代码改变世界

利用 Google API 调用谷歌地图 演示11

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代码如下：

 

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>演示14</title>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
    <style type="text/css">
        html { height: 100%; }
        body { height: 100%; margin: 0px; padding: 0px; }
        #map_canvas { width:50%; height: 50%; margin: 50px auto; }
    </style>
    <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=true&key=ABQIAAAAtzdEfkm0e6fFv-EqYY-XJRQdNSJsfUEFgMWL1fb2TrZ8t0A2pRQ10wAqRsmxpdHzRsHswMJAFavZ6g"></script>
    <!-- sensor 参数表示是否检测用户的地理位置 -->
    <script type="text/javascript">
        var map;
        var chicago = new google.maps.LatLng(22.95, 113.4);
 
        /**
        * The HomeControl adds a control to the map that
        * returns the user to the control's defined home.
        */
 
        // Define a property to hold the Home state
        HomeControl.prototype.home_ = null;
 
        // Define setters and getters for this property
        HomeControl.prototype.getHome = function()
        {
            return this.home_;
        }
 
        HomeControl.prototype.setHome = function(home)
        {
            this.home_ = home;
        }
        function HomeControl(controlDiv, map, home)
        {
 
            // We set up a variable for this since we're adding
            // event listeners later.
            var control = this;
 
            // Set the home property upon construction
            control.home_ = home;
 
            // Set CSS styles for the DIV containing the control
            // Setting padding to 5 px will offset the control
            // from the edge of the map
            controlDiv.style.padding = '5px';
 
            // Set CSS for the control border
            var goHomeUI = document.createElement('DIV');
            goHomeUI.style.backgroundColor = 'white';
            goHomeUI.style.borderStyle = 'solid';
            goHomeUI.style.borderWidth = '2px';
            goHomeUI.style.cursor = 'pointer';
            goHomeUI.style.textAlign = 'center';
            goHomeUI.title = 'Click to set the map to Home';
            controlDiv.appendChild(goHomeUI);
 
            // Set CSS for the control interior
            var goHomeText = document.createElement('DIV');
            goHomeText.style.fontFamily = 'Arial,sans-serif';
            goHomeText.style.fontSize = '12px';
            goHomeText.style.paddingLeft = '4px';
            goHomeText.style.paddingRight = '4px';
            goHomeText.innerHTML = '<b>Home</b>';
            goHomeUI.appendChild(goHomeText);
 
            // Set CSS for the setHome control border
            var setHomeUI = document.createElement('DIV');
            setHomeUI.style.backgroundColor = 'white';
            setHomeUI.style.borderStyle = 'solid';
            setHomeUI.style.borderWidth = '2px';
            setHomeUI.style.cursor = 'pointer';
            setHomeUI.style.textAlign = 'center';
            setHomeUI.title = 'Click to set Home to the current center';
            controlDiv.appendChild(setHomeUI);
 
            // Set CSS for the control interior
            var setHomeText = document.createElement('DIV');
            setHomeText.style.fontFamily = 'Arial,sans-serif';
            setHomeText.style.fontSize = '12px';
            setHomeText.style.paddingLeft = '4px';
            setHomeText.style.paddingRight = '4px';
            setHomeText.innerHTML = '<b>Set Home</b>';
            setHomeUI.appendChild(setHomeText);
 
            // Setup the click event listener for Home:
            // simply set the map to the control's current home property.
            google.maps.event.addDomListener(goHomeUI, 'click', function()
            {
                var currentHome = control.getHome();
                map.setCenter(currentHome);
            });
 
            // Setup the click event listener for Set Home:
            // Set the control's home to the current Map center.
            google.maps.event.addDomListener(setHomeUI, 'click', function()
            {
                var newHome = map.getCenter();
                control.setHome(newHome);
            });
        }
        function initialize()
        {
            var mapDiv = document.getElementById('map_canvas');
            var myOptions = {
                zoom: 12,
                center: chicago,
                mapTypeId: google.maps.MapTypeId.ROADMAP
            }
            map = new google.maps.Map(mapDiv, myOptions);
 
            // Create the DIV to hold the control and
            // call the HomeControl() constructor passing
            // in this DIV.
            var homeControlDiv = document.createElement('DIV');
            var homeControl = new HomeControl(homeControlDiv, map, chicago);
 
            homeControlDiv.index = 1;
            map.controls[google.maps.ControlPosition.TOP_RIGHT].push(homeControlDiv);
        }
    </script>
</head>
<body onload="initialize()">
    <div id="map_canvas">
    </div>
</body>
</html>

 

效果图如下：

 

谢谢浏览！

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