Maddy89
Reputation: 177
Compound nodes overlap while using grid layout in cytoscape.js
I am using cytoscape.js for my visualization project in which I have to show a Hierarchical structure with compound nodes.
So I initially used Cose-Bilkent layout which worked like a charm but the requirement is that all the child nodes of a parent must be in a single row. So I tried to tweak around a bit but couldn't get the exact result.
Then I tried to use grid layout by giving hardcoded row and column numbers and I got the exact result but as my data is dynamic I realized its difficult to assign row numbers and column numbers on my own.
Here is the data I used,
elements: [ // list of graph elements to start with
{ // node a
data: { id: 'X1', label: 'X1'}
},
{
data: { id: 'X2', label: 'X2'}
},
{
data: { id: 'X3', label: 'X3'}
},
{
data: { id: 'X4', label: 'X4'}
},
{
data: { id: 'X5', label: 'X5'}
},
{
data: { id: 'X6', label: 'X6'}
},
{
data: { id: 'X7', label: 'X7'}
},
{
data: { id: 'X8', label: 'X8'}
},
{
data: { id: 'X9', label: 'X9'}
},
{
data: { id: 'X10', label: 'X10'}
},
{
data: { id: 'X1e1',label: 'e1', parent: 'X1', row: '1' ,col: '1'}
},
{
data: { id: 'X1e5',label: 'e5', parent: 'X1', row: '1',col: '2'}
},
{
data: { id: 'X1e6',label: 'e6', parent: 'X1', row: '1',col: '3'}
},
{
data: { id: 'X2e2',label: 'e2', parent: 'X2', row: '3',col: '1'}
},
{
data: { id: 'X2e3',label: 'e3', parent: 'X2', row: '3',col: '2'}
},
{
data: { id: 'X3e4',label: 'e4', parent: 'X3', row: '4',col: '1'}
},
{
data: { id: 'X4e5',label: 'e5', parent: 'X4', row: '2',col: '1'}
},
{
data: { id: 'X4e6',label: 'e6', parent: 'X4', row: '2',col: '2'}
},
{
data: { id: 'X5e7',label: 'e7', parent: 'X5', row: '7',col: '1'}
},
{
data: { id: 'X6e8',label: 'e8', parent: 'X6', row: '5',col: '1'}
},
{
data: { id: 'X6e9',label: 'e9', parent: 'X6', row: '5',col: '2'}
},
{
data: { id: 'X7e10',label: 'e10', parent: 'X7', row: '7',col: '2'}
},
{
data: { id: 'X7e11',label: 'e11', parent: 'X7', row: '7',col: '3'}
},
{
data: { id: 'X7e12',label: 'e12', parent: 'X7', row: '7',col: '4'}
},
{
data: { id: 'X8e13',label: 'e13', parent: 'X8', row: '6',col: '1'}
},
{
data: { id: 'X8e14',label: 'e14', parent: 'X8', row: '6',col: '2'}
},
{
data: { id: 'X8e15',label: 'e15', parent: 'X8', row: '6',col: '3'}
},
{
data: { id: 'X8e16',label: 'e16', parent: 'X8', row: '6',col: '4'}
},
{
data: { id: 'X9e17',label: 'e17', parent: 'X9', row: '8',col: '1'}
},
{
data: { id: 'X10e18',label: 'e18', parent: 'X10', row: '8',col: '2'}
},
{
data: { id: 'X1e5X4e5', source:'X1e5', target:'X4e5'}
},
{
data: { id: 'X1e6X4e6', source:'X1e6', target:'X4e6'}
},
{
data: { id: 'X1e1X2', source:'X1e1', target:'X2'}
},
{
data: { id: 'X2e3X3', source:'X2e3', target:'X3'}
},
{
data: { id: 'X4e5X5', source:'X4e5', target:'X5'}
},
{
data: { id: 'X4e6X6', source:'X4e6', target:'X6'}
},
{
data: { id: 'X6X8e16', source:'X6', target:'X8e16'}
},
{
data: { id: 'X6e9X8', source:'X6e9', target:'X8'}
},
{
data: { id: 'X6e8X7', source:'X6e8', target:'X7'}
},
{
data: { id: 'X6X7e12', source:'X6', target:'X7e12'}
}
]
and layout
layout:{
name: 'grid',
fit: true,
position: function( node ){ return {row:node.data('row'), col:node.data('col') }}
}
And here is the result I got(and also expected) by setting manual rows and columns
Any help would be appreciated. Thanks
Upvotes: 2
Views: 1438
Answers (2)
Maddy89
Reputation: 177
The following code worked for me,
Please consider @Stephen's code if this doesn't work.
var cy = cytoscape({
container: /* your div within which you want to render */ ,
elements: [ /*list of graph elements to start with */ ] ,
style: [ /* the stylesheet for the graph */ ] ,
layout:{
name: 'cola',
fit: false,
infinite: false,
avoidOverlap: true
}
});
//Used to make child nodes stay on the same row
cy.ready(function(){
setTimeout(function(){
cy.zoom(0.5);
cy.nodes(':compound').forEach(function(comp,j,comps){
var nodePosition={};
if(comp.descendants().length>1)
{
var minX;
var maxY;
comp.descendants().forEach(function(ele,i,eles){
if(i==0)
{
minX=ele.renderedPosition('x');
maxY=ele.renderedPosition('y');
}
else
{
var tempX=ele.renderedPosition('x');
var tempY=ele.renderedPosition('y');
if(tempX<minX)
{
minX=tempX;
}
if(tempY>maxY)
{
maxY=tempY;
}
}
});
comp.descendants().forEach(function(ele,i,eles){
ele.renderedPosition({x:minX,y:maxY});
minX=minX+60;
});
}
cy.resize();
cy.fit();
cy.minZoom(cy.zoom());
});
},1000);
});
P.S: Don't forget to include the cytoscape scripts;)
Upvotes: 2
Stephan T.
Reputation: 6074
Well there are two extensions, which would achieve just what you need:
Coincidentally, both come from the same person, so this should not be a problem at all, all you have to do from there is to apply the right styles for the application to look like your example:
document.addEventListener("DOMContentLoaded", function() {
var cy = (window.cy = cytoscape({
container: document.getElementById("cy"),
layout: {
name: "evenParent"
},
style: [{
selector: "node",
style: {
"content": "data(id)",
"background-color": "#ad1a66"
}
},
{
selector: ":parent",
style: {
"background-opacity": 0.333
}
},
{
selector: "edge",
style: {
width: 3,
"line-color": "#ad1a66"
}
},
{
selector: "edge.meta",
style: {
width: 2,
"line-color": "red"
}
},
{
selector: ":selected",
style: {
"border-width": 3,
"border-color": "#DAA520"
}
}
],
elements: {
nodes: [{
data: {
id: "Jerry",
name: "Jerry"
}
},
{
data: {
id: "Elaine",
name: "Elaine"
}
},
{
data: {
id: "Kramer",
name: "Kramer"
}
},
{
data: {
id: "George",
name: "George"
}
},
{
data: {
id: "Martin",
name: "Martin"
}
},
{
data: {
id: "Philippe",
name: "Philippe"
}
},
{
data: {
id: "Louis",
name: "Louis"
}
},
{
data: {
id: "Genevieve",
name: "Genevieve"
}
},
{
data: {
id: "Leo",
name: "Leo"
}
},
{
data: {
id: "Larry",
name: "Larry"
}
},
{
data: {
id: "Logaina",
name: "Logaina"
}
}
],
edges: [{
data: {
source: "Jerry",
target: "Elaine"
}
},
{
data: {
source: "Jerry",
target: "Kramer"
}
},
{
data: {
source: "Jerry",
target: "George"
}
},
{
data: {
source: "Elaine",
target: "Martin"
}
},
{
data: {
source: "Elaine",
target: "Philippe"
}
},
{
data: {
source: "Elaine",
target: "Louis"
}
},
{
data: {
source: "Elaine",
target: "Genevieve"
}
},
{
data: {
source: "Elaine",
target: "Leo"
}
},
{
data: {
source: "Kramer",
target: "Larry"
}
},
{
data: {
source: "Kramer",
target: "Logaina"
}
}
]
}
}));
// demo your collection ext
cy.nodes().noOverlap({
padding: 5
});
});body {
font: 14px helvetica neue, helvetica, arial, sans-serif;
}
#cy {
height: 100%;
width: 100%;
position: absolute;
left: 0;
top: 0;
}<html>
<head>
<script src="https://unpkg.com/cytoscape/dist/cytoscape.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/cytoscape-even-parent.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/cytoscape-no-overlap.min.js"></script>
</head>
<body>
<div id="cy"></div>
</body>
</html>Upvotes: 4
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