HTML节点(HTMLNode)
twaver.HTMLNode继承于twaver.Node,是一种专门用于呈现HTML元素的网元,在HTMLNode上，您可以将任何HTML元素添加到该网元上,包括div、image、svg、table等等。与之对应使用的是HTMLLink,用于在Link上呈现HTML元素，具体使用和HTMLNode完全一致。
既然HTMLNode继承于Node,那么自然HTMLNode会具有Node的所有特点,唯一的区别在于HTMLNode的LabelAttachment和AlarmAttachment可以支持HTML样式。twaver默认情况下注册了”attachment.label.style”和”attachment.alarm.style”为”html”,当选择值为”none”的时候，HTMLNode和Node完全一致。
node.s('attachment.label.style','html');//'none', 'html'
node.s('attachment.alarm.style','html');//'none', 'html'
当着两个属性为none的时候，就和node节点一样了。
HTMLNode
HTMLNode支持两种方式呈现HTML元素，一种是将HTML元素转换为字符串，通过setName()方法设置，HTML元素将作为网元的LabelAttachment或者AlarmAttachment呈现；第二种是直接将HTML
DOM元素通过setName()方法设置，下面分别介绍这两种呈现方式。
第一种呈现：字符串
setName
let str2 = new twaver.HTMLNode({
width: 100, height: 100, name: `<div style="width:100px;height:50px,border:1px solid red;text-align:center">str 六卿</div>`, location: {
x: 400, y: 500 } })
box.add(str2)
第二种呈现：DOM元素
// 创建元素 添加到容器
let createDiv = document.createElement('div')
createDiv.style.width = "100px";
createDiv.style.height = "100px";
createDiv.style.backgroundColor = "#ccc";
createDiv.style.fontSize = "22px";
createDiv.style.textAlign = "center";
createDiv.style.lineHeight = "100px";
createDiv.innerHTML = "六卿"
let str1 = new twaver.HTMLNode({
name: createDiv, name2: "name2" })
str1.setLocation(200, 200)
box.add(str1)
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;
}片
react页面
/*
* @Descripttion:
* @version:
* @Author: ZhangJunQing
* @Date: 2022-04-18 14:44:05
* @LastEditors: ZhangJunQing
* @LastEditTime: 2022-04-18 19:00:26
*/
import React, {
useEffect, useState } from 'react'
import {
// returnElementBoxFun,
// returnNetworkFun,
returnGroupFun,
returnElementBoxAndNetworkFun,
returnNodeFun,
returnLineFun,
returnRegisterImage,
returnAlarmFun, ALARM1, ALARM2, ALARM3, ALARM4, ALARM5,
createNode
} 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 });
// 重写了告警显示的样式
network.getAlarmLabel = function (element) {
// 判断当前网元是否是告警状态
var severity = element.getAlarmState().getHighestNewAlarmSeverity();
if (severity) {
// element.getAlarmState().getNewAlarmCount(severity) 获取告警数量
var label = element.getAlarmState().getNewAlarmCount(severity) + severity.nickName;
if (element.getAlarmState().hasLessSevereNewAlarms()) {
label += "+";
}
label = `<p style="color:red;width:100px,height:20px;background-color:blue">${
label}</p>`;
return label;
}
return null;
}
// 创建元素 添加到容器
let createDiv = document.createElement('div')
createDiv.style.width = "100px";
createDiv.style.height = "100px";
createDiv.style.backgroundColor = "#ccc";
createDiv.style.fontSize = "22px";
createDiv.style.textAlign = "center";
createDiv.style.lineHeight = "100px";
createDiv.innerHTML = "六卿"
let str1 = new twaver.HTMLNode({
name: createDiv, name2: "name2" })
str1.setLocation(200, 200)
box.add(str1)
// <div style='background:rgba(200,200,200,0.6)'>
let str2 = new twaver.HTMLNode({
width: 100, height: 100, name: `<div style="width:100px;height:50px,border:1px solid red;text-align:center">str 六卿</div>`, location: {
x: 400, y: 500 } })
returnAlarmFun('str2 Alarm', str2.getId(), ALARM3, box.getAlarmBox())
box.add(str2)
// name属性引入img
var htmlNode = new twaver.HTMLNode({
width: 95,
height: 95,
name: "<image src='/static/topoimages/dev1.png' style='width:100px;height:100px'/>",
location: {
x: 100, y: 500 }
});
box.add(htmlNode);
htmlNode.setStyle('label.position', 'bottom');
}
useEffect(init, [])
return (
<>
<p style={
{
fontSize: "20px", paddingLeft: "50px", poaddingTop: "50px" }}>tips: </p>
<ul style={
{
fontSize: "20px", paddingLeft: "50px" }}>
<li>拓扑元素(Element)</li>
<li>网元(Element)</li>
<li>节点(Node)</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
