Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to set the angle of rotation of a Textbox using FabricJS?
In this tutorial, we are going to set the angle of rotation of a Textbox using FabricJS. We can customize, stretch or move around the text written in a textbox. In order to create a textbox, we will have to create an instance of fabric.Textbox class and add it to the canvas. The angle property in FabricJS defines the angle of 2D rotation of an object. We also have the centeredRotation property that allows us to use the center point of a textbox as the origin of transformation.
Syntax
new fabric.Textbox(text: String, { angle: Number, centeredRotation: Boolean }: Object)
Parameters
text − This parameter accepts a String which is the text string that we want to display inside our textbox.
options (optional) − This parameter is an Object which provides additional customizations to our textbox. Using this parameter, properties such as colour, cursor, stroke width and a lot of other properties can be changed related to the textbox of which angle is a property.
Options Keys
angle − This property accepts a Number which specifies the angle of rotation of a textbox in degrees.
centeredRotation − The property accepts a Boolean value which determines whether the center of the textbox is the origin of transformation or not.
Example 1
Passing angle as key with a custom value and disabling the centered rotation for the Textbox
Let’s see a code example to set the angle of rotation of a Textbox in FabricJS. A negative angle specifies counter-clockwise direction, whereas a positive angle specifies a clockwise direction. Since we have assigned centeredRotation a False value, the textbox will rotate while using its corner point as the center of rotation.
<!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>Passing angle as key with a custom value and disabling the centered rotation for the Textbox</h2> <p>You can select and rotate the textbox to verify that it uses its corner point as the center of rotation</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 textbox object var textbox = new fabric.Textbox("Peace begins with a smile.", { backgroundColor: "#b0e0e6", width: 400, top: 70, left: 110, centeredRotation: false, angle: 15, }); // Add it to the canvas canvas.add(textbox); </script> </body> </html>
Example 2
Enabling centered rotation for the textbox
As we can see from this example, by setting the centeredRotation property as true, our textbox now uses its center as the center of rotation. Prior to version 1.3.4, centeredScaling and centeredRotation were enclosed within one single property called centerTransform.
<!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>Enabling centered rotation for the textbox</h2> <p>You can select and rotate the textbox to verify that it now uses its center as center of rotation</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 textbox object var textbox = new fabric.Textbox("Peace begins with a smile.", { backgroundColor: "#b0e0e6", width: 400, top: 70, left: 110, centeredRotation: true, angle: 15, }); // Add it to the canvas canvas.add(textbox); </script> </body> </html>
180 Views
