Last active
December 23, 2015 03:28
-
-
Save theicfire/6573314 to your computer and use it in GitHub Desktop.
Resizable line with handles | SVG, d3.js, Javascript
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"> | |
| <style> | |
| svg { | |
| float: left; | |
| } | |
| line { | |
| shape-rendering: crispEdges; | |
| stroke-width: 1px; | |
| fill: none; | |
| stroke: #000; | |
| } | |
| </style> | |
| <script src="http://mbostock.github.com/d3/d3.js?2.7.1"></script> | |
| <body> | |
| <script> | |
| var width = 300, | |
| height = 100, | |
| handle_height = 10; | |
| var max_x = 200; | |
| var min_x = 0; | |
| var grab_width = 30; | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width+10) | |
| .attr("height", height); | |
| var axis = svg.append('g') | |
| .attr('class', 'interval-range') | |
| .attr('transform', 'translate(5, 10)'); | |
| axis.append('line') | |
| .attr('class', 'interval-range-line') | |
| .attr('y2', 0) | |
| .attr('x2', max_x); | |
| make_handle('right'); | |
| make_handle('left'); | |
| function make_handle (direction) { | |
| var set_handle_position = function (handle, direction) { | |
| handle.attr('y1', -handle_height).attr('y2', handle_height + 1); | |
| if (direction === 'right') { | |
| handle.attr('x1', max_x).attr('x2', max_x) | |
| } | |
| } | |
| var good_x = function(x) { | |
| return Math.max(Math.min(max_x, x), min_x); | |
| } | |
| var drag_handle = function (direction) { | |
| return d3.behavior.drag() | |
| .on('drag', function (d) { | |
| var x = good_x(d3.event.x); | |
| d3.select('.interval-range-line') | |
| .attr(direction === 'right' ? 'x2' : 'x1', x); | |
| d3.selectAll('.interval-' + direction + '-handle line') | |
| .attr('x1', x) | |
| .attr('x2', x); | |
| }); | |
| } | |
| var handle = axis.append('g') | |
| .attr('class', 'interval-' + direction + '-handle') | |
| .call(drag_handle(direction)); | |
| // a hidden but thick line to make clicking easier | |
| var hidden_handle = handle.append('line') | |
| .style('stroke-width', grab_width) | |
| .style('opacity', 0); | |
| set_handle_position(hidden_handle, direction); | |
| var visible_handle = handle.append('line'); | |
| set_handle_position(visible_handle, direction); | |
| } | |
| </script> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Example: http://chasediscs.com/gists/resizeable-line.html