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Distinguishing click and double-click in D3.
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <style> | |
| body { margin:0; padding:0; } | |
| #map { width:960px; height:500px; background:cyan; } | |
| </style> | |
| </head> | |
| <body> | |
| <div id='map'></div> | |
| <script> | |
| function clickcancel() { | |
| // we want to a distinguish single/double click | |
| // details http://bl.ocks.org/couchand/6394506 | |
| var event = d3.dispatch('click', 'dblclick'); | |
| function cc(selection) { | |
| var down, tolerance = 5, last, wait = null, args; | |
| // euclidean distance | |
| function dist(a, b) { | |
| return Math.sqrt(Math.pow(a[0] - b[0], 2), Math.pow(a[1] - b[1], 2)); | |
| } | |
| selection.on('mousedown', function() { | |
| down = d3.mouse(document.body); | |
| last = +new Date(); | |
| args = arguments; | |
| }); | |
| selection.on('mouseup', function() { | |
| if (dist(down, d3.mouse(document.body)) > tolerance) { | |
| return; | |
| } else { | |
| if (wait) { | |
| window.clearTimeout(wait); | |
| wait = null; | |
| event.dblclick.apply(this, args); | |
| } else { | |
| wait = window.setTimeout((function() { | |
| return function() { | |
| event.click.apply(this, args); | |
| wait = null; | |
| }; | |
| })(), 300); | |
| } | |
| } | |
| }); | |
| }; | |
| return d3.rebind(cc, event, 'on'); | |
| } | |
| var cc = clickcancel(); | |
| d3.select('#map').call(cc); | |
| cc.on('click', function(d, index) { | |
| d3.select('#map').text(d3.select('#map').text() + 'click, '); | |
| }); | |
| cc.on('dblclick', function(d, index) { | |
| d3.select('#map').text(d3.select('#map').text() + 'dblclick, '); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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