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ailabel's Introduction

AILabel.js

背景:在前端开发过程中难免遇到针对图片的缩放平移;以及在图片上进行矢量数据、文本、标注的展示;如果你有上面的任何需求,恭喜你,找到组织了....
在此背景下,AILabel.js出生了

相关资料

npm下载地址:https://www.npmjs.com/package/ailabel
github地址: https://github.com/dingyang9642/AILabel
api文档(待补充): https://dingyang9642.github.io/AILabel/#/

背景-功能

  1. 解决图片浏览(无极缩放、平移)
  2. 矢量数据、文本、标注展示
  3. 矢量数据绘制、编辑
  4. 标注形式:矩形、多边形、涂抹、折线、打点、文本text、标注marker

示例图

示例Demo

- 要素
- 注记
- 文本
- 绘制编辑
- 矩形编辑
- 要素hover
- 图像&缩略图&比例尺

get started

html\css\js部分

    // 样式声明
    <style>
        #hello-map {
            width: 500px;         // 必须
            height: 400px;        // 必须
            position: relative;   // 必须
            border: 1px solid red;
            cursor: pointer;
        }
    </style>

    // 容器声明
    <div id="hello-map"></div>

    // js声明-容器声明(参数:zoom: 缩放比; {cx: cy:}:初始中心点位置;zoomMax、zoomMin:缩放的比例限制)
    const gMap = new AILabel.Map('hello-map', {zoom: 1080, cx: 0, cy: 0, zoomMax: 650 * 10, zoomMin: 650 / 10, autoPan: true, drawZoom: true});

    // 图片层实例\添加
    const gImageLayer = new AILabel.Layer.Image('img', '../../imgs/demo.jpeg', {w: 1080, h: 720}, {zIndex: 1});
    gMap.addLayer(gImageLayer);

    ***至此、已完成首个简单的hello-map的使用***

矢量数据(Feture)展示

    // 常用样式声明
    const gFetureStyle = new AILabel.Style({strokeColor: '#0000FF'});

    // 矢量层实例\添加
    let gFeatureLayer = new AILabel.Layer.Feature('featureLayer', {zIndex: 2, transparent: true});
    gMap.addLayer(gFeatureLayer);

    // 矢量要素实例\添加
    const fea = new AILabel.Feature.Polygon('id', [
        {x: 10, y: 10},
        {x: 50, y: 10},
        {x: 40, y: 50},
        {x: 20, y: 60},
        {x: 10, y: 10}
    ], {name: '**'}, gFetureStyle);
    gFeatureLayer.addFeature(fea);

文本数据(Text)展示

    // 常用样式声明
    const gTextStyle = new AILabel.Style({strokeColor: '#0000FF'});

    // 文本层实例\添加
    let gTextLayer = new AILabel.Layer.Text('textLayer', {zIndex: 2});
    gMap.addLayer(gTextLayer);

    // 文本要素实例\添加
    const text = new AILabel.Text('id', {
        pos: {x: 100, y: 100},
        offset: {x: 0, y: 0},
        width: 100,
        text: '**'
    }, gTextStyle);
    gTextLayer.addText(text);

标注数据(Marker)展示

    // 不需要声明markerLayer标注图层,有且只有一个markerLayer,可通过gMap.mLayer来获取
    // marker对象实例\添加
    const marker = new AILabel.Marker('name-**', {
        src: './marker.png',
        x: 0,
        y: 0,
        offset: {x: -32, y: -32}
    });
    // 注册监听事件删除标注
    marker.regEvent('click', function () {
        gMap.mLayer.removeMarker(this);
    });
    gMap.mLayer.addMarker(marker);

各类事件监听(mouse、hover、boundsChanged、resize等各类事件)

// mouseDown:wxy => {}
// mouseMove:wxy => {}
// geometryEditing:(type, feature, newPoints) => {}
// geometryEditDone:(type, feature, newPoints) => {}
// geometryDrawDone:(type, points) => {}
// geometryRemove: (type, feature) => {} 【目前只针对点数据】
// featureHover:feature => {}
// featureSelected:feature => {}
// featureStatusReset:() => {}
// boundsChanged() => {}
// resize() => {}
gMap.events.on('mouseDown', xy => {console.log('xy');});
gMap.events.on('boundsChanged', () => {console.log('boundsChanged');});
gMap.events.on('featureHover', feature => {console.log(feature);});
...

矢量数据绘制、编辑(点、线、面、涂抹Mask)

    // 常用样式声明
    const gFetureStyle = new AILabel.Style({strokeColor: '#0000FF'});

    // 设置当前操作模式为‘drawRect’, 浏览状态对应mode为'pan'
    gMap.setMode('drawRect', gFetureStyle);

    // 矢量层实例\添加
    let gFeatureLayer = new AILabel.Layer.Feature('featureLayer', {zIndex: 2, transparent: true});
    gMap.addLayer(gFeatureLayer);

    // 绘制完成事件监听
    gMap.events.on('geometryDrawDone', function (type, points) {
        // 生成元素唯一标志(时间戳)
        const timestamp = new Date().getTime();
        // 元素添加展示
        let fea = new AILabel.Feature.Polygon(`feature-${timestamp}`, points, {
            name: '**'
        }, gFetureStyle);
        gFeatureLayer.addFeature(fea);
    });
    // 因为自带编辑功能,故需要以下代码
    gMap.events.on('geometryEditDone', (type, activeFeature, points) => {
        activeFeature.update({points});
        activeFeature.show();
    });

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