要創建一個像您在樣機中一樣的居中控件,您可以修改@ghybs針對之前的問題發佈的this solution。基本上,你創建一個CSS類地圖窗格中中控:
.leaflet-horizontalcenter {
position: absolute;
left: 50%;
transform: translateX(-50%);
padding-top: 10px;
}
.leaflet-horizontalcenter .leaflet-control {
margin-bottom: 10px;
}
然後創建一個新的佔位符附加到地圖容器類:
function addControlPlaceholders(map) {
var corners = map._controlCorners,
l = 'leaflet-',
container = map._controlContainer;
function createCorner(vSide, hSide) {
var className = l + vSide + ' ' + l + hSide;
corners[vSide + hSide] = L.DomUtil.create('div', className, container);
}
createCorner('horizontalcenter', 'bottom');
}
addControlPlaceholders(map);
你可以使用任何你喜歡的方法用於創建按鈕,但this codepen example顯示了一種合理簡單的方式將單選按鈕設置爲矩形框。創建具有這些按鍵的自定義控制,將是這樣的:
var buttonBar = L.control({
position: 'horizontalcenterbottom'
});
buttonBar.onAdd = function(map) {
//create div container for control
var div = L.DomUtil.create('div', 'myButtonBar');
//prevent mouse events from propagating through to the map
L.DomEvent.disableClickPropagation(div);
//create custom radio buttons
div.innerHTML = '<div class="switch-field noselect"><div class="switch-title">MAPS</div>'
+ '<input type="radio" id="switch_map1" name="map_switch" checked/>'
+ '<label for="switch_map1">Map 1</label>'
+ '<input type="radio" id="switch_map2" name="map_switch" />'
+ '<label for="switch_map2">Map 2</label>'
+ '<input type="radio" id="switch_map3" name="map_switch" />'
+ '<label for="switch_map3">Map 3</label></div>'
+ '<div class="switch-field noselect">'
+ '<input type="radio" id="switch_marker1" name="marker_switch" checked/>'
+ '<label for="switch_marker1">Marker 1</label>'
+ '<input type="radio" id="switch_marker2" name="marker_switch" />'
+ '<label for="switch_marker2">Marker 2</label>'
+ '<input type="radio" id="switch_marker3" name="marker_switch" />'
+ '<label for="switch_marker3">Marker 3</label>'
+ '<div class="switch-title">MARKERS</div></div>';
return div;
};
buttonBar.addTo(map);
這是一個有點比標準層的控制不太方便,因爲你必須輸入按鈕的名稱等手工,但有一點更多的工作,這可以通過您已創建的baseLayers
和overlays
對象以編程方式完成。如果你想創建按鈕周圍一個盒子從視覺地圖隔離開來,你也可以添加一些CSS像這樣風格的控件創建的DIV:
.myButtonBar {
background: white;
box-shadow: 0 1px 7px rgba(0, 0, 0, 0.25);
-webkit-border-radius: 4px;
border-radius: 4px;
text-align: center;
padding: 0px 10px;
position: relative;
}
最後,拿到層變化當按鈕被點擊時,你附加一些事件監聽器。既然你已經使用jQuery,我們只使用:
$("#switch_map1").click(function() {
switchLayer(baseLayers, "Map 1");
});
$("#switch_map2").click(function() {
switchLayer(baseLayers, "Map 2");
});
$("#switch_map3").click(function() {
switchLayer(baseLayers, "Map 3");
});
$("#switch_marker1").click(function() {
switchLayer(overlays, "Marker 1");
});
$("#switch_marker2").click(function() {
switchLayer(overlays, "Marker 2");
});
$("#switch_marker3").click(function() {
switchLayer(overlays, "Marker 3");
});
其中switchLayer
是獲取基於其鍵baseLayers
或overlays
對象層的功能,然後將其添加到地圖並刪除其他:
function switchLayer(collection, layerKey) {
if (layerKey in collection) {
$.each(collection, function(key, layer) {
if (key === layerKey) {
if (!map.hasLayer(layer)) {
map.addLayer(layer);
}
} else if (map.hasLayer(layer)) {
map.removeLayer(layer);
}
});
} else {
console.log('There is no layer key by the name "' + layerKey + '" in the specified object.');
}
}
下面是這一切的小提琴一起工作:
http://jsfiddle.net/nathansnider/j0abypqf/
你應該probabl當點擊按鈕時,只需使用'map.addLayer'和'map.removeLayer'。至於你的「左上角的選擇器」,這聽起來應該是一個不同的問題,對你當前的代碼有更多的解釋。 – ghybs