谷歌地图API v3:处理用户单击地图类型控件? [英] google maps api v3: handle user click on map type control?

问题描述

当用户单击 mapTypeControl 不同于通过 map.setMapTypeId()进行设置时，我需要处理这种情况.如何监听对地图类型控件的点击?

I need to handle the case when a user clicks on a mapTypeControl differently than when it's set through map.setMapTypeId(). How do I listen for clicks on map type controls?

推荐答案

您不能在默认的UI控件集中监听事件.但是，如果您严格专注于区分 mapTypeControl 和 map.setMapTypeId()的点击，则可以使用以下事实:您控制可能调用的代码setMapTypeId()并添加一些状态管理代码:

You can't listen for events on the default UI control set. But if you are strictly focused on differentiating between clicks on the mapTypeControl and map.setMapTypeId(), you could use the fact that you control the code that may call setMapTypeId() and add some state management code:

// First, add a new state var:
var typeIdChangedInCode = false;

// Then, anywhere in your code where you call setMapTypeId(), add this:
typeIdChangedInCode = true;
map.setMapTypeId( newTypeId ); 

// Finally, include state checking code in the map event listener:
google.maps.event.addListener( map, "maptypeid_changed", function( evnt ) {
    if ( typeIdChangedInCode ) {
        //handle the scenario in the non-click way, but REMEMBER TO:
        typeIdChangedInCode = false;
    }
    else {
        //handle the scenario in the map click way
    }
});

这应该使您能够按照需要的方式处理两种不同的情况.

This should set you up to handle the two different occurrences in the way you need.

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