Add bulks of elements as JSON

[seekeramento]

We can use graph.fromJSON to add a bulk of cells at once as JSON. However, this clears the graph everytime. In my case, I want to add batches of operations; each batch as JSON. However, each batch clears the previous once.

Which API would be recommended in my case?

[kumilingus]

The dia.Graph.prototype.addCells method also accepts an array of JSON cells.

graph.addCells([{
  type: 'standard.Rectangle',
  size: { width: 100, height: 100 }
}, {
  type: 'standard.Ellipse',
  size: { width: 200, height: 100 }
}]);

Instead of graph.fromJSON(json), the following can be called to preserve existing cells:

graph.addCells(json.cells);

[seekeramento]

Thanks