resize element in panel

[the_Chameleon]

Hello everybody,
I need your help.
how can i do if i want to change height of element in my view?
I use "chrome extension Window Resizer 1.7.0".
When i resize my page (to 320 x 480), the width of elements are ok but height doesn't change.
Why?
This is my code :

Ext.define('Atix.view.Param', {
    extend: 'Ext.Container',
    xtype : 'paramView',
    requires: ['Ext.Toolbar','Ext.Label','Ext.Button','Ext.field.Select', 'Ext.form.Panel', 'Ext.field.Checkbox'],
    config:{
        layout:'vbox',
  items:
  [
        {
             xtype: 'panel',
                layout:'vbox',
             items: [
                    {
                         xtype: 'label',
                            docked:'top',
                         html: 'Notifications'
                     },
                        {
                            xtype: 'fieldset',
                            docked:'top',
                            title: 'Choisissez le type de notification souhait&eacute',
                            id: 'paramBox',
                            items: [
                                     {
                                         xtype: 'checkboxfield',
                                         name : 'jobs',
                                         label: 'Offres d\'emplois',
                                         labelAlign : 'right',
                                         labelWidth:'70%'
                                     },
                                     {
                                         xtype: 'checkboxfield',
                                         name : 'actu',
                                         label: 'Actualités',
                                         labelAlign : 'right',
                                         labelWidth:'70%'
                                      },
                                      {
                                         xtype: 'checkboxfield',
                                         name : 'event',
                                         label: 'Evènements',
                                         labelAlign : 'right',
                                         labelWidth:'70%'
                                     }
                            ]
                        },
                        {
                            xtype: 'label',
                            docked:'top',
                            html: 'Localisation'
                        },
                        {
                            xtype: 'fieldset',
                            id:'localizOffre',
                            docked:'top',
                            title: 'Localisez les offres d\'emploi a proximité de chez vous',
                            items: [
                                {
                                    xtype: 'selectfield',
                                    options: [
                                        {text: "5km",  value: "5"},
                                        {text: "10km", value: "10"},
                                        {text: "15km", value: "15"}
                                    ],
                                    labelWidth:'50%',
                                    style: 'font-size: 75%'
                                }
                            ]
                        }
                 ]
            },
            {
                xtype: 'panel',
                layout:'vbox',
                items: [
                ]
            },
            {
                xtype: 'label',
                html: 'Atix sur le Web'
            } ,
            {
                xtype: 'itemReseau',
                flex:1,
                style: 'font-size: 75%'
            }    ]}
});

[mitchellsimoens]

You shouldn't use [QUOTE] for your code, you should use [CODE]