@mapgis/webclient-leaflet-plugin
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<h1> MapGIS Client for JavaScript API</h1>
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<div class="category"><div style="font-weight: bold;vertical-align: middle;padding: 0.4rem 0;" class="mapgis-menu-span"><img style="width: 20px;margin-right: 6px;vertical-align: middle;" src="./styles/m.png" alt="">视图模块</div><ul class="mapgis-sidebar-menus"><li><img style="width: 20px;margin-right: 6px;vertical-align: middle;" src="./styles/c.png" alt=""><a href="DrawControl.html">DrawControl</a><span style="display: none;"><p>绘制工具</p></span></li><li><img style="width: 20px;margin-right: 6px;vertical-align: middle;" src="./styles/c.png" alt=""><a href="MapView.html">MapView</a><span style="display: none;"><p>二维场景视图(leaflet引擎)，对地图引擎进行管理，如果要对地图图层进行管理请参考[Map]{@link Map}，<br/>
参考示例：
<a href='#MapView'>[初始化二维场景视图]</a>
<br>[ES5引入方式]：<br/>
Zondy.MapView() <br/>
[ES6引入方式]：<br/>
import { MapView } from '@mapgis/webclient-leaflet-plugin' <br/></p></span></li><li><img style="width: 20px;margin-right: 6px;vertical-align: middle;" src="./styles/c.png" alt=""><a href="Popup.html">Popup</a><span style="display: none;"><p>二维场景信息弹窗(leaflet引擎)
参考示例：
<a href='#MapView'>[初始化二维场景视图]</a>
[ES6引入方式]：<br/>
import { Popup } from '@mapgis/webclient-leaflet-plugin' <br/>
自定义样式说明：<br/>
zondy-popup__content 弹窗容器样式<br/>
zondy-popup__tip 弹窗对话框箭头样式<br/>
zondy-popup__header 弹窗头部样式<br/>
zondy-popup__content 弹窗主体样式<br/>
zondy-popup__footer 弹窗底部样式<br/></p></span></li><li><img style="width: 20px;margin-right: 6px;vertical-align: middle;" src="./styles/c.png" alt=""><a href="Screenshot.html">Screenshot</a><span style="display: none;"><p>屏幕打印工具</p></span></li></ul><div style="font-weight: bold;vertical-align: middle;padding: 0.4rem 0;" class="mapgis-menu-span"><img style="width: 20px;margin-right: 6px;vertical-align: middle;" src="./styles/m.png" alt="">草图编辑模块</div><ul class="mapgis-sidebar-menus"><li><img style="width: 20px;margin-right: 6px;vertical-align: middle;" src="./styles/c.png" alt=""><a href="SketchEditorLeaflet.html">SketchEditorLeaflet</a><span style="display: none;"><p>二维场景草图编辑类<br/>
<br>[ES5引入方式]：<br/>
const { SketchEditorLeaflet } = Zondy <br/>
[ES6引入方式]：<br/>
import { SketchEditorLeaflet } from "@mapgis/webclient-leaflet-plugin" <br/></p></span></li></ul><div style="font-weight: bold;vertical-align: middle;padding: 0.4rem 0;" class="mapgis-menu-span"><img style="width: 20px;margin-right: 6px;vertical-align: middle;" src="./styles/m.png" alt="">渲染器模块</div><ul class="mapgis-sidebar-menus"><li><img style="width: 20px;margin-right: 6px;vertical-align: middle;" src="./styles/c.png" alt=""><a href="Zondy.ThemeLayer.GraphThemeLayer.html">GraphThemeLayer</a><span style="display: none;"><p>统计专题图通过为每个要素绘制统计图表来反映其对应的专题值的大小。它可同时表示多个字段属性信息，在区域本身与各区域之间形成横向和纵向的对比。<br>统计专题图多用于具有相关数量特征的地图上，比如表示不同地区多年的粮食产量、GDP、人口等，不同时段客运量、地铁流量等。目前提供的统计图类型有：柱状图（Bar），折线图（Line），饼图（Pie），三维柱状图（Bar3D），点状图（Point），环状图（Ring）。</p></span></li></ul></div>
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<span class="page-title-sub">view/utils/support/utils.js</span>
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<pre class="prettyprint source linenums"><code>import * as L from '@mapgis/leaflet'
import { Projection } from '@mapgis/webclient-common'
/**
* 获取地图范围，仅在4326相关坐标系下生效，其他坐标系在地图视图的坐标系中设置了范围
* @param {Object} layer 基础图层对象
* @return {Object} leaflet的范围对象
* */
function getBounds(layer) {
let bounds = undefined
if (
String(layer.spatialReference.wkid) === '4326' ||
String(layer.spatialReference.wkid) === '4214' ||
String(layer.spatialReference.wkid) === '4490' ||
String(layer.spatialReference.wkid) === '4610'
) {
const corner1 = L.latLng(layer.extent.ymin, layer.extent.xmin)
const corner2 = L.latLng(layer.extent.ymax, layer.extent.xmax)
bounds = L.latLngBounds(corner1, corner2)
} else if (
String(layer.spatialReference.wkid) === '3857' ||
String(layer.spatialReference.wkid) === '900913'
) {
const point1 = Projection.projectMercatorToLonLat({
x: layer.extent.xmin,
y: layer.extent.ymin
})
const corner1 = L.latLng(point1.latitude, point1.longitude)
const point2 = Projection.projectMercatorToLonLat({
x: layer.extent.xmax,
y: layer.extent.ymax
})
const corner2 = L.latLng(point2.latitude, point2.longitude)
bounds = L.latLngBounds(corner1, corner2)
} else {
const projPoints = Projection.projectToGeographyPoints({
points: [
[layer.extent.xmin, layer.extent.ymin],
[layer.extent.xmax, layer.extent.ymax]
],
wkid: layer.spatialReference.wkid,
proj4Defs: layer.spatialReference.wkt
})
const corner1 = L.latLng(projPoints[0][1], projPoints[0][0])
const corner2 = L.latLng(projPoints[1][1], projPoints[1][0])
bounds = L.latLngBounds(corner1, corner2)
}
return bounds
}
/**
* @description: 获取旋转后地图容器像素坐标系bounds
* @param {*} leafletMap
* @return {*}
*/
function getMapRotateBounds(leafletMap) {
const bounds = leafletMap.getBounds()
const nw = bounds.getNorthWest()
const se = bounds.getSouthEast()
const sw = bounds.getSouthWest()
const ne = bounds.getNorthEast()
const nwPoint = leafletMap.latLngToLayerPoint(nw)
const sePoint = leafletMap.latLngToLayerPoint(se)
const swPoint = leafletMap.latLngToLayerPoint(sw)
const nePoint = leafletMap.latLngToLayerPoint(ne)
// 计算旋转坐标
const pxBounds = L.bounds(nwPoint, sePoint)
pxBounds.extend(swPoint)
pxBounds.extend(nePoint)
// 计算屏幕坐标
const size = leafletMap.getSize()
const leftTop = leafletMap.containerPointToLayerPoint([0, 0])
const rightBottom = leafletMap.containerPointToLayerPoint([size.x, size.y])
const screenBounds = L.bounds(leftTop, rightBottom)
pxBounds.extend(screenBounds.getBottomLeft())
pxBounds.extend(screenBounds.getTopRight())
return pxBounds
}
export { getBounds, getMapRotateBounds }
</code></pre>
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