lepu-test-platform-web/node_modules/echarts/lib/chart/helper/EffectLine.js

236 lines
7.1 KiB
JavaScript

/*
* 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 graphic = require("../../util/graphic");
var Line = require("./Line");
var zrUtil = require("zrender/lib/core/util");
var _symbol = require("../../util/symbol");
var createSymbol = _symbol.createSymbol;
var vec2 = require("zrender/lib/core/vector");
var curveUtil = require("zrender/lib/core/curve");
/*
* 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.
*/
/**
* Provide effect for line
* @module echarts/chart/helper/EffectLine
*/
/**
* @constructor
* @extends {module:zrender/graphic/Group}
* @alias {module:echarts/chart/helper/Line}
*/
function EffectLine(lineData, idx, seriesScope) {
graphic.Group.call(this);
this.add(this.createLine(lineData, idx, seriesScope));
this._updateEffectSymbol(lineData, idx);
}
var effectLineProto = EffectLine.prototype;
effectLineProto.createLine = function (lineData, idx, seriesScope) {
return new Line(lineData, idx, seriesScope);
};
effectLineProto._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 color = effectModel.get('color') || lineData.getItemVisual(idx, 'color');
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.attr('scale', size);
symbol.setColor(color);
symbol.attr('scale', size);
this._symbolType = symbolType;
this._symbolScale = size;
this._updateEffectAnimation(lineData, effectModel, idx);
};
effectLineProto._updateEffectAnimation = function (lineData, effectModel, idx) {
var symbol = this.childAt(1);
if (!symbol) {
return;
}
var self = this;
var points = lineData.getItemLayout(idx);
var period = effectModel.get('period') * 1000;
var loop = effectModel.get('loop');
var constantSpeed = effectModel.get('constantSpeed');
var delayExpr = zrUtil.retrieve(effectModel.get('delay'), function (idx) {
return idx / lineData.count() * period / 3;
});
var isDelayFunc = typeof delayExpr === 'function'; // 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) {
symbol.stopAnimation();
var delay = delayExpr;
if (isDelayFunc) {
delay = delayExpr(idx);
}
if (symbol.__t > 0) {
delay = -period * symbol.__t;
}
symbol.__t = 0;
var animator = symbol.animate('', loop).when(period, {
__t: 1
}).delay(delay).during(function () {
self.updateSymbolPosition(symbol);
});
if (!loop) {
animator.done(function () {
self.remove(symbol);
});
}
animator.start();
}
this._period = period;
this._loop = loop;
};
effectLineProto.getLineLength = function (symbol) {
// Not so accurate
return vec2.dist(symbol.__p1, symbol.__cp1) + vec2.dist(symbol.__cp1, symbol.__p2);
};
effectLineProto.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];
};
effectLineProto.updateData = function (lineData, idx, seriesScope) {
this.childAt(0).updateData(lineData, idx, seriesScope);
this._updateEffectSymbol(lineData, idx);
};
effectLineProto.updateSymbolPosition = function (symbol) {
var p1 = symbol.__p1;
var p2 = symbol.__p2;
var cp1 = symbol.__cp1;
var t = symbol.__t;
var pos = symbol.position;
var lastPos = [pos[0], pos[1]];
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 = quadraticDerivativeAt(p1[0], cp1[0], p2[0], t);
var ty = quadraticDerivativeAt(p1[1], cp1[1], p2[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) {
var scaleY = vec2.dist(lastPos, pos) * 1.05;
symbol.attr('scale', [symbol.scale[0], scaleY]); // 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.
var scaleY = 2 * vec2.dist(p1, pos);
symbol.attr('scale', [symbol.scale[0], scaleY]);
} else {
symbol.attr('scale', this._symbolScale);
}
}
symbol.__lastT = symbol.__t;
symbol.ignore = false;
};
effectLineProto.updateLayout = function (lineData, idx) {
this.childAt(0).updateLayout(lineData, idx);
var effectModel = lineData.getItemModel(idx).getModel('effect');
this._updateEffectAnimation(lineData, effectModel, idx);
};
zrUtil.inherits(EffectLine, graphic.Group);
var _default = EffectLine;
module.exports = _default;