How to set the position of a triangle from top using FabricJS?-JS Tutorial-php.cn

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How to set the position of a triangle from top using FabricJS?

Sep 17, 2023 pm 04:25 PM

如何使用 FabricJS 设置三角形从顶部的位置？

<p>In this tutorial, we will set the position of a triangle using FabricJS. The <em>top</em> property allows us to manipulate the position of an object. By default, the top position is relative to the object's top.</p><h2>Syntax</h2><pre class="just-code notranslate language-javascript" data-lang="javascript"> new Fabric.Triangle({ top: Number }: Object)< /pre><h2>Parameters</h2><ul class="list"><li><p><strong> Options</strong><strong> (Optional)</strongphpcngtphp cn - This parameter is an <em>Object</em> which provides additional customization to our triangle. Using this parameter, you can change the color, cursor, stroke width and other properties related to the object with <em>top</em> as the attribute. </p></li></ul><h2>Options Keys</h2phpcngt phpcn<ul Class= list"><li><p><strong>top</strong> - This property accepts a <strong>Number</strong> which allows us to set the distance of the triangle from the top of the canvas.</p></li> </ul><h2>Example 1</h2> <p><strong>Default appearance of triangle objects</strong></p><p>Let’s look at a code example to see how our triangle objects appear when the top property is not used.</ p><pre class="demo-code notranslate language-javascript" data-lang="javascript"><!DOCTYPE html> <html> <head>  <script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script> </head> <body> <h2> Default appearance of triangle objects</h2> <p> The default appearance of the triangle can be seen when the <b>top</b> attribute is not used. </p> <canvas id="canvas"></canvas> <script> //Start the canvas instance var canvas = new Fabric.Canvas("canvas"); canvas.setWidth(document.body.scrollWidth); Canvas.setHeight(250); //Initialize a triangle object var triangle = new Fabric.Triangle({ Left: 105, Width: 90, Height: 80, Fill in: "#ffc1cc", Stroke: "#fbaed2", Stroke width: 5, }); //Add it to the canvas canvas.add(triangle); </script> </body> </html></pre><h2>Example 2</h2><p><strong>Passing the <em>top</em> attribute as a key using a custom value</strongphpcngt phpcn</p><p> In this example, we pass the <em>top</em> attribute as the key with a value of 70. This means our triangle object will be placed 70px from the top. </p><pre class="demo-code notranslate language-javascript" data-lang="javascript"><!DOCTYPE html> <html> <head>  <script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script> </head> <body> <h2>Pass the top attribute as a key with a custom value</h2> <p>You can see that the triangle object is placed 70px from the top</p> <canvas id="canvas"></canvas> <script> //Start the canvas instance var canvas = new Fabric.Canvas("canvas"); canvas.setWidth(document.body.scrollWidth); Canvas.setHeight(250); //Initialize a triangle object var triangle = new Fabric.Triangle({ Left: 105, Top: 70, Width: 90, Height: 80, Fill in: "#ffc1cc", Stroke: "#fbaed2", Stroke width: 5, }); //Add it to the canvas canvas.add(triangle); </script> </body> </html></pre>

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