Question

是否有任何事件可以检查用户是否缩小地图或缩小地图

我们所做的是......我们希望在更改地图时将纬度或经度发送到服务器。例如，当他们结束拖动时，我们会将纬度和经度发送到服务器，以加载位于该纬度和经度范围内的一些商店位置，我们将把针脚放在上面。因此所有可能的事件都是用户拖动地图，放大，缩小和滚动。我们不会使用bounds_changed事件，因为它会一直向服务器发送数据。

    //Get bound of the map when a user dragged the map.
    google.maps.event.addListener(map, 'dragend', function () {
        bound = map.getBounds();
        var latlng_NE = bound.getNorthEast();
        var latlng_SW = bound.getSouthWest();

       // Some code to send latitude or longtitude to server here
       throw new Error(latlng_NE, latlng_SW);
    });

Answer 1

来自Google Maps API文档

google.maps.event.addListener(map, 'zoom_changed', function() {
    setTimeout(moveToDarwin, 3000);
});

https://developers.google.com/maps/documentation/javascript/events;

修改

// closure
(function() {

    var timeout = null;
    var delay = 500;

    function react() {
        if (timeout) {
            clearTimeout(timeout)
        }
        timeout = setTimeout(react, delay)
    }

    function sendBoundsToServer() {
        bound = map.getBounds();
        var latlng_NE = bound.getNorthEast();
        var latlng_SW = bound.getSouthWest();            
        // some AJAX action to send bound to server
        // ...
    }
    //Action after a user dragged the map.
    google.maps.event.addListener(map, 'zoom_changed', function () {
       // Some code to send latitude or longtitude to server here
       setTimeout(sendMessageToServer, 1000)
    });
    google.maps.event.addListener(map, 'dragend', function () {
       // Some code to send latitude or longtitude to server here
       setTimeout(react, 1000)
    });


    // Add more events here like the two above  


}())

放大或缩小的事件

1 个答案:

修改