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1 <!DOCTYPE html> |
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2 <html> |
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3 <head> |
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4 <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/> |
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5 <title>Brush</title> |
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6 <script type="text/javascript" src="../../d3.js"></script> |
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7 <style type="text/css"> |
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8 |
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9 svg { |
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10 font: 10px sans-serif; |
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11 } |
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12 |
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13 circle { |
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14 -webkit-transition: fill-opacity 250ms linear; |
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15 } |
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16 |
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17 .selecting circle { |
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18 fill-opacity: .2; |
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19 } |
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20 |
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21 .selecting circle.selected { |
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22 stroke: #f00; |
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23 } |
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24 |
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25 .axis path, .axis line { |
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26 fill: none; |
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27 stroke: #000; |
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28 shape-rendering: crispEdges; |
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29 } |
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30 |
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31 .brush .extent { |
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32 stroke: #fff; |
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33 fill-opacity: .125; |
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34 shape-rendering: crispEdges; |
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35 } |
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36 |
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37 </style> |
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38 </head> |
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39 <body> |
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40 <script type="text/javascript"> |
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41 |
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42 var random = d3.random.normal(.5, .1), |
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43 data = d3.range(800).map(function() { return [random(), random()]; }); |
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44 |
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45 var m = [10, 10, 20, 40], |
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46 w = 960 - m[1] - m[3], |
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47 h = 500 - m[0] - m[2]; |
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48 |
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49 var x = d3.scale.linear().range([0, w]), |
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50 y = d3.scale.linear().range([h, 0]); |
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51 |
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52 var svg = d3.select("body").append("svg:svg") |
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53 .attr("width", w + m[1] + m[3]) |
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54 .attr("height", h + m[0] + m[2]) |
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55 .append("svg:g") |
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56 .attr("transform", "translate(" + m[3] + "," + m[0] + ")"); |
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57 |
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58 svg.append("svg:g") |
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59 .attr("class", "x axis") |
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60 .attr("transform", "translate(0," + h + ")") |
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61 .call(d3.svg.axis().scale(x).orient("bottom")); |
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62 |
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63 svg.append("svg:g") |
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64 .attr("class", "y axis") |
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65 .call(d3.svg.axis().scale(y).orient("left")); |
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66 |
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67 var circle = svg.selectAll("circle") |
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68 .data(data) |
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69 .enter().append("svg:circle") |
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70 .attr("transform", function(d) { return "translate(" + x(d[0]) + "," + y(d[1]) + ")"; }) |
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71 .attr("r", 3.5); |
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72 |
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73 svg.append("svg:g") |
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74 .attr("class", "brush") |
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75 .call(d3.svg.brush().x(x).y(y) |
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76 .on("brushstart", brushstart) |
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77 .on("brush", brush) |
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78 .on("brushend", brushend)); |
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79 |
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80 function brushstart() { |
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81 svg.classed("selecting", true); |
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82 } |
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83 |
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84 function brush() { |
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85 var e = d3.event.target.extent(); |
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86 circle.classed("selected", function(d) { |
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87 return e[0][0] <= d[0] && d[0] < e[1][0] |
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88 && e[0][1] <= d[1] && d[1] < e[1][1]; |
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89 }); |
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90 } |
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91 |
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92 function brushend() { |
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93 svg.classed("selecting", !d3.event.target.empty()); |
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94 } |
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95 |
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96 </script> |
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97 </body> |
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98 </html> |