Question

我希望当鼠标悬停在标记上时显示infowindow，这是我在coffeescript中的代码：

$(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()

此代码在加载时输出：

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

但是鼠标悬停在每个标记上（坐标不会改变）：

(36.6624, -121.64499999999998)

要在上下文中提问，以下是我在erb文件中触发map:ready事件的方式：

<% 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，但是当你在Gmaps.map.markers上循环并尝试绑定鼠标悬停监听器函数时，它总是会将标记变量评估为循环中的最后一个标记

我的解决方法是：不要在鼠标悬停功能中使用标记变量，使用this代替Gmaps Marker对象，在Gmaps.map.markers上循环，找到匹配的标记变量。

以下是代码的修改：

$(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()

我知道这是实现鼠标悬停功能的一种非常低效的方法。至少，它有效。

HTH

鼠标悬停在Gmaps4Rails infowindow上

1 个答案: