ExtjsFileUpload

hi all, i'm junior java developer and i have task with file uploading. So the question is how can i upload files dinamically without submit?(button)

at now i'm using sth like this :

Code:

  var uploadButton = Ext.create('Ext.Button', {
            ui: 'primary-small',
            style: 'margin-left:120px;',
            handler: function () {
                if (form.isValid()) {
                    //if(form.)
                    form.submit({
                        url: '',
                        method: 'POST',
                        success: function (form, response) {
                            debugger;
                            console.log(response);
                            if (!Ext.isEmpty(response) && !Ext.isEmpty(response.response.responseText)) {
                                var result = Ext.decode(response.response.responseText);
                                debugger;
                                result.files.forEach(function (file) {
                                    console.log(file.name);
                                    debugger;
                                    if (file.name != null && file.name != '') {
                                        me.filesStore.add({
                                            fileName: file.name,
                                            fileId: file.id
                                        });
                                    }
                                });
                            }
                        },
                        failure: function (form, response) {
                            debugger;
                            ...
                        }
                    })
                }


            }
        });

var form = Ext.create('Ext.form.Panel', {            flex: 1,
            layout: {
                type: 'hbox',
                align: 'stretch'},
            items: [
                {
                    xtype: 'filefield',
                    name: 'file',
                    //buttonOnly: true,
                    isFileUpload:true,
                    allowBlank: false,
                    buttonConfig: {
                        ui: 'primary-small'
                    },
                    msgTarget: 'under',
                    listeners: {
                        change: function (fld, value) {
                            var newValue = value.replace(/C:\\fakepath\\/g, '');
                            fld.setRawValue(newValue);


                        },
                        afterrender: function (cmp) {
                            cmp.fileInputEl.set({
                                multiple: 'multiple'
                            });
                        }
                    }
                },
                uploadButton
            ]
        });

but it is not allowable, i need to add files immediately after choose dialog

Thanks