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annotate d3.tip.js @ 5:457823710044

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Start to add beeswarm timeline of photos
author IBBoard <dev@ibboard.co.uk>
date Mon, 29 May 2017 16:08:09 +0100
parents a11817a35877
children
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1 // d3.tip
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2 // Copyright (c) 2013 Justin Palmer
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3 //
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4 // Tooltips for d3.js SVG visualizations
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5
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6 (function (root, factory) {
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7 if (typeof define === 'function' && define.amd) {
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8 // AMD. Register as an anonymous module with d3 as a dependency.
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9 define(['d3'], factory)
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10 } else if (typeof module === 'object' && module.exports) {
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11 // CommonJS
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12 var d3 = require('d3')
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13 module.exports = factory(d3)
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14 } else {
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15 // Browser global.
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16 root.d3.tip = factory(root.d3)
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17 }
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18 }(this, function (d3) {
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19
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20 // Public - contructs a new tooltip
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21 //
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22 // Returns a tip
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23 return function() {
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24 var direction = d3_tip_direction,
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25 offset = d3_tip_offset,
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26 html = d3_tip_html,
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27 node = initNode(),
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28 svg = null,
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29 point = null,
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30 target = null
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31
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32 function tip(vis) {
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33 svg = getSVGNode(vis)
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34 point = svg.createSVGPoint()
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35 document.body.appendChild(node)
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36 }
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37
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38 // Public - show the tooltip on the screen
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39 //
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40 // Returns a tip
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41 tip.show = function() {
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42 var args = Array.prototype.slice.call(arguments)
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43 if(args[args.length - 1] instanceof SVGElement) target = args.pop()
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44
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45 var content = html.apply(this, args),
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46 poffset = offset.apply(this, args),
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47 dir = direction.apply(this, args),
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48 nodel = getNodeEl(),
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49 i = directions.length,
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50 coords,
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51 scrollTop = document.documentElement.scrollTop || document.body.scrollTop,
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52 scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft
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53
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54 nodel.html(content)
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55 .style('opacity', 1).style('pointer-events', 'all')
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56
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57 while(i--) nodel.classed(directions[i], false)
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58 coords = direction_callbacks.get(dir).apply(this)
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59 nodel.classed(dir, true)
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60 .style('top', (coords.top + poffset[0]) + scrollTop + 'px')
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61 .style('left', (coords.left + poffset[1]) + scrollLeft + 'px')
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62
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63 return tip;
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64 };
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65
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66 // Public - hide the tooltip
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67 //
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68 // Returns a tip
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69 tip.hide = function() {
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70 var nodel = getNodeEl()
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71 nodel.style('opacity', 0).style('pointer-events', 'none')
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72 return tip
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73 }
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74
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75 // Public: Proxy attr calls to the d3 tip container. Sets or gets attribute value.
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76 //
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77 // n - name of the attribute
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78 // v - value of the attribute
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79 //
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80 // Returns tip or attribute value
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81 tip.attr = function(n, v) {
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82 if (arguments.length < 2 && typeof n === 'string') {
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83 return getNodeEl().attr(n)
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84 } else {
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85 var args = Array.prototype.slice.call(arguments)
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86 d3.selection.prototype.attr.apply(getNodeEl(), args)
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87 }
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88
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89 return tip
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90 }
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91
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92 // Public: Proxy style calls to the d3 tip container. Sets or gets a style value.
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93 //
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94 // n - name of the property
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95 // v - value of the property
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96 //
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97 // Returns tip or style property value
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98 tip.style = function(n, v) {
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99 if (arguments.length < 2 && typeof n === 'string') {
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100 return getNodeEl().style(n)
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101 } else {
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102 var args = Array.prototype.slice.call(arguments)
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103 d3.selection.prototype.style.apply(getNodeEl(), args)
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104 }
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105
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106 return tip
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107 }
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108
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109 // Public: Set or get the direction of the tooltip
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110 //
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111 // v - One of n(north), s(south), e(east), or w(west), nw(northwest),
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112 // sw(southwest), ne(northeast) or se(southeast)
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113 //
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114 // Returns tip or direction
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115 tip.direction = function(v) {
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116 if (!arguments.length) return direction
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117 direction = v == null ? v : functor(v)
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118
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119 return tip
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120 }
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121
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122 // Public: Sets or gets the offset of the tip
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123 //
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124 // v - Array of [x, y] offset
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125 //
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126 // Returns offset or
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127 tip.offset = function(v) {
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128 if (!arguments.length) return offset
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129 offset = v == null ? v : functor(v)
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130
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131 return tip
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132 }
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133
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134 // Public: sets or gets the html value of the tooltip
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135 //
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136 // v - String value of the tip
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137 //
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138 // Returns html value or tip
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139 tip.html = function(v) {
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140 if (!arguments.length) return html
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141 html = v == null ? v : functor(v)
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142
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143 return tip
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144 }
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145
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146 // Public: destroys the tooltip and removes it from the DOM
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147 //
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148 // Returns a tip
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149 tip.destroy = function() {
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150 if(node) {
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151 getNodeEl().remove();
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152 node = null;
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153 }
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154 return tip;
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155 }
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156
0
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157 function d3_tip_direction() { return 'n' }
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158 function d3_tip_offset() { return [0, 0] }
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159 function d3_tip_html() { return ' ' }
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160
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161 var direction_callbacks = d3.map({
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162 n: direction_n,
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163 s: direction_s,
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164 e: direction_e,
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165 w: direction_w,
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166 nw: direction_nw,
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167 ne: direction_ne,
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168 sw: direction_sw,
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169 se: direction_se
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170 }),
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171
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172 directions = direction_callbacks.keys()
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173
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174 function direction_n() {
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175 var bbox = getScreenBBox()
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176 return {
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177 top: bbox.n.y - node.offsetHeight,
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178 left: bbox.n.x - node.offsetWidth / 2
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179 }
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180 }
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181
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182 function direction_s() {
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183 var bbox = getScreenBBox()
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184 return {
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185 top: bbox.s.y,
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186 left: bbox.s.x - node.offsetWidth / 2
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187 }
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188 }
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189
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190 function direction_e() {
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191 var bbox = getScreenBBox()
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192 return {
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193 top: bbox.e.y - node.offsetHeight / 2,
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194 left: bbox.e.x
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195 }
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196 }
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197
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198 function direction_w() {
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199 var bbox = getScreenBBox()
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200 return {
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201 top: bbox.w.y - node.offsetHeight / 2,
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202 left: bbox.w.x - node.offsetWidth
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203 }
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204 }
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205
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206 function direction_nw() {
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207 var bbox = getScreenBBox()
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208 return {
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209 top: bbox.nw.y - node.offsetHeight,
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210 left: bbox.nw.x - node.offsetWidth
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211 }
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212 }
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213
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214 function direction_ne() {
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215 var bbox = getScreenBBox()
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216 return {
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217 top: bbox.ne.y - node.offsetHeight,
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218 left: bbox.ne.x
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219 }
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220 }
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221
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222 function direction_sw() {
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223 var bbox = getScreenBBox()
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224 return {
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225 top: bbox.sw.y,
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226 left: bbox.sw.x - node.offsetWidth
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227 }
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228 }
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229
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230 function direction_se() {
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231 var bbox = getScreenBBox()
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232 return {
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233 top: bbox.se.y,
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234 left: bbox.e.x
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235 }
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236 }
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237
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238 function initNode() {
1
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239 var node = d3.select(document.createElement('div'));
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240 node.style('position', 'absolute').style('top', 0).style('opacity', 0)
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241 .style('pointer-events', 'none').style('box-sizing', 'border-box')
0
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242
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243 return node.node()
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244 }
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245
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246 function getSVGNode(el) {
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247 el = el.node()
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248 if(el.tagName.toLowerCase() === 'svg')
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249 return el
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250
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251 return el.ownerSVGElement
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252 }
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253
1
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254 function getNodeEl() {
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255 if(node === null) {
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256 node = initNode();
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257 // re-add node to DOM
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258 document.body.appendChild(node);
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259 };
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260 return d3.select(node);
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261 }
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262
0
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263 // Private - gets the screen coordinates of a shape
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264 //
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265 // Given a shape on the screen, will return an SVGPoint for the directions
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266 // n(north), s(south), e(east), w(west), ne(northeast), se(southeast), nw(northwest),
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267 // sw(southwest).
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268 //
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269 // +-+-+
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270 // | |
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271 // + +
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272 // | |
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273 // +-+-+
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274 //
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275 // Returns an Object {n, s, e, w, nw, sw, ne, se}
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276 function getScreenBBox() {
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277 var targetel = target || d3.event.target;
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278
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279 while ('undefined' === typeof targetel.getScreenCTM && 'undefined' === targetel.parentNode) {
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280 targetel = targetel.parentNode;
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281 }
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282
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283 var bbox = {},
0
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284 matrix = targetel.getScreenCTM(),
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285 tbbox = targetel.getBBox(),
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286 width = tbbox.width,
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287 height = tbbox.height,
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288 x = tbbox.x,
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289 y = tbbox.y
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290
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291 point.x = x
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292 point.y = y
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293 bbox.nw = point.matrixTransform(matrix)
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294 point.x += width
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295 bbox.ne = point.matrixTransform(matrix)
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296 point.y += height
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297 bbox.se = point.matrixTransform(matrix)
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298 point.x -= width
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299 bbox.sw = point.matrixTransform(matrix)
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300 point.y -= height / 2
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301 bbox.w = point.matrixTransform(matrix)
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302 point.x += width
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303 bbox.e = point.matrixTransform(matrix)
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304 point.x -= width / 2
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305 point.y -= height / 2
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306 bbox.n = point.matrixTransform(matrix)
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307 point.y += height
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308 bbox.s = point.matrixTransform(matrix)
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309
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310 return bbox
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311 }
1
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312
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313 // Private - replace D3JS 3.X d3.functor() function
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314 function functor(v) {
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315 return typeof v === "function" ? v : function() {
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316 return v
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317 }
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318 }
0
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319
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320 return tip
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321 };
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322
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323 }));