Draggable Element Label Inside

by Roman Bruckner

HTML

<html>
<head>
    <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/jointjs/3.3.0/joint.css" />
</head>
<body>
      <!-- content -->
      <div id="paper"></div>

      <!-- dependencies -->
        <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.20/lodash.min.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.4.0/backbone.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/jointjs/3.3.0/joint.js"></script>
    
    </body>
</html>

JavaScript

var GAP = 10;

var graph = new joint.dia.Graph;
var paper = new joint.dia.Paper({
  el: document.getElementById('paper'),
  width: 450,
  height: 300,
  model: graph,
  async: true,
  sorting: joint.dia.Paper.sorting.NONE,
  restrictTranslate: function(elementView, x0, y0) {
    var element = elementView.model;
    if (!element.get('label')) return;
    var parent = element.getParentCell();
    if (!parent) return;
		return parent.getBBox();
  }
});

var rect = new joint.shapes.standard.Rectangle({
  size: {
    width: 100,
    height: 100
  },
  position: {
    x: 100,
    y: 100
  }
});

var label = new joint.shapes.standard.Rectangle({
  label: true,
  size: {
    width: 40,
    height: 30
  },
  position: {
    x: 130,
    y: 130
  },
  attrs: {
    label: {
      text: 'Label',
      pointerEvents: 'all'
    },
    body: {
      pointerEvents: 'none',
      opacity: 0
    }
  }
});

graph.addCells([rect, label]);
rect.embed(label);