Google Maps Api 3 Remove Selected Marker Only

问题:

I've 2 function as below:

function addMarker() {
    marker = new google.maps.Marker({
        position: Gpoint,
        map: map,
        draggable: true,
        animation: google.maps.Animation.DROP
    });
    map.panTo(Gpoint);

    google.maps.event.addListener(marker, "rightclick", 
    function (point) { 
    showContextMarker(point.latLng); } ); 
    $('.contextmenu').remove();
};

function delMarker() { marker.setMap(null); $('.contextmenu').remove(); };

So, as may understand I have a Context Menu having "Delete Marker" option on it. I am binding a "rightclick" listener during adding a marker, to show this menu.

Everything is working without any problem till this moment.

But when I try to click on a marker to delete; it is effecting only the last added marker. When I try again; nothing happens.

So my idea is to get the clicked marker's id (or something that may well be useful) and run this deleting function according to this.

Briefly; I want to delete the marker that I clicked on, from a map having multiple markers.

Do you have any approach to solve this problem ?

Thanks in advance!

SOLVED!

Here is the solution. Thank you Fatih. it was impossible without your guidance:

var id;
var markers = {};
var addMarker = function () {
    marker = new google.maps.Marker({ 
        position: Gpoint,
        map: map,
        draggable: true,
        animation: google.maps.Animation.DROP
    });
    map.panTo(Gpoint);
    id = marker.__gm_id
    markers[id] = marker; 

    google.maps.event.addListener(marker, "rightclick", function (point) { id = this.__gm_id; delMarker(id) });
}

var delMarker = function (id) {
    marker = markers[id]; 
    marker.setMap(null);
}

Calling delete function by: delMarker(id) Ps: "Right clicking is enough on this case"

Thank you!

回答1:

Working Sample on jsFiddle

---

Google Maps doesn't manage your markers. So all your markers should be managed by yourself.

Make a global marker object and push all markers to this object. And give unique id to each marker when getting a marker instance. Then when you want to delete a marker take its id and find this marker in global marker object and finally call this marker instance's setMap method with passing null argument.

Also I've added a demo that works on jsFiddle. Code is heavily documented.

Your psuedo code should be like this. For more detailed code please look the demo.

var currentId = 0;
var uniqueId = function() {
    return ++currentId;
}

var markers = {};
var createMarker = function() {
    var id = uniqueId(); // get new id
    var marker = new google.maps.Marker({ // create a marker and set id
        id: id,
        position: Gpoint,
        map: map,
        draggable: true,
        animation: google.maps.Animation.DROP
    });
    markers[id] = marker; // cache created marker to markers object with id as its key
    return marker;
}
var deleteMarker = function(id) {
    var marker = markers[id]; // find the marker by given id
    marker.setMap(null);
}

回答2:

Complementing the @Fatih answer you should manage the markers. For example you could add each marker in a array and then to remove, you could find this marker into the array and set the val in the map null.

回答3:

Just pass your marker in the rightclick function. For example:

var marker = new google.maps.Marker({
    position: event.latLng,
    map: map,
    draggable: true,
    title: 'Hello World!'
});
google.maps.event.addListener(marker, "rightclick", function (point) {delMarker(marker)});

And make the function look this:

var delMarker = function (markerPar) {
    markerPar.setMap(null);
}

Your markers will be removeable on the rightclicks.

回答4:

this worked for me:

a second currentId, if you have a better idea, let me know

var actualMarkerId = 0;
var currentId = 0;



    if (actualMarkerId>0) {
        deleteMarker(actualMarkerId);
        console.log(actualMarkerId);
    }
    var id = uniqueId(); // get new id
    actualMarkerId = id;

回答5:

For minimal changes

var newid=0;

for (var index in results){

var marker = new google.maps.Marker({

map: map,
icon: image,

__gm_id: = newid+1,

});
}

Now marker['__gm_id'] still has a value