[76] | 1 | /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for |
---|
| 2 | * full list of contributors). Published under the Clear BSD license. |
---|
| 3 | * See http://svn.openlayers.org/trunk/openlayers/license.txt for the |
---|
| 4 | * full text of the license. */ |
---|
| 5 | |
---|
| 6 | /** |
---|
| 7 | * @requires OpenLayers/Console.js |
---|
| 8 | */ |
---|
| 9 | |
---|
| 10 | /** |
---|
| 11 | * Class: OpenLayers.Bounds |
---|
| 12 | * Instances of this class represent bounding boxes. Data stored as left, |
---|
| 13 | * bottom, right, top floats. All values are initialized to null, however, |
---|
| 14 | * you should make sure you set them before using the bounds for anything. |
---|
| 15 | * |
---|
| 16 | * Possible use case: |
---|
| 17 | * > bounds = new OpenLayers.Bounds(); |
---|
| 18 | * > bounds.extend(new OpenLayers.LonLat(4,5)); |
---|
| 19 | * > bounds.extend(new OpenLayers.LonLat(5,6)); |
---|
| 20 | * > bounds.toBBOX(); // returns 4,5,5,6 |
---|
| 21 | */ |
---|
| 22 | OpenLayers.Bounds = OpenLayers.Class({ |
---|
| 23 | |
---|
| 24 | /** |
---|
| 25 | * Property: left |
---|
| 26 | * {Number} Minimum horizontal coordinate. |
---|
| 27 | */ |
---|
| 28 | left: null, |
---|
| 29 | |
---|
| 30 | /** |
---|
| 31 | * Property: bottom |
---|
| 32 | * {Number} Minimum vertical coordinate. |
---|
| 33 | */ |
---|
| 34 | bottom: null, |
---|
| 35 | |
---|
| 36 | /** |
---|
| 37 | * Property: right |
---|
| 38 | * {Number} Maximum horizontal coordinate. |
---|
| 39 | */ |
---|
| 40 | right: null, |
---|
| 41 | |
---|
| 42 | /** |
---|
| 43 | * Property: top |
---|
| 44 | * {Number} Maximum vertical coordinate. |
---|
| 45 | */ |
---|
| 46 | top: null, |
---|
| 47 | |
---|
| 48 | /** |
---|
| 49 | * Property: centerLonLat |
---|
| 50 | * {<OpenLayers.LonLat>} A cached center location. This should not be |
---|
| 51 | * accessed directly. Use <getCenterLonLat> instead. |
---|
| 52 | */ |
---|
| 53 | centerLonLat: null, |
---|
| 54 | |
---|
| 55 | /** |
---|
| 56 | * Constructor: OpenLayers.Bounds |
---|
| 57 | * Construct a new bounds object. |
---|
| 58 | * |
---|
| 59 | * Parameters: |
---|
| 60 | * left - {Number} The left bounds of the box. Note that for width |
---|
| 61 | * calculations, this is assumed to be less than the right value. |
---|
| 62 | * bottom - {Number} The bottom bounds of the box. Note that for height |
---|
| 63 | * calculations, this is assumed to be more than the top value. |
---|
| 64 | * right - {Number} The right bounds. |
---|
| 65 | * top - {Number} The top bounds. |
---|
| 66 | */ |
---|
| 67 | initialize: function(left, bottom, right, top) { |
---|
| 68 | if (left != null) { |
---|
| 69 | this.left = OpenLayers.Util.toFloat(left); |
---|
| 70 | } |
---|
| 71 | if (bottom != null) { |
---|
| 72 | this.bottom = OpenLayers.Util.toFloat(bottom); |
---|
| 73 | } |
---|
| 74 | if (right != null) { |
---|
| 75 | this.right = OpenLayers.Util.toFloat(right); |
---|
| 76 | } |
---|
| 77 | if (top != null) { |
---|
| 78 | this.top = OpenLayers.Util.toFloat(top); |
---|
| 79 | } |
---|
| 80 | }, |
---|
| 81 | |
---|
| 82 | /** |
---|
| 83 | * Method: clone |
---|
| 84 | * Create a cloned instance of this bounds. |
---|
| 85 | * |
---|
| 86 | * Returns: |
---|
| 87 | * {<OpenLayers.Bounds>} A fresh copy of the bounds |
---|
| 88 | */ |
---|
| 89 | clone:function() { |
---|
| 90 | return new OpenLayers.Bounds(this.left, this.bottom, |
---|
| 91 | this.right, this.top); |
---|
| 92 | }, |
---|
| 93 | |
---|
| 94 | /** |
---|
| 95 | * Method: equals |
---|
| 96 | * Test a two bounds for equivalence. |
---|
| 97 | * |
---|
| 98 | * Parameters: |
---|
| 99 | * bounds - {<OpenLayers.Bounds>} |
---|
| 100 | * |
---|
| 101 | * Returns: |
---|
| 102 | * {Boolean} The passed-in bounds object has the same left, |
---|
| 103 | * right, top, bottom components as this. Note that if bounds |
---|
| 104 | * passed in is null, returns false. |
---|
| 105 | */ |
---|
| 106 | equals:function(bounds) { |
---|
| 107 | var equals = false; |
---|
| 108 | if (bounds != null) { |
---|
| 109 | equals = ((this.left == bounds.left) && |
---|
| 110 | (this.right == bounds.right) && |
---|
| 111 | (this.top == bounds.top) && |
---|
| 112 | (this.bottom == bounds.bottom)); |
---|
| 113 | } |
---|
| 114 | return equals; |
---|
| 115 | }, |
---|
| 116 | |
---|
| 117 | /** |
---|
| 118 | * APIMethod: toString |
---|
| 119 | * |
---|
| 120 | * Returns: |
---|
| 121 | * {String} String representation of bounds object. |
---|
| 122 | * (ex.<i>"left-bottom=(5,42) right-top=(10,45)"</i>) |
---|
| 123 | */ |
---|
| 124 | toString:function() { |
---|
| 125 | return ( "left-bottom=(" + this.left + "," + this.bottom + ")" |
---|
| 126 | + " right-top=(" + this.right + "," + this.top + ")" ); |
---|
| 127 | }, |
---|
| 128 | |
---|
| 129 | /** |
---|
| 130 | * APIMethod: toArray |
---|
| 131 | * |
---|
| 132 | * Parameters: |
---|
| 133 | * reverseAxisOrder - {Boolean} Should we reverse the axis order? |
---|
| 134 | * |
---|
| 135 | * Returns: |
---|
| 136 | * {Array} array of left, bottom, right, top |
---|
| 137 | */ |
---|
| 138 | toArray: function(reverseAxisOrder) { |
---|
| 139 | if (reverseAxisOrder === true) { |
---|
| 140 | return [this.bottom, this.left, this.top, this.right]; |
---|
| 141 | } else { |
---|
| 142 | return [this.left, this.bottom, this.right, this.top]; |
---|
| 143 | } |
---|
| 144 | }, |
---|
| 145 | |
---|
| 146 | /** |
---|
| 147 | * APIMethod: toBBOX |
---|
| 148 | * |
---|
| 149 | * Parameters: |
---|
| 150 | * decimal - {Integer} How many significant digits in the bbox coords? |
---|
| 151 | * Default is 6 |
---|
| 152 | * reverseAxisOrder - {Boolean} Should we reverse the axis order? |
---|
| 153 | * |
---|
| 154 | * Returns: |
---|
| 155 | * {String} Simple String representation of bounds object. |
---|
| 156 | * (ex. <i>"5,42,10,45"</i>) |
---|
| 157 | */ |
---|
| 158 | toBBOX:function(decimal, reverseAxisOrder) { |
---|
| 159 | if (decimal== null) { |
---|
| 160 | decimal = 6; |
---|
| 161 | } |
---|
| 162 | var mult = Math.pow(10, decimal); |
---|
| 163 | var xmin = Math.round(this.left * mult) / mult; |
---|
| 164 | var ymin = Math.round(this.bottom * mult) / mult; |
---|
| 165 | var xmax = Math.round(this.right * mult) / mult; |
---|
| 166 | var ymax = Math.round(this.top * mult) / mult; |
---|
| 167 | if (reverseAxisOrder === true) { |
---|
| 168 | return ymin + "," + xmin + "," + ymax + "," + xmax; |
---|
| 169 | } else { |
---|
| 170 | return xmin + "," + ymin + "," + xmax + "," + ymax; |
---|
| 171 | } |
---|
| 172 | }, |
---|
| 173 | |
---|
| 174 | /** |
---|
| 175 | * APIMethod: toGeometry |
---|
| 176 | * Create a new polygon geometry based on this bounds. |
---|
| 177 | * |
---|
| 178 | * Returns: |
---|
| 179 | * {<OpenLayers.Geometry.Polygon>} A new polygon with the coordinates |
---|
| 180 | * of this bounds. |
---|
| 181 | */ |
---|
| 182 | toGeometry: function() { |
---|
| 183 | return new OpenLayers.Geometry.Polygon([ |
---|
| 184 | new OpenLayers.Geometry.LinearRing([ |
---|
| 185 | new OpenLayers.Geometry.Point(this.left, this.bottom), |
---|
| 186 | new OpenLayers.Geometry.Point(this.right, this.bottom), |
---|
| 187 | new OpenLayers.Geometry.Point(this.right, this.top), |
---|
| 188 | new OpenLayers.Geometry.Point(this.left, this.top) |
---|
| 189 | ]) |
---|
| 190 | ]); |
---|
| 191 | }, |
---|
| 192 | |
---|
| 193 | /** |
---|
| 194 | * APIMethod: getWidth |
---|
| 195 | * |
---|
| 196 | * Returns: |
---|
| 197 | * {Float} The width of the bounds |
---|
| 198 | */ |
---|
| 199 | getWidth:function() { |
---|
| 200 | return (this.right - this.left); |
---|
| 201 | }, |
---|
| 202 | |
---|
| 203 | /** |
---|
| 204 | * APIMethod: getHeight |
---|
| 205 | * |
---|
| 206 | * Returns: |
---|
| 207 | * {Float} The height of the bounds (top minus bottom). |
---|
| 208 | */ |
---|
| 209 | getHeight:function() { |
---|
| 210 | return (this.top - this.bottom); |
---|
| 211 | }, |
---|
| 212 | |
---|
| 213 | /** |
---|
| 214 | * APIMethod: getSize |
---|
| 215 | * |
---|
| 216 | * Returns: |
---|
| 217 | * {<OpenLayers.Size>} The size of the box. |
---|
| 218 | */ |
---|
| 219 | getSize:function() { |
---|
| 220 | return new OpenLayers.Size(this.getWidth(), this.getHeight()); |
---|
| 221 | }, |
---|
| 222 | |
---|
| 223 | /** |
---|
| 224 | * APIMethod: getCenterPixel |
---|
| 225 | * |
---|
| 226 | * Returns: |
---|
| 227 | * {<OpenLayers.Pixel>} The center of the bounds in pixel space. |
---|
| 228 | */ |
---|
| 229 | getCenterPixel:function() { |
---|
| 230 | return new OpenLayers.Pixel( (this.left + this.right) / 2, |
---|
| 231 | (this.bottom + this.top) / 2); |
---|
| 232 | }, |
---|
| 233 | |
---|
| 234 | /** |
---|
| 235 | * APIMethod: getCenterLonLat |
---|
| 236 | * |
---|
| 237 | * Returns: |
---|
| 238 | * {<OpenLayers.LonLat>} The center of the bounds in map space. |
---|
| 239 | */ |
---|
| 240 | getCenterLonLat:function() { |
---|
| 241 | if(!this.centerLonLat) { |
---|
| 242 | this.centerLonLat = new OpenLayers.LonLat( |
---|
| 243 | (this.left + this.right) / 2, (this.bottom + this.top) / 2 |
---|
| 244 | ); |
---|
| 245 | } |
---|
| 246 | return this.centerLonLat; |
---|
| 247 | }, |
---|
| 248 | |
---|
| 249 | /** |
---|
| 250 | * Method: scale |
---|
| 251 | * Scales the bounds around a pixel or lonlat. Note that the new |
---|
| 252 | * bounds may return non-integer properties, even if a pixel |
---|
| 253 | * is passed. |
---|
| 254 | * |
---|
| 255 | * Parameters: |
---|
| 256 | * ratio - {Float} |
---|
| 257 | * origin - {<OpenLayers.Pixel> or <OpenLayers.LonLat>} |
---|
| 258 | * Default is center. |
---|
| 259 | * |
---|
| 260 | * Returns: |
---|
| 261 | * {<OpenLayers.Bound>} A new bounds that is scaled by ratio |
---|
| 262 | * from origin. |
---|
| 263 | */ |
---|
| 264 | |
---|
| 265 | scale: function(ratio, origin){ |
---|
| 266 | if(origin == null){ |
---|
| 267 | origin = this.getCenterLonLat(); |
---|
| 268 | } |
---|
| 269 | |
---|
| 270 | var origx,origy; |
---|
| 271 | |
---|
| 272 | // get origin coordinates |
---|
| 273 | if(origin.CLASS_NAME == "OpenLayers.LonLat"){ |
---|
| 274 | origx = origin.lon; |
---|
| 275 | origy = origin.lat; |
---|
| 276 | } else { |
---|
| 277 | origx = origin.x; |
---|
| 278 | origy = origin.y; |
---|
| 279 | } |
---|
| 280 | |
---|
| 281 | var left = (this.left - origx) * ratio + origx; |
---|
| 282 | var bottom = (this.bottom - origy) * ratio + origy; |
---|
| 283 | var right = (this.right - origx) * ratio + origx; |
---|
| 284 | var top = (this.top - origy) * ratio + origy; |
---|
| 285 | |
---|
| 286 | return new OpenLayers.Bounds(left, bottom, right, top); |
---|
| 287 | }, |
---|
| 288 | |
---|
| 289 | /** |
---|
| 290 | * APIMethod: add |
---|
| 291 | * |
---|
| 292 | * Parameters: |
---|
| 293 | * x - {Float} |
---|
| 294 | * y - {Float} |
---|
| 295 | * |
---|
| 296 | * Returns: |
---|
| 297 | * {<OpenLayers.Bounds>} A new bounds whose coordinates are the same as |
---|
| 298 | * this, but shifted by the passed-in x and y values. |
---|
| 299 | */ |
---|
| 300 | add:function(x, y) { |
---|
| 301 | if ( (x == null) || (y == null) ) { |
---|
| 302 | var msg = OpenLayers.i18n("boundsAddError"); |
---|
| 303 | OpenLayers.Console.error(msg); |
---|
| 304 | return null; |
---|
| 305 | } |
---|
| 306 | return new OpenLayers.Bounds(this.left + x, this.bottom + y, |
---|
| 307 | this.right + x, this.top + y); |
---|
| 308 | }, |
---|
| 309 | |
---|
| 310 | /** |
---|
| 311 | * APIMethod: extend |
---|
| 312 | * Extend the bounds to include the point, lonlat, or bounds specified. |
---|
| 313 | * Note, this function assumes that left < right and bottom < top. |
---|
| 314 | * |
---|
| 315 | * Parameters: |
---|
| 316 | * object - {Object} Can be LonLat, Point, or Bounds |
---|
| 317 | */ |
---|
| 318 | extend:function(object) { |
---|
| 319 | var bounds = null; |
---|
| 320 | if (object) { |
---|
| 321 | // clear cached center location |
---|
| 322 | switch(object.CLASS_NAME) { |
---|
| 323 | case "OpenLayers.LonLat": |
---|
| 324 | bounds = new OpenLayers.Bounds(object.lon, object.lat, |
---|
| 325 | object.lon, object.lat); |
---|
| 326 | break; |
---|
| 327 | case "OpenLayers.Geometry.Point": |
---|
| 328 | bounds = new OpenLayers.Bounds(object.x, object.y, |
---|
| 329 | object.x, object.y); |
---|
| 330 | break; |
---|
| 331 | |
---|
| 332 | case "OpenLayers.Bounds": |
---|
| 333 | bounds = object; |
---|
| 334 | break; |
---|
| 335 | } |
---|
| 336 | |
---|
| 337 | if (bounds) { |
---|
| 338 | this.centerLonLat = null; |
---|
| 339 | if ( (this.left == null) || (bounds.left < this.left)) { |
---|
| 340 | this.left = bounds.left; |
---|
| 341 | } |
---|
| 342 | if ( (this.bottom == null) || (bounds.bottom < this.bottom) ) { |
---|
| 343 | this.bottom = bounds.bottom; |
---|
| 344 | } |
---|
| 345 | if ( (this.right == null) || (bounds.right > this.right) ) { |
---|
| 346 | this.right = bounds.right; |
---|
| 347 | } |
---|
| 348 | if ( (this.top == null) || (bounds.top > this.top) ) { |
---|
| 349 | this.top = bounds.top; |
---|
| 350 | } |
---|
| 351 | } |
---|
| 352 | } |
---|
| 353 | }, |
---|
| 354 | |
---|
| 355 | /** |
---|
| 356 | * APIMethod: containsLonLat |
---|
| 357 | * |
---|
| 358 | * Parameters: |
---|
| 359 | * ll - {<OpenLayers.LonLat>} |
---|
| 360 | * inclusive - {Boolean} Whether or not to include the border. |
---|
| 361 | * Default is true. |
---|
| 362 | * |
---|
| 363 | * Returns: |
---|
| 364 | * {Boolean} The passed-in lonlat is within this bounds. |
---|
| 365 | */ |
---|
| 366 | containsLonLat:function(ll, inclusive) { |
---|
| 367 | return this.contains(ll.lon, ll.lat, inclusive); |
---|
| 368 | }, |
---|
| 369 | |
---|
| 370 | /** |
---|
| 371 | * APIMethod: containsPixel |
---|
| 372 | * |
---|
| 373 | * Parameters: |
---|
| 374 | * px - {<OpenLayers.Pixel>} |
---|
| 375 | * inclusive - {Boolean} Whether or not to include the border. Default is |
---|
| 376 | * true. |
---|
| 377 | * |
---|
| 378 | * Returns: |
---|
| 379 | * {Boolean} The passed-in pixel is within this bounds. |
---|
| 380 | */ |
---|
| 381 | containsPixel:function(px, inclusive) { |
---|
| 382 | return this.contains(px.x, px.y, inclusive); |
---|
| 383 | }, |
---|
| 384 | |
---|
| 385 | /** |
---|
| 386 | * APIMethod: contains |
---|
| 387 | * |
---|
| 388 | * Parameters: |
---|
| 389 | * x - {Float} |
---|
| 390 | * y - {Float} |
---|
| 391 | * inclusive - {Boolean} Whether or not to include the border. Default is |
---|
| 392 | * true. |
---|
| 393 | * |
---|
| 394 | * Returns: |
---|
| 395 | * {Boolean} Whether or not the passed-in coordinates are within this |
---|
| 396 | * bounds. |
---|
| 397 | */ |
---|
| 398 | contains:function(x, y, inclusive) { |
---|
| 399 | //set default |
---|
| 400 | if (inclusive == null) { |
---|
| 401 | inclusive = true; |
---|
| 402 | } |
---|
| 403 | |
---|
| 404 | if (x == null || y == null) { |
---|
| 405 | return false; |
---|
| 406 | } |
---|
| 407 | |
---|
| 408 | x = OpenLayers.Util.toFloat(x); |
---|
| 409 | y = OpenLayers.Util.toFloat(y); |
---|
| 410 | |
---|
| 411 | var contains = false; |
---|
| 412 | if (inclusive) { |
---|
| 413 | contains = ((x >= this.left) && (x <= this.right) && |
---|
| 414 | (y >= this.bottom) && (y <= this.top)); |
---|
| 415 | } else { |
---|
| 416 | contains = ((x > this.left) && (x < this.right) && |
---|
| 417 | (y > this.bottom) && (y < this.top)); |
---|
| 418 | } |
---|
| 419 | return contains; |
---|
| 420 | }, |
---|
| 421 | |
---|
| 422 | /** |
---|
| 423 | * APIMethod: intersectsBounds |
---|
| 424 | * Determine whether the target bounds intersects this bounds. Bounds are |
---|
| 425 | * considered intersecting if any of their edges intersect or if one |
---|
| 426 | * bounds contains the other. |
---|
| 427 | * |
---|
| 428 | * Parameters: |
---|
| 429 | * bounds - {<OpenLayers.Bounds>} The target bounds. |
---|
| 430 | * inclusive - {Boolean} Treat coincident borders as intersecting. Default |
---|
| 431 | * is true. If false, bounds that do not overlap but only touch at the |
---|
| 432 | * border will not be considered as intersecting. |
---|
| 433 | * |
---|
| 434 | * Returns: |
---|
| 435 | * {Boolean} The passed-in bounds object intersects this bounds. |
---|
| 436 | */ |
---|
| 437 | intersectsBounds:function(bounds, inclusive) { |
---|
| 438 | if (inclusive == null) { |
---|
| 439 | inclusive = true; |
---|
| 440 | } |
---|
| 441 | var intersects = false; |
---|
| 442 | var mightTouch = ( |
---|
| 443 | this.left == bounds.right || |
---|
| 444 | this.right == bounds.left || |
---|
| 445 | this.top == bounds.bottom || |
---|
| 446 | this.bottom == bounds.top |
---|
| 447 | ); |
---|
| 448 | |
---|
| 449 | // if the two bounds only touch at an edge, and inclusive is false, |
---|
| 450 | // then the bounds don't *really* intersect. |
---|
| 451 | if (inclusive || !mightTouch) { |
---|
| 452 | // otherwise, if one of the boundaries even partially contains another, |
---|
| 453 | // inclusive of the edges, then they do intersect. |
---|
| 454 | var inBottom = ( |
---|
| 455 | ((bounds.bottom >= this.bottom) && (bounds.bottom <= this.top)) || |
---|
| 456 | ((this.bottom >= bounds.bottom) && (this.bottom <= bounds.top)) |
---|
| 457 | ); |
---|
| 458 | var inTop = ( |
---|
| 459 | ((bounds.top >= this.bottom) && (bounds.top <= this.top)) || |
---|
| 460 | ((this.top > bounds.bottom) && (this.top < bounds.top)) |
---|
| 461 | ); |
---|
| 462 | var inLeft = ( |
---|
| 463 | ((bounds.left >= this.left) && (bounds.left <= this.right)) || |
---|
| 464 | ((this.left >= bounds.left) && (this.left <= bounds.right)) |
---|
| 465 | ); |
---|
| 466 | var inRight = ( |
---|
| 467 | ((bounds.right >= this.left) && (bounds.right <= this.right)) || |
---|
| 468 | ((this.right >= bounds.left) && (this.right <= bounds.right)) |
---|
| 469 | ); |
---|
| 470 | intersects = ((inBottom || inTop) && (inLeft || inRight)); |
---|
| 471 | } |
---|
| 472 | return intersects; |
---|
| 473 | }, |
---|
| 474 | |
---|
| 475 | /** |
---|
| 476 | * APIMethod: containsBounds |
---|
| 477 | * Determine whether the target bounds is contained within this bounds. |
---|
| 478 | * |
---|
| 479 | * bounds - {<OpenLayers.Bounds>} The target bounds. |
---|
| 480 | * partial - {Boolean} If any of the target corners is within this bounds |
---|
| 481 | * consider the bounds contained. Default is false. If false, the |
---|
| 482 | * entire target bounds must be contained within this bounds. |
---|
| 483 | * inclusive - {Boolean} Treat shared edges as contained. Default is |
---|
| 484 | * true. |
---|
| 485 | * |
---|
| 486 | * Returns: |
---|
| 487 | * {Boolean} The passed-in bounds object is contained within this bounds. |
---|
| 488 | */ |
---|
| 489 | containsBounds:function(bounds, partial, inclusive) { |
---|
| 490 | if (partial == null) { |
---|
| 491 | partial = false; |
---|
| 492 | } |
---|
| 493 | if (inclusive == null) { |
---|
| 494 | inclusive = true; |
---|
| 495 | } |
---|
| 496 | var bottomLeft = this.contains(bounds.left, bounds.bottom, inclusive); |
---|
| 497 | var bottomRight = this.contains(bounds.right, bounds.bottom, inclusive); |
---|
| 498 | var topLeft = this.contains(bounds.left, bounds.top, inclusive); |
---|
| 499 | var topRight = this.contains(bounds.right, bounds.top, inclusive); |
---|
| 500 | |
---|
| 501 | return (partial) ? (bottomLeft || bottomRight || topLeft || topRight) |
---|
| 502 | : (bottomLeft && bottomRight && topLeft && topRight); |
---|
| 503 | }, |
---|
| 504 | |
---|
| 505 | /** |
---|
| 506 | * APIMethod: determineQuadrant |
---|
| 507 | * |
---|
| 508 | * Parameters: |
---|
| 509 | * lonlat - {<OpenLayers.LonLat>} |
---|
| 510 | * |
---|
| 511 | * Returns: |
---|
| 512 | * {String} The quadrant ("br" "tr" "tl" "bl") of the bounds in which the |
---|
| 513 | * coordinate lies. |
---|
| 514 | */ |
---|
| 515 | determineQuadrant: function(lonlat) { |
---|
| 516 | |
---|
| 517 | var quadrant = ""; |
---|
| 518 | var center = this.getCenterLonLat(); |
---|
| 519 | |
---|
| 520 | quadrant += (lonlat.lat < center.lat) ? "b" : "t"; |
---|
| 521 | quadrant += (lonlat.lon < center.lon) ? "l" : "r"; |
---|
| 522 | |
---|
| 523 | return quadrant; |
---|
| 524 | }, |
---|
| 525 | |
---|
| 526 | /** |
---|
| 527 | * APIMethod: transform |
---|
| 528 | * Transform the Bounds object from source to dest. |
---|
| 529 | * |
---|
| 530 | * Parameters: |
---|
| 531 | * source - {<OpenLayers.Projection>} Source projection. |
---|
| 532 | * dest - {<OpenLayers.Projection>} Destination projection. |
---|
| 533 | * |
---|
| 534 | * Returns: |
---|
| 535 | * {<OpenLayers.Bounds>} Itself, for use in chaining operations. |
---|
| 536 | */ |
---|
| 537 | transform: function(source, dest) { |
---|
| 538 | // clear cached center location |
---|
| 539 | this.centerLonLat = null; |
---|
| 540 | var ll = OpenLayers.Projection.transform( |
---|
| 541 | {'x': this.left, 'y': this.bottom}, source, dest); |
---|
| 542 | var lr = OpenLayers.Projection.transform( |
---|
| 543 | {'x': this.right, 'y': this.bottom}, source, dest); |
---|
| 544 | var ul = OpenLayers.Projection.transform( |
---|
| 545 | {'x': this.left, 'y': this.top}, source, dest); |
---|
| 546 | var ur = OpenLayers.Projection.transform( |
---|
| 547 | {'x': this.right, 'y': this.top}, source, dest); |
---|
| 548 | this.left = Math.min(ll.x, ul.x); |
---|
| 549 | this.bottom = Math.min(ll.y, lr.y); |
---|
| 550 | this.right = Math.max(lr.x, ur.x); |
---|
| 551 | this.top = Math.max(ul.y, ur.y); |
---|
| 552 | return this; |
---|
| 553 | }, |
---|
| 554 | |
---|
| 555 | /** |
---|
| 556 | * APIMethod: wrapDateLine |
---|
| 557 | * |
---|
| 558 | * Parameters: |
---|
| 559 | * maxExtent - {<OpenLayers.Bounds>} |
---|
| 560 | * options - {Object} Some possible options are: |
---|
| 561 | * leftTolerance - {float} Allow for a margin of error |
---|
| 562 | * with the 'left' value of this |
---|
| 563 | * bound. |
---|
| 564 | * Default is 0. |
---|
| 565 | * rightTolerance - {float} Allow for a margin of error |
---|
| 566 | * with the 'right' value of |
---|
| 567 | * this bound. |
---|
| 568 | * Default is 0. |
---|
| 569 | * |
---|
| 570 | * Returns: |
---|
| 571 | * {<OpenLayers.Bounds>} A copy of this bounds, but wrapped around the |
---|
| 572 | * "dateline" (as specified by the borders of |
---|
| 573 | * maxExtent). Note that this function only returns |
---|
| 574 | * a different bounds value if this bounds is |
---|
| 575 | * *entirely* outside of the maxExtent. If this |
---|
| 576 | * bounds straddles the dateline (is part in/part |
---|
| 577 | * out of maxExtent), the returned bounds will be |
---|
| 578 | * merely a copy of this one. |
---|
| 579 | */ |
---|
| 580 | wrapDateLine: function(maxExtent, options) { |
---|
| 581 | options = options || {}; |
---|
| 582 | |
---|
| 583 | var leftTolerance = options.leftTolerance || 0; |
---|
| 584 | var rightTolerance = options.rightTolerance || 0; |
---|
| 585 | |
---|
| 586 | var newBounds = this.clone(); |
---|
| 587 | |
---|
| 588 | if (maxExtent) { |
---|
| 589 | |
---|
| 590 | //shift right? |
---|
| 591 | while ( newBounds.left < maxExtent.left && |
---|
| 592 | (newBounds.right - rightTolerance) <= maxExtent.left ) { |
---|
| 593 | newBounds = newBounds.add(maxExtent.getWidth(), 0); |
---|
| 594 | } |
---|
| 595 | |
---|
| 596 | //shift left? |
---|
| 597 | while ( (newBounds.left + leftTolerance) >= maxExtent.right && |
---|
| 598 | newBounds.right > maxExtent.right ) { |
---|
| 599 | newBounds = newBounds.add(-maxExtent.getWidth(), 0); |
---|
| 600 | } |
---|
| 601 | } |
---|
| 602 | |
---|
| 603 | return newBounds; |
---|
| 604 | }, |
---|
| 605 | |
---|
| 606 | CLASS_NAME: "OpenLayers.Bounds" |
---|
| 607 | }); |
---|
| 608 | |
---|
| 609 | /** |
---|
| 610 | * APIFunction: fromString |
---|
| 611 | * Alternative constructor that builds a new OpenLayers.Bounds from a |
---|
| 612 | * parameter string |
---|
| 613 | * |
---|
| 614 | * Parameters: |
---|
| 615 | * str - {String}Comma-separated bounds string. (ex. <i>"5,42,10,45"</i>) |
---|
| 616 | * |
---|
| 617 | * Returns: |
---|
| 618 | * {<OpenLayers.Bounds>} New bounds object built from the |
---|
| 619 | * passed-in String. |
---|
| 620 | */ |
---|
| 621 | OpenLayers.Bounds.fromString = function(str) { |
---|
| 622 | var bounds = str.split(","); |
---|
| 623 | return OpenLayers.Bounds.fromArray(bounds); |
---|
| 624 | }; |
---|
| 625 | |
---|
| 626 | /** |
---|
| 627 | * APIFunction: fromArray |
---|
| 628 | * Alternative constructor that builds a new OpenLayers.Bounds |
---|
| 629 | * from an array |
---|
| 630 | * |
---|
| 631 | * Parameters: |
---|
| 632 | * bbox - {Array(Float)} Array of bounds values (ex. <i>[5,42,10,45]</i>) |
---|
| 633 | * |
---|
| 634 | * Returns: |
---|
| 635 | * {<OpenLayers.Bounds>} New bounds object built from the passed-in Array. |
---|
| 636 | */ |
---|
| 637 | OpenLayers.Bounds.fromArray = function(bbox) { |
---|
| 638 | return new OpenLayers.Bounds(parseFloat(bbox[0]), |
---|
| 639 | parseFloat(bbox[1]), |
---|
| 640 | parseFloat(bbox[2]), |
---|
| 641 | parseFloat(bbox[3])); |
---|
| 642 | }; |
---|
| 643 | |
---|
| 644 | /** |
---|
| 645 | * APIFunction: fromSize |
---|
| 646 | * Alternative constructor that builds a new OpenLayers.Bounds |
---|
| 647 | * from a size |
---|
| 648 | * |
---|
| 649 | * Parameters: |
---|
| 650 | * size - {<OpenLayers.Size>} |
---|
| 651 | * |
---|
| 652 | * Returns: |
---|
| 653 | * {<OpenLayers.Bounds>} New bounds object built from the passed-in size. |
---|
| 654 | */ |
---|
| 655 | OpenLayers.Bounds.fromSize = function(size) { |
---|
| 656 | return new OpenLayers.Bounds(0, |
---|
| 657 | size.h, |
---|
| 658 | size.w, |
---|
| 659 | 0); |
---|
| 660 | }; |
---|
| 661 | |
---|
| 662 | /** |
---|
| 663 | * Function: oppositeQuadrant |
---|
| 664 | * Get the opposite quadrant for a given quadrant string. |
---|
| 665 | * |
---|
| 666 | * Parameters: |
---|
| 667 | * quadrant - {String} two character quadrant shortstring |
---|
| 668 | * |
---|
| 669 | * Returns: |
---|
| 670 | * {String} The opposing quadrant ("br" "tr" "tl" "bl"). For Example, if |
---|
| 671 | * you pass in "bl" it returns "tr", if you pass in "br" it |
---|
| 672 | * returns "tl", etc. |
---|
| 673 | */ |
---|
| 674 | OpenLayers.Bounds.oppositeQuadrant = function(quadrant) { |
---|
| 675 | var opp = ""; |
---|
| 676 | |
---|
| 677 | opp += (quadrant.charAt(0) == 't') ? 'b' : 't'; |
---|
| 678 | opp += (quadrant.charAt(1) == 'l') ? 'r' : 'l'; |
---|
| 679 | |
---|
| 680 | return opp; |
---|
| 681 | }; |
---|