以下java script
会在google
地图中显示标记。这里我添加了Control
按钮到LEFT_BOTTOM
。我的出局显示所有马克。但是当我点击Control
按钮时,我需要从数据库中过滤一些标记。我应该怎么做?
<style type="text/css">
body { font: normal 10pt Helvetica, Arial; }
#map { width: 100%; height: 100%; border: 0px; padding: 0px; }
</style>
<script src="http://maps.google.com/maps/api/js?v=3&sensor=false" type="text/javascript"></script>
<script type="text/javascript">
var icon = new google.maps.MarkerImage("images/icons/icon.png",
new google.maps.Size(32, 32), new google.maps.Point(0, 0),
new google.maps.Point(16, 32));
var center = null;
var map = null;
var currentPopup;
var bounds = new google.maps.LatLngBounds();
//adding multiple marker
function addMarker(lat, lng, info) {
var pt = new google.maps.LatLng(lat, lng);
bounds.extend(pt);
var marker = new google.maps.Marker({
position: pt,
icon: icon,
map: map});
var popup = new google.maps.InfoWindow({
content: info,
maxWidth: 300 });
google.maps.event.addListener(marker, "click", function() {
if (currentPopup != null) {
currentPopup.close();
currentPopup = null;
}
popup.open(map, marker);
currentPopup = popup;});
google.maps.event.addListener(popup, "closeclick", function() {
map.panTo(center);
currentPopup = null;
});
}
function HomeControl(controlDiv, map) {
// 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 controlUI = document.createElement('div');
controlUI.style.backgroundColor = 'white';
controlUI.style.borderStyle = 'solid';
controlUI.style.borderWidth = '2px';
controlUI.style.cursor = 'pointer';
controlUI.style.textAlign = 'center';
controlUI.title = 'Click to Filter';
controlDiv.appendChild(controlUI);
// Set CSS for the control interior
var controlText = document.createElement('div');
controlText.style.fontFamily = 'Arial,sans-serif';
controlText.style.fontSize = '12px';
controlText.style.paddingLeft = '4px';
controlText.style.paddingRight = '4px';
controlText.innerHTML = '<b>GYM</b>';
controlUI.appendChild(controlText);
// Setup the click event listeners: simply set the map to
google.maps.event.addDomListener(controlUI, 'click', function() {
//need to filter Markers
//$query = mysql_query("SELECT * FROM mytable where availability = false");
});
}
function initMap() {
map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(0, 0),
zoom: 14,
mapTypeId: google.maps.MapTypeId.ROADMAP,
mapTypeControl: false,
mapTypeControlOptions: {
style: google.maps.MapTypeControlStyle.HORIZONTAL_BAR
},
navigationControl: true,
navigationControlOptions: {
style: google.maps.NavigationControlStyle.SMALL}});
<?php
$query = mysql_query("SELECT * FROM mytable ");
while ($row = mysql_fetch_array($query)){
$regno = $row['id'];
$latitude = $row['latitude'];
$longitude = $row['longitude'];
echo "addMarker($longitude, $latitude,'<b>$id</b>');";
}
?>
center = bounds.getCenter();
map.fitBounds(bounds);
var homeControlDiv = document.createElement('div');
var homeControl = new HomeControl(homeControlDiv, map);
homeControlDiv.index = 1;
map.controls[google.maps.ControlPosition.LEFT_BOTTOM].push(homeControlDiv);
}
</script>
----
<body onLoad="initMap()" style="margin:0px; border:0px; padding:0px;">
答案 0 :(得分:0)
setMap(null)
。这是一些快速代码,以便您明白:
// Create an array of markers
var markers = [];
// Create your map and all the stuff you need
// Bind the event listener
google.maps.event.addDomListener(controlUI, 'click', function() {
// First delete all your markers
deleteMarkers();
// Query your database again and add each marker as you did in the first place
});
// Function to delete the markers
function deleteMarkers() {
for (var i = 0; i < markers.length; i++) {
// Remove each marker from map
markers[i].setMap(null);
}
}
function addMarker() {
// Create each marker object
var marker = new google.maps.Marker({
map: map,
// Your other marker properties here
});
// Push new marker to the markers array
markers.push(marker);
}