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Multitouch Drag
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| license: gpl-3.0 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width"> | |
| <style> | |
| html, | |
| body { | |
| height: 100%; | |
| margin: 0; | |
| overflow: hidden; | |
| } | |
| svg { | |
| position: absolute; | |
| } | |
| </style> | |
| <body> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var width = self.frameElement ? 960 : innerWidth, | |
| height = self.frameElement ? 500 : innerHeight; | |
| var data = d3.range(20).map(function() { return [Math.random() * width, Math.random() * height]; }); | |
| var color = d3.scale.category10(); | |
| var drag = d3.behavior.drag() | |
| .origin(function(d) { return {x: d[0], y: d[1]}; }) | |
| .on("dragstart", dragstarted) | |
| .on("drag", dragged) | |
| .on("dragend", dragended); | |
| d3.select("body") | |
| .on("touchstart", nozoom) | |
| .on("touchmove", nozoom) | |
| .append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .selectAll("circle") | |
| .data(data) | |
| .enter().append("circle") | |
| .attr("transform", function(d) { return "translate(" + d + ")"; }) | |
| .attr("r", 32) | |
| .style("fill", function(d, i) { return color(i); }) | |
| .call(drag); | |
| function dragstarted() { | |
| this.parentNode.appendChild(this); | |
| d3.select(this).transition() | |
| .ease("elastic") | |
| .duration(500) | |
| .attr("r", 48); | |
| } | |
| function dragged(d) { | |
| d[0] = d3.event.x; | |
| d[1] = d3.event.y; | |
| d3.select(this) | |
| .attr("transform", "translate(" + d + ")"); | |
| } | |
| function dragended() { | |
| d3.select(this).transition() | |
| .ease("elastic") | |
| .duration(500) | |
| .attr("r", 32); | |
| } | |
| function nozoom() { | |
| d3.event.preventDefault(); | |
| } | |
| </script> |
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