Twaver-HTML5基础学习(7)Layer图层元素

Layer图层元素

图层的属性

twaver.Layer(图层)继承于twaver.Data,用于描述拓扑网元的图层信息，Layer有四个特殊属性：visible,editable,movable,rotatable。

//显示隐藏
setVisible:function()
getVisible:function()
//是否可以移动
setMovable:function()
getMovable:function()
//是否能编辑
setEditable:function()
getEditable:function()
//是否可以旋转
setRotatable:function()
getRotatable:function()

图层的使用

TWaver DataBox可用于存放所有的Element,Element上包含Layer属性,默认在TWaver中预定义的一个图层(默认图层),这个图层不可更改。
TWaver HTML5中的层次关系由LayerBox来管理，默认的层次顺序由父子关系和加入的先后顺序决定,先加入则在下面。
拓扑图中，每个Element通过设置LayerID与某个Layer相关联以控制网元的显示层次。

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);
}

/**
 * 
 * @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;
}

React代码：

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 });
        // 得到图层容器对象
        var layerBox = box.getLayerBox();
        var layer1 = new twaver.Layer('unmovable', 'unmovable layer');
        console.log(layer1)
        layer1.setMovable(false);
        var layer2 = new twaver.Layer('uneditable', 'uneditable layer');
        layer2.setEditable(false);
        var layer3 = new twaver.Layer('unvisible', 'unvisible Layer');
        layer3.setVisible(true); 
        layerBox.add(layer1); 
        layerBox.add(layer2);
        layerBox.add(layer3);

        createNode(box,layer1, 'circle', 300, 100, 200, 200, '#57ab9a');
        createNode(box,layer2, 'diamond', 350, 200, 200, 200, '#ef8200');
        createNode(box,layer3, 'rectangle', 200, 200, 200, 200, '#ec6c00');
        createNode(box,layer3, 'rectangle', 500, 500, 200, 200, '#ec6c00');
        createNode(box,layerBox.getDefaultLayer(), 'rectangle', 100, 100, 250, 250, '#61b6d8'); 

    }

    useEffect(init, [])
    return (
        <>
            <p style={
   {
    fontSize: "20px", paddingLeft: "50px", poaddingTop: "50px" }}>tips: </p>
            <ul style={
   {
    fontSize: "20px", paddingLeft: "50px" }}>

                <li>图层元素(Layer)</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

图层layer对象来自于数据容器dataBox,

 // 得到图层容器对象
 var layerBox = box.getLayerBox();

网元通过layerId与图层进行关联：

node.setLayerId(layer.getId());

学习参考：TWaver Documents