Web Front-end
JS Tutorial
How to set the minimum allowed scale value of a rectangle using FabricJS?
How to set the minimum allowed scale value of a rectangle using FabricJS?
In this tutorial we will learn how to set the minimum allowed proportions of a rectangle Use FabricJS. Rectangle is one of the various shapes provided by FabricJS. for To create a rectangle we have to create an instance of the Fabric.Rect class and add it to the canvas.
We can customize the rectangular object by adding a fill color, removing its borders, and even changing its dimensions. Likewise, we can also use the minScaleLimit property to set its minimum allowed scale.
Syntax
new fabric.Rect({ minScaleLimit : Number }: Object)Parameters
Options (optional) - This parameter is an object which is our rectangle Provides additional customization. Using this parameter, you can change properties such as color, cursor, border width, and many other properties related to the object for which minScaleLimit is an attribute.
Option Key
minScaleLimit - This property allows us to control the minimum allowed scale value of the rectangle. It accepts digits as value.
Example 1
Default appearance of rectangular objects
Let's look at a code example to see how it works without using minScaleLimit property is what the rectangular object looks like. In this case we will be able to scale the object freely since no minimum limit is set.
<!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-appearance-of-the-rectangle-object">Default appearance of the rectangle object</h2>
<p>You can try scaling the rectangle to see that there is no minimum allowed scale value.</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: 155,
top: 90,
width: 170,
height: 70,
fill: "#6f2da8",
padding: 9,
stroke: "#b666d2",
strokeWidth: 5,
});
// Add it to the canvas
canvas.add(rect);
</script>
</body>
</html>Example 2
Passing the minScaleLimit attribute as a key with a custom value
In this example, We'll see how assigning a value to the minScaleLimit property changes the minimum allowed scale value for a rectangular object in the canvas. Here we are using 0.8 as the value, which means we will not be able to shrink the object to less than 136 pixels width and 56 pixels height, which is calculated by radius*limit (0.8 * 170 = 136 pixels) , 0.8 * 70 = 56 pixels).
<!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-the-minScaleLimit-property-as-key-with-a-custom-value">Passing the minScaleLimit property as key with a custom value</h2>
<p>You can try scaling the rectangle and observer that it isn't possible to scale down the rectangle lesser than a width of 136px and height of 56px.</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: 155,
top: 90,
width: 170,
height: 70,
fill: "#6f2da8",
padding: 9,
stroke: "#b666d2",
strokeWidth: 5,
minScaleLimit: 0.8,
});
// Add it to the canvas
canvas.add(rect);
</script>
</body>
</html>The above is the detailed content of How to set the minimum allowed scale value 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
Replace String Characters in JavaScript
Mar 11, 2025 am 12:07 AM
Detailed explanation of JavaScript string replacement method and FAQ This article will explore two ways to replace string characters in JavaScript: internal JavaScript code and internal HTML for web pages. Replace string inside JavaScript code The most direct way is to use the replace() method: str = str.replace("find","replace"); This method replaces only the first match. To replace all matches, use a regular expression and add the global flag g: str = str.replace(/fi
jQuery Check if Date is Valid
Mar 01, 2025 am 08:51 AM
Simple JavaScript functions are used to check if a date is valid. function isValidDate(s) { var bits = s.split('/'); var d = new Date(bits[2] '/' bits[1] '/' bits[0]); return !!(d && (d.getMonth() 1) == bits[1] && d.getDate() == Number(bits[0])); } //test var
jQuery get element padding/margin
Mar 01, 2025 am 08:53 AM
This article discusses how to use jQuery to obtain and set the inner margin and margin values of DOM elements, especially the specific locations of the outer margin and inner margins of the element. While it is possible to set the inner and outer margins of an element using CSS, getting accurate values can be tricky. // set up $("div.header").css("margin","10px"); $("div.header").css("padding","10px"); You might think this code is
10 jQuery Accordions Tabs
Mar 01, 2025 am 01:34 AM
This article explores ten exceptional jQuery tabs and accordions. The key difference between tabs and accordions lies in how their content panels are displayed and hidden. Let's delve into these ten examples. Related articles: 10 jQuery Tab Plugins
10 Worth Checking Out jQuery Plugins
Mar 01, 2025 am 01:29 AM
Discover ten exceptional jQuery plugins to elevate your website's dynamism and visual appeal! This curated collection offers diverse functionalities, from image animation to interactive galleries. Let's explore these powerful tools: Related Posts: 1
HTTP Debugging with Node and http-console
Mar 01, 2025 am 01:37 AM
http-console is a Node module that gives you a command-line interface for executing HTTP commands. It’s great for debugging and seeing exactly what is going on with your HTTP requests, regardless of whether they’re made against a web server, web serv
Custom Google Search API Setup Tutorial
Mar 04, 2025 am 01:06 AM
This tutorial shows you how to integrate a custom Google Search API into your blog or website, offering a more refined search experience than standard WordPress theme search functions. It's surprisingly easy! You'll be able to restrict searches to y
jquery add scrollbar to div
Mar 01, 2025 am 01:30 AM
The following jQuery code snippet can be used to add scrollbars when the div content exceeds the container element area. (No demonstration, please copy it directly to Firebug) //D = document //W = window //$ = jQuery var contentArea = $(this), wintop = contentArea.scrollTop(), docheight = $(D).height(), winheight = $(W).height(), divheight = $('#c
