numerous bugfixes, partial progress with examples

docs/network/physics.html

@@ -90,7 +90,8 @@ var options = {
       centralGravity: 0.3,
       springLength: 95,
       springConstant: 0.04,
-      damping: 0.09
+      damping: 0.09,
+      avoidOverlap: false
     },
     forceAtlas2Based: {
       theta: 0.5,
@@ -98,14 +99,16 @@ var options = {
       centralGravity: 0.01,
       springConstant: 0.08,
       springLength: 100,
-      damping: 0.4
+      damping: 0.4,
+      avoidOverlap: false
     },
     repulsion: {
       centralGravity: 0.2,
       springLength: 200,
       springConstant: 0.05,
       nodeDistance: 100,
-      damping: 0.09
+      damping: 0.09,
+      avoidOverlap: false
     },
     hierarchicalRepulsion: {
       centralGravity: 0.0,
@@ -149,6 +152,7 @@ network.setOptions(options);
         <tr parent="barnesHut" class="hidden"><td class="indent">barnesHut.springLength</td>                 <td class="mid">Number</td>         <td class="mid"><code>95</code></td>        <td>The edges are modelled as springs. This springLength here is the the rest length of the spring.</td></tr>
         <tr parent="barnesHut" class="hidden"><td class="indent">barnesHut.springConstant</td>               <td class="mid">Number</td>         <td class="mid"><code>0.04</code></td>      <td>This is how 'sturdy' the springs are. Higher values mean stronger springs.</td></tr>
         <tr parent="barnesHut" class="hidden"><td class="indent">barnesHut.damping</td>                      <td class="mid">Number</td>         <td class="mid"><code>0.09</code></td>      <td>Accepted range: <code>[0 .. 1]</code>. The damping factor is how much of the velocity from the previous physics simulation iteration carries over to the next iteration.</td></tr>
+        <tr parent="barnesHut" class="hidden"><td class="indent">barnesHut.avoidOverlap</td>                 <td class="mid">Number</td>         <td class="mid"><code>0</code></td>         <td>Accepted range: <code>[0 .. 1]</code>. When larger than 0, the size of the node is taken into account. The distance will be calculated from the radius of the encompassing circle of the node for both the gravity model and the spring model. Value 1 is maximum overlap avoidance.</td></tr>
 
         <tr class='toggle collapsible' onclick="toggleTable('optionTable','forceAtlas2Based', this);"><td><span parent="forceAtlas2Based" class="right-caret"></span> forceAtlas2Based</td>    <td class="mid">Object</td>         <td class="mid"><code>Object</code></td>    <td>Force Atlas 2 has been developed by <a href="http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0098679" target="_blank">Jacomi <i>et al</i> (2014)</a> for use with Gephi. The forceAtlas2Based solver makes use of some of the equations provided
             by them and makes use of the barnesHut implementation in vis. The main differences are the central gravity model,
@@ -159,6 +163,7 @@ network.setOptions(options);
         <tr parent="forceAtlas2Based" class="hidden"><td class="indent">forceAtlas2Based.springLength</td>          <td class="mid">Number</td>         <td class="mid"><code>100</code></td>  <td>The edges are modelled as springs. This springLength here is the the rest length of the spring.</td></tr>
         <tr parent="forceAtlas2Based" class="hidden"><td class="indent">forceAtlas2Based.springConstant</td>        <td class="mid">Number</td>         <td class="mid"><code>0.08</code></td> <td>This is how 'sturdy' the springs are. Higher values mean stronger springs.</td></tr>
         <tr parent="forceAtlas2Based" class="hidden"><td class="indent">forceAtlas2Based.damping</td>               <td class="mid">Number</td>         <td class="mid"><code>0.4</code></td>  <td>Accepted range: <code>[0 .. 1]</code>. The damping factor is how much of the velocity from the previous physics simulation iteration carries over to the next iteration.</td></tr>
+        <tr parent="forceAtlas2Based" class="hidden"><td class="indent">forceAtlas2Based.avoidOverlap</td>          <td class="mid">Number</td>         <td class="mid"><code>0</code></td>    <td>Accepted range: <code>[0 .. 1]</code>. When larger than 0, the size of the node is taken into account. The distance will be calculated from the radius of the encompassing circle of the node for both the gravity model and the spring model. Value 1 is maximum overlap avoidance.</td></tr>
 
         <tr class='toggle collapsible' onclick="toggleTable('optionTable','repulsion', this);"><td><span parent="repulsion" class="right-caret"></span> repulsion</td>                              <td class="mid">Object</td>         <td class="mid"><code>Object</code></td>    <td>The repulsion model assumes nodes have a simplified repulsion field around them. It's force linearly decreases from 1 (at 0.5*nodeDistance and smaller) to 0 (at 2*nodeDistance).</td></tr>
         <tr parent="repulsion" class="hidden"><td class="indent">repulsion.nodeDistance</td>                 <td class="mid">Number</td>         <td class="mid"><code>100</code></td>       <td>This is the range of influence for the repulsion.</td></tr>
@@ -166,6 +171,7 @@ network.setOptions(options);
         <tr parent="repulsion" class="hidden"><td class="indent">repulsion.springLength</td>                 <td class="mid">Number</td>         <td class="mid"><code>200</code></td>       <td>The edges are modelled as springs. This springLength here is the the rest length of the spring.</td></tr>
         <tr parent="repulsion" class="hidden"><td class="indent">repulsion.springConstant</td>               <td class="mid">Number</td>         <td class="mid"><code>0.05</code></td>      <td>This is how 'sturdy' the springs are. Higher values mean stronger springs.</td></tr>
         <tr parent="repulsion" class="hidden"><td class="indent">repulsion.damping</td>                      <td class="mid">Number</td>         <td class="mid"><code>0.09</code></td>      <td>Accepted range: <code>[0 .. 1]</code>. The damping factor is how much of the velocity from the previous physics simulation iteration carries over to the next iteration.</td></tr>
+        <tr parent="repulsion" class="hidden"><td class="indent">repulsion.avoidOverlap</td>                 <td class="mid">Number</td>         <td class="mid"><code>0</code></td>         <td>Accepted range: <code>[0 .. 1]</code>. When larger than 0, the size of the node is taken into account. The distance will be calculated from the radius of the encompassing circle of the node for the spring model. Value 1 is maximum overlap avoidance.</td></tr>
 
         <tr class='toggle collapsible' onclick="toggleTable('optionTable','hierarchicalRepulsion', this);"><td><span parent="hierarchicalRepulsion" class="right-caret"></span> hierarchicalRepulsion</td>                  <td class="mid">Object</td>         <td class="mid"><code>Object</code></td>    <td>This model is based on the repulsion solver but the levels are taken into account and the forces are normalized.</td></tr>
         <tr parent="hierarchicalRepulsion" class="hidden"><td class="indent">hierarchicalRepulsion.nodeDistance</td>     <td class="mid">Number</td>         <td class="mid"><code>120</code></td>       <td>This is the range of influence for the repulsion.</td></tr>

examples/network/categories/02_random_nodes.html

@@ -14,8 +14,8 @@
     }
   </style>
 
-  <script type="text/javascript" src="../../dist/vis.js"></script>
-  <link href="../../dist/vis.css" rel="stylesheet" type="text/css" />
+  <script type="text/javascript" src="../../../dist/vis.js"></script>
+  <link href="../../../dist/vis.css" rel="stylesheet" type="text/css" />
 
   <script type="text/javascript">
     var nodes = null;
@@ -85,14 +85,14 @@
         edges: edges
       };
       var options = {
-        physics: { stabilization: false }
+        physics: { stabilization: true }
       };
       network = new vis.Network(container, data, options);
     }
 
 
   </script>
-  <script src="../googleAnalytics.js"></script>
+  <script src="../../googleAnalytics.js"></script>
 </head>
 <body onload="draw();">
 <p>

examples/network/categories/28_world_cup_network_performance.html

@@ -5,10 +5,10 @@
   <meta http-equiv="content-type" content="text/html; charset=UTF8">
   <title>Network | Static smooth curves - World Cup Network</title>
 
-  <script type="text/javascript" src="../../dist/vis.js"></script>
-  <link type="text/css" rel="stylesheet" href="../../dist/vis.css">
+  <script type="text/javascript" src="../../../dist/vis.js"></script>
+  <link type="text/css" rel="stylesheet" href="../../../dist/vis.css">
 
-  <script src="./data/WorldCup2014.js"></script>
+  <script src="../data/WorldCup2014.js"></script>
 
   <style type="text/css">
     #mynetwork {
@@ -45,6 +45,11 @@
   function redrawAll() {
     network = null;
 
+    for (var i = 0; i < nodes.length; i++) {
+      delete nodes[i].x;
+      delete nodes[i].y;
+    }
+
     // create a network
     var container = document.getElementById('mynetwork');
     var data = {
@@ -67,7 +72,6 @@
         width: 0.15,
         color: {inherit: 'from'},
         smooth: {
-          dynamic: false,
           type: 'continuous'
         }
       },

examples/network/categories/37_label_alignment.html → examples/network/categories/labels/label_alignment.html

@@ -3,22 +3,25 @@
 <head>
   <title>Network | Label alignment</title>
 
-  <script type="text/javascript" src="../../dist/vis.js"></script>
-  <link href="../../dist/vis.css" rel="stylesheet" type="text/css" />
+  <script type="text/javascript" src="../../../../dist/vis.js"></script>
+  <link href="../../../../dist/vis.css" rel="stylesheet" type="text/css" />
 
   <style type="text/css">
     #mynetwork {
-      width: 400px;
-      height: 400px;
+      width: 600px;
+      height: 600px;
       border: 1px solid lightgray;
     }
+    p {
+      max-width:600px;
+    }
   </style>
-  <script src="../googleAnalytics.js"></script>
+  <script src="../../../googleAnalytics.js"></script>
 </head>
 
 <body>
 
-<p>Labels can be aligned to edges in various ways.</p>
+<p>Labels of edges can be aligned to edges in various ways. <br>Label alignment for nodes (top, bottom, left, right, inside) is planned but not in vis yet.</p>
 
 <div id="mynetwork"></div>
 
@@ -34,10 +37,10 @@
 
   // create an array with edges
   var edges = [
-    {from: 1, to: 2, label: 'middle', font: {align:'middle', background:'orange'}},
-    {from: 1, to: 3, label: 'top', font: {align: 'top', background:'green'}},
-    {from: 2, to: 4, label: 'horizontal', font: {align: 'horizontal', background: 'red'}},
-    {from: 2, to: 5, label: 'bottom', font: { align:'bottom',  background: '#ccd' }}
+    {from: 1, to: 2, label: 'middle',     font: {align: 'middle'}},
+    {from: 1, to: 3, label: 'top',        font: {align: 'top'}},
+    {from: 2, to: 4, label: 'horizontal', font: {align: 'horizontal'}},
+    {from: 2, to: 5, label: 'bottom',     font: {align: 'bottom'}}
   ];
 
   // create a network
@@ -46,11 +49,7 @@
     nodes: nodes,
     edges: edges
   };
-  var options = {
-    edges: {
-      font: {stroke: 0}
-    }
-  };
+  var options = {};
   var network = new vis.Network(container, data, options);
 </script>
 

examples/network/categories/labels/label_background.html

@@ -0,0 +1,57 @@
+<!doctype html>
+<html>
+<head>
+  <title>Network | Label alignment</title>
+
+  <script type="text/javascript" src="../../../../dist/vis.js"></script>
+  <link href="../../../../dist/vis.css" rel="stylesheet" type="text/css" />
+
+  <style type="text/css">
+    #mynetwork {
+      width: 600px;
+      height: 600px;
+      border: 1px solid lightgray;
+    }
+    p {
+      max-width:600px;
+    }
+  </style>
+  <script src="../../../googleAnalytics.js"></script>
+</head>
+
+<body>
+
+<p>Labels can have any color background.</p>
+
+<div id="mynetwork"></div>
+
+<script type="text/javascript">
+  // create an array with nodes
+  var nodes = [
+    {id: 1, label: 'Node 1', font: {background: 'red'}},
+    {id: 2, label: 'Node 2', font: {background: 'white'}},
+    {id: 3, label: 'Node 3', font: {background: 'cyan'}},
+    {id: 4, label: 'Node 4', font: {background: 'lime'}},
+    {id: 5, label: 'Node 5', font: {background: 'pink'}}
+  ];
+
+  // create an array with edges
+  var edges = [
+    {from: 1, to: 2, label: 'label1', font: {background: '#ff0000'}},
+    {from: 1, to: 3, label: 'label2', font: {background: 'yellow'}},
+    {from: 2, to: 4, label: 'label3', font: {background: 'lime'}},
+    {from: 2, to: 5, label: 'label3', font: {background: 'pink'}}
+  ];
+
+  // create a network
+  var container = document.getElementById('mynetwork');
+  var data = {
+    nodes: nodes,
+    edges: edges
+  };
+  var options = {nodes:{font:{strokeWidth:0}}, edges:{font:{strokeWidth:0}}};
+  var network = new vis.Network(container, data, options);
+</script>
+
+</body>
+</html>

examples/network/categories/labels/label_color_and_size.html

@@ -0,0 +1,61 @@
+<!doctype html>
+<html>
+<head>
+  <title>Network | Label stroke</title>
+  <script type="text/javascript" src="../../../../dist/vis.js"></script>
+  <link href="../../../../dist/vis.css" rel="stylesheet" type="text/css" />
+
+  <style type="text/css">
+    #mynetwork {
+      width: 600px;
+      height: 600px;
+      border: 1px solid lightgray;
+      background:#d1d1d1;
+    }
+    p {
+      max-width:600px;
+    }
+  </style>
+  <script src="../../../googleAnalytics.js"></script>
+</head>
+
+<body>
+<p>The style of the edges can be fully customized.</p>
+
+<div id="mynetwork"></div>
+
+<script type="text/javascript">
+  // create an array with nodes
+  var nodes = [
+    {id: 1, label: 'Node 1', font: '12px arial red'},
+    {id: 2, label: 'Node 2', font: {size:12, color:'lime', face:'arial'}},
+    {id: 3, label: 'Node 3', font: '18px verdana blue'},
+    {id: 4, label: 'Node 4', font: {size:12, color:'red', face:'sans', background:'white'}},
+    {id: 5, label: 'Node 5', font: {size:15, color:'red', face:'courier', strokeWidth:3, strokeColor:'#ffffff'}}
+  ];
+
+  // create an array with edges
+  var edges = [
+    {from: 1, to: 2},
+    {from: 1, to: 3},
+    {from: 2, to: 4},
+    {from: 2, to: 5}
+  ];
+
+  // create a network
+  var container = document.getElementById('mynetwork');
+  var data = {
+    nodes: nodes,
+    edges: edges
+  };
+  var options = {
+    nodes : {
+      shape: 'dot',
+      size: 10
+    }
+  };
+  var network = new vis.Network(container, data, options);
+</script>
+
+</body>
+</html>

examples/network/categories/35_label_stroke.html → examples/network/categories/labels/label_stroke.html

@@ -2,23 +2,25 @@
 <html>
 <head>
   <title>Network | Label stroke</title>
-
-  <script type="text/javascript" src="../../dist/vis.js"></script>
-  <link href="../../dist/vis.css" rel="stylesheet" type="text/css" />
+  <script type="text/javascript" src="../../../../dist/vis.js"></script>
+  <link href="../../../../dist/vis.css" rel="stylesheet" type="text/css" />
 
   <style type="text/css">
     #mynetwork {
-      width: 400px;
-      height: 400px;
+      width: 600px;
+      height: 600px;
       border: 1px solid lightgray;
-      background: #d1d1d1;
+      background:#d1d1d1;
+    }
+    p {
+      max-width:600px;
     }
   </style>
-  <script src="../googleAnalytics.js"></script>
+  <script src="../../../googleAnalytics.js"></script>
 </head>
 
 <body>
-<p>The font, size, and stroke of labels is fully customizable.</p>
+<p>The stroke of labels is fully can have a width and color. Edgelabels by default have a white stroke for clarity.</p>
 
 <div id="mynetwork"></div>
 

examples/network/categories/nodeStyles/colors.html

@@ -12,6 +12,10 @@
       height: 400px;
       border: 1px solid lightgray;
     }
+
+    p {
+      max-width:700px;
+    }
   </style>
 </head>
 <body>
@@ -26,12 +30,12 @@
 <script type="text/javascript">
   // create an array with nodes
   var nodes = new vis.DataSet([
-    {id: 1, label:'html color', color: 'red'},
-    {id: 2, label:'rgb color', color: 'rgb(200,12,31)'},
-    {id: 3, label:'hex color', color: '#ff00dd'},
-    {id: 4, label:'rgba color', color: 'rgba(230,53,94,0.5)'},
-    {id: 5, label:'colorObject', color: {background:'red', border:'blue'}},
-    {id: 6, label:'colorObject + highlight', color: {background:'orange', border:'blue',highlight:{background:'red',border:'blue'}}},
+    {id: 1, label:'html color', color: 'lime'},
+    {id: 2, label:'rgb color', color: 'rgb(255,168,7)'},
+    {id: 3, label:'hex color', color: '#7BE141'},
+    {id: 4, label:'rgba color', color: 'rgba(97,195,238,0.5)'},
+    {id: 5, label:'colorObject', color: {background:'pink', border:'purple'}},
+    {id: 6, label:'colorObject + highlight', color: {background:'#F03967', border:'#713E7F',highlight:{background:'red',border:'black'}}},
     {id: 7, label:'colorObject + highlight + hover', color: {background:'cyan', border:'blue',highlight:{background:'red',border:'blue'},hover:{background:'white',border:'red'}}}
   ])
 
@@ -40,7 +44,9 @@
     {from: 1, to: 3},
     {from: 1, to: 2},
     {from: 2, to: 4},
-    {from: 2, to: 5}
+    {from: 2, to: 5},
+    {from: 2, to: 6},
+    {from: 4, to: 7},
   ]);
 
   // create a network
@@ -49,7 +55,7 @@
     nodes: nodes,
     edges: edges
   };
-  var options = {interaction:{hover:true}};
+  var options = {nodes:{borderWidth:2},interaction:{hover:true}};
   var network = new vis.Network(container, data, options);
 </script>
 

examples/network/categories/nodeStyles/icons.html

@@ -15,6 +15,12 @@
     #mynetworkFA,
     #mynetworkIO {
       height: 300px;
+      width: 700px;
+      border:1px solid lightgrey;
+    }
+
+    p {
+      max-width:700px;
     }
   </style>
 
@@ -170,13 +176,19 @@
   </script>
   <script src="../../../googleAnalytics.js"></script>
 </head>
-
 <body onload="draw()">
+<p>
+Icons can be used for nodes as well. This example shows Icons from fontAwesome and Ionicons but it should work with similar packages as well.
+  It uses unicode and css to define the icons.<br><br> <b>Remember! Unicode in javascript is done like this: \uf274 for the unicode f274.</b>
+  <br> If a node is shown as a rectangle, it means the css is not loaded (or not yet loaded). A redraw will fix that.
+
+</p>
+
 <h2>
-  <i class="fa fa-flag"></i> Use FontAwesome-icons for node</h2>
+  <i class="fa fa-flag"></i> Use FontAwesome-icons for nodes</h2>
 <div id="mynetworkFA"></div>
 <h2>
-  <i class="ion ion-ionic"></i> Use Ionicons-icons for node</h2>
+  <i class="ion ion-ionic"></i> Use Ionicons-icons for nodes</h2>
 <div id="mynetworkIO"></div>
 
 </body>

lib/network/Network.js

@@ -260,7 +260,7 @@ Network.prototype.bindEventListeners = function () {
   this.body.emitter.on("_dataChanged", () => {
     // update shortcut lists
     this._updateVisibleIndices();
-    this.physics.updatePhysicsIndices();
+    this.physics.updatePhysicsData();
 
     // call the dataUpdated event because the only difference between the two is the updating of the indices
     this.body.emitter.emit("_dataUpdated");

lib/network/modules/CanvasRenderer.js

@@ -36,6 +36,7 @@ class CanvasRenderer {
       this.dragging = true;
     });
     this.body.emitter.on("dragEnd", () => this.dragging = false);
+    this.body.emitter.on("_resizeNodes", () => this._resizeNodes());
     this.body.emitter.on("_redraw", () => {
       if (this.renderingActive === false) {
         this._redraw();
@@ -194,6 +195,43 @@ class CanvasRenderer {
   }
 
 
+  /**
+   * Redraw all nodes
+   * The 2d context of a HTML canvas can be retrieved by canvas.getContext('2d');
+   * @param {CanvasRenderingContext2D}   ctx
+   * @param {Boolean} [alwaysShow]
+   * @private
+   */
+  _resizeNodes() {
+    let ctx = this.canvas.frame.canvas.getContext('2d');
+    if (this.pixelRatio === undefined) {
+      this.pixelRatio = (window.devicePixelRatio || 1) / (ctx.webkitBackingStorePixelRatio ||
+        ctx.mozBackingStorePixelRatio ||
+        ctx.msBackingStorePixelRatio ||
+        ctx.oBackingStorePixelRatio ||
+        ctx.backingStorePixelRatio || 1);
+    }
+    ctx.setTransform(this.pixelRatio, 0, 0, this.pixelRatio, 0, 0);
+    ctx.save();
+    ctx.translate(this.body.view.translation.x, this.body.view.translation.y);
+    ctx.scale(this.body.view.scale, this.body.view.scale);
+
+    let nodes = this.body.nodes;
+    let node;
+
+    // resize all nodes
+    for (let nodeId in nodes) {
+      if (nodes.hasOwnProperty(nodeId)) {
+        node = nodes[nodeId];
+        node.resize(ctx);
+        node.updateBoundingBox(ctx);
+      }
+    }
+
+    // restore original scaling and translation
+    ctx.restore();
+  }
+
   /**
    * Redraw all nodes
    * The 2d context of a HTML canvas can be retrieved by canvas.getContext('2d');

lib/network/modules/LayoutEngine.js

@@ -134,7 +134,6 @@ class LayoutEngine {
         if ((!node.isFixed()) && (node.x === undefined || node.y === undefined)) {
           let radius = 10 * 0.1 * nodesArray.length + 10;
           let angle = 2 * Math.PI * this.seededRandom();
-
           if (node.options.fixed.x === false) {
             node.x = radius * Math.cos(angle);
           }

lib/network/modules/PhysicsEngine.js

@@ -35,7 +35,8 @@ class PhysicsEngine {
         centralGravity: 0.3,
         springLength: 95,
         springConstant: 0.04,
-        damping: 0.09
+        damping: 0.09,
+        avoidOverlap: 0
       },
       forceAtlas2Based: {
         theta: 0.5,
@@ -43,14 +44,16 @@ class PhysicsEngine {
         centralGravity: 0.01,
         springConstant: 0.08,
         springLength: 100,
-        damping: 0.4
+        damping: 0.4,
+        avoidOverlap: 0
       },
       repulsion: {
         centralGravity: 0.2,
         springLength: 200,
         springConstant: 0.05,
         nodeDistance: 100,
-        damping: 0.09
+        damping: 0.09,
+        avoidOverlap: 0
       },
       hierarchicalRepulsion: {
         centralGravity: 0.0,
@@ -159,7 +162,6 @@ class PhysicsEngine {
     else {
       this.ready = true;
       this.body.emitter.emit('fit');
-
     }
   }
 
@@ -169,6 +171,10 @@ class PhysicsEngine {
   startSimulation() {
     if (this.physicsEnabled === true) {
       this.stabilized = false;
+
+      // this sets the width of all nodes initially which could be required for the avoidOverlap
+      this.body.emitter.emit("_resizeNodes");
+
       if (this.viewFunction === undefined) {
         this.viewFunction = this.simulationStep.bind(this);
         this.body.emitter.on('initRedraw', this.viewFunction);
@@ -273,7 +279,7 @@ class PhysicsEngine {
    *
    * @private
    */
-  updatePhysicsIndices() {
+  updatePhysicsData() {
     this.physicsBody.forces = {};
     this.physicsBody.physicsNodeIndices = [];
     this.physicsBody.physicsEdgeIndices = [];
@@ -478,6 +484,9 @@ class PhysicsEngine {
       iterations = this.options.stabilization.iterations;
     }
 
+    // this sets the width of all nodes initially which could be required for the avoidOverlap
+    this.body.emitter.emit("_resizeNodes");
+
     // stop the render loop
     this.stopSimulation();
 

lib/network/modules/View.js

@@ -125,7 +125,7 @@ class View {
       zoomLevel *= factor;
     }
     else {
-      this.body.emitter.emit("_redraw", true);
+      this.body.emitter.emit("_resizeNodes");
       range = this._getRange(options.nodes);
       var xDistance = Math.abs(range.maxX - range.minX) * 1.1;
       var yDistance = Math.abs(range.maxY - range.minY) * 1.1;

lib/network/modules/components/Edge.js

@@ -90,7 +90,6 @@ class Edge {
   static parseOptions(parentOptions, newOptions, allowDeletion = false) {
     var fields = [
       'id',
-      'font',
       'from',
       'hidden',
       'hoverWidth',

lib/network/modules/components/Node.js

@@ -162,6 +162,7 @@ class Node {
   static parseOptions(parentOptions, newOptions, allowDeletion = false) {
     var fields = [
       'color',
+      'font',
       'fixed',
       'shadow'
     ];
@@ -194,6 +195,10 @@ class Node {
         }
       }
     }
+
+    if (newOptions.font !== undefined) {
+      Label.parseOptions(parentOptions.font, newOptions);
+    }
   }
 
   updateLabelModule() {
@@ -368,6 +373,7 @@ class Node {
     this.shape.draw(ctx, this.x, this.y, this.selected, this.hover);
   }
 
+
   /**
    * Update the bounding box of the shape
    */

lib/network/modules/components/nodes/shapes/Box.js

@@ -13,6 +13,7 @@ class Box extends NodeBase {
       let textSize = this.labelModule.getTextSize(ctx,selected);
       this.width = textSize.width + 2 * margin;
       this.height = textSize.height + 2 * margin;
+      this.radius = 0.5*this.width;
     }
   }
 

lib/network/modules/components/nodes/shapes/Circle.js

@@ -16,6 +16,7 @@ class Circle extends CircleImageBase {
 
       this.width = diameter;
       this.height = diameter;
+      this.radius = 0.5*this.width;
     }
   }
 

lib/network/modules/components/nodes/shapes/CircularImage.js

@@ -17,6 +17,7 @@ class CircularImage extends CircleImageBase {
         this.width = diameter;
         this.height = diameter;
         this._swapToImageResizeWhenImageLoaded = true;
+        this.radius = 0.5*this.width;
       }
     }
     else {

lib/network/modules/components/nodes/shapes/Database.js

@@ -14,6 +14,7 @@ class Database extends NodeBase {
       var size = textSize.width + 2 * margin;
       this.width = size;
       this.height = size;
+      this.radius = 0.5*this.width;
     }
   }
 

lib/network/modules/components/nodes/shapes/Ellipse.js

@@ -16,6 +16,7 @@ class Ellipse extends NodeBase {
       if (this.width < this.height) {
         this.width = this.height;
       }
+      this.radius = 0.5*this.width;
     }
   }
 

lib/network/modules/components/nodes/shapes/Empty.js

@@ -1,21 +0,0 @@
-'use strict';
-
-import NodeBase from '../util/NodeBase'
-
-class Empty extends NodeBase {
-  constructor (options, body, labelModule) {
-    super(options, body, labelModule);
-  }
-
-  setOptions() {}
-
-  resize() {}
-
-  draw() {}
-
-  distanceToBorder() {}
-
-  updateBoundingBox() {}}
-
-
-export default Empty;

lib/network/modules/components/nodes/shapes/Icon.js

@@ -16,6 +16,7 @@ class Icon extends NodeBase {
       };
       this.width = iconSize.width + 2 * margin;
       this.height = iconSize.height + 2 * margin;
+      this.radius = 0.5*this.width;
     }
   }
 

lib/network/modules/components/nodes/shapes/Text.js

@@ -13,6 +13,7 @@ class Text extends NodeBase {
       var textSize = this.labelModule.getTextSize(ctx,selected);
       this.width = textSize.width + 2 * margin;
       this.height = textSize.height + 2 * margin;
+      this.radius = 0.5*this.width;
     }
   }
 

lib/network/modules/components/nodes/util/CircleImageBase.js

@@ -25,6 +25,7 @@ class CircleImageBase extends NodeBase {
       }
       this.width = width;
       this.height = height;
+      this.radius = 0.5*this.width;
     }
   }
 

lib/network/modules/components/nodes/util/NodeBase.js

@@ -6,6 +6,8 @@ class NodeBase {
     this.top = undefined;
     this.left = undefined;
     this.height = undefined;
+    this.width = undefined;
+    this.radius = undefined;
     this.boundingBox = {top: 0, left: 0, right: 0, bottom: 0};
   }
 

lib/network/modules/components/nodes/util/ShapeBase.js

@@ -10,6 +10,7 @@ class ShapeBase extends NodeBase {
       var size = 2 * this.options.size;
       this.width = size;
       this.height = size;
+      this.radius = 0.5*this.width;
     }
   }
 

lib/network/modules/components/physics/BarnesHutSolver.js

@@ -9,7 +9,8 @@ class BarnesHutSolver {
 
   setOptions(options) {
     this.options = options;
-    this.thetaInversed = 1/ this.options.theta;
+    this.thetaInversed = 1 / this.options.theta;
+    this.overlapAvoidanceFactor = 1 - Math.max(0, Math.min(1,this.options.avoidOverlap)); // if 1 then min distance = 0.5, if 0.5 then min distance = 0.5 + 0.5*node.shape.radius
   }
 
 
@@ -104,6 +105,11 @@ class BarnesHutSolver {
       distance = 0.1 * Math.random();
       dx = distance;
     }
+
+    if (this.overlapAvoidanceFactor < 1) {
+      distance = Math.max(0.1 + (this.overlapAvoidanceFactor * node.shape.radius), distance - node.shape.radius);
+    }
+
     // the dividing by the distance cubed instead of squared allows us to get the fx and fy components without sines and cosines
     // it is shorthand for gravityforce with distance squared and fx = dx/distance * gravityForce
     let gravityForce = this.options.gravitationalConstant * parentBranch.mass * node.options.mass / Math.pow(distance,3);

lib/network/modules/components/physics/FA2BasedRepulsionSolver.js

@@ -20,6 +20,11 @@ class ForceAtlas2BasedRepulsionSolver extends BarnesHutSolver {
       distance = 0.1 * Math.random();
       dx = distance;
     }
+
+    if (this.overlapAvoidanceFactor < 1) {
+      distance = Math.max(0.1 + (this.overlapAvoidanceFactor * node.shape.radius), distance - node.shape.radius);
+    }
+
     let degree = (node.edges.length + 1);
     // the dividing by the distance cubed instead of squared allows us to get the fx and fy components without sines and cosines
     // it is shorthand for gravityforce with distance squared and fx = dx/distance * gravityForce

lib/network/modules/components/physics/SpringSolver.js

@@ -7,6 +7,8 @@ class SpringSolver {
 
   setOptions(options) {
     this.options = options;
+    this.overlapAvoidanceFactor = 1 - Math.max(0, Math.min(1,this.options.avoidOverlap)); // if 1 then min distance = 0.5, if 0.5 then min distance = 0.5 + 0.5*node.shape.radius
+
   }
 
   /**
@@ -56,8 +58,17 @@ class SpringSolver {
    * @private
    */
   _calculateSpringForce(node1, node2, edgeLength) {
-    let dx = (node1.x - node2.x);
-    let dy = (node1.y - node2.y);
+    let dx,dy;
+    if (this.overlapAvoidanceFactor < 1) {
+      let nodesWidth = this.overlapAvoidanceFactor * (node1.shape.radius + node2.shape.radius);
+      dx = (node1.x - node2.x) - nodesWidth;
+      dy = (node1.y - node2.y) - nodesWidth;
+    }
+    else {
+      dx = (node1.x - node2.x);
+      dy = (node1.y - node2.y);
+    }
+
     let distance = Math.sqrt(dx * dx + dy * dy);
     distance = distance === 0 ? 0.01 : distance;
 

lib/network/modules/components/shared/Label.js

@@ -92,7 +92,7 @@ class Label {
           ctx.fillRect(-this.size.width * 0.5, lineMargin, this.size.width, this.size.height);
           break;
         default:
-          ctx.fillRect(this.size.left, this.size.top, this.size.width, this.size.height);
+          ctx.fillRect(this.size.left, this.size.top - 0.5*lineMargin, this.size.width, this.size.height);
           break;
       }
     }

lib/network/options.js

@@ -220,6 +220,7 @@ let allOptions = {
       springLength: {number},
       springConstant: {number},
       damping: {number},
+      avoidOverlap: {number},
       __type__: {object}
     },
     forceAtlas2Based: {
@@ -228,6 +229,7 @@ let allOptions = {
       springLength: {number},
       springConstant: {number},
       damping: {number},
+      avoidOverlap: {number},
       __type__: {object}
     },
     repulsion: {
@@ -236,6 +238,7 @@ let allOptions = {
       springConstant: {number},
       nodeDistance: {number},
       damping: {number},
+      avoidOverlap: {number},
       __type__: {object}
     },
     hierarchicalRepulsion: {
@@ -426,7 +429,8 @@ let configureOptions = {
       centralGravity: [0.3, 0, 10, 0.05],
       springLength: [95, 0, 500, 5],
       springConstant: [0.04, 0, 5, 0.005],
-      damping: [0.09, 0, 1, 0.01]
+      damping: [0.09, 0, 1, 0.01],
+      avoidOverlap: [0, 0, 1, 0.01]
     },
     forceAtlas2Based: {
       //theta: [0.5, 0.1, 1, 0.05],
@@ -434,14 +438,16 @@ let configureOptions = {
       centralGravity: [0.01, 0, 1, 0.005],
       springLength: [95, 0, 500, 5],
       springConstant: [0.08, 0, 5, 0.005],
-      damping: [0.4, 0, 1, 0.01]
+      damping: [0.4, 0, 1, 0.01],
+      avoidOverlap: [0, 0, 1, 0.01]
     },
     repulsion: {
       centralGravity: [0.2, 0, 10, 0.05],
       springLength: [200, 0, 500, 5],
       springConstant: [0.05, 0, 5, 0.005],
       nodeDistance: [100, 0, 500, 5],
-      damping: [0.09, 0, 1, 0.01]
+      damping: [0.09, 0, 1, 0.01],
+      avoidOverlap: [0, 0, 1, 0.01]
     },
     hierarchicalRepulsion: {
       centralGravity: [0.2, 0, 10, 0.05],

test/timeline_groups.html

@@ -64,7 +64,7 @@
   var names = ['John (0)', 'Alston (1)', 'Lee (2)', 'Grant (3)'];
   var groups = new vis.DataSet();
   for (var g = 0; g < groupCount; g++) {
-    groups.add({id: g, content: names[g], title: 'Title of group ' + g, 'className': 'myGroup'});
+    groups.add({id: g, content: '<a href="http://google.com"><span style="color:#97B0F8;">' + names[g] + '</a>', title: 'Title of group ' + g, 'className': 'myGroup'});
   }
 
   // create a dataset with items
@@ -77,7 +77,7 @@
       id: i,
       group: group,
       content: 'item ' + i +
-          ' <span style="color:#97B0F8;">(' + names[group] + ')</span>',
+          ' <a href="http://google.com"><span style="color:#97B0F8;">(' + names[group] + ')</span></a> ',
       start: start,
       end: end,
       title: 'Title for item ' + i,