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| 1 | +<!DOCTYPE html> |
| 2 | +<html> |
| 3 | + <head> |
| 4 | + <title>Mapbox GL JS debug page</title> |
| 5 | + <meta charset="utf-8" /> |
| 6 | + <meta |
| 7 | + name="viewport" |
| 8 | + content="width=device-width, initial-scale=1.0, user-scalable=no" |
| 9 | + /> |
| 10 | + <script |
| 11 | + include="filesaver,draw,domtoimage" |
| 12 | + src="../../libs/zondyclient/include-mapboxgl-local.js" |
| 13 | + ></script> |
| 14 | + <style> |
| 15 | + body { |
| 16 | + margin: 0; |
| 17 | + padding: 0; |
| 18 | + } |
| 19 | + |
| 20 | + html, |
| 21 | + body, |
| 22 | + #map { |
| 23 | + height: 99%; |
| 24 | + } |
| 25 | + </style> |
| 26 | + </head> |
| 27 | + |
| 28 | + <body> |
| 29 | + <div class="ToolLib" onclick="rectAngle()"> |
| 30 | + <input type="button" class="ButtonLib" id="export-png" value="拉框选择" /> |
| 31 | + </div> |
| 32 | + <div id="map"></div> |
| 33 | + <script> |
| 34 | + var extent = {}; //地图范围 |
| 35 | + var scale; //比例尺 |
| 36 | + var extent_km = 111.319490793274; //在经线上，相差一纬度约111km |
| 37 | + var extent_km_lat; //在纬线上，相差一经度约111cosα（α该纬线纬度），1KM就是该纬线应约1/(111*cosα)=0.009cosα度，度数纬度关，这样就是1公里对应的纬线度数。 |
| 38 | + |
| 39 | + function rectAngle() { |
| 40 | + draw.changeMode("draw_rectangle"); |
| 41 | + } |
| 42 | + |
| 43 | + /** |
| 44 | + * 将获取的图片路径转成blob |
| 45 | + * @param dataURI |
| 46 | + * @returns {*} |
| 47 | + * @private |
| 48 | + */ |
| 49 | + function _dataURItoBlob(dataURI) { |
| 50 | + var byteString = atob(dataURI.split(",")[1]); |
| 51 | + var mimeString = dataURI |
| 52 | + .split(",")[0] |
| 53 | + .split(":")[1] |
| 54 | + .split(";")[0]; |
| 55 | + var ab = new ArrayBuffer(byteString.length); |
| 56 | + var dw = new DataView(ab); |
| 57 | + for (var i = 0; i < byteString.length; i++) { |
| 58 | + dw.setUint8(i, byteString.charCodeAt(i)); |
| 59 | + } |
| 60 | + return new Blob([ab], { |
| 61 | + type: mimeString |
| 62 | + }); |
| 63 | + } |
| 64 | + |
| 65 | + /** |
| 66 | + * 获取建议的比例尺，比例尺也可以自己设置 |
| 67 | + */ |
| 68 | + function getRecommendScale() { |
| 69 | + var x_min = extent.xmin; |
| 70 | + var y_min = extent.ymin; |
| 71 | + var x_max = extent.xmax; |
| 72 | + var y_max = extent.ymax; |
| 73 | + var map_width = (x_max - x_min) * extent_km * 1000 * 1000; //宽度 从 度单位 换算成 毫米单位 |
| 74 | + var map_height = (y_max - y_min) * extent_km * 1000 * 1000; //高度 从 度单位 换算成 毫米单位 |
| 75 | + var paper_width = 297; //纸张宽度,默认为横版A4大小 毫米 |
| 76 | + var paper_height = 210; //纸张高度,默认为横版A4大小 毫米 |
| 77 | + var r_scale = |
| 78 | + map_width / paper_width > map_height / paper_height |
| 79 | + ? Math.ceil(map_width / paper_width) |
| 80 | + : Math.ceil(map_height / paper_height); |
| 81 | + var log10 = r_scale.toString().length - 1; |
| 82 | + var pow10 = Math.pow(10, log10); |
| 83 | + scale = Math.ceil(r_scale / pow10) * pow10; //直接使用推荐的比例尺 |
| 84 | + console.log(r_scale, log10, pow10, scale); //66400 4 10000 70000 |
| 85 | + } |
| 86 | + |
| 87 | + /** |
| 88 | + * 获取输出版面坐标范围，默认以横版A4大小输出 |
| 89 | + * @returns {{}} |
| 90 | + */ |
| 91 | + function layoutSetting() { |
| 92 | + var x_min = extent.xmin; |
| 93 | + var y_min = extent.ymin; |
| 94 | + var x_max = extent.xmax; |
| 95 | + var y_max = extent.ymax; |
| 96 | + //地图实际宽度 |
| 97 | + var map_width = (x_max - x_min) * extent_km * 1000 * 1000; |
| 98 | + //地图实际高度 |
| 99 | + var map_height = (y_max - y_min) * extent_km * 1000 * 1000; |
| 100 | + //纸张宽度,默认为横版A4大小 |
| 101 | + var paper_width = 297; |
| 102 | + //纸张高度,默认为横版A4大小 |
| 103 | + var paper_height = 210; |
| 104 | + //根据比例尺调整后的地图宽度(mm) |
| 105 | + var scale_map_width = Math.round(map_width / scale); |
| 106 | + //根据比例尺调整后的地图高度(mm) |
| 107 | + var scale_map_height = Math.round(map_height / scale); |
| 108 | + |
| 109 | + //纸张与地图的宽度差值 |
| 110 | + var differ_width_val = (paper_width - scale_map_width) / 2; |
| 111 | + //纸张与地图的高度差值 |
| 112 | + var differ_height_val = (paper_height - scale_map_height) / 2; |
| 113 | + |
| 114 | + var differ_x_extent = |
| 115 | + (differ_width_val * scale) / 1000 / 1000 / this.extent_km; //毫米 换算成 度 |
| 116 | + var differ_y_extent = |
| 117 | + (differ_height_val * scale) / 1000 / 1000 / this.extent_km; //毫米 换算成 度 |
| 118 | + //版面的左上角x坐标 |
| 119 | + var layout_l_x = x_min - differ_x_extent; |
| 120 | + //版面的左上角y坐标 |
| 121 | + var layout_l_y = y_max + differ_y_extent; |
| 122 | + //版面的右下角x坐标 |
| 123 | + var layout_r_x = x_max + differ_x_extent; |
| 124 | + //版面的右下角y坐标 |
| 125 | + var layout_r_y = y_min - differ_y_extent; |
| 126 | + |
| 127 | + //输出版面范围 |
| 128 | + // var bounds = [[layout_l_y, layout_l_x], [layout_r_y, layout_r_x]]; |
| 129 | + // var Rectangle = L.rectangle(bounds, { |
| 130 | + // color: '#ffcc33', |
| 131 | + // weight: 2, |
| 132 | + // fillColor: 'rgba(255, 255, 255, 0)' |
| 133 | + // }); |
| 134 | + // Rectangle.name = "layoutSetting"; |
| 135 | + // Rectangle.addTo(map); |
| 136 | + var layExtent = {}; |
| 137 | + layExtent.xmin = layout_l_x; |
| 138 | + layExtent.ymin = layout_r_y; |
| 139 | + layExtent.xmax = layout_r_x; |
| 140 | + layExtent.ymax = layout_l_y; |
| 141 | + return layExtent; |
| 142 | + } |
| 143 | + |
| 144 | + mapboxgl.accessToken = |
| 145 | + "pk.eyJ1Ijoid29ya2luZ2RvZyIsImEiOiJjamQyZmszenczMHRoMzRuczVzaGthbGhnIn0.HTkYTE-R82N3azqscSyHkA"; |
| 146 | + var osm = { |
| 147 | + //来源类型为栅格瓦片 |
| 148 | + type: "raster", |
| 149 | + tiles: [ |
| 150 | + //来源请求地址 |
| 151 | + "http://c.tile.openstreetmap.org/{z}/{x}/{y}.png" |
| 152 | + ], |
| 153 | + //栅格瓦片的分辨率 |
| 154 | + tileSize: 256 |
| 155 | + }; |
| 156 | + |
| 157 | + var map = new mapboxgl.Map({ |
| 158 | + container: "map", |
| 159 | + zoom: 10, |
| 160 | + center: [114.514426, 30.562984], |
| 161 | + style: "mapbox://styles/mapbox/streets-v9", |
| 162 | + preserveDrawingBuffer: true //特别注意，打印的时候必须启动该配置项 |
| 163 | + }); |
| 164 | + |
| 165 | + var modes = MapboxDraw.modes; |
| 166 | + modes.draw_rectangle = DrawRectangle.default; |
| 167 | + var draw = new MapboxDraw({ |
| 168 | + modes: modes, |
| 169 | + displayControlsDefault: false, |
| 170 | + controls: { |
| 171 | + polygon: false, |
| 172 | + trash: false |
| 173 | + } |
| 174 | + }); |
| 175 | + |
| 176 | + map.addControl(draw); |
| 177 | + |
| 178 | + map.on("draw.create", function(e) { |
| 179 | + draw.deleteAll(); |
| 180 | + |
| 181 | + var width_extent_map = 9; |
| 182 | + var height_extent_map = 10; |
| 183 | + var width_extent_layer = 7; |
| 184 | + var height_extent_layer = 8; |
| 185 | + |
| 186 | + if (e.features.length <= 0 || e.features[0].geometry.coordinates <= 0) { |
| 187 | + draw.deleteAll(); |
| 188 | + return; |
| 189 | + } |
| 190 | + |
| 191 | + var point = e.features[0].geometry.coordinates[0][0]; |
| 192 | + |
| 193 | + var xmin = point[0], |
| 194 | + xmax = point[0], |
| 195 | + ymin = point[1], |
| 196 | + ymax = point[1]; |
| 197 | + |
| 198 | + e.features[0].geometry.coordinates[0].forEach(element => { |
| 199 | + if (element[0] <= xmin) xmin = element[0]; |
| 200 | + if (element[0] >= xmax) xmax = element[0]; |
| 201 | + if (element[1] <= ymin) ymin = element[1]; |
| 202 | + if (element[1] >= ymax) ymax = element[1]; |
| 203 | + }); |
| 204 | + |
| 205 | + extent.xmin = xmin; |
| 206 | + extent.ymin = ymin; |
| 207 | + extent.xmax = xmax; |
| 208 | + extent.ymax = ymax; |
| 209 | + |
| 210 | + getRecommendScale(); |
| 211 | + |
| 212 | + var a1 = map.project(new mapboxgl.LngLat(xmin, ymax)); |
| 213 | + var a4 = map.project(new mapboxgl.LngLat(xmax, ymin)); |
| 214 | + |
| 215 | + var mapBounds = map.getBounds(); |
| 216 | + var lefttop = new mapboxgl.LngLat(mapBounds._sw.lng, mapBounds._ne.lat); |
| 217 | + var mapLeftTopPoint = map.project(lefttop); |
| 218 | + |
| 219 | + var startPointX = mapLeftTopPoint.x - a1.x - 7; //得到一个负数 |
| 220 | + var startPointY = mapLeftTopPoint.y - a1.y - 7; //得到一个负数 |
| 221 | + |
| 222 | + var mapParams = {}; |
| 223 | + mapParams.width = parseInt(a4.x - mapLeftTopPoint.x + width_extent_map); // |
| 224 | + mapParams.height = parseInt( |
| 225 | + a4.y - mapLeftTopPoint.y + height_extent_map |
| 226 | + ); |
| 227 | + mapParams.startPointX = startPointX; // ? |
| 228 | + mapParams.startPointY = startPointY; // ? |
| 229 | + |
| 230 | + var layExtent = layoutSetting(); //获取根据比例尺调整后的版面范围 |
| 231 | + |
| 232 | + var b1 = map.project( |
| 233 | + new mapboxgl.LngLat(layExtent.xmin, layExtent.ymax) |
| 234 | + ); //左上 |
| 235 | + var b4 = map.project( |
| 236 | + new mapboxgl.LngLat(layExtent.xmax, layExtent.ymin) |
| 237 | + ); //右下 |
| 238 | + |
| 239 | + var laystartPointX = mapLeftTopPoint.x - b1.x - 9; |
| 240 | + var laystartPointY = mapLeftTopPoint.y - b1.y - 9; |
| 241 | + |
| 242 | + var layParams = {}; |
| 243 | + layParams.width = parseInt( |
| 244 | + b4.x - mapLeftTopPoint.x + width_extent_layer |
| 245 | + ); //输出地图版面宽 |
| 246 | + layParams.height = parseInt( |
| 247 | + b4.y - mapLeftTopPoint.y + height_extent_layer |
| 248 | + ); //输出地图版面高 |
| 249 | + layParams.startPointX = laystartPointX; //输出地图版面的x像素坐标 |
| 250 | + layParams.startPointY = laystartPointY; //输出地图版面的y像素坐标 |
| 251 | + |
| 252 | + //以下参数都是在有layParams的前提下,位置已设置为固定 |
| 253 | + var mapFrameStyleParams = {}; |
| 254 | + mapFrameStyleParams.strokeStyle = "black"; //图像的边框线颜色 |
| 255 | + mapFrameStyleParams.lineWidth = 2; |
| 256 | + |
| 257 | + var titleParams = {}; |
| 258 | + titleParams.font = "30px 微软雅黑"; |
| 259 | + titleParams.textAlign = "center"; |
| 260 | + titleParams.textBaseline = "bottom"; |
| 261 | + titleParams.text = "地图标题"; |
| 262 | + |
| 263 | + var leftTextParams = {}; |
| 264 | + leftTextParams.font = "15px 微软雅黑"; |
| 265 | + leftTextParams.textAlign = "left"; |
| 266 | + leftTextParams.textBaseline = "top"; |
| 267 | + leftTextParams.text = "左下角文字"; |
| 268 | + |
| 269 | + var rightTextParams = {}; |
| 270 | + rightTextParams.font = "15px 微软雅黑"; |
| 271 | + rightTextParams.textAlign = "right"; |
| 272 | + rightTextParams.textBaseline = "top"; |
| 273 | + rightTextParams.text = "右下角文字"; |
| 274 | + |
| 275 | + //width和height为必须参数，其他参数为可选参数(扩展参数) |
| 276 | + setTimeout(function() { |
| 277 | + domtoimage |
| 278 | + .toPng(map.getCanvas(), { |
| 279 | + width: mapParams.width, //输出地图内容的宽 |
| 280 | + height: mapParams.height, //输出地图内容的高 |
| 281 | + startPointX: mapParams.startPointX, //输出地图内容左上角x像素坐标 |
| 282 | + startPointY: mapParams.startPointY, //输出地图内容左上角y像素坐标 |
| 283 | + layParams: layParams, //输出版面参数 |
| 284 | + mapFrameStyleParams: mapFrameStyleParams, //图框参数 |
| 285 | + titleParams: titleParams, //标题参数 |
| 286 | + leftTextParams: leftTextParams, //左下角文字参数 |
| 287 | + rightTextParams: rightTextParams //右下角文字参数 |
| 288 | + }) |
| 289 | + .then(function(dataUrl) { |
| 290 | + var blob = _dataURItoBlob(dataUrl); |
| 291 | + saveAs(blob, "map.png"); |
| 292 | + }) |
| 293 | + .catch(function(err) { |
| 294 | + console.log(err); |
| 295 | + }); |
| 296 | + }, 500); |
| 297 | + }); |
| 298 | + </script> |
| 299 | + </body> |
| 300 | +</html> |
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