/*
This file is part of Ext JS 4.2

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

Commercial Usage
Licensees holding valid commercial licenses may use this file in accordance with the Commercial
Software License Agreement provided with the Software or, alternatively, in accordance with the
terms contained in a written agreement between you and Sencha.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-09-18 17:18:59 (940c324ac822b840618a3a8b2b4b873f83a1a9b1)
*/
/**
 * Layout class for {@link Ext.form.field.ComboBox} fields. Handles sizing the input field.
 * @private
 */
Ext.define('Ext.layout.component.field.ComboBox', {
    extend: 'Ext.layout.component.field.Trigger',
    alias: 'layout.combobox',
    requires: ['Ext.util.TextMetrics'],

    type: 'combobox',

    startingWidth: null,

    getTextWidth: function () {
        var me = this,
            owner = me.owner,
            store = owner.store,
            field = owner.displayField,
            storeLn = store.data.length,
            value = '',
            i = 0, n = 0, ln, item, width;

        for (; i < storeLn; i++) {
            item = store.getAt(i).data[field];
            ln = item.length;
            // compare the current item's length with the current longest length and store the value
            if (ln > n) {
                n = ln;
                value = item;
            }
        }

        width = Math.max(me.callParent(arguments), owner.inputEl.getTextWidth(value + owner.growAppend));

        // it's important to know the starting width else the inputEl could be resized smaller than the boundlist
        // NOTE that when removing items from the store that the startingWidth needs to be recalculated
        if (!me.startingWidth || owner.removingRecords) {
            me.startingWidth = width;

            // also, if the width is less than growMin reset the default boundlist width
            // or it will appear wider than the component if the trigger is clicked
            if (width < owner.growMin) {
                owner.defaultListConfig.minWidth = owner.growMin;
            }

            owner.removingRecords = false;
        }
 
        // only resize if the new width is greater than the starting width
        return (width < me.startingWidth) ? me.startingWidth : width;
    }
});
