medical/node_modules/echarts/lib/chart/helper/LargeSymbolDraw.js

var graphic = require("../../util/graphic");

var _symbol = require("../../util/symbol");

var createSymbol = _symbol.createSymbol;
// TODO Batch by color
var LargeSymbolPath = graphic.extendShape({
  shape: {
    points: null,
    sizes: null
  },
  symbolProxy: null,
  buildPath: function (path, shape) {
    var points = shape.points;
    var sizes = shape.sizes;
    var symbolProxy = this.symbolProxy;
    var symbolProxyShape = symbolProxy.shape;

    for (var i = 0; i < points.length; i++) {
      var pt = points[i];

      if (isNaN(pt[0]) || isNaN(pt[1])) {
        continue;
      }

      var size = sizes[i];

      if (size[0] < 4) {
        // Optimize for small symbol
        path.rect(pt[0] - size[0] / 2, pt[1] - size[1] / 2, size[0], size[1]);
      } else {
        symbolProxyShape.x = pt[0] - size[0] / 2;
        symbolProxyShape.y = pt[1] - size[1] / 2;
        symbolProxyShape.width = size[0];
        symbolProxyShape.height = size[1];
        symbolProxy.buildPath(path, symbolProxyShape, true);
      }
    }
  },
  findDataIndex: function (x, y) {
    var shape = this.shape;
    var points = shape.points;
    var sizes = shape.sizes; // Not consider transform
    // Treat each element as a rect
    // top down traverse

    for (var i = points.length - 1; i >= 0; i--) {
      var pt = points[i];
      var size = sizes[i];
      var x0 = pt[0] - size[0] / 2;
      var y0 = pt[1] - size[1] / 2;

      if (x >= x0 && y >= y0 && x <= x0 + size[0] && y <= y0 + size[1]) {
        // i is dataIndex
        return i;
      }
    }

    return -1;
  }
});

function LargeSymbolDraw() {
  this.group = new graphic.Group();
  this._symbolEl = new LargeSymbolPath({// rectHover: true,
    // cursor: 'default'
  });
}

var largeSymbolProto = LargeSymbolDraw.prototype;
/**
 * Update symbols draw by new data
 * @param {module:echarts/data/List} data
 */

largeSymbolProto.updateData = function (data) {
  this.group.removeAll();
  var symbolEl = this._symbolEl;
  var seriesModel = data.hostModel;
  symbolEl.setShape({
    points: data.mapArray(data.getItemLayout),
    sizes: data.mapArray(function (idx) {
      var size = data.getItemVisual(idx, 'symbolSize');

      if (!(size instanceof Array)) {
        size = [size, size];
      }

      return size;
    })
  }); // Create symbolProxy to build path for each data

  symbolEl.symbolProxy = createSymbol(data.getVisual('symbol'), 0, 0, 0, 0); // Use symbolProxy setColor method

  symbolEl.setColor = symbolEl.symbolProxy.setColor;
  symbolEl.useStyle(seriesModel.getModel('itemStyle.normal').getItemStyle(['color']));
  var visualColor = data.getVisual('color');

  if (visualColor) {
    symbolEl.setColor(visualColor);
  } // Enable tooltip
  // PENDING May have performance issue when path is extremely large


  symbolEl.seriesIndex = seriesModel.seriesIndex;
  symbolEl.on('mousemove', function (e) {
    symbolEl.dataIndex = null;
    var dataIndex = symbolEl.findDataIndex(e.offsetX, e.offsetY);

    if (dataIndex >= 0) {
      // Provide dataIndex for tooltip
      symbolEl.dataIndex = dataIndex;
    }
  }); // Add back

  this.group.add(symbolEl);
};

largeSymbolProto.updateLayout = function (seriesModel) {
  var data = seriesModel.getData();

  this._symbolEl.setShape({
    points: data.mapArray(data.getItemLayout)
  });
};

largeSymbolProto.remove = function () {
  this.group.removeAll();
};

var _default = LargeSymbolDraw;
module.exports = _default;