从画布对象上拿到getAlarmLabel方法，设置最新的颜色；
闪烁效果
初始：
新告警颜色
老告警颜色：
工具方法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);
}
react页面代码：
import React, {
useEffect, useState } from 'react'
import {
// returnElementBoxFun,
// returnNetworkFun,
returnGroupFun,
returnElementBoxAndNetworkFun,
returnNodeFun,
returnLineFun,
returnRegisterImage,
returnAlarmFun, ALARM1, ALARM2, ALARM3, ALARM4, ALARM5
} 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: 800, height: 800 });
let node1 =returnNodeFun(box, {
name: '节点1', name2: "节点1name2", location: {
x: 100, y: 100 }, })
returnNodeFun(box, {
name: '节点2', name2: "节点2name2", location: {
x: 500, y: 100 }, })
returnAlarmFun('alarm', node1.getId(), ALARM2,box.getAlarmBox())
var oldAlarmLabel = network.getAlarmLabel;
var newAlarmLabel = function (element) {
if (element.getName() == '节点1' || element.getName() == '节点2' ) {
return null;
}
return network.prototype.getAlarmLabel(element);
}
setInterval(function () {
if (network.getAlarmLabel == oldAlarmLabel) {
network.getAlarmLabel = newAlarmLabel;
network.getInnerColor = function (data) {
return "red";
}
} else if (network.getAlarmLabel === newAlarmLabel) {
network.getAlarmLabel = oldAlarmLabel;
network.getInnerColor = function (data) {
return "#FFF00F";
}
}
network.invalidateElementUIs();
}, 500);
}
useEffect(init, [])
return (
<>
<p style={
{
fontSize: "20px", paddingLeft: "50px", poaddingTop: "50px" }}>tips: </p>
<ul style={
{
fontSize: "20px", paddingLeft: "50px" }}>
<li>alarm.xoffset和alarm.yoffset以及alarm.position </li>
<li>对于Link网元的alarm.xoffset和alarm.yoffset有个特殊的含义,<br />
如果将xoffset的值设置为正负(0-1)之间的值，则代表了alarm在Link上的百分比位置。<br />
当alarm.position设置为”from”，xoffset 取值为”0 – 1”则表示百分比，否则按实际值计算，偏移量均相对于起始from点，<br />
position为”to”，则反之。position为其他任何值，<br />
hotspot点为所有link长度一半的点，xoffset可取正数(0 – 1)、也可取负数(-1-0)，都则按实际值计算。</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
