Roo/form/NumberField.js

/*
 * Based on:
 * Ext JS Library 1.1.1
 * Copyright(c) 2006-2007, Ext JS, LLC.
 *
 * Originally Released Under LGPL - original licence link has changed is not relivant.
 *
 * Fork - LGPL
 * <script type="text/javascript">
 */


/**
 * @class Roo.form.NumberField
 * @extends Roo.form.TextField
 * Numeric text field that provides automatic keystroke filtering and numeric validation.
 * @constructor
 * Creates a new NumberField
 * @param {Object} config Configuration options
 */
Roo.form.NumberField = function(config){
    Roo.form.NumberField.superclass.constructor.call(this, config);
};

Roo.extend(Roo.form.NumberField, Roo.form.TextField,  {
    /**
     * @cfg {String} fieldClass The default CSS class for the field (defaults to "x-form-field x-form-num-field")
     */
    fieldClass: "x-form-field x-form-num-field",
    /**
     * @cfg {Boolean} allowDecimals False to disallow decimal values (defaults to true)
     */
    allowDecimals : true,
    /**
     * @cfg {String} decimalSeparator Character(s) to allow as the decimal separator (defaults to '.')
     */
    decimalSeparator : ".",
    /**
     * @cfg {String} thousandSeparator Character(s) to allow as the thousand separator (defaults to '') - set to ',' for example
     */
    thousandSeparator : "",
    /**
     * @cfg {Number} decimalPrecision The maximum precision to display after the decimal separator (defaults to 2)
     */
    decimalPrecision : 2,
    /**
     * @cfg {Boolean} allowNegative False to prevent entering a negative sign (defaults to true)
     */
    allowNegative : true,
    /**
     * @cfg {Number} minValue The minimum allowed value (defaults to Number.NEGATIVE_INFINITY)
     */
    minValue : Number.NEGATIVE_INFINITY,
    /**
     * @cfg {Number} maxValue The maximum allowed value (defaults to Number.MAX_VALUE)
     */
    maxValue : Number.MAX_VALUE,
    /**
     * @cfg {String} minText Error text to display if the minimum value validation fails (defaults to "The minimum value for this field is {minValue}")
     */
    minText : "The minimum value for this field is {0}",
    /**
     * @cfg {String} maxText Error text to display if the maximum value validation fails (defaults to "The maximum value for this field is {maxValue}")
     */
    maxText : "The maximum value for this field is {0}",
    /**
     * @cfg {String} nanText Error text to display if the value is not a valid number.  For example, this can happen
     * if a valid character like '.' or '-' is left in the field with no number (defaults to "{value} is not a valid number")
     */
    nanText : "{0} is not a valid number",

    hiddenField : false,

    onRender : function(ct, position)
    {
        Roo.form.TextField.superclass.onRender.call(this, ct, position);

            //this.el.dom.removeAttribute('name'); 
        Roo.log("Changing name?");
        if (this.thousandSeparator != '') {
            this.el.dom.setAttribute('name', this.name + '____hidden___' );
            this.hiddenField = this.el.insertSibling({ tag:'input', type:'hidden', name: this.name },
                        'before', true);
            this.hiddenField.value = this.value ? this.parseValue(this.value) : '';
            this.el.on('blur', this.onBlur, this);
        }

            // prevent input submission



    },
     onBlur : function(){
        this.beforeBlur();
        if(!Roo.isOpera && this.focusClass){ // don't touch in Opera
            this.el.removeClass(this.focusClass);
        }
        this.hasFocus = false;
        if(this.validationEvent !== false && this.validateOnBlur && this.validationEvent != "blur"){
            this.validate();
        }
        var v = this.getValue();
        if(String(v) !== String(this.startValue)){
            this.setValue( this.parseValue(v));
            this.fireEvent('change', this, v, this.startValue);
        }
        this.fireEvent("blur", this);
    },

    // override name, so that it works with hidden field.
    getName: function(){
        if (this.thousandSeparator != '') {
            return this.name;
        }
        return Roo.form.TextField.superclass.getName.call(this);
    },
    // private
    initEvents : function(){

        var allowed = "0123456789";
        if(this.allowDecimals){
            allowed += this.decimalSeparator;
        }
        allowed += this.thousandSeparator;
        if(this.allowNegative){
            allowed += "-";
        }
        this.stripCharsRe = new RegExp('[^'+allowed+']', 'gi');
        var keyPress = function(e){
            var k = e.getKey();
            if(!Roo.isIE && (e.isSpecialKey() || k == e.BACKSPACE || k == e.DELETE)){
                return;
            }
            var c = e.getCharCode();
            if(allowed.indexOf(String.fromCharCode(c)) === -1){
                e.stopEvent();
            }
        };
        this.el.on("keypress", keyPress, this);
    },

    // private
    validateValue : function(value){
        if(!Roo.form.NumberField.superclass.validateValue.call(this, value)){
            return false;
        }
        if(value.length < 1){ // if it's blank and textfield didn't flag it then it's valid
             return true;
        }
        var num = this.parseValue(value);
        if(isNaN(num)){
            this.markInvalid(String.format(this.nanText, value));
            return false;
        }
        if(num < this.minValue){
            this.markInvalid(String.format(this.minText, this.minValue));
            return false;
        }
        if(num > this.maxValue){
            this.markInvalid(String.format(this.maxText, this.maxValue));
            return false;
        }
        return true;
    },

    getValue : function(){
        return this.fixPrecision(this.parseValue(Roo.form.NumberField.superclass.getValue.call(this)));
    },

    // private
    parseValue : function(value){
        value = parseFloat(String(value).replace(this.decimalSeparator, ".").split(this.thousandSeparator).join(''));
        return isNaN(value) ? '' : value;
    },

    // private
    fixPrecision : function(value){
        var nan = isNaN(value);
        if(!this.allowDecimals || this.decimalPrecision == -1 || nan || !value){
            return nan ? '' : value;
        }
        return parseFloat(value).toFixed(this.decimalPrecision);
    },

    setValue : function(v){
        v = this.fixPrecision(v);
        if(this.thousandSeparator != ''){
            v = Roo.util.Format.number(v, this.decimalPrecision, this.thousandSeparator);
        }
        Roo.form.NumberField.superclass.setValue.call(this, String(v).replace(".", this.decimalSeparator));
        if (this.hiddenField !== false) {
            this.hiddenField.value = v ? this.parseValue(v) : '';
        }


    },

    // private
    decimalPrecisionFcn : function(v){
        return Math.floor(v);
    },

    beforeBlur : function(){
        var v = this.parseValue(this.getRawValue());
        if(v){
            this.setValue(v);
        }
    }
});