Have just one InfoWindow open in Google Maps API v3

Question

I need to have only one InfoWindow open on my Google Map. I need to close all other InfoWindows before I open a new one.

Can someone show me how to do this?

Answer 1

Declare a globar var selectedInfoWindow; and use it to hold the opened info window:

var infoWindow = new google.maps.InfoWindow({
    content: content
});

// Open the infowindow on marker click
google.maps.event.addListener(marker, "click", function() {
    //Check if there some info window selected and if is opened then close it
    if (selectedInfoWindow != null && selectedInfoWindow.getMap() != null) {
        selectedInfoWindow.close();
        //If the clicked window is the selected window, deselect it and return
        if (selectedInfoWindow == infoWindow) {
            selectedInfoWindow = null;
            return;
        }
    }
    //If arrive here, that mean you should open the new info window 
    //because is different from the selected
    selectedInfoWindow = infoWindow;
    selectedInfoWindow.open(map, marker);
});