* @function Label.prototype.calculateLabelBounds * @description 获得标签要素的最终范围。 * @param {FeatureVector} feature - 需要计算范围的标签要素数。 * @param {Object} loc - 标签位置，例如：{"x":1,"y":1}。 * @returns {Array. } 四边形节点数组。例如：[{"x":1,"y":1},{"x":3,"y":1},{"x":6,"y":4},{"x":2,"y":10},{"x":1,"y
(feature, loc)
| 480 | * @returns {Array.<Object>} 四边形节点数组。例如：[{"x":1,"y":1},{"x":3,"y":1},{"x":6,"y":4},{"x":2,"y":10},{"x":1,"y":1}]。 |
| 481 | */ |
| 482 | calculateLabelBounds(feature, loc) { |
| 483 | var geoText = feature.geometry; |
| 484 | |
| 485 | //标签范围（未旋转前） |
| 486 | var labB = null; |
| 487 | var labelInfo = null; |
| 488 | //获取bounds的方式 |
| 489 | if (this.getPxBoundsMode == 0) { |
| 490 | labB = geoText.getLabelPxBoundsByText(loc, feature.style); |
| 491 | } else if (this.getPxBoundsMode === 1) { |
| 492 | //canvas |
| 493 | labelInfo = this.getLabelInfo(feature.geometry.getCentroid(), feature.style); |
| 494 | labB = geoText.getLabelPxBoundsByLabel(loc, labelInfo.w, labelInfo.h, feature.style); |
| 495 | } else { |
| 496 | return null; |
| 497 | } |
| 498 | |
| 499 | //旋转Bounds |
| 500 | var boundsQuad = []; |
| 501 | if ((feature.style.labelRotation % 180) == 0) { |
| 502 | boundsQuad = [{ |
| 503 | "x": labB.left, |
| 504 | "y": labB.top |
| 505 | }, |
| 506 | { |
| 507 | "x": labB.right, |
| 508 | "y": labB.top |
| 509 | }, |
| 510 | { |
| 511 | "x": labB.right, |
| 512 | "y": labB.bottom |
| 513 | }, |
| 514 | { |
| 515 | "x": labB.left, |
| 516 | "y": labB.bottom |
| 517 | }, |
| 518 | { |
| 519 | "x": labB.left, |
| 520 | "y": labB.top |
| 521 | } |
| 522 | ]; |
| 523 | } else { |
| 524 | boundsQuad = this.rotationBounds(labB, loc, feature.style.labelRotation); |
| 525 | } |
| 526 | |
| 527 | //重置GeoText的bounds |
| 528 | geoText.bounds = new Bounds(boundsQuad[1].x, boundsQuad[3].y, boundsQuad[2].x, boundsQuad[4].y); |
| 529 | return boundsQuad; |
| 530 | } |
| 531 | |
| 532 | /** |
| 533 | * @function Label.prototype.calculateLabelBounds2 |
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