src/component/dataZoom/SliderZoomView.js

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define(function (require) {

    var zrUtil = require('zrender/core/util');
    var graphic = require('../../util/graphic');
    var throttle = require('../../util/throttle');
    var DataZoomView = require('./DataZoomView');
    var Rect = graphic.Rect;
    var numberUtil = require('../../util/number');
    var linearMap = numberUtil.linearMap;
    var layout = require('../../util/layout');
    var sliderMove = require('../helper/sliderMove');
    var asc = numberUtil.asc;
    var bind = zrUtil.bind;
    // var mathMax = Math.max;
    var each = zrUtil.each;

    // Constants
    var DEFAULT_LOCATION_EDGE_GAP = 7;
    var DEFAULT_FRAME_BORDER_WIDTH = 1;
    var DEFAULT_FILLER_SIZE = 30;
    var HORIZONTAL = 'horizontal';
    var VERTICAL = 'vertical';
    var LABEL_GAP = 5;
    var SHOW_DATA_SHADOW_SERIES_TYPE = ['line', 'bar', 'candlestick', 'scatter'];

    var SliderZoomView = DataZoomView.extend({

        type: 'dataZoom.slider',

        init: function (ecModel, api) {

            /**
             * @private
             * @type {Object}
             */
            this._displayables = {};

            /**
             * @private
             * @type {string}
             */
            this._orient;

            /**
             * [0, 100]
             * @private
             */
            this._range;

            /**
             * [coord of the first handle, coord of the second handle]
             * @private
             */
            this._handleEnds;

            /**
             * [length, thick]
             * @private
             * @type {Array.<number>}
             */