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| import json
import dash
import dash_cytoscape as cyto
import dash_html_components as html
import dash_core_components as dcc
from dash.dependencies import Input, Output
app = dash.Dash(__name__)
styles = {
'pre': {
'border': 'thin lightgrey solid',
'overflowX': 'scroll'
}
}
nodes = [
{
'data': {'id': short, 'label': label},
'position': {'x': 20*lat, 'y': -20*long}
}
for short, label, long, lat in (
('la', 'Los Angeles', 34.03, -118.25),
('nyc', 'New York', 40.71, -74),
('to', 'Toronto', 43.65, -79.38),
('mtl', 'Montreal', 45.50, -73.57),
('van', 'Vancouver', 49.28, -123.12),
('chi', 'Chicago', 41.88, -87.63),
('bos', 'Boston', 42.36, -71.06),
('hou', 'Houston', 29.76, -95.37)
)
]
edges = [
{'data': {'source': source, 'target': target}}
for source, target in (
('van', 'la'),
('la', 'chi'),
('hou', 'chi'),
('to', 'mtl'),
('mtl', 'bos'),
('nyc', 'bos'),
('to', 'hou'),
('to', 'nyc'),
('la', 'nyc'),
('nyc', 'bos')
)
]
app.layout = html.Div([
cyto.Cytoscape(
id='cytoscape-event-callbacks-1',
layout={'name': 'circle'},
elements=edges+nodes,
style={'width': '100%', 'height': '450px'}
),
html.Pre(id='cytoscape-tapNodeData-json', style=styles['pre'])
])
@app.callback(Output('cytoscape-tapNodeData-json', 'children'),
Input('cytoscape-event-callbacks-1', 'tapNodeData'))
def displayTapNodeData(data):
return json.dumps(data, indent=2)
if __name__ == '__main__':
app.run_server(debug=True)
|
