调整Fabric.js中的对象大小

Question

我打算使用Frabic.js来构建房间布局。它基于网格布局（网格大小：25），对象捕捉到位。

我正在尝试覆盖resize事件，使宽度为网格大小的倍数（25）。然而，它似乎随机调整元素大小。

代码

   var canvas = new fabric.Canvas('section', { selection: true }); fabric.Object.prototype.transparentCorners = false;
   var canvasWidth = 600;
   var canvasGrid = 25;

   canvas.on('object:modified', function(options) {
        options.target.set({opacity: 1}); // Return the opacity back to 1 after moving

        var newWidth = (Math.round(options.target.getWidth() / canvasGrid)) * canvasGrid;
        console.log("Width:" + options.target.getWidth());
        console.log("Desired width: " + newWidth);

        if(options.target.getWidth() !== newWidth) {
            console.log("alter the width");
            options.target.set({ width: newWidth });
            console.log("Width changed to: " + options.target.getWidth());
        }

        console.log("Final width: " + options.target.getWidth());
    });

最终用户即时添加对象，其代码如下。

    $("#addBlock").click(function(e){
        e.preventDefault();

        var block = new fabric.Rect({
            left: canvasGrid,
            top: canvasGrid,
            width: canvasGrid,
            height: canvasGrid,
            fill: 'rgb(127, 140, 141)',
            originX: 'left',
            originY: 'top',
            centeredRotation: false,
            lockScalingX: false,
            lockScalingY: false,
            lockRotation: false,
            hasControls: true,
            cornerSize: 8,
            hasBorders: false,
            padding: 0
        });

        canvas.add(block);
    });

控制台输出

Width:170
Desired width: 175
alter the width
Width changed to: 238.00000000000003
Final width: 238.00000000000003

所需宽度是我想要调整大小/块的大小，而不是它的最终宽度。