瓷砖上的事件开始载入Google Maps v3 [英] Event on tiles start loading in Google Maps v3

问题描述

我正在寻找一种方法来检测是否加载了谷歌地图v3的瓦片，以及当瓷砖开始加载时触发的事件。

I am looking for a way to detect if tiles of google maps v3 are loading or and event which triggers when tiles start loading.

我的用户界面如下构建：

My UI is build as follows:

背景图层上有一张地图。
在前台有一个用户输入位置的表单。
他点击enter后，地图正在平移并缩放到指定的位置。

There is a map on background layer. On the foreground there is a form in which user enters location. After he hits enter, map is panning and zooming to specified location.

我想做的是隐藏前景层AFTER：
1。地图放大
2.地图是panned
3.所有的瓷砖都被加载

All I want to do is hide foreground layer AFTER: 1. Map is zoomed 2. Map is panned 3. All tiles are loaded

问题是当打字的位置非常接近起始位置，没有tileloaded事件触发，因为地图只能移动几个像素。所以我不能依赖于tileloaded事件。

The problem is that when typed location is very close to starting location, there is no "tilesloaded" event triggered because map panned only few pixels. So I can't depend on "tilesloaded" event.

我不能依赖于bounds_changed或idle事件，因为它们在所有的tile加载之前触发。

I can't also depend on "bounds_changed" or "idle" event because they trigger BEFORE all tiles loads.

你有什么想法吗？

推荐答案

你可以： / p>

You may:

1. 收听 tileloaded -event并在窗体触发时隐藏窗体


2. ，以捕获 tileloaded 没有在变量中存储边界（打开表单时）的情况。观察 bounds_changed -event，并检查存储边界的东北/西南与当前边界之间的差异（屏幕像素）是否小于256（即大小的瓷砖）。当您可以假设没有要加载的图块时，立即触发 tileloaded -event。

1. listen for the tilesloaded-event and hide the form when it fires
2. to catch the case where tilesloaded didn't fire store the bounds(when opening the form) in a variable. Observe the bounds_changed -event and check if the difference(in screen-pixels) between the northeast/southwest of the stored bounds and the current bounds is less than 256(that's the size of a tile). When it does you may assume that there are no tiles to load, trigger the tilesloaded-event immediately.

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