NumberField.js
Ext.form.NumberField = function(config){
Ext.form.NumberField.superclass.constructor.call(this, config);
};
Ext.extend(Ext.form.NumberField, Ext.form.TextField, {
fieldClass: 'x-form-field x-form-num-field',
initEvents : function(){
Ext.form.NumberField.superclass.initEvents.call(this);
var allowed = "0123456789";
if(this.allowDecimals){
allowed += this.decimalSeparator;
}
if(this.allowNegative){
allowed += '-';
}
var keyPress = function(e){
var k = e.getKey();
if(!Ext.isIE && (e.isNavKeyPress() || 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);
},
validateValue : function(value){
if(!Ext.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;
}
if(!(/\d+/.test(value))){
this.markInvalid(String.format(this.nanText, value));
return false;
}
var num = this.parseValue(value);
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;
},
parseValue : function(value){
return parseFloat(String(value).replace(this.decimalSeparator, '.'));
},
fixPrecision : function(value){
if(!this.allowDecimals || this.decimalPrecision == -1 || isNaN(value) || value == 0 || !value){
return value;
}
// this should work but doesn't due to precision error in JS
// var scale = Math.pow(10, this.decimalPrecision);
// var fixed = this.decimalPrecisionFcn(value * scale);
// return fixed / scale;
//
// so here's our workaround:
var scale = Math.pow(10, this.decimalPrecision+1);
var fixed = this.decimalPrecisionFcn(value * scale);
fixed = this.decimalPrecisionFcn(fixed/10);
return fixed / (scale/10);
},
allowDecimals : true,
decimalSeparator : '.',
decimalPrecision : 2,
decimalPrecisionFcn : function(v){
return Math.floor(v);
},
allowNegative : true,
minValue : Number.NEGATIVE_INFINITY,
maxValue : Number.MAX_VALUE,
minText : 'The minimum value for this field is {0}',
maxText : 'The maximum value for this field is {0}',
nanText : '{0} is not a valid number'
});
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