API Google map v3:在zoom_changed上更改标记的大小 [英] API Google map v3 : change markers' size on zoom_changed
问题描述
我在Google Maps API v3上需要一些帮助。
我有一张带有标记(图片)的地图,来自数据库的信息。
我想在更改缩放比例时调整标记大小,但我的代码不会' t工作(图片消失,由默认图标取代)。你能帮我看看有什么不对吗?
这是我的代码:
//这部分
var marker = new google.maps.Marker({
map:map,
icon:new google.maps.MarkerImage(../ images / installateurs /<?php echo $ row_artisans ['photo0'];?>,
new google.maps.Size(40 ,53.2),
new google.maps.Point(0,0),
new google.maps.Point(0,0),
google.maps.Size(40,53.2 )
),
position:new google.maps.LatLng(<?php echo $ row_artisans ['Lat'];?> ;,,<?php echo $ row_artisans ['Lng']; ?>)
});
//第二部分问题出在哪里(这个侦听器刚好在创建地图之后放置,在渲染之前)
google.maps.event.addListener(map,'zoom_changed',function(){
var largeur = 20 +(5 *(map.getZoom() - 9));
var ratio = largeur / 40;
var hauteur = 26.6 * ratio;
for(i = 0; i< markers.length; i ++){
var icon = markers [i] .getIcon();
markers [i] .setIcon(
icon .url,
new google.maps.Size(largeur,hauteur),
new google.maps.Point(0,0),
new google.maps.Point(0,0) ,
new google.maps.Size(largeur,hauteur)
);
}
});
感谢您的帮助!
根据文档
a>, setIcon
或者接受一个字符串或一个 MarkerImage
对象。最初你设置了一个 MarkerImage
,但是在你的监听器代码中,你不会构造 MarkerImage
。尝试这样的代替:
for(i = 0; i< markers.length; i ++){
var icon = markers [i] .getIcon();
markers [i] .setIcon(new google.maps.MarkerImage(
icon.url,
google.maps.Size(largeur,hauteur),
google.maps .Point(0,0),
new google.maps.Point(0,0),
new google.maps.Size(largeur,hauteur))
);
}
I need some help on the Google Maps API v3.
I have a map with markers (which are pictures), informations from a database. The pictures and the map are ok at this time.
I would like to resize the markers when changing the zoom, but my code doesn't work (pictures disappear, replaced by the default icon). Could you help me to see what's wrong ?
Here's my code :
// This part is ok
var marker = new google.maps.Marker({
map: map,
icon: new google.maps.MarkerImage("../images/installateurs/<?php echo $row_artisans['photo0']; ?>",
new google.maps.Size(40, 53.2),
new google.maps.Point(0, 0),
new google.maps.Point(0, 0),
new google.maps.Size(40, 53.2)
),
position: new google.maps.LatLng(<?php echo $row_artisans['Lat']; ?>, <?php echo $row_artisans['Lng']; ?>)
});
// Second part where's the problem (this listener is placed just after creating the map, before rendering it)
google.maps.event.addListener(map, 'zoom_changed', function() {
var largeur = 20 + (5 *(map.getZoom() - 9));
var ratio = largeur / 40;
var hauteur = 26.6 * ratio;
for(i=0; i< markers.length; i++ ) {
var icon = markers[i].getIcon();
markers[i].setIcon(
icon.url,
new google.maps.Size(largeur, hauteur),
new google.maps.Point(0, 0),
new google.maps.Point(0, 0),
new google.maps.Size(largeur, hauteur)
);
}
});
Thanks for your help !
According to the docs, setIcon
either takes a string or a MarkerImage
object. Initially you set a MarkerImage
, but in your listener code, you do not construct a MarkerImage
. Try something like this instead:
for(i=0; i< markers.length; i++ ) {
var icon = markers[i].getIcon();
markers[i].setIcon(new google.maps.MarkerImage(
icon.url,
new google.maps.Size(largeur, hauteur),
new google.maps.Point(0, 0),
new google.maps.Point(0, 0),
new google.maps.Size(largeur, hauteur))
);
}
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