javascript - ExtJS 将 NumberField 扩展为 CurrencyField

Question

如何在 NumberField 中执行小数精度有一个非常好的答案:How do I force the display of a decimal in an ExtJS NumberField to a certain precision?。

但它只起到了一半的作用。我想多做 1 步并实现千位分隔符和美元符号(美国货币)。我尝试将 baseChars 扩展为“1234567890$”，但没有成功。

是否有人已经解决了这个问题或知道如何去做？

Answer 1

我昨天刚刚开发了您正在寻找的扩展。我也需要这种功能，现在是时候完成它了。

您可以阅读此博客中的帖子并在那里下载源代码:http://develtech.wordpress.com/2011/03/06/number-field-with-currency-symbol-thousand-separator-with-international-support

或

访问 extjs 论坛中的这个主题 http://www.sencha.com/forum/showthread.php?125937-Number-field-with-currency-symbol-thousand-separator-with-international-support&p=577701#post577701

希望对您有所帮助。

---

代码:

    /**
 * Copyright(c) 2011
 *
 * Licensed under the terms of the Open Source LGPL 3.0
 * http://www.gnu.org/licenses/lgpl.html
 * @author Greivin Britton, brittongr@gmail.com
 *     
 * @changes
 * No currency symbol by default    
 * No decimalPrecision in config
 * Supporting any character as thousand separator
 * Improved getFormattedValue
 * Removed unnecessary code to create format template, now using float.toFixed(this.decimalPrecission)    
 */

Ext.ux.NumericField = function(config){
    var defaultConfig = 
    {
        style: 'text-align:right;'
    };

    Ext.ux.NumericField.superclass.constructor.call(this, Ext.apply(defaultConfig, config));

    //Only if thousandSeparator doesn't exists is assigned when using decimalSeparator as the same as thousandSeparator
    if(this.useThousandSeparator && this.decimalSeparator == ',' && Ext.isEmpty(config.thousandSeparator))
        this.thousandSeparator = '.';
    else
        if(this.allowDecimals && this.thousandSeparator == '.' && Ext.isEmpty(config.decimalSeparator))
            this.decimalSeparator = ',';

    this.onFocus = this.onFocus.createSequence(this.onFocus);
};

Ext.extend(Ext.ux.NumericField, Ext.form.NumberField, 
{
    currencySymbol: null,
    useThousandSeparator: true,
    thousandSeparator: ',',
    alwaysDisplayDecimals: false,
    setValue: function(v){
       Ext.ux.NumericField.superclass.setValue.call(this, v);

       this.setRawValue(this.getFormattedValue(this.getValue()));
    },
    /**
     * No more using Ext.util.Format.number, Ext.util.Format.number in ExtJS versions
     * less thant 4.0 doesn't allow to use a different thousand separator than "," or "."
     * @param {Number} v
     */
    getFormattedValue: function(v){

        if (Ext.isEmpty(v) || !this.hasFormat()) 
            return v;
        else 
        {
            var neg = null;

            v = (neg = v < 0) ? v * -1 : v; 
            v = this.allowDecimals && this.alwaysDisplayDecimals ? v.toFixed(this.decimalPrecision) : v;

            if(this.useThousandSeparator)
            {
                if(this.useThousandSeparator && Ext.isEmpty(this.thousandSeparator))
                    throw ('NumberFormatException: invalid thousandSeparator, property must has a valid character.');

                if(this.thousandSeparator == this.decimalSeparator)
                    throw ('NumberFormatException: invalid thousandSeparator, thousand separator must be different from decimalSeparator.');

                var v = String(v);

                var ps = v.split('.');
                ps[1] = ps[1] ? ps[1] : null;

                var whole = ps[0];

                var r = /(\d+)(\d{3})/;

                var ts = this.thousandSeparator;

                while (r.test(whole)) 
                    whole = whole.replace(r, '$1' + ts + '$2');

                v = whole + (ps[1] ? this.decimalSeparator + ps[1] : '');
            }

            return String.format('{0}{1}{2}', (neg ? '-' : ''), (Ext.isEmpty(this.currencySymbol) ? '' : this.currencySymbol + ' '), v);
        }
    },
    /**
     * overrides parseValue to remove the format applied by this class
     */
    parseValue: function(v){
        //Replace the currency symbol and thousand separator
        return Ext.ux.NumericField.superclass.parseValue.call(this, this.removeFormat(v));
    },
    /**
     * Remove only the format added by this class to let the superclass validate with it's rules.
     * @param {Object} v
     */
    removeFormat: function(v){
        if (Ext.isEmpty(v) || !this.hasFormat()) 
            return v;
        else 
        {
            v = v.replace(this.currencySymbol + ' ', '');

            v = this.useThousandSeparator ? v.replace(new RegExp('[' + this.thousandSeparator + ']', 'g'), '') : v;
            //v = this.allowDecimals && this.decimalPrecision > 0 ? v.replace(this.decimalSeparator, '.') : v;

            return v;
        }
    },
    /**
     * Remove the format before validating the the value.
     * @param {Number} v
     */
    getErrors: function(v){
        return Ext.ux.NumericField.superclass.getErrors.call(this, this.removeFormat(v));
    },
    hasFormat: function()
    {
        return this.decimalSeparator != '.' || this.useThousandSeparator == true || !Ext.isEmpty(this.currencySymbol) || this.alwaysDisplayDecimals;    
    },
    /**
     * Display the numeric value with the fixed decimal precision and without the format using the setRawValue, don't need to do a setValue because we don't want a double
     * formatting and process of the value because beforeBlur perform a getRawValue and then a setValue.
     */
    onFocus: function(){
        this.setRawValue(this.removeFormat(this.getRawValue()));
    }
});
Ext.reg('numericfield', Ext.ux.NumericField);