Twaver-HTML5基础学习(9)HTML节点(HTMLNode)

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