Fabric js：对所有对象进行分组

Question

是否可以在fabric js中，在单击事件时将画布上存在的所有对象分组

Answer 1

是的，可以在单击事件时对所有画布对象进行分组。下面我将向您展示一个示例，该示例创建三个对象并在单击时将它们分组。

var canvas = new fabric.Canvas('c');
canvas.backgroundColor = 'yellow';

//create circle object
 var circle = new fabric.Circle({
                  radius: 20, 
                  fill: 'red', 
                  left: 100, 
                  top: 100
                });
            canvas.add(circle);


//create square object
var square = new fabric.Rect({
              left: 130, 
              top: 140,
              fill: 'green',
              width: 40,
              height: 80
            });
            canvas.add(square);

canvas.renderAll();


$('#groupthem').on('click', function(event) {
    groupthem();
 });


var site_url =  'http://fabricjs.com/assets/1.svg';

fabric.loadSVGFromURL(site_url, function(objects) { 
          var group = new fabric.PathGroup(objects, { 
          left: 165, 
          top: 100, 
          width: 295, 
          height: 211 
        }); 
        canvas.add(group); 
        canvas.renderAll(); 
          }); 


function groupthem (){

    var objs = [];
    //get all the objects into an array
    objs = canvas._objects.filter(function(obj){
        return obj;
    });

    //group all the objects 
     var alltogetherObj = new fabric.Group(objs,{
                top:200,left:250,
                originX:'center',
                originY:'center'});


    //clear previous objects
    canvas._objects.forEach(function(obj){
        obj.remove();
    });

    canvas.add(alltogetherObj);
    alltogether.setCoords(); 
    canvas.renderAll();
}

现场 jsfiddle：http : //jsfiddle.net/tornado1979/y6fqj8go/

希望有帮助，祝你好运。

新更新的小提琴手链接：http : //jsfiddle.net/yogeshwari/sezxhqc4/1/