如何使用 FabricJS 在縮放圓形時鎖定翻轉?
在本教程中,我們將學習如何使用 FabricJS 在縮放圓形時鎖定翻轉。就像我們可以在畫布上指定圓形物件的
語法
new fabric.Circle({ lockScalingFlip : Boolean }: Object)
引數
options (可選) − 此引數是一個 物件,它為我們的圓形提供了額外的自定義。使用此引數,可以更改與
選項鍵
lockScalingFlip − 此屬性接受一個 布林值。如果我們將其賦值為“true”,則在縮放期間將不允許物件翻轉。
示例 1
畫布中圓形物件的預設行為
讓我們看一個例子來了解當不使用 lockScalingFlip 屬性時圓形物件的預設行為。
<!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 lock the flipping during scaling of circle using FabricJS</h2> <p>Select the circle and try to scale it up or down. You will notice that the circle flips while scaling. This is the default behavior. Here we haven't used the <b>lockScalingFlip</b> property but by default it is set to False.</p> <canvas id="canvas"></canvas> <script> // Initiate a canvas instance var canvas = new fabric.Canvas("canvas"); var circle = new fabric.Circle({ left: 115, top: 50, fill: "white", radius: 50, stroke: "black", strokeWidth: 5, }); // Adding it to the canvas canvas.add(circle); canvas.setWidth(document.body.scrollWidth); canvas.setHeight(250); </script> </body> </html>
示例 2
將 lockScalingFlip 作為鍵傳遞,值為“true”
在此示例中,我們將看到如何透過使用 lockScalingFlip 屬性來停止圓形物件在縮放時翻轉的能力。
<!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 lock the flipping during scaling of circle using FabricJS</h2> <p>Select the object and try to scale it up or down. Observe that the circle will no longer flip during scaling, as we have set <b>lockScalingFlip</b> to True. </p> <canvas id="canvas"></canvas> <script> // Initiate a canvas instance var canvas = new fabric.Canvas("canvas"); var circle = new fabric.Circle({ left: 115, top: 50, fill: "white", radius: 50, stroke: "black", strokeWidth: 5, lockScalingFlip: true }); // Adding it to the canvas canvas.add(circle); canvas.setWidth(document.body.scrollWidth); canvas.setHeight(250); </script> </body> </html>
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