Can we export a JsPlumb flowchart as a JSON or XML?
I have created a JSPlumb Flowchart. Now, I want to export this flowchart into its corresponding JSON or XML script to save and perform various operations. What is more compatible ? Either of them is perfectly fine. Please enlighten me on this. The JsPlumb code that I developed (with the help of various sites) is as given below.
<html>
<head>
<title>Example</title>
<script type="text/javascript" src="Jquery\jq.js"></script>
<script type="text/javascript" src="Jquery\jq-ui.min.js"></script>
<script type="text/javascript" src="jsPlumb-master\build\demo\js\jquery.jsPlumb-1.4.1-all-min.js"></script>
</head>
<body>
<div id="main">
<div id="block1" class="node">node 0</div>
<div id="block2" class="node">node 1</div>
<div id="block3" class="node">node 2</div>
<div id="block4" class="node">node 3</div>
</div>
<script type="text/javascript">
var targetOption = {anchor:"TopCenter",
maxConnections:-1,
isSource:false,
isTarget:true,
endpoint:["Dot", {radius:8}],
paintStyle:{fillStyle:"#66FF00"},
setDragAllowedWhenFull:true}
var sourceOption = {anchor:"BottomCenter",
maxConnections:-1,
isSource:true,
isTarget:false,
endpoint:["Dot", {radius:8}],
paintStyle:{fillStyle:"#FFEF00"},
setDragAllowedWhenFull:true}
jsPlumb.bind("ready", function() {
jsPlumb.addEndpoint('block1', targetOption);
jsPlumb.addEndpoint('block1', sourceOption);
jsPlumb.addEndpoint('block2', targetOption);
jsPlumb.addEndpoint('block2', sourceOption);
jsPlumb.addEndpoint('block3', targetOption);
jsPlumb.addEndpoint('block3', sourceOption);
jsPlumb.addEndpoint('block4', targetOption);
jsPlumb.addEndpoint('block4', sourceOption);
jsPlumb.draggable('block1');
jsPlumb.draggable('block2');
jsPlumb.draggable('block3');
jsPlumb.draggable('block4');
});
</script>
<style type="text/css">
.node {
border:1px solid black;
position:absolute;
width:5em;
height:5em;
padding: 0.5em;
z-index:1;
border-radius:0.5em;
box-shadow: 2px 2px 19px #aaa;
background: white;
}
#node0 { top:10em; left:22em;}
#node1 { top:15em; left:32em;}
</style>
</body>
</html>
Thanks a lot in advance.
Answer
To export jsPlumb flowchart to JSON / XML firstly you would need to collect information about flowchart elements, then serialize it.
Enumerating Blocks
To get information about blocks you can use plain jQuery:
var blocks = []
$("#main .node").each(function (idx, elem) {
var $elem = $(elem);
blocks.push({
blockId: $elem.attr('id'),
positionX: parseInt($elem.css("left"), 10),
positionY: parseInt($elem.css("top"), 10)
});
});
Enumerating Connections
To get information about connections between elements you can use jsPlumb API, particularly "jsPlumb.getConnections()" method:
var connections = [];
$.each(jsPlumb.getConnections(), function (idx, connection) {
connections.push({
connectionId: connection.id,
pageSourceId: connection.sourceId,
pageTargetId: connection.targetId
});
});
Serializing to JSON
Once you collected all flowchart data you can serialize it to JSON:
var serializedData = JSON.stringify(blocks);