[ModExt/ExtJS] Window prefill values from request ?

manageCompany: function(btn,e){
	location.href = '?a='+MODx.request.a+'&action=company&id='+this.menu.record.id;
}

tbar:[{
	xtype: "tbbutton",
	text: "New Article",
	tooltip: "Blabla tooltip",
	handler	: function() { 
		container.findById('your-form-id').getForm().setValues([
			{id:'content', value:'<p></p>'},
		]);
	});
}]

var container = new MODx.Window({
    items:{
        id: 'your-form-id',
        xtype: 'form',
        items: [{xtype:'textfield',id:'someId'}]
    }
});

{
		xtype: 'combo',
		valueField: 'id',
		displayField: 'title',
		renderer: function(value, metaData, record, rowIndex, colIndex, store) {
			//Do your Javscript thing
			return YOURVALUE; //YOURVALUE will be displayed
		},
}

Cispeo.window.createCompanyProject = function(config){
	config = config || {};
        <!-- extraction of id -->
	var t = location.search.substring(1).split('&');
	var f = [];
	for (var i=0; i<t.length; i++) {
		var x = t[i].split('=');
		f[x[0]]=f[1];
	}
	
	var myOwner = x[1];
	this.owner = myOwner;
	this.ident = config.ident || 'cpocproject'+Ext.id();
	
	Ext.applyIf(config,{
		title: _('cispeo.project_create'),
		id: this.ident,
		owner: this.owner,
		width: 600,
		url: Cispeo.config.connector_url,
                // send owner as param for creation
		baseParams: {
			owner:this.owner,
			action: 'mgr/project/create'
		},
		fields: [{
			name: 'owner',
			fieldLabel: myOwner // this one was just to be sure... 
			
		},{
			xtype: 'textfield',
			name: 'name',
			fieldLabel: _('name')
		}]
	});
	
	Cispeo.window.createCompanyProject.superclass.constructor.call(this,config);
};
Ext.extend(Cispeo.window.createCompanyProject,MODx.Window);
Ext.reg('cispeo-window-companyproject-create',Cispeo.window.createCompanyProject);

$obj = $modx->getObject('myObject',$_REQUEST['id']);
if (!$obj) return $modx->error->failure('My obj not found!');

$modx->regClientStartupHTMLBlock('<script type="text/javascript">
Ext.onReady(function() {
   MODx.load({
       xtype: 'my-panel-xtype'
       ,record: '.$modx->toJSON($obj->toArray()).'
   });
}</script>');

Cispeo.window.createCompanyProject = function(config){
	config = config || {};
	this.owner = MODx.request.id;
	this.ident = config.ident || 'cpocproject'+Ext.id();
	
	Ext.applyIf(config,{
		title: _('cispeo.project_create'),
		id: this.ident,
		width: 600,
		url: Cispeo.config.connector_url,
		baseParams: {
			owner:this.owner,
			action: 'mgr/project/create'
		},
		fields: [{
			xtype: 'statictextfield', // if I put 'hidden' instead, the owner value is not sent anymore
			style: 'display: none;', // I don't want to show an empty line so I set display to none
			name: 'owner'
		},{
			xtype: 'textfield',
			name: 'name',
			fieldLabel: _('name')
		}]
	});
	
	Cispeo.window.createCompanyProject.superclass.constructor.call(this,config);
};
Ext.extend(Cispeo.window.createCompanyProject,MODx.Window);
Ext.reg('cispeo-window-companyproject-create',Cispeo.window.createCompanyProject);