Capture events from input elements outside the visualization. Similar to what is done at min 3:19 in the Reactive Vega video
<iframe class="player" src="//player.vimeo.com/video/100936827" width="630" height="354" frameborder="0" webkitallowfullscreen="1" mozallowfullscreen="1" allowfullscreen="1"></iframe>
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August 29, 2015 14:27
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Vega 2.0 interact with DOM events
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| <html> | |
| <head> | |
| <title>Vega Experiment: interaction from events external to the viz</title> | |
| <script src="http://vega.github.io/vega-editor/vendor/d3.min.js"></script> | |
| <script src="http://vega.github.io/vega/vega.min.js"></script> | |
| </head> | |
| <body> | |
| <div id="vis"></div> | |
| <p> | |
| <form> | |
| <b>Color:</b> | |
| <input type="radio" name="color" value="red" checked="checked">Red | |
| <input type="radio" name="color" value="green">Green | |
| <input type="radio" name="color" value="blue">Blue | |
| </form> | |
| </p> | |
| </body> | |
| <script type="text/javascript"> | |
| // parse a spec and create a visualization view | |
| function parse(spec) { | |
| vg.parse.spec(spec, function(chart) { chart({el:"#vis"}).update(); }); | |
| } | |
| parse("spec.json"); | |
| </script> | |
| </html> |
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| { | |
| "width": 200, | |
| "height": 200, | |
| "background": "#edf1f7", | |
| "signals": [ | |
| { | |
| "name": "selectcolor", | |
| "init": {"value": "yellow"}, | |
| "streams": [ | |
| {"type": "input[name=color]:click", "expr": "{'value': event.target.value}"} | |
| ] | |
| } | |
| ], | |
| "marks": [ | |
| { | |
| "type": "rect", | |
| "properties": { | |
| "enter": { | |
| "x": {"value": 50}, | |
| "y": {"value": 50}, | |
| "width": {"value": 30}, | |
| "height": {"value": 30}, | |
| "fill": {"signal": "selectcolor.value"} | |
| }, | |
| "update": { | |
| "fill": {"signal": "selectcolor.value"} | |
| } | |
| } | |
| } | |
| ] | |
| } |
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