project/node_modules/echarts/lib/chart/helper/EffectLine.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.
*/


/**
 * AUTO-GENERATED FILE. DO NOT MODIFY.
 */

/*
* 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.
*/
import { __extends } from "tslib";
/**
 * Provide effect for line
 */
import * as graphic from '../../util/graphic.js';
import Line from './Line.js';
import * as zrUtil from 'zrender/lib/core/util.js';
import { createSymbol } from '../../util/symbol.js';
import * as vec2 from 'zrender/lib/core/vector.js';
import * as curveUtil from 'zrender/lib/core/curve.js';
var EffectLine = /** @class */function (_super) {
  __extends(EffectLine, _super);
  function EffectLine(lineData, idx, seriesScope) {
    var _this = _super.call(this) || this;
    _this.add(_this.createLine(lineData, idx, seriesScope));
    _this._updateEffectSymbol(lineData, idx);
    return _this;
  }
  EffectLine.prototype.createLine = function (lineData, idx, seriesScope) {
    return new Line(lineData, idx, seriesScope);
  };
  EffectLine.prototype._updateEffectSymbol = function (lineData, idx) {
    var itemModel = lineData.getItemModel(idx);
    var effectModel = itemModel.getModel('effect');
    var size = effectModel.get('symbolSize');
    var symbolType = effectModel.get('symbol');
    if (!zrUtil.isArray(size)) {
      size = [size, size];
    }
    var lineStyle = lineData.getItemVisual(idx, 'style');
    var color = effectModel.get('color') || lineStyle && lineStyle.stroke;
    var symbol = this.childAt(1);
    if (this._symbolType !== symbolType) {
      // Remove previous
      this.remove(symbol);
      symbol = createSymbol(symbolType, -0.5, -0.5, 1, 1, color);
      symbol.z2 = 100;
      symbol.culling = true;
      this.add(symbol);
    }
    // Symbol may be removed if loop is false
    if (!symbol) {
      return;
    }
    // Shadow color is same with color in default
    symbol.setStyle('shadowColor', color);
    symbol.setStyle(effectModel.getItemStyle(['color']));
    symbol.scaleX = size[0];
    symbol.scaleY = size[1];
    symbol.setColor(color);
    this._symbolType = symbolType;
    this._symbolScale = size;
    this._updateEffectAnimation(lineData, effectModel, idx);
  };
  EffectLine.prototype._updateEffectAnimation = function (lineData, effectModel, idx) {
    var symbol = this.childAt(1);
    if (!symbol) {
      return;
    }
    var points = lineData.getItemLayout(idx);
    var period = effectModel.get('period') * 1000;
    var loop = effectModel.get('loop');
    var roundTrip = effectModel.get('roundTrip');
    var constantSpeed = effectModel.get('constantSpeed');
    var delayExpr = zrUtil.retrieve(effectModel.get('delay'), function (idx) {
      return idx / lineData.count() * period / 3;
    });
    // Ignore when updating
    symbol.ignore = true;
    this._updateAnimationPoints(symbol, points);
    if (constantSpeed > 0) {
      period = this._getLineLength(symbol) / constantSpeed * 1000;
    }
    if (period !== this._period || loop !== this._loop || roundTrip !== this._roundTrip) {
      symbol.stopAnimation();
      var delayNum = void 0;
      if (zrUtil.isFunction(delayExpr)) {
        delayNum = delayExpr(idx);
      } else {
        delayNum = delayExpr;
      }
      if (symbol.__t > 0) {
        delayNum = -period * symbol.__t;
      }
      this._animateSymbol(symbol, period, delayNum, loop, roundTrip);
    }
    this._period = period;
    this._loop = loop;
    this._roundTrip = roundTrip;
  };
  EffectLine.prototype._animateSymbol = function (symbol, period, delayNum, loop, roundTrip) {
    if (period > 0) {
      symbol.__t = 0;
      var self_1 = this;
      var animator = symbol.animate('', loop).when(roundTrip ? period * 2 : period, {
        __t: roundTrip ? 2 : 1
      }).delay(delayNum).during(function () {
        self_1._updateSymbolPosition(symbol);
      });
      if (!loop) {
        animator.done(function () {
          self_1.remove(symbol);
        });
      }
      animator.start();
    }
  };
  EffectLine.prototype._getLineLength = function (symbol) {
    // Not so accurate
    return vec2.dist(symbol.__p1, symbol.__cp1) + vec2.dist(symbol.__cp1, symbol.__p2);
  };
  EffectLine.prototype._updateAnimationPoints = function (symbol, points) {
    symbol.__p1 = points[0];
    symbol.__p2 = points[1];
    symbol.__cp1 = points[2] || [(points[0][0] + points[1][0]) / 2, (points[0][1] + points[1][1]) / 2];
  };
  EffectLine.prototype.updateData = function (lineData, idx, seriesScope) {
    this.childAt(0).updateData(lineData, idx, seriesScope);
    this._updateEffectSymbol(lineData, idx);
  };
  EffectLine.prototype._updateSymbolPosition = function (symbol) {
    var p1 = symbol.__p1;
    var p2 = symbol.__p2;
    var cp1 = symbol.__cp1;
    var t = symbol.__t < 1 ? symbol.__t : 2 - symbol.__t;
    var pos = [symbol.x, symbol.y];
    var lastPos = pos.slice();
    var quadraticAt = curveUtil.quadraticAt;
    var quadraticDerivativeAt = curveUtil.quadraticDerivativeAt;
    pos[0] = quadraticAt(p1[0], cp1[0], p2[0], t);
    pos[1] = quadraticAt(p1[1], cp1[1], p2[1], t);
    // Tangent
    var tx = symbol.__t < 1 ? quadraticDerivativeAt(p1[0], cp1[0], p2[0], t) : quadraticDerivativeAt(p2[0], cp1[0], p1[0], 1 - t);
    var ty = symbol.__t < 1 ? quadraticDerivativeAt(p1[1], cp1[1], p2[1], t) : quadraticDerivativeAt(p2[1], cp1[1], p1[1], 1 - t);
    symbol.rotation = -Math.atan2(ty, tx) - Math.PI / 2;
    // enable continuity trail for 'line', 'rect', 'roundRect' symbolType
    if (this._symbolType === 'line' || this._symbolType === 'rect' || this._symbolType === 'roundRect') {
      if (symbol.__lastT !== undefined && symbol.__lastT < symbol.__t) {
        symbol.scaleY = vec2.dist(lastPos, pos) * 1.05;
        // make sure the last segment render within endPoint
        if (t === 1) {
          pos[0] = lastPos[0] + (pos[0] - lastPos[0]) / 2;
          pos[1] = lastPos[1] + (pos[1] - lastPos[1]) / 2;
        }
      } else if (symbol.__lastT === 1) {
        // After first loop, symbol.__t does NOT start with 0, so connect p1 to pos directly.
        symbol.scaleY = 2 * vec2.dist(p1, pos);
      } else {
        symbol.scaleY = this._symbolScale[1];
      }
    }
    symbol.__lastT = symbol.__t;
    symbol.ignore = false;
    symbol.x = pos[0];
    symbol.y = pos[1];
  };
  EffectLine.prototype.updateLayout = function (lineData, idx) {
    this.childAt(0).updateLayout(lineData, idx);
    var effectModel = lineData.getItemModel(idx).getModel('effect');
    this._updateEffectAnimation(lineData, effectModel, idx);
  };
  return EffectLine;
}(graphic.Group);
export default EffectLine;