ducha-qianduan/node_modules/echarts/lib/component/axisPointer/findPointFromSeries.js

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*/

var zrUtil = require("zrender/lib/core/util");

var modelUtil = require("../../util/model");

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*/

/**
 * @param {Object} finder contains {seriesIndex, dataIndex, dataIndexInside}
 * @param {module:echarts/model/Global} ecModel
 * @return {Object} {point: [x, y], el: ...} point Will not be null.
 */
function _default(finder, ecModel) {
  var point = [];
  var seriesIndex = finder.seriesIndex;
  var seriesModel;

  if (seriesIndex == null || !(seriesModel = ecModel.getSeriesByIndex(seriesIndex))) {
    return {
      point: []
    };
  }

  var data = seriesModel.getData();
  var dataIndex = modelUtil.queryDataIndex(data, finder);

  if (dataIndex == null || dataIndex < 0 || zrUtil.isArray(dataIndex)) {
    return {
      point: []
    };
  }

  var el = data.getItemGraphicEl(dataIndex);
  var coordSys = seriesModel.coordinateSystem;

  if (seriesModel.getTooltipPosition) {
    point = seriesModel.getTooltipPosition(dataIndex) || [];
  } else if (coordSys && coordSys.dataToPoint) {
    point = coordSys.dataToPoint(data.getValues(zrUtil.map(coordSys.dimensions, function (dim) {
      return data.mapDimension(dim);
    }), dataIndex, true)) || [];
  } else if (el) {
    // Use graphic bounding rect
    var rect = el.getBoundingRect().clone();
    rect.applyTransform(el.transform);
    point = [rect.x + rect.width / 2, rect.y + rect.height / 2];
  }

  return {
    point: point,
    el: el
  };
}

module.exports = _default;