Twaver-HTML5基础学习(12)连线(Link)

连线(Link)

连线通常表示为节点间的连接关系，需要指定起始结束节点，TWaver支持自环，即起始结束节点为同一个节点。
直接与连线相连的节点我们称之为fromNode,toNode,如果起始或者结束节点放在网元组中，网元组合并状态时，外观上网元组和连线相连，这个时候此网元组为代理节点。
当节点之间有多条连线时，TWaver支持连线的捆绑和展开，默认双击其中一条连线即可实现两种状态的切换，绑定时显示的连线称为绑定代理，默认将第一条连线设为代理，用户也可以指定代理。

//获取、设置起始点
get/setFromNode:function(fromNode)
//获取、设置结束点
get/setToNode:function(toNode)
//获取代理起始点
getFromAgent:function()
//获取代理结束点
getToAgent:function()
getBundleLinks:function()
getBundleCount:function()
getBundleIndex:function()
reverseBundleExpanded:function()
isBundleAgent:function()

例子

工具Js

const twaver = require('twaver');
// 设置每个图元name的颜色
twaver.Styles.setStyle('label.color', '#ec6c00');
// 设置每个图元name2的颜色
twaver.Styles.setStyle('label2.color', '#57ab9a');
twaver.Styles.setStyle('select.color', '#ef8200');
//TWaver内部预定义六中告警级别
twaver.AlarmSeverity.CRITICAL = twaver.AlarmSeverity.add(500, 'Critical', 'C', "#FF0000");
twaver.AlarmSeverity.MAJOR = twaver.AlarmSeverity.add(400, 'Major', 'M', "#FFA000");
twaver.AlarmSeverity.MINOR = twaver.AlarmSeverity.add(300, 'Minor', 'm', "#FFFF00");
twaver.AlarmSeverity.WARNING = twaver.AlarmSeverity.add(200, 'Warning', 'W', "#00FFFF");
twaver.AlarmSeverity.INDETERMINATE = twaver.AlarmSeverity.add(100, 'Indeterminate', 'N', "#C800FF");
twaver.AlarmSeverity.CLEARED = twaver.AlarmSeverity.add(0, 'Cleared', 'R', "#00FF00");

const {
    CRITICAL, MAJOR, WARNING, MINOR, INDETERMINATE, CLEARED } = twaver.AlarmSeverity
export const ALARM1 = CLEARED
export const ALARM2 = INDETERMINATE
export const ALARM3 = MINOR
export const ALARM4 = MAJOR
export const ALARM5 = CRITICAL

/**
 * 创建一个dataBox容器
 * 容器中可以add图元
 */
export const returnElementBoxFun = () => new twaver.ElementBox()


/**
 * 创建一个画布 network对象
 * @param {ElementBox} box  创建一个画布 network对象
 */
export const returnNetworkFun = (box) => new twaver.vector.Network(box)

/**
 * 创建一个Group
 * 用于包裹图元
 */
export const returnGroupFun = (box, obj = {
   }) => {
   
    let group = new twaver.Group(obj)
    box.add(group)
    return group
}



/**
 * 创建一个容器dataBox和一个画布
 * 并将容器实例化画布
 * @returns [box,network] box network
 */
export const returnElementBoxAndNetworkFun = () => {
   
    let box = returnElementBoxFun();
    let network = returnNetworkFun(box);
    return [box, network]
}

/**
 * 用于创建一个节点
 * @param {ElementBox} box dataBox 
 * @param {String} name 当前节点的name
 * @param {Number} x   当前节点的x坐标
 * @param {Number} y 当前节点的y坐标
 * @returns {Node} Node
 */
export const returnNodeFun = (box, Obj = {
   }) => {
   
    let node = new twaver.Node(Obj);
    // node.setName(name);
    // node.setLocation(x, y);
    box.add(node);
    return node
}

/**
 * 
 * @param {Node} node1 节点1
 * @param {Node} node2 节点2
 */
export const returnLineFun = (node1, node2) => new twaver.Link(node1, node2)

/**
 * 注册图片 用于设置图元的img setImage
 * @param {String} url 图片 url
 * @param {NetWork} svg  NetWork对象
 */
export function returnRegisterImage(url, svg) {
   
    var image = new Image();
    image.src = url;
    var views = arguments;
    image.onload = function () {
   
        // getImageName 获取到的图片name用做 node节点的显示img
        twaver.Util.registerImage(getImageName(url), image, image.width, image.height, svg === true);
        image.onload = null;
        for (var i = 1; i < views.length; i++) {
   
            var view = views[i];
            if (view.invalidateElementUIs) {
   
                view.invalidateElementUIs();
            }
            if (view.invalidateDisplay) {
   
                view.invalidateDisplay();
            }
        }
    };
    // getImageName 获取到的图片name用做 node节点的显示img
    const getImageName = (url) => {
   
        var index = url.lastIndexOf('/');
        var name = url;
        if (index >= 0) {
   
            name = url.substring(index + 1);
        }
        index = name.lastIndexOf('.');
        if (index >= 0) {
   
            name = name.substring(0, index);
        }
        return name;
    }
}


/*
 * @param {*} 告警的Id 
 * @param {*} 告警网元的Id 
  * @param {*} 告警级别 
 * @param {*} alarmBox 网元容器.getAlarmBox()
 */
export const returnAlarmFun = (alarmID, elementID, alarmSeverity, alarmBox) => {
   
    var alarm = new twaver.Alarm(alarmID, elementID, alarmSeverity);
    alarmBox.add(alarm);
}

/**
 * 
 * @param {*} box 容器dataBox
 * @param {*} layer layer对象
 * @param {*} shape 图层的形状
 * @param {*} x node点的坐标
 * @param {*} y node点的坐标
 * @param {*} width 图层的宽高
 * @param {*} height 图层的宽高
 * @param {*} fillColor  图层填充颜色
 */
/**
 * 
 * shape 
 * circle 圆形
 * diamond 菱形
 * rectangle 长方形
 */
export const createNode = (box, layer, shape, x, y, width, height, fillColor, ) => {
   
    var node = new twaver.Node();
    node.setLayerId(layer.getId());
    node.setName('layer-' + layer.getId());
    node.setStyle('body.type', 'vector');
    node.setStyle('vector.fill.alpha', 0.7);
    node.setStyle('vector.shape', shape);
    node.setSize(width, height);
    node.setLocation(x, y);
    node.setStyle('vector.fill.color', fillColor);
    box.add(node); return node;
}
/**
 * 
 * @param {*} table 
 * @param {*} name 
 * @param {*} propetyName 
 * @param {*} propertyType 
 * @param {*} valueType 
 */
export const returnCreateColumn = (table, name, propetyName, propertyType, valueType) => {
   
    var column = new twaver.Column(name);
    column.setName(name);
    column.setPropertyName(propetyName);
    column.setPropertyType(propertyType);
    if (valueType) {
   
        column.setValueType(valueType);
    }
    table.getColumnBox().add(column);
    return column;
}

export const returnRandomColor = () => {
   
    var r = randomInt(255);
    var g = randomInt(255);
    var b = randomInt(255);
    return '#' + formatNumber((r << 16) | (g << 8) | b);
}
function randomInt(n) {
   
    return Math.floor(Math.random() * n);
}

function formatNumber(value) {
   
    var result = value.toString(16);
    while (result.length < 6) {
    result = '0' + result; } return result;
}

react页面

/*
 * @Descripttion: 
 * @version: 
 * @Author: ZhangJunQing
 * @Date: 2022-04-18 14:44:05
 * @LastEditors: ZhangJunQing
 * @LastEditTime: 2022-04-19 18:27:38
 */
import React, {
    useEffect, useState } from 'react'
import {
   
    returnElementBoxAndNetworkFun,
    returnNodeFun,
    returnLineFun,

} from './utils'
const twaver = require('twaver');
// const demo = require('demo');
const Demo = () => {
   
    const [network, setnetwork] = useState({
   })
    const init = () => {
   
        const [box, network] = returnElementBoxAndNetworkFun()
        setnetwork(_ => network)
        network.invalidateElementUIs();
        document.getElementById("testID").appendChild(network.getView());
        // 设置最初的大小
        network.adjustBounds({
    x: 0, y: 0, width: 1000, height: 1000 });

        initDataBox();

        function initDataBox() {
   
            let from = returnNodeFun(box, {
    name: 'from', location: {
    x: 100, y: 100 } })
            let to = returnNodeFun(box, {
    name: 'to', location: {
    x: 300, y: 300 } })
            let otherNode = returnNodeFun(box, {
    name: 'otherNode', location: {
    x: 500, y: 500 } })
            var link1 = returnLineFun(from, to);
            link1.setName('link1');
            link1.s('link.color', '#238475');
            // 设置 name的偏移量
            link1.s('label.xoffset', -10);
            link1.s('label.yoffset', -10);
            box.add(link1)
            var link2 = returnLineFun(from, to);
            link2.setName('link2');
            link2.s('link.color', '#238475');
            box.add(link2);
            var link3 = returnLineFun(from, to);
            link3.setName('link3');
            // 设置 name的偏移量
            link3.s('label.xoffset', 10);
            link3.s('label.yoffset', 10);
            link3.s('link.color', '#238475');
            box.add(link3);
            var link4 = returnLineFun(from, to);
            link4.setName('link4');
            // 获取link4的起始点 node 的 name
            console.log(link4.getFromNode().getName())
            // 获取link4的结束点 node 的 name
            console.log(link4.getToNode().getName())
            // 设置link4 to指向的节点
            link4.setToNode(otherNode)
            //获取代理起始点
            console.log(link4.getFromAgent())
            // 设置 name的偏移量
            link4.s('label.xoffset', 10);
            link4.s('label.yoffset', 20);
            link4.s('link.color', '#238475');
            box.add(link4);
        }
    }
    useEffect(init, [])
    return (
        <>
            <p style={
   {
    fontSize: "20px", paddingLeft: "50px", poaddingTop: "50px" }}>tips: </p>
            <ul style={
   {
    fontSize: "20px", paddingLeft: "50px" }}>
                <li>连线(Link)</li>
            </ul>
            {
   /* 画布元素需要开启定位 不然生成的图元坐标点会偏移 */}
            <div id="testID" style={
   {
    width: "800px", height: "800px", border: "1px solid #ccc", position: "relative" }}></div>
        </>
    )
}
export default Demo

学习参考：TWaver Documents