EXTJS Google Map are blank - google-maps

Question

I am using GmapPanelv3.js. I can see the zooming and everything, but how come the map is blank? Here is an example http://jsfiddle.net/anthor/4aAKL/3/
Ext.onReady(function() {
var w = Ext.create('Ext.window.Window', {
title: 'Gmap',
height: 400,
width: 600,
layout: 'border',
items: [
{
title: 'Message List',
region: 'south',
height: 50,
split: true,
collapsible: true,
margins: '0 5 5 5',
collapsed: true
},{
region: 'west',
title: 'Tree',
collapsible: true,
width: 100,
items: [
{
xtype: 'button',
text: 'add',
handler: addInfoWindow // reference to event handler function
}]
},{
xtype: 'gmappanel',
region: 'center',
cls: 'reset-box-sizing',
mapConfOpts:['enableScrollWheelZoom','enableDoubleClickZoom','enableDragging'],
mapControls: ['GSmallMapControl','GMapTypeControl','NonExistantControl'],
setCenter: {
lat: 3.951941,
long: 102.052002
}
}
]
});
/**
* Just example, do not write code like this!
* GMApPanel source code
* http://docs.sencha.com/extjs/4.2.0/extjs-build/examples/ux/GMapPanel.js
*/
// get the map reference
var map = w.down('gmappanel');
function openInfoWindow(content, marker) {
// create a info window
var infowindow = new google.maps.InfoWindow({
content: content,
size: new google.maps.Size(50,50)
});
infoBubble = new InfoBubble({
content: '<div class="example">Some label</div>',
//position: new google.maps.LatLng(53.5267, newlong),
shadowStyle: 1,
padding: 10,
borderRadius: 5,
minWidth: 200,
borderWidth:1,
//borderColor: '#2c2c2c',
disableAutoPan: true,
hideCloseButton: false,
backgroundClassName: 'example',
//arrowSize: 0,
//arrowPosition:7,
//arrowStyle:3
});
infoBubble.open(map.gmap,marker);
var div = document.createElement('DIV');
div.innerHTML = 'Hello';
infoBubble.addTab('A Tab', div);
infoBubble.addTab('A Tab', div);
// All GMapPanel instances has the reference to the underlying googlemap object
// porperty name `gmap`.
//infowindow.open(map.gmap, marker);
}
function addInfoWindow() {
// uses GMapPanel `addMarker` method to create a marker and attached it to tree.
// Detailes - look at the source code of GMapPanel
var marker = map.addMarker({
lat: 53.5267,
lng: -1.13330,
title: 'Marker',
// listeners can be added via configuration or after create
// using standard google maps API, i.e.
// google.maps.event.addListener(marker, 'click', function() {...})
listeners: {
click: function() {
openInfoWindow('hello', marker);
}
}
});
}
w.show();
});

Answer 1

i just change
setCenter: {
'lat': 3.951941,
'lng': 102.052002,
}
all problem are solved!