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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.
*/
import {forceLayout} from './forceHelper';
import {simpleLayout} from './simpleLayoutHelper';
import {circularLayout} from './circularLayoutHelper';
import {linearMap} from '../../util/number';
import * as vec2 from 'zrender/src/core/vector';
import * as zrUtil from 'zrender/src/core/util';
import GlobalModel from '../../model/Global';
import GraphSeriesModel, { GraphNodeItemOption, GraphEdgeItemOption } from './GraphSeries';
import {getCurvenessForEdge} from '../helper/multipleGraphEdgeHelper';
export interface ForceLayoutInstance {
step(cb: (stopped: boolean) => void): void
warmUp(): void
setFixed(idx: number): void
setUnfixed(idx: number): void
}
export default function graphForceLayout(ecModel: GlobalModel) {
ecModel.eachSeriesByType('graph', function (graphSeries: GraphSeriesModel) {
const coordSys = graphSeries.coordinateSystem;
if (coordSys && coordSys.type !== 'view') {
return;
}
if (graphSeries.get('layout') === 'force') {
const preservedPoints = graphSeries.preservedPoints || {};
const graph = graphSeries.getGraph();
const nodeData = graph.data;
const edgeData = graph.edgeData;
const forceModel = graphSeries.getModel('force');
const initLayout = forceModel.get('initLayout');
if (graphSeries.preservedPoints) {
nodeData.each(function (idx) {
const id = nodeData.getId(idx);
nodeData.setItemLayout(idx, preservedPoints[id] || [NaN, NaN]);
});
}
else if (!initLayout || initLayout === 'none') {
simpleLayout(graphSeries);
}
else if (initLayout === 'circular') {
circularLayout(graphSeries, 'value');
}
const nodeDataExtent = nodeData.getDataExtent('value');
const edgeDataExtent = edgeData.getDataExtent('value');
// let edgeDataExtent = edgeData.getDataExtent('value');
const repulsion = forceModel.get('repulsion');
const edgeLength = forceModel.get('edgeLength');
const repulsionArr = zrUtil.isArray(repulsion)
? repulsion : [repulsion, repulsion];
let edgeLengthArr = zrUtil.isArray(edgeLength)
? edgeLength : [edgeLength, edgeLength];
// Larger value has smaller length
edgeLengthArr = [edgeLengthArr[1], edgeLengthArr[0]];
const nodes = nodeData.mapArray('value', function (value: number, idx) {
const point = nodeData.getItemLayout(idx) as number[];
let rep = linearMap(value, nodeDataExtent, repulsionArr);
if (isNaN(rep)) {
rep = (repulsionArr[0] + repulsionArr[1]) / 2;
}
return {
w: rep,
rep: rep,
fixed: nodeData.getItemModel<GraphNodeItemOption>(idx).get('fixed'),
p: (!point || isNaN(point[0]) || isNaN(point[1])) ? null : point
};
});
const edges = edgeData.mapArray('value', function (value: number, idx) {
const edge = graph.getEdgeByIndex(idx);
let d = linearMap(value, edgeDataExtent, edgeLengthArr);
if (isNaN(d)) {
d = (edgeLengthArr[0] + edgeLengthArr[1]) / 2;
}
const edgeModel = edge.getModel<GraphEdgeItemOption>();
const curveness = zrUtil.retrieve3(
edge.getModel<GraphEdgeItemOption>().get(['lineStyle', 'curveness']),
-getCurvenessForEdge(edge, graphSeries, idx, true),
0
);
return {
n1: nodes[edge.node1.dataIndex],
n2: nodes[edge.node2.dataIndex],
d: d,
curveness,
ignoreForceLayout: edgeModel.get('ignoreForceLayout')
};
});
// let coordSys = graphSeries.coordinateSystem;
const rect = coordSys.getBoundingRect();
const forceInstance = forceLayout(nodes, edges, {
rect: rect,
gravity: forceModel.get('gravity'),
friction: forceModel.get('friction')
});
forceInstance.beforeStep(function (nodes, edges) {
for (let i = 0, l = nodes.length; i < l; i++) {
if (nodes[i].fixed) {
// Write back to layout instance
vec2.copy(
nodes[i].p,
graph.getNodeByIndex(i).getLayout() as number[]
);
}
}
});
forceInstance.afterStep(function (nodes, edges, stopped) {
for (let i = 0, l = nodes.length; i < l; i++) {
if (!nodes[i].fixed) {
graph.getNodeByIndex(i).setLayout(nodes[i].p);
}
preservedPoints[nodeData.getId(i)] = nodes[i].p;
}
for (let i = 0, l = edges.length; i < l; i++) {
const e = edges[i];
const edge = graph.getEdgeByIndex(i);
const p1 = e.n1.p;
const p2 = e.n2.p;
let points = edge.getLayout() as number[][];
points = points ? points.slice() : [];
points[0] = points[0] || [];
points[1] = points[1] || [];
vec2.copy(points[0], p1);
vec2.copy(points[1], p2);
if (+e.curveness) {
points[2] = [
(p1[0] + p2[0]) / 2 - (p1[1] - p2[1]) * e.curveness,
(p1[1] + p2[1]) / 2 - (p2[0] - p1[0]) * e.curveness
];
}
edge.setLayout(points);
}
});
graphSeries.forceLayout = forceInstance;
graphSeries.preservedPoints = preservedPoints;
// Step to get the layout
forceInstance.step();
}
else {
// Remove prev injected forceLayout instance
graphSeries.forceLayout = null;
}
});
}
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