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

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/*
* 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 LineGroup = require("./Line");
/*
* 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.
*/
/**
* @module echarts/chart/helper/LineDraw
*/
// import IncrementalDisplayable from 'zrender/src/graphic/IncrementalDisplayable';
/**
* @alias module:echarts/component/marker/LineDraw
* @constructor
*/
function LineDraw(ctor) {
this._ctor = ctor || LineGroup;
this.group = new graphic.Group();
}
var lineDrawProto = LineDraw.prototype;
lineDrawProto.isPersistent = function () {
return true;
};
/**
* @param {module:echarts/data/List} lineData
*/
lineDrawProto.updateData = function (lineData) {
var lineDraw = this;
var group = lineDraw.group;
var oldLineData = lineDraw._lineData;
lineDraw._lineData = lineData; // There is no oldLineData only when first rendering or switching from
// stream mode to normal mode, where previous elements should be removed.
if (!oldLineData) {
group.removeAll();
}
var seriesScope = makeSeriesScope(lineData);
lineData.diff(oldLineData).add(function (idx) {
doAdd(lineDraw, lineData, idx, seriesScope);
}).update(function (newIdx, oldIdx) {
doUpdate(lineDraw, oldLineData, lineData, oldIdx, newIdx, seriesScope);
}).remove(function (idx) {
group.remove(oldLineData.getItemGraphicEl(idx));
}).execute();
};
function doAdd(lineDraw, lineData, idx, seriesScope) {
var itemLayout = lineData.getItemLayout(idx);
if (!lineNeedsDraw(itemLayout)) {
return;
}
var el = new lineDraw._ctor(lineData, idx, seriesScope);
lineData.setItemGraphicEl(idx, el);
lineDraw.group.add(el);
}
function doUpdate(lineDraw, oldLineData, newLineData, oldIdx, newIdx, seriesScope) {
var itemEl = oldLineData.getItemGraphicEl(oldIdx);
if (!lineNeedsDraw(newLineData.getItemLayout(newIdx))) {
lineDraw.group.remove(itemEl);
return;
}
if (!itemEl) {
itemEl = new lineDraw._ctor(newLineData, newIdx, seriesScope);
} else {
itemEl.updateData(newLineData, newIdx, seriesScope);
}
newLineData.setItemGraphicEl(newIdx, itemEl);
lineDraw.group.add(itemEl);
}
lineDrawProto.updateLayout = function () {
var lineData = this._lineData; // Do not support update layout in incremental mode.
if (!lineData) {
return;
}
lineData.eachItemGraphicEl(function (el, idx) {
el.updateLayout(lineData, idx);
}, this);
};
lineDrawProto.incrementalPrepareUpdate = function (lineData) {
this._seriesScope = makeSeriesScope(lineData);
this._lineData = null;
this.group.removeAll();
};
function isEffectObject(el) {
return el.animators && el.animators.length > 0;
}
lineDrawProto.incrementalUpdate = function (taskParams, lineData) {
function updateIncrementalAndHover(el) {
if (!el.isGroup && !isEffectObject(el)) {
el.incremental = el.useHoverLayer = true;
}
}
for (var idx = taskParams.start; idx < taskParams.end; idx++) {
var itemLayout = lineData.getItemLayout(idx);
if (lineNeedsDraw(itemLayout)) {
var el = new this._ctor(lineData, idx, this._seriesScope);
el.traverse(updateIncrementalAndHover);
this.group.add(el);
lineData.setItemGraphicEl(idx, el);
}
}
};
function makeSeriesScope(lineData) {
var hostModel = lineData.hostModel;
return {
lineStyle: hostModel.getModel('lineStyle').getLineStyle(),
hoverLineStyle: hostModel.getModel('emphasis.lineStyle').getLineStyle(),
labelModel: hostModel.getModel('label'),
hoverLabelModel: hostModel.getModel('emphasis.label')
};
}
lineDrawProto.remove = function () {
this._clearIncremental();
this._incremental = null;
this.group.removeAll();
};
lineDrawProto._clearIncremental = function () {
var incremental = this._incremental;
if (incremental) {
incremental.clearDisplaybles();
}
};
function isPointNaN(pt) {
return isNaN(pt[0]) || isNaN(pt[1]);
}
function lineNeedsDraw(pts) {
return !isPointNaN(pts[0]) && !isPointNaN(pts[1]);
}
var _default = LineDraw;
module.exports = _default;