对Fabric.js对象进行分组和取消分组 [英] Grouping and Ungrouping Fabric.js objects

问题描述

我使用fabric.js创建了一种多边形选择器或多边形制作器。每次单击创建多边形的一个角，可以选择，移动等...双击原始点关闭多边形。在这一点上，我采取组成多边形的所有圆/线，并将它们分组。

I've created a kind of 'polygon selector' or 'polygon maker' using fabric.js. Each click creates a corner of the polygon, which can be selected, moved, etc... double clicking the original point 'closes' the polygon. At this point I take all of the circles/lines that make up the polygons and group them. So far so good.

当双击此类组时，我想取消组合并还原为可移动节点（即移动圆圈重塑多边形等）。但有一些奇怪的事情 - 看看当你移动圈子，某些线似乎'没有加入到圈子...

When such a group is double clicked, I would like it to ungroup and revert to movable nodes (i.e. moving the circles reshapes the polygon etc); but there's some strangeness going on - check out what happens when you move the circles, certain lines seem 'not joined' to the circles...

我已经审查每个组/ ungroup相关fabric.js线程（这里/ there / everywhere）。没有似乎涵盖了我在这里的连接对象的类型。

I've already reviewed every group/ungroup related fabric.js thread (here/there/everywhere). None seem to cover the type of 'connected' objects I have here.

这个小提琴我放在一起，显示问题说，它比我可以： http://jsfiddle.net/bhilleli/4v8mkw6q/

The fiddle I put together to show the problem says it better than I can: http://jsfiddle.net/bhilleli/4v8mkw6q/

代码的破碎位是@：

       //dbl clicked a group so lets ungroup it!
        items = p._objects; // grab the items from the group you want to

        // translate the group-relative coordinates to canvas relative ones
        p._restoreObjectsState();
        // remove the original group and add all items back to the canvas
        canvas.remove(p);
        for (var i = items.length - 1; i >= 0; i--) {
            canvas.add(items[i]);
        }
        canvas.renderAll();

推荐答案

您可以使用面料分组工具

you can use fabric grouping tool

您可以将对象分组和取消组合在一起，并在
同时操作

You can group and ungroup objects together, and manipulate them at the same time

例如

 var canvas = new fabric.Canvas('paper',{
    isDrawingMode: true
    });
$("#select").click(function(){
    canvas.isDrawingMode = false;
});
$("#draw").click(function(){
    canvas.isDrawingMode = true;
});

$("#group").on('click', function() {
    var activegroup = canvas.getActiveGroup();
    var objectsInGroup = activegroup.getObjects();

    activegroup.clone(function(newgroup) {
        canvas.discardActiveGroup();
        objectsInGroup.forEach(function(object) {
            canvas.remove(object);  
        });
        canvas.add(newgroup);

    });
});

$("#ungroup").click(function(){
   var activeObject = canvas.getActiveObject();
    if(activeObject.type=="group"){
        var items = activeObject._objects;
        alert(items);
        activeObject._restoreObjectsState();
        canvas.remove(activeObject);
        for(var i = 0; i < items.length; i++) {
          canvas.add(items[i]);
          canvas.item(canvas.size()-1).hasControls = true;
        }

        canvas.renderAll();
    }
});

请检查以下链接

在此输入链接说明

这篇关于对Fabric.js对象进行分组和取消分组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！