标记是可拖动的,但我不能在标记上有自定义div,它会在悬停点击等时发生变化。因此我想到使用自定义叠加,但我无法找出自定义叠加支持拖动。已经有了答案,但演示本身不起作用,
how to make a Custom Overlays draggable using google-maps v3
我没有在overlayView类的代码引用中找到任何内容。
答案 0 :(得分:13)
是的,我们可以。
DraggableOverlay.prototype = new google.maps.OverlayView();
DraggableOverlay.prototype.onAdd = function() {
var container=document.createElement('div'),
that=this;
if(typeof this.get('content').nodeName!=='undefined'){
container.appendChild(this.get('content'));
}
else{
if(typeof this.get('content')==='string'){
container.innerHTML=this.get('content');
}
else{
return;
}
}
container.style.position='absolute';
container.draggable=true;
google.maps.event.addDomListener(this.get('map').getDiv(),
'mouseleave',
function(){
google.maps.event.trigger(container,'mouseup');
}
);
google.maps.event.addDomListener(container,
'mousedown',
function(e){
this.style.cursor='move';
that.map.set('draggable',false);
that.set('origin',e);
that.moveHandler =
google.maps.event.addDomListener(that.get('map').getDiv(),
'mousemove',
function(e){
var origin = that.get('origin'),
left = origin.clientX-e.clientX,
top = origin.clientY-e.clientY,
pos = that.getProjection()
.fromLatLngToDivPixel(that.get('position')),
latLng = that.getProjection()
.fromDivPixelToLatLng(new google.maps.Point(pos.x-left,
pos.y-top));
that.set('origin',e);
that.set('position',latLng);
that.draw();
});
}
);
google.maps.event.addDomListener(container,'mouseup',function(){
that.map.set('draggable',true);
this.style.cursor='default';
google.maps.event.removeListener(that.moveHandler);
});
this.set('container',container)
this.getPanes().floatPane.appendChild(container);
};
function DraggableOverlay(map,position,content){
if(typeof draw==='function'){
this.draw=draw;
}
this.setValues({
position:position,
container:null,
content:content,
map:map
});
}
DraggableOverlay.prototype.draw = function() {
var pos = this.getProjection().fromLatLngToDivPixel(this.get('position'));
this.get('container').style.left = pos.x + 'px';
this.get('container').style.top = pos.y + 'px';
};
DraggableOverlay.prototype.onRemove = function() {
this.get('container').parentNode.removeChild(this.get('container'));
this.set('container',null)
};
它观察mousemove-event并根据距离最后一个鼠标位置的距离修改叠加层的顶部/左侧样式。
用法:
new DraggableOverlay(
map,//maps-instance
latLng,//google.maps.LatLng
'content',//HTML-String or DOMNode
function(){}//optional, function that ovverrides the draw-method
);
默认情况下,叠加层的左上角将放置在通过latLng
- 参数提供的位置。
要应用自定义绘图,请使用构造函数的可选draw-argument。
演示:http://jsfiddle.net/doktormolle/QRuW8/
编辑: 此解决方案仅适用于google maps api版本3.27。 在3.28版本中,对地图的可拖动选项进行了更改。
发行说明:https://developers.google.com/maps/documentation/javascript/releases#328