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147 lines
3.7 KiB
147 lines
3.7 KiB
<!doctype html>
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<html>
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<head>
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<title>Graph | Random nodes</title>
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<style type="text/css">
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body {
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font: 10pt sans;
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}
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#mygraph {
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width: 600px;
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height: 600px;
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border: 1px solid lightgray;
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}
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</style>
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<script type="text/javascript" src="../../dist/vis.js"></script>
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<script type="text/javascript">
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var nodes = null;
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var edges = null;
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var graph = null;
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function draw() {
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nodes = [];
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edges = [];
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var connectionCount = [];
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// randomly create some nodes and edges
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var nodeCount = document.getElementById('nodeCount').value;
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for (var i = 0; i < nodeCount; i++) {
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nodes.push({
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id: i,
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label: String(i)
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});
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connectionCount[i] = 0;
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// create edges in a scale-free-graph way
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if (i == 1) {
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var from = i;
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var to = 0;
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edges.push({
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from: from,
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to: to
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});
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connectionCount[from]++;
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connectionCount[to]++;
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}
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else if (i > 1) {
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var conn = edges.length * 2;
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var rand = Math.floor(Math.random() * conn);
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var cum = 0;
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var j = 0;
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while (j < connectionCount.length && cum < rand) {
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cum += connectionCount[j];
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j++;
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}
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var from = i;
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var to = j;
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edges.push({
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from: from,
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to: to
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});
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connectionCount[from]++;
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connectionCount[to]++;
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}
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}
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// create a graph
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var container = document.getElementById('mygraph');
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var data = {
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nodes: nodes,
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edges: edges
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};
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var directionInput = document.getElementById("direction");
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var options = {
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edges: {
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},
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stabilize: false,
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hierarchicalLayout: {
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direction: directionInput.value
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}
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};
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graph = new vis.Graph(container, data, options);
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// add event listeners
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graph.on('select', function(params) {
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document.getElementById('selection').innerHTML = 'Selection: ' + params.nodes;
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});
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}
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</script>
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</head>
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<body onload="draw();">
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<h2>Hierarchical Layout - Scale-Free-Graph</h2>
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<div style="width:700px; font-size:14px;">
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This example shows the randomly generated <b>scale-free-graph</b> set of nodes and connected edges from example 2.
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In this example, hierarchical layout has been enabled and the vertical levels are determined automatically.
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</div>
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<br />
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<form onsubmit="draw(); return false;">
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<label for="nodeCount">Number of nodes:</label>
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<input id="nodeCount" type="text" value="25" style="width: 50px;">
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<input type="submit" value="Go">
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</form>
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<input type="button" id="btn-UD" value="Up-Down">
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<input type="button" id="btn-DU" value="Down-Up">
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<input type="button" id="btn-LR" value="Left-Right">
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<input type="button" id="btn-RL" value="Right-Left">
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<input type="hidden" id='direction' value="UD">
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<script language="javascript">
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var directionInput = document.getElementById("direction");
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var btnUD = document.getElementById("btn-UD");
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btnUD.onclick = function() {
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directionInput.value = "UD";
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draw();
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}
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var btnDU = document.getElementById("btn-DU");
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btnDU.onclick = function() {
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directionInput.value = "DU";
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draw();
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};
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var btnLR = document.getElementById("btn-LR");
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btnLR.onclick = function() {
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directionInput.value = "LR";
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draw();
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};
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var btnRL = document.getElementById("btn-RL");
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btnRL.onclick = function() {
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directionInput.value = "RL";
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draw();
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};
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</script>
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<br>
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<div id="mygraph"></div>
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<p id="selection"></p>
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</body>
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</html>
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