ruby on rails 3 - Gmaps4Rails信息窗口，鼠标悬停

Question

我想要infowindow出现时，鼠标是在一个标记，这是我的代码在coffeescript:

$(document).on 'map:ready', -> addHoverHandlers()
addHoverHandlers = ->
  # m is Gmap4Rails marker, doc in gmaps4rails.base.js.coffee
  for m in Gmaps.map.markers
    # marker is a Google Maps Marker
    # https://developers.google.com/maps/documentation/javascript/reference#Marker
    marker = m.serviceObject
    console.log marker.getPosition().toString()
    # Show the infowindow when user mouses-in
    google.maps.event.addListener marker, "mouseover", ->
      console.log marker.getPosition().toString()
      m.infowindow.open marker.map, marker
    # Hide the infowindow when user mouses-out
    google.maps.event.addListener marker, "mouseout", ->
      m.infowindow.close()

加载时输出:

(39.7317, -104.92099999999999)
(35.2638, -118.91200000000003)
(36.6624, -121.64499999999998) 

但是当鼠标移到每个标记上时(坐标不变):

(36.6624, -121.64499999999998)

将问题置于上下文中，以下是我如何在erb文件中触发map:ready事件:

<% content_for :scripts do %>
    <script type="text/javascript">
        Gmaps.map.callback = function(){
            console.log('callback');
            $(document).trigger('map:ready');
        }
    </script>
<% end %>
<%= yield :scripts %>

Answer 1

我有完全相同的问题:我不知道为什么，但是当您循环Gmaps.map.markers并尝试绑定mouseover侦听器函数时，它将始终评估标记变量作为循环中的最后一个标记。

我的解决方法是:不要在鼠标悬停函数中使用标记变量，而是使用this，这是一个Gmaps标记对象，循环Gmaps.map.markers并找到匹配的。

下面是对你的代码的修改:

$(document).on 'map:ready', -> addHoverHandlers()
addHoverHandlers = ->
  # m is Gmap4Rails marker, doc in gmaps4rails.base.js.coffee
  for m in Gmaps.map.markers
    # marker is a Google Maps Marker
    # https://developers.google.com/maps/documentation/javascript/reference#Marker
    marker = m.serviceObject
    console.log marker.getPosition().toString()
    # Show the infowindow when user mouses-in
    google.maps.event.addListener marker, "mouseover", ->
      console.log marker.getPosition().toString()
      # Loop on Gmaps.map.markers and find the one using this
      for m2 in Gmaps.map.markers
        if m2.serviceObject == this
          m2.infowindow.open m2.serviceObject.map, m2.serviceObject
    # Hide the infowindow when user mouses-out
    google.maps.event.addListener marker, "mouseout", ->
      m.infowindow.close()

我知道这是一个非常低效的方式来实现鼠标悬停功能。至少，它是有效的。

hth