在本教程中,我们将使用FabricJS来设置Circle的控制角的颜色。当对象处于活动状态时,cornerColor属性允许我们操纵控制角的颜色。
new fabric.Circle({ cornerColor: String }: Object)
options(可选) - 此参数是一个对象,提供了对圆形进行其他自定义的选项。使用此参数,可以更改与cornerColor属性相关的对象的颜色、光标、描边宽度和许多其他属性。
cornerColor - 此属性接受一个字符串,允许我们为选定对象的控制角分配一种颜色。
将cornerColor作为键,并使用颜色名称作为值传递
让我们通过使用cornerColor属性来改变颜色的示例。在这种情况下,我们将值“black”分配给键,使控制角显示为黑色。
<!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 colour of controlling corners of circle using FabricJS</h2> <p>Select the object and notice the color of its controlling corners. Here we have used the <b>cornerColor</b> property to set the corners black. </p> <canvas id="canvas"></canvas> <script> // Initiate a canvas instance var canvas = new fabric.Canvas("canvas"); var cir = new fabric.Circle({ left: 215, top: 100, fill: "white", radius: 50, stroke: "#c154c1", strokeWidth: 5, borderColor: "#daa520", cornerColor: "black" }); // Adding it to the canvas canvas.add(cir); canvas.setWidth(document.body.scrollWidth); canvas.setHeight(250); </script> </body> </html>
将RGBA值分配给cornerColor属性
我们可以将RGBA值分配给键的字符串值,而不仅仅是传递一个简单的颜色名称。RGBA代表红、绿、蓝和透明度(alpha)。让我们看一个示例,了解如何实现这一点−
<!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 colour of controlling corners of circle using FabricJS</h2> <p>Select the object and notice the color of its controlling corners. Here we have used the <b>cornerColor</b> and assigned it an "rgba" value to set the corners purple. </p> <canvas id="canvas"></canvas> <script> // Initiate a canvas instance var canvas = new fabric.Canvas("canvas"); var cir = new fabric.Circle({ left: 215, top: 100, fill: "white", radius: 50, stroke: "#c154c1", strokeWidth: 5, borderColor: "#daa520", cornerColor: "rgb(255,20,147)" }); // Adding it to the canvas canvas.add(cir); canvas.setWidth(document.body.scrollWidth); canvas.setHeight(250); </script> </body> </html>
以上是如何使用FabricJS设置圆形控制角的颜色?的详细内容。更多信息请关注PHP中文网其他相关文章!