This is the code sample that I am using in reactjs.
const node = graph.$(`#${selectedNode.id()}`);
graph.remove(node);
selectedNode.id is the id of the parent node but it deletes all the children nodes inside this parent node. How can I delete the parent node only and not its descendants?
This question is similar to this on here Remove/hide compound node without removing/hiding descendants but I will appreciate it if some code samples are provided because in the doc here http://js.cytoscape.org/#collection/graph-manipulation/eles.move we have a shallow code example of edges but I am interested in nodes.
Thanks
You can delete a parent node by first moving its children to the parent's parent (if it exist, otherwise you should assig a null value) and then removing the parent node. Select a parent node and click on the delete button in the below example.
var cy = window.cy = cytoscape({
container: document.getElementById('cy'),
layout: {name: 'grid', rows: 2},
style: [{
selector: 'node',
css: {
'label': 'data(id)'
}
}
],
elements: {
nodes: [{
data: {
id: 'n0',
parent: 'n1'
}
},
{
data: {
id: 'n1',
parent: 'n2'
}
},
{
data: {
id: 'n2'
}
},
{
data: {
id: 'n3'
}
}
],
edges: [
{
data: {
id: 'n2n3',
source: 'n2',
target: 'n3',
weight: 7
}
}
]
}
});
document.getElementById("deleteButton").addEventListener("click", function() {
let selected = cy.nodes(':selected')[0];
selected.children().move({parent : (selected.parent().id() ? selected.parent().id() : null)});
selected.remove();
});
body {
font: 14px helvetica neue, helvetica, arial, sans-serif;
}
#button {
z-index = 1000;
}
#cy {
height: 95%;
width: 95%;
left: 0;
top: 50;
z-index = 900;
position: absolute;
}
<html>
<head>
<meta charset=utf-8 />
<meta name="viewport" content="user-scalable=no, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, minimal-ui">
<script src="https://unpkg.com/cytoscape@3.10.0/dist/cytoscape.min.js">
</script>
</head>
<body>
<button id="deleteButton" type="button">Delete selected</button>
<div id="cy"></div>
</body>
</html>