calls different?
Apr 04, 2025 pm 05:12 PM
In-depth discussion of the root causes of the difference in console.log output. This article will analyze the differences in the output results of console.log function in a piece of code and explain the reasons behind it. �...
TypeScript for Beginners, Part 2: Basic Data Types
Mar 19, 2025 am 09:10 AM
Once you have mastered the entry-level TypeScript tutorial, you should be able to write your own code in an IDE that supports TypeScript and compile it into JavaScript. This tutorial will dive into various data types in TypeScript. JavaScript has seven data types: Null, Undefined, Boolean, Number, String, Symbol (introduced by ES6) and Object. TypeScript defines more types on this basis, and this tutorial will cover all of them in detail. Null data type Like JavaScript, null in TypeScript
How to achieve parallax scrolling and element animation effects, like Shiseido's official website?
or:
How can we achieve the animation effect accompanied by page scrolling like Shiseido's official website?
Apr 04, 2025 pm 05:36 PM
Discussion on the realization of parallax scrolling and element animation effects in this article will explore how to achieve similar to Shiseido official website (https://www.shiseido.co.jp/sb/wonderland/)...
Can PowerPoint run JavaScript?
Apr 01, 2025 pm 05:17 PM
JavaScript can be run in PowerPoint, and can be implemented by calling external JavaScript files or embedding HTML files through VBA. 1. To use VBA to call JavaScript files, you need to enable macros and have VBA programming knowledge. 2. Embed HTML files containing JavaScript, which are simple and easy to use but are subject to security restrictions. Advantages include extended functions and flexibility, while disadvantages involve security, compatibility and complexity. In practice, attention should be paid to security, compatibility, performance and user experience.
