谷歌地图v3标记鼠标悬停工具提示

问题描述：

我想在鼠标悬停在标记上时使用div创建工具提示，但我不知道如何获取屏幕位置以将div放在正确的位置，以下是我的代码：

I want to put a tooltip made myself with divs when the mouse is over a marker, but I don't know how to get the screen position to put the div on the correct position, here is my code:

google.maps.event.addListener(marker, "mouseover", function() {
            divover.css("left", marker.get("left"));
            divover.css("top", marker.get("top"));
            divover.css("display", "block");
});

google.maps.event.addListener(marker, "mouseout", function() {
            divover.css("display", "none");
});

显然get方法失败。任何想法？

Obviously the get method fails. Any Idea?

答

这是一个棘手的问题。在API的第2版中，您可以执行以下操作：

This is a tricky one. In v2 of the API, you can do:

map.fromLatLngToContainerPixel(marker.getLatLng(), zoomLevel);

在v3中，来自LaLengToContainerPixel的方法已被移至MapCanvasProjection对象。要获得MapCanvasProjection对象，您需要在OverlayView对象上调用getProjection。它看起来像Marker类是从OverlayView扩展的，但不幸的是它没有getProjection方法。我不知道为什么 - 可能值得提交bug。

In v3, the method fromLatLngToContainerPixel has been moved to the MapCanvasProjection object. To get a MapCanvasProjection object, you need to call getProjection on an OverlayView object. It looks like the Marker class is extended from OverlayView, but unfortunately it doesn't have the getProjection method. I have no idea why - may be worth filing a bug.

我这样做的方式是通过基于OverlayView创建自己的自定义标记类，所以它仍然有getProjection方法：

The way I've done it is by creating my own custom marker class, based on OverlayView, so it still has the getProjection method:

var point = this.getProjection().fromLatLngToDivPixel(this.latlng_);

您可以在自定义叠加层或复制其 example ，以帮助您入门。

You can read Google's tutorial on custom overlays or copy their example to get you started.

谷歌地图v3标记鼠标悬停工具提示

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