Adjust the node's location in Cytoscape.js

I recently switched from using Cola to fCose in Cytoscape.js for graphing multiple graphs with no connections.

With Cola, I was able to manually set node positions by tweaking the layout options. However, with fCose, despite adjusting variables like quality, randomize, and animate, passing coordinates of nodes seems to have no effect on the final rendering.

In the fCose defaults, I tried setting quality to "proof" and randomize/animate to false, but it didn't help. Even adding positions: undefined did not change the node positioning. How can I achieve manual node positioning with fCose?

javascriptcytoscape.js

Answer №1

When utilizing fCoSE, the option to randomize the positions of nodes can be set to true or false. If set to true, nodes will be initially placed in random positions before the algorithm attempts to find an optimal layout for the graph.

If randomize is set to false, the algorithm will begin from the current positions of the nodes. The current positions refer to the position attribute found in each cytoscape node. To start the layout from specific desired positions, it is necessary to assign those positions to nodes using node.position() or nodes.positions() and then initiate the layout with randomize set to false. Otherwise, the layout does not directly support setting initial positions.

Answer №2

I managed to overcome the issue using cytoscape js and leveraging the 'preset' layout options.

If you prefer to define node positions manually in your elements JSON, you can opt for the preset layout — by default, it does not alter any positions, keeping your nodes in their current locations (as specified in options.elements during initialization).

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