1 | var prevOverlays = [];
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2 |
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3 | function undo() {
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4 |
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5 | for (var i = 0; i < overlays.length; i++) {
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6 | overlays[i].setMap(null);
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7 |
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8 | }
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9 | if (prevOverlays.length != 0){
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10 | overlays = [];
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11 | console.log(prevOverlays);
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12 | var prev_overlay = prevOverlays.pop();
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13 |
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14 | for (var i = 0; i < prev_overlay.length; i++) {
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15 | overlays[i] = prev_overlay[i];
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16 | overlays[i].setMap(map);
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17 | }
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18 |
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19 | }
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20 |
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21 | //Deactivated at the moment
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22 | if(enableSelectionFeature){
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23 | selectedShapes = [];
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24 | var i = 0;
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25 | var lastEntry = prevOverlays[prevOverlays.length-1][i];
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26 | console.log(prevOverlays[prevOverlays.length-1].length);
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27 |
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28 | for(var i = 0; i < lastEntry.length; i++){
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29 | selectedShapes.push(prevOverlays)
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30 | console.log("comes here");
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31 | }
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32 |
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33 | }
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34 |
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35 |
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36 | }
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37 |
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38 | function clonePath(path)
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39 | {
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40 | var clone_path = [];
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41 |
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42 | for (var i = 0; i < path.length; i++) {
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43 | var lati = path.getAt(i).lat();
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44 | var lngi = path.getAt(i).lng();
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45 | clone_lat_lng = {
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46 | lat: lati,
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47 | lng: lngi
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48 | };
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49 | clone_path.push(clone_lat_lng);
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50 | }
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51 |
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52 | return clone_path;
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53 | }
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54 |
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55 | function clonePolyline(polyline)
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56 | {
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57 | var path = polyline.getPath();
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58 | var geodesic = polyline.geodesic;
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59 | var strokeColor = polyline.strokeColor;
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60 | var strokeOpacity = polyline.strokeOpacity;
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61 | var strokeWeight = polyline.strokeWeight;
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62 | var clone_path = clonePath(path);
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63 | //var editable = rect.editable;
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64 |
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65 | var clone_polyline = new google.maps.Polyline({
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66 | geodesic: geodesic,
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67 | strokeColor: strokeColor,
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68 | strokeOpacity: strokeOpacity,
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69 | strokeWeight: strokeWeight,
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70 | path: clone_path,
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71 | draggable: true,
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72 | editable: false
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73 | });
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74 |
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75 | clone_polyline.type = google.maps.drawing.OverlayType.POLYLINE;
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76 |
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77 | return clone_polyline;
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78 | }
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79 |
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80 | function clonePolygon(polygon)
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81 | {
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82 | var path = polygon.getPath();
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83 | var geodesic = polygon.geodesic;
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84 | var strokeColor = polygon.strokeColor;
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85 | var strokeOpacity = polygon.strokeOpacity;
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86 | var strokeWeight = polygon.strokeWeight;
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87 | var fillColor = polygon.fillColor;
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88 | var fillOpacity = polygon.fillOpacity;
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89 | var clone_path = clonePath(path);
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90 | //var editable = rect.editable;
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91 |
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92 | var clone_polygon = new google.maps.Polygon({
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93 | geodesic: geodesic,
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94 | strokeColor: strokeColor,
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95 | strokeOpacity: strokeOpacity,
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96 | strokeWeight: strokeWeight,
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97 | fillColor: fillColor,
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98 | fillOpacity: fillOpacity,
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99 | path: clone_path,
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100 | draggable: true,
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101 | editable: false
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102 | });
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103 |
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104 | clone_polygon.type = google.maps.drawing.OverlayType.POLYGON;
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105 |
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106 | return clone_polygon;
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107 | }
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108 |
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109 | function cloneRectangle(rect)
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110 | {
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111 | var strokeColor = rect.strokeColor;
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112 | var strokeOpacity = rect.strokeOpacity;
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113 | var strokeWeight = rect.strokeWeight;
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114 | var fillColor = rect.fillColor;
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115 | var fillOpacity = rect.fillOpacity;
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116 | var bounds = rect.getBounds();
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117 | //var editable = rect.editable;
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118 |
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119 | var clone_rect = new google.maps.Rectangle({
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120 | strokeColor: strokeColor,
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121 | strokeOpacity: strokeOpacity,
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122 | strokeWeight: strokeWeight,
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123 | fillColor: fillColor,
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124 | fillOpacity: fillOpacity,
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125 | bounds: bounds,
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126 | draggable: true,
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127 | editable: false
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128 | });
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129 |
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130 | clone_rect.type = google.maps.drawing.OverlayType.RECTANGLE;
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131 |
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132 | return clone_rect;
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133 | }
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134 |
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135 | function cloneCircle(circ)
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136 | {
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137 | var strokeColor = circ.strokeColor;
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138 | var strokeOpacity = circ.strokeOpacity;
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139 | var strokeWeight = circ.strokeWeight;
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140 | var fillColor = circ.fillColor;
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141 | var fillOpacity = circ.fillOpacity;
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142 | var center = circ.center;
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143 | var radius = circ.radius;
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144 | //var editable = rect.editable;
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145 |
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146 | var clone_circ = new google.maps.Circle({
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147 | strokeColor: strokeColor,
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148 | strokeOpacity: strokeOpacity,
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149 | strokeWeight: strokeWeight,
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150 | fillColor: fillColor,
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151 | fillOpacity: fillOpacity,
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152 | center: center,
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153 | radius: radius,
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154 | draggable: true,
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155 | editable: false
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156 | });
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157 |
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158 | clone_circ.type = google.maps.drawing.OverlayType.CIRCLE;
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159 |
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160 | return clone_circ;
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161 | }
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162 |
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163 |
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164 | function cloneShape(shape)
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165 | {
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166 | if (shape.type === google.maps.drawing.OverlayType.POLYLINE) {
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167 | var clone_polyline = clonePolyline(shape);
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168 | return clone_polyline;
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169 | }
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170 | else if (shape.type === google.maps.drawing.OverlayType.POLYGON) {
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171 | var clone_polygon = clonePolygon(shape);
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172 | return clone_polygon;
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173 | }
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174 | else if (shape.type === google.maps.drawing.OverlayType.RECTANGLE) {
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175 | var clone_rect = cloneRectangle(shape);
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176 | return clone_rect;
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177 |
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178 | }
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179 | else if (shape.type === google.maps.drawing.OverlayType.CIRCLE) {
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180 | var clone_circ = cloneCircle(shape);
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181 | return clone_circ;
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182 |
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183 | }
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184 | else {
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185 | console.error("Unrecognized shape: " + shape);
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186 | return null;
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187 | }
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188 | }
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189 |
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190 | function overlayItemIsShape(overlay_item)
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191 | {
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192 | var type = overlay_item.type;
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193 |
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194 | is_shape = (type === google.maps.drawing.OverlayType.POLYLINE)
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195 | || (type === google.maps.drawing.OverlayType.POLYGON)
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196 | || (type === google.maps.drawing.OverlayType.RECTANGLE)
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197 | || (type === google.maps.drawing.OverlayType.CIRCLE);
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198 |
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199 | return is_shape;
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200 | }
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201 |
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202 | function historyOverlayPush()
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203 | {
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204 | console.log("comes here");
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205 | var overlays_copy = [];
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206 | for (var i = 0; i<overlays.length; i++) {
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207 | var clone_shape = cloneShape(overlays[i]);
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208 | if (overlayItemIsShape(clone_shape)) {
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209 | addShapeListeners(clone_shape,null); // don't have an overlay event!
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210 | }
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211 | else {
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212 | addMarkerListeners(clone_shape,null); // don't have an overlay event!
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213 | }
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214 | overlays_copy[i] = clone_shape;
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215 | }
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216 |
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217 | prevOverlays.push(overlays_copy);
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218 | }
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