Implementasi update endpoint saat mouse drag
mouse drag = mousedown + mousemove
update starting point on mousedown
Last active
February 26, 2017 08:57
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Update starting point on mousedown
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| license: mit | |
| height: 300 | |
| border: no |
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| <!DOCTYPE html> | |
| <!--[if lt IE 7]> <html class="no-js lt-ie9 lt-ie8 lt-ie7"> <![endif]--> | |
| <!--[if IE 7]> <html class="no-js lt-ie9 lt-ie8"> <![endif]--> | |
| <!--[if IE 8]> <html class="no-js lt-ie9"> <![endif]--> | |
| <!--[if gt IE 8]><!--> <html class="no-js"> <!--<![endif]--> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge"> | |
| <title>Update End Point on Mousemove</title> | |
| <meta name="description" content=""> | |
| <meta name="viewport" content="width=device-width, initial-scale=1"> | |
| </head> | |
| <body> | |
| <!--[if lt IE 7]> | |
| <p class="browsehappy">You are using an <strong>outdated</strong> browser. Please <a href="#">upgrade your browser</a> to improve your experience.</p> | |
| <![endif]--> | |
| <div id="d3-drawing-area"></div> | |
| <script src="//cdnjs.cloudflare.com/ajax/libs/d3/4.6.0/d3.min.js"></script> | |
| <script> | |
| var svg = d3.select('#d3-drawing-area').append('svg') | |
| .attr('width', 300) | |
| .attr('height', 300) | |
| .style('background', 'lightblue'); | |
| var line = svg.append('line') | |
| .attr('x1', 100) | |
| .attr('y1', 100) | |
| .attr('x2', 200) | |
| .attr('y2', 200) | |
| .style('stroke', 'blue') | |
| .style('stroke-width', 2); | |
| var drag = false; | |
| svg.on('mousedown', function() { | |
| drag = true; | |
| var mousePosition = d3.mouse(this); | |
| line | |
| .attr('x1', mousePosition[0]) | |
| .attr('y1', mousePosition[1]) | |
| .attr('x2', mousePosition[0]) | |
| .attr('y2', mousePosition[1]); | |
| }); | |
| // update endpoint on mousemove over svg | |
| svg.on('mousemove', function() { | |
| if(!drag) { | |
| return; | |
| } | |
| // get mouse position relative to "this" svg | |
| var mousePosition = d3.mouse(this); | |
| // use it to update endpoint (x2, y2) | |
| line | |
| .attr('x2', mousePosition[0]) | |
| .attr('y2', mousePosition[1]); | |
| }); | |
| svg.on('mouseup', function() { | |
| drag = false; | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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