map is cleared when invoking new d3.json

[anusurendra]

@zakandrewking, Is there a way to prevent a created map being cleared when invoking d3.json to upload a new model json file. Below is the code I am using to updating a model json file:

d3.json("model_files/e_coli_core.json", function(error, data) {
     if (error) console.warn(error);
     var options = {menu: 'all', canvas_size_and_loc: { x: '200', y: '200', width: '5000', height: '5000' }};
     var b = escher.Builder(null, data, null, d3.select('#model_container'), options);
   });

[zakandrewking]

yes. rather than creating a new Builder, you want to apply the map to the existing Builder with:

b.load_model(data, true)

Documentation is here: https://escher.readthedocs.io/en/stable/javascript_api.html#load_model

[anusurendra]

@zakandrewking,

Thank you for your quick reply and help. I used the b.load_model(data, true). However, the map is still being clear. here is the code I used:

d3.json("model_files/e_coli_core.json", function(error, data) {
     var options = {menu: 'all', canvas_size_and_loc: { x: '200', y: '200', width: '5000', height: '5000' }};
     var b = escher.Builder(null, data, null, d3.select('#model_container'), options);
     b.load_model(data, true);
  });

[zakandrewking]

yes, the issue here is that the map will be cleared any time escher.Builder() is called. What you want is this:

var options = {menu: 'all', canvas_size_and_loc: { x: '200', y: '200', width: '5000', height: '5000' }};
var b = escher.Builder(null, data, null, d3.select('#model_container'), options);

// ... at some later time ...

d3.json("model_files/e_coli_core.json", function(error, data) {
    // this should not reload the map
     b.load_model(data, true);
  });

[anusurendra]

@zakandrewking thanks again zak. Do know of a way to store the var b = escher.Builder(null, data, null, d3.select('#model_container'), options); object? I have tried using JSON.stringify, but it is not keep the functions and constructors.

[zakandrewking]

That depends a lot on your app, but, like you said, you cannot keep it as JSON, so you'll have to keep the variable somewhere. On Thu, Jan 4, 2018 at 1:40 PM Anu Surendra notifications@github.com wrote:

@zakandrewking https://github.com/zakandrewking thanks again zak. Do know of a way to store the var b = escher.Builder(null, data, null, d3.select('#model_container'), options); object? I have tried using JSON.stringify, but it is not keep the functions and constructors.

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