/*
* Ext JS Library 2.2.1
* Copyright(c) 2006-2009, Ext JS, LLC.
* licensing@extjs.com
* 
* http://extjs.com/license
*/

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);