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Select All The Objects On Canvas Using Fabric Js

Ever found yourself in a situation where you needed to quickly select multiple objects on a canvas while working with Fabric.js? Don't worry; we've got you covered! In this guide, we'll walk you through the simple steps to select all the objects on canvas using Fabric.js.

First things first, Fabric.js is a powerful JavaScript library that provides interactive object model on an HTML5 canvas. It's a versatile tool for creating dynamic graphics and visualizations on the web.

To select all the objects on the canvas using Fabric.js, you can follow these straightforward steps:

Step 1: Accessing the Canvas
Make sure you have included the Fabric.js library in your project. Create a new canvas element in your HTML file and set its id attribute to a unique value for easy identification.

Html

Next, you need to initialize the Fabric canvas in your JavaScript code by referencing the canvas element.

Javascript

var canvas = new fabric.Canvas('myCanvas');

Step 2: Adding Objects to the Canvas
Now that you have your canvas set up, you can add various objects like shapes, images, text, etc., to the canvas. For demonstration purposes, let's add a couple of objects to the canvas:

Javascript

// Add a rectangle to the canvas
var rect = new fabric.Rect({
  left: 100,
  top: 100,
  width: 50,
  height: 50,
  fill: 'red'
});
canvas.add(rect);

// Add a circle to the canvas
var circle = new fabric.Circle({
  left: 200,
  top: 200,
  radius: 25,
  fill: 'blue'
});
canvas.add(circle);

Step 3: Selecting All Objects
To select all the objects on the canvas, you can use the `selectAll()` method provided by Fabric.js. This method will create a selection box that encompasses all the objects on the canvas.

Javascript

canvas.on('mouse:down', function (event) {
  var pointer = canvas.getPointer(event.e);
  var objects = canvas.getObjects();
  
  for (var i = 0; i < objects.length; i++) {
    if (objects[i].containsPoint(pointer)) {
      objects[i].set({selected: true});
    } else {
      objects[i].set({selected: false});
    }
  }
  canvas.renderAll();
});

By using the `mouse:down` event listener and iterating through all the objects on the canvas, you can select or deselect them based on their position concerning the pointer's location.

And there you have it! You've successfully selected all the objects on the canvas using Fabric.js. Feel free to experiment with more advanced features and functionalities offered by Fabric.js to enhance your canvas projects. Happy coding!

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