How to flip a Circle horizontally using FabricJS?

FabricJSJavascriptHTML5 Canvas

In this tutorial, we are going to learn how we can flip a Circle object horizontally using FabricJS. Circle is one of the various shapes provided by FabricJS. In order to create a circle, we have to create an instance of fabric.Circle class and add it to the canvas. We can flip a circle object horizontally using the flipX property.

Syntax

new fabric.Circle({ flipX: Boolean }: Object)

Parameters

  • options (optional) − This parameter is an Object which provides additional customizations to our circle. Using this parameter, properties such as colour, cursor, stroke width and a lot of other properties can be changed related to the object of which flipX is a property.

Options Keys

  • flipX − This property accepts a Boolean value. It allows us to flip an object horizontally.

Example 1

Passing flipX as key with a 'false' value

Let's see an example that shows us the default orientation of a circle object in FabricJS. Since we are passing the flipX property a "False" value, the circle object will not be flipped horizontally.

<!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>How to flip a Circle horizontally using FabricJS?</h2>
      <p>Here the circle has not flipped horizontally as we have set <b>flipX</b> as False. </p>
      <canvas id="canvas"></canvas>

      <script>
         // Initiate a canvas instance
         var canvas = new fabric.Canvas("canvas");
         var circle = new fabric.Circle({
            left: 215,
            top: 50,
            fill: "green",
            radius: 80,
            stroke: "#228b22",
            strokeWidth: 2,
            flipX: false
         });

         // Create gradient fill
         circle.set("fill", new fabric.Gradient({
            type: "linear",
            coords: {
               x1: 0,
               y1: 0,
               x2: 50,
               y2: 0
            },
            colorStops: [{
               offset: 0,
               color: "red"
            }, {
               offset: 1,
               color: "green"
            }, ],
         }));

         // Adding them to the canvas
         canvas.add(circle);
         canvas.setWidth(document.body.scrollWidth);
         canvas.setHeight(250);
      </script>
   </body>
</html>

Example 2

Passing the flipX property as key with a 'true' value

In this example, we have a circle object of radius 80px with a horizontal linear gradient fill. As we apply the flipX property to the circle object, it flips horizontally and thus we see that the gradient has flipped as well.

<!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>How to flip a Circle horizontally using FabricJS?</h2>
      <p>Here, notice that the circle has flipped horizontally (see the gradient) because we have set <b>flipX</b> as True. </p>
      <canvas id="canvas"></canvas>

      <script>
         // Initiate a canvas instance
         var canvas = new fabric.Canvas("canvas");
         var circle = new fabric.Circle({
            left: 215,
            top: 50,
            fill: "green",
            radius: 80,
            stroke: "#228b22",
            strokeWidth: 2,
            flipX: true
         });

         // Create gradient fill
         circle.set("fill", new fabric.Gradient({
            type: "linear",
            coords: {
               x1: 0,
               y1: 0,
               x2: 50,
               y2: 0
            },
            colorStops: [{
               offset: 0,
               color: "red"
            }, {
               offset: 1,
               color: "green"
            }, ],
         }));
   
         // Adding them to the canvas
         canvas.add(circle);
         canvas.setWidth(document.body.scrollWidth);
         canvas.setHeight(250);
      </script>
   </body>
</html>
raja
Updated on 25-May-2022 08:55:14

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