Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
How to set the position of an Ellipse from left using FabricJS?
In this tutorial, we are going to learn how to set the position of an Ellipse from the left using FabricJS. Ellipse is one of the various shapes provided by FabricJS. In order to create an ellipse, we will create an instance of fabric.Ellipse class and add it to the canvas. We can manipulate an ellipse object by changing its position, opacity, stroke and also its dimension. The position from left can be changed by using the left property.
Syntax
new fabric.Ellipse( { left: Number }: Object)
Parameters
-
options (optional) ? This parameter is an Object which provides additional customizations to our ellipse. Using this parameter color, cursor, stroke width and a lot of other properties can be changed related to the object of which left is a property.
Options Keys
-
left ? This property accepts a Number which sets the left position of an object. The value determines how far from left the object will be placed.
Example 1: Default Placement
Let's see an example to understand the default placement of an ellipse object in the canvas when its position has not been changed.
<!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>Setting the position of an Ellipse from left using FabricJS</h2>
<p>This is the default position, as we have not used the <b>left</b> property. </p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
// Initiate an ellipse instance
var ellipse = new fabric.Ellipse({
fill: "white",
rx: 80,
ry: 50,
stroke: "black",
strokeWidth: 5,
});
// Adding it to the canvas
canvas.add(ellipse);
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
</script>
</body>
</html>
Example 2: Using left Property
In this example, we are assigning the left property with a custom value. Since it accepts a Number, you must assign it a numerical value which will represent its position from the left.
<!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 set the position of Ellipse from left using FabricJS?</h2>
<p>Notice that the ellipse is placed 135px away from the left, since we have used the <b>left</b> property with a custom value.</p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
// Initiate an ellipse instance
var ellipse = new fabric.Ellipse({
left: 135,
fill: "white",
rx: 80,
ry: 50,
stroke: "black",
strokeWidth: 5,
});
// Adding it to the canvas
canvas.add(ellipse);
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
</script>
</body>
</html>
Key Points
- The left property accepts a numerical value representing pixels from the left edge
- If no left value is specified, the ellipse uses the default positioning
- Higher values move the ellipse further to the right on the canvas
- This property can be combined with other positioning properties like top for precise placement
Conclusion
The left property in FabricJS provides precise control over horizontal positioning of ellipse objects. By setting numerical values, you can position ellipses exactly where needed on your canvas.
261 Views
