Ext.form.FileUploadField = Ext.extend(Ext.form.TextField, {
	/**
	* @cfg {String} buttonText The button text to display on the upload button (defaults to
	* 'Browse...').  Note that if you supply a value for {@link #buttonCfg}, the buttonCfg.text
	* value will be used instead if available.
	*/
	buttonText: 'Browse...',
	/**
	* @cfg {Boolean} buttonOnly True to display the file upload field as a button with no visible
	* text field (defaults to false).  If true, all inherited TextField members will still be available.
	*/
	buttonOnly: false,
	/**
	* @cfg {Number} buttonOffset The number of pixels of space reserved between the button and the text field
	* (defaults to 3).  Note that this only applies if {@link #buttonOnly} = false.
	*/
	buttonOffset: 3,
	/**
	* @cfg {Object} buttonCfg A standard {@link Ext.Button} config object.
	*/

	// private
	readOnly: true,

	/**
	* @hide 
	* @method autoSize
	*/
	autoSize: Ext.emptyFn,

	// private
	initComponent: function() {
		Ext.form.FileUploadField.superclass.initComponent.call(this);

		this.addEvents(
		/**
		* @event fileselected
		* Fires when the underlying file input field's value has changed from the user
		* selecting a new file from the system file selection dialog.
		* @param {Ext.form.FileUploadField} this
		* @param {String} value The file value returned by the underlying file input field
		*/
            'fileselected'
        );
	},

	// private
	onRender: function(ct, position) {
		Ext.form.FileUploadField.superclass.onRender.call(this, ct, position);

		this.wrap = this.el.wrap({ cls: 'x-form-field-wrap x-form-file-wrap' });
		this.el.addClass('x-form-file-text');
		this.el.dom.removeAttribute('name');

		this.fileInput = this.wrap.createChild({
			id: this.getFileInputId(),
			name: this.name || this.getId(),
			cls: 'x-form-file',
			tag: 'input',
			type: 'file',
			size: 1
		});

		var btnCfg = Ext.applyIf(this.buttonCfg || {}, {
			text: this.buttonText
		});
		this.button = new Ext.Button(Ext.apply(btnCfg, {
			renderTo: this.wrap,
			cls: 'x-form-file-btn' + (btnCfg.iconCls ? ' x-btn-icon' : '')
		}));

		if (this.buttonOnly) {
			this.el.hide();
			this.wrap.setWidth(this.button.getEl().getWidth());
		}

		this.fileInput.on('change', function() {
			var v = this.fileInput.dom.value;
			this.setValue(v);
			this.fireEvent('fileselected', this, v);
		}, this);
	},

	// private
	getFileInputId: function() {
		return this.id + '-file';
	},

	// private
	onResize: function(w, h) {
		Ext.form.FileUploadField.superclass.onResize.call(this, w, h);

		this.wrap.setWidth(w);

		if (!this.buttonOnly) {
			var w = this.wrap.getWidth() - this.button.getEl().getWidth() - this.buttonOffset;
			this.el.setWidth(w);
		}
	},

	// private
	preFocus: Ext.emptyFn,

	// private
	getResizeEl: function() {
		return this.wrap;
	},

	// private
	getPositionEl: function() {
		return this.wrap;
	},

	// private
	alignErrorIcon: function() {
		this.errorIcon.alignTo(this.wrap, 'tl-tr', [2, 0]);
	}

});
Ext.reg('fileuploadfield', Ext.form.FileUploadField);