POC of a JS Array Adapter which enables d3 selections to amend its content.
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October 31, 2015 19:08
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D3 Adapter for JS Arrays
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| function d3ArrayAdapter(array) { | |
| return { | |
| ownerDocument: { | |
| createElement: function (tagName) { | |
| return { | |
| get __data__() { return this.row; }, | |
| set __data__(_) { this.row = array[this.index] = _; } | |
| }; | |
| } | |
| }, | |
| querySelectorAll: function (selectors) { | |
| if (selectors) throw "unsupported"; | |
| var context = this; | |
| return array.map(function (row, idx) { | |
| return { | |
| parentNode: context, | |
| get __data__() { return row; }, | |
| set __data__(_) { array[idx] = _; } | |
| }; | |
| }); | |
| }, | |
| appendChild: function (node) { | |
| node.parentNode = this; | |
| node.index = array.length; | |
| array.push(null); | |
| return node; | |
| }, | |
| insertBefore: function (node, referenceNode) { | |
| var idx = array.indexOf(node.__data__); | |
| var refIdx = array.indexOf(referenceNode.__data__); | |
| if (idx > refIdx) { | |
| array.splice(refIdx, 0, array.splice(idx, 1)[0]); | |
| } else if (idx < refIdx - 1) { | |
| array.splice(refIdx - 1, 0, array.splice(idx, 1)[0]); | |
| } | |
| return node; | |
| }, | |
| removeChild: function (node) { | |
| array.splice(array.indexOf(node.__data__), 1); | |
| return node; | |
| } | |
| }; | |
| } |
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script src="d3ArrayAdapter.js"></script> | |
| </head> | |
| <body> | |
| <script> | |
| var arr1 = ["a", "b", "c", "d", "e", "f", "z"]; | |
| var arr2 = ["z", "x", "a", "c", "f", "b"]; | |
| var tmp = d3.select(d3ArrayAdapter(arr1)); | |
| var join = tmp.selectAll("").data(arr2, function (d) { return d; }); | |
| join.enter().append("") | |
| .each(function (d) { | |
| console.log("enter: " + d); | |
| }) | |
| ; | |
| join | |
| .each(function (d) { | |
| console.log("update: " + d); | |
| }) | |
| ; | |
| join.exit() | |
| .each(function (d) { | |
| console.log("exit: " + d); | |
| }).remove() | |
| ; | |
| join.order(); | |
| var p = d3.select("body").selectAll("p").data(arr1); | |
| p.enter().append("p") | |
| .text(function(d) {return d;}) | |
| ; | |
| </script> | |
| </body> |
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