TextField.js
/**
* @class Ext.form.TextField
* @extends Ext.form.Field
* Basic text field. Can be used as a direct replacement for traditional text inputs, or as the base
* class for more sophisticated input controls (like {@link Ext.form.TextArea} and {@link Ext.form.ComboBox}).
* @constructor
* Creates a new TextField
* @param {Object} config Configuration options
*/
Ext.form.TextField = function(config){
Ext.form.TextField.superclass.constructor.call(this, config);
this.addEvents({
/**
* @event autosize
* Fires when the autosize function is triggered. The field may or may not have actually changed size
* according to the default logic, but this event provides a hook for the developer to apply additional
* logic at runtime to resize the field if needed.
* @param {Ext.form.Field} this This text field
* @param {Number} width The new field width
*/
autosize : true
});
};
Ext.extend(Ext.form.TextField, Ext.form.Field, {
/**
* @cfg {Boolean} grow True if this field should automatically grow and shrink to its content
*/
grow : false,
/**
* @cfg {Number} growMin The minimum width to allow when grow = true (defaults to 30)
*/
growMin : 30,
/**
* @cfg {Number} growMax The maximum width to allow when grow = true (defaults to 800)
*/
growMax : 800,
/**
* @cfg {String} vtype A validation type name as defined in {@link Ext.form.VTypes} (defaults to null)
*/
vtype : null,
/**
* @cfg {String} maskRe An input mask regular expression that will be used to filter keystrokes that don't match (defaults to null)
*/
maskRe : null,
/**
* @cfg {Boolean} disableKeyFilter True to disable input keystroke filtering (defaults to false)
*/
disableKeyFilter : false,
/**
* @cfg {Boolean} allowBlank False to validate that the value length > 0 (defaults to true)
*/
allowBlank : true,
/**
* @cfg {Number} minLength Minimum input field length required (defaults to 0)
*/
minLength : 0,
/**
* @cfg {Number} maxLength Maximum input field length allowed (defaults to Number.MAX_VALUE)
*/
maxLength : Number.MAX_VALUE,
/**
* @cfg {String} minLengthText Error text to display if the minimum length validation fails (defaults to "The minimum length for this field is {minLength}")
*/
minLengthText : "The minimum length for this field is {0}",
/**
* @cfg {String} maxLengthText Error text to display if the maximum length validation fails (defaults to "The maximum length for this field is {maxLength}")
*/
maxLengthText : "The maximum length for this field is {0}",
/**
* @cfg {Boolean} selectOnFocus True to automatically select any existing field text when the field receives input focus (defaults to false)
*/
selectOnFocus : false,
/**
* @cfg {String} blankText Error text to display if the allow blank validation fails (defaults to "This field is required")
*/
blankText : "This field is required",
/**
* @cfg {Function} validator A custom validation function to be called during field validation (defaults to null).
* If available, this function will be called only after the basic validators all return true, and will be passed the
* current field value and expected to return boolean true if the value is valid or a string error message if invalid.
*/
validator : null,
/**
* @cfg {RegExp} regex A JavaScript RegExp object to be tested against the field value during validation (defaults to null).
* If available, this regex will be evaluated only after the basic validators all return true, and will be passed the
* current field value. If the test fails, the field will be marked invalid using {@link #regexText}.
*/
regex : null,
/**
* @cfg {String} regexText The error text to display if {@link #regex} is used and the test fails during validation (defaults to "")
*/
regexText : "",
/**
* @cfg {String} emptyText The default text to display in an empty field (defaults to null).
*/
emptyText : null,
/**
* @cfg {String} emptyClass The CSS class to apply to an empty field to style the {@link #emptyText} (defaults to
* 'x-form-empty-field'). This class is automatically added and removed as needed depending on the current field value.
*/
emptyClass : 'x-form-empty-field',
// private
initEvents : function(){
Ext.form.TextField.superclass.initEvents.call(this);
if(this.validationEvent == 'keyup'){
this.validationTask = new Ext.util.DelayedTask(this.validate, this);
this.el.on('keyup', this.filterValidation, this);
}
else if(this.validationEvent !== false){
this.el.on(this.validationEvent, this.validate, this, {buffer: this.validationDelay});
}
if(this.selectOnFocus || this.emptyText){
this.on("focus", this.preFocus, this);
if(this.emptyText){
this.on('blur', this.postBlur, this);
this.applyEmptyText();
}
}
if(this.maskRe || (this.vtype && this.disableKeyFilter !== true && (this.maskRe = Ext.form.VTypes[this.vtype+'Mask']))){
this.el.on("keypress", this.filterKeys, this);
}
if(this.grow){
this.el.on("keyup", this.onKeyUp, this, {buffer:50});
this.el.on("click", this.autoSize, this);
}
},
filterValidation : function(e){
if(!e.isNavKeyPress()){
this.validationTask.delay(this.validationDelay);
}
},
// private
onKeyUp : function(e){
if(!e.isNavKeyPress()){
this.autoSize();
}
},
/**
* Resets the current field value to the originally-loaded value and clears any validation messages.
* Also adds emptyText and emptyClass if the original value was blank.
*/
reset : function(){
Ext.form.TextField.superclass.reset.call(this);
this.applyEmptyText();
},
applyEmptyText : function(){
if(this.rendered && this.emptyText && this.getRawValue().length < 1){
this.setRawValue(this.emptyText);
this.el.addClass(this.emptyClass);
}
},
// private
preFocus : function(){
if(this.emptyText){
if(this.getRawValue() == this.emptyText){
this.setRawValue('');
}
this.el.removeClass(this.emptyClass);
}
if(this.selectOnFocus){
this.el.dom.select();
}
},
// private
postBlur : function(){
this.applyEmptyText();
},
// private
filterKeys : function(e){
var k = e.getKey();
if(!Ext.isIE && (e.isNavKeyPress() || k == e.BACKSPACE || (k == e.DELETE && e.button == -1))){
return;
}
var c = e.getCharCode();
if(!this.maskRe.test(String.fromCharCode(c) || '')){
e.stopEvent();
}
},
setValue : function(v){
if(this.emptyText && v !== undefined && v !== null && v !== ''){
this.el.removeClass(this.emptyClass);
}
Ext.form.TextField.superclass.setValue.apply(this, arguments);
},
/**
* Validates a value according to the field's validation rules and marks the field as invalid
* if the validation fails
* @param {Mixed} value The value to validate
* @return {Boolean} True if the value is valid, else false
*/
validateValue : function(value){
if(value.length < 1 || value === this.emptyText){ // if it's blank
if(this.allowBlank){
this.clearInvalid();
return true;
}else{
this.markInvalid(this.blankText);
return false;
}
}
if(value.length < this.minLength){
this.markInvalid(String.format(this.minLengthText, this.minLength));
return false;
}
if(value.length > this.maxLength){
this.markInvalid(String.format(this.maxLengthText, this.maxLength));
return false;
}
if(this.vtype){
var vt = Ext.form.VTypes;
if(!vt[this.vtype](value)){
this.markInvalid(this.vtypeText || vt[this.vtype +'Text']);
return false;
}
}
if(typeof this.validator == "function"){
var msg = this.validator(value);
if(msg !== true){
this.markInvalid(msg);
return false;
}
}
if(this.regex && !this.regex.test(value)){
this.markInvalid(this.regexText);
return false;
}
return true;
},
/**
* Selects text in this field
* @param {Number} start （可选） The index where the selection should start (defaults to 0)
* @param {Number} end （可选） The index where the selection should end (defaults to the text length)
*/
selectText : function(start, end){
var v = this.getRawValue();
if(v.length > 0){
start = start === undefined ? 0 : start;
end = end === undefined ? v.length : end;
var d = this.el.dom;
if(d.setSelectionRange){
d.setSelectionRange(start, end);
}else if(d.createTextRange){
var range = d.createTextRange();
range.moveStart("character", start);
range.moveEnd("character", v.length-end);
range.select();
}
}
},
/**
* Automatically grows the field to accomodate the width of the text up to the maximum field width allowed.
* This only takes effect if grow = true and fires the autosize event.
*/
autoSize : function(){
if(!this.grow || !this.rendered){
return;
}
if(!this.metrics){
this.metrics = Ext.util.TextMetrics.createInstance(this.el);
}
var el = this.el;
var v = el.dom.value + " ";
var w = Math.min(this.growMax, Math.max(this.metrics.getWidth(v) + /* add extra padding */ 10, this.growMin));
this.el.setWidth(w);
this.fireEvent("autosize", this, w);
}
});
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