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https://github.com/lin-123/leaflet.migration

leaflet plugin that provides migration layer. https://lin-123.github.io/leaflet.migration/
https://github.com/lin-123/leaflet.migration

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leaflet plugin that provides migration layer. https://lin-123.github.io/leaflet.migration/

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README

          

# leaflet.migration

leaflet plugin that provides migration lines layer.

## Installation

```
npm install -S leaflet.migration
```

## [Demo](https://lin-123.github.io/leaflet.migration/)

```javascript
import L from 'leaflet';
import 'leaflet/dist/leaflet.css';
import 'leflet.migration';
const data = [
{
labels: ['from', 'to'],
from: [lat, lng],
to: [lat, lng],
color: '',
value: '',
},
];
const popover = document.querySelector('.popover');
const options = {
marker: {
radius: [5, 10],
pulse: true,
textVisible: true
},
line: {
width: 1,
order: false,
icon: {
type: 'arrow',
imgUrl: '',
size: 20
},
},
// marker: 'https://github.githubassets.com/favicons/favicon.png',
replacePopover(x, y, data, index) {
console.log(x, y, data, index, 'replace popover');
popover.innerHTML =
'value:' + data.value + '\nfrom:' + data.labels[1] + '\nto:' + data.labels[0];
return popover;
},
onShowPopover(data, index) {
console.log(data, index, 'show popover');
},
onHidePopover(data) {
console.log('hide popover', data);
},
};
const migrationLayer = L.migrationLayer(data, options);
migrationLayer.setStyle({ pulse: { radius: 20 } });
migrationLayer.setData([]);
map.remove(migrationLayer);
```

## API

### Data

| type | description |
| ------------------- | ------------------- |
| `[]` | migration data list |

MigrationData

| name | type | description |
| --------- | ----------------------------- | ------------------------------- |
| labels | `[from, to]` | label |
| from | `[lat, lng]` | from label latlng |
| to | `[lat, lng]` | to label latlng |
| color | string | the color of each arc and pulse |
| value | number | intense value of migration line |

### Options

| name | type | default | description |
| --------- | ------- | ------------ | -------------------------------------------- |
| marker | MarkerOption | - | marker style |
| line | LineOption | - | line style |
| minZoom | number | 3 | migration layer display when zoom >= 3 |
|replacePopover|(`x`, `y`, `data`, `index`) => Element | - |replace default popover by return element |
|onShowPopover|(`data`, `index`) => void | - | called on mouse hover pulse |
| onHidePopover|(`index`) => void | none | called on mouse leave pulse |

MarkerOption

| name | type | default |description |
| --------- | -----------------------------| --- | ------------------------------- |
| radius | `[min, max]`| [5, 10] | marker size range, measure by MigrationData.value |
| pulse | boolean | true | marker's ring animation |
| textVisible | boolean | false | whether marker label |

LineOption
| name | type | default | description |
| ---- | ---- | ------- | ----------- |
| width | number | 1 | migration line width |
| order | boolean | false | whether the sweep run in sequence |
| icon | LineIcon | { type: 'circle', size: 20 } | sweep header style |

LineIcon

| name | type | default | description |
| ---- | ---- | ------- | ----------- |
| type | `circle|arrow|img` | circle | icon type |
| imgUrl | string | - | Image url when type is img |
| size | number | 20 | icon size |

### Methods

| method | returns | descrition |
| ---------------------------- | ------- | ------------------------------ |
| setData(`[]`) | this | update migration data |
| setStyle(options) | this | update style |
| show() | this | show layer |
| hide() | this | hide layer |
| play() | this | run animate of arc and pulse |
| pause() | this | pause animate of arc and pulse |

Methods inherited from [L.Layer](https://leafletjs.com/reference-1.5.0.html#layer)

| method | returns | descrition |
| --------------------- | ------- | -------------------------------------------------- |
| onAdd(` map`) | this | called on L.migrationLayer(data, style).addTo(map) |
| onRemove(` map`) | this | called on map.remove(migrationLayer) |

## Requirements

- leaflet ^1.8.0
- node ^14.17.3