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276 lines
10 KiB
JavaScript
276 lines
10 KiB
JavaScript
define("dijit/form/NumberTextBox", [
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"dojo/_base/declare", // declare
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"dojo/_base/lang", // lang.hitch lang.mixin
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"dojo/number", // number._realNumberRegexp number.format number.parse number.regexp
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"./RangeBoundTextBox"
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], function(declare, lang, number, RangeBoundTextBox){
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// module:
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// dijit/form/NumberTextBox
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var NumberTextBoxMixin = declare("dijit.form.NumberTextBoxMixin", null, {
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// summary:
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// A mixin for all number textboxes
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// tags:
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// protected
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// Override ValidationTextBox.pattern.... we use a reg-ex generating function rather
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// than a straight regexp to deal with locale (plus formatting options too?)
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pattern: number.regexp,
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/*=====
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// constraints: NumberTextBox.__Constraints
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// Despite the name, this parameter specifies both constraints on the input
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// (including minimum/maximum allowed values) as well as
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// formatting options like places (the number of digits to display after
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// the decimal point).
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constraints: {},
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======*/
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// value: Number
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// The value of this NumberTextBox as a Javascript Number (i.e., not a String).
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// If the displayed value is blank, the value is NaN, and if the user types in
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// an gibberish value (like "hello world"), the value is undefined
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// (i.e. get('value') returns undefined).
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//
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// Symmetrically, set('value', NaN) will clear the displayed value,
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// whereas set('value', undefined) will have no effect.
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value: NaN,
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// editOptions: [protected] Object
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// Properties to mix into constraints when the value is being edited.
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// This is here because we edit the number in the format "12345", which is
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// different than the display value (ex: "12,345")
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editOptions: { pattern: '#.######' },
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/*=====
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_formatter: function(value, options){
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// summary:
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// _formatter() is called by format(). It's the base routine for formatting a number,
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// as a string, for example converting 12345 into "12,345".
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// value: Number
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// The number to be converted into a string.
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// options: number.__FormatOptions?
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// Formatting options
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// tags:
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// protected extension
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return "12345"; // String
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},
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=====*/
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_formatter: number.format,
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postMixInProperties: function(){
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this.inherited(arguments);
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this._set("type", "text"); // in case type="number" was specified which messes up parse/format
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},
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_setConstraintsAttr: function(/*Object*/ constraints){
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var places = typeof constraints.places == "number"? constraints.places : 0;
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if(places){ places++; } // decimal rounding errors take away another digit of precision
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if(typeof constraints.max != "number"){
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constraints.max = 9 * Math.pow(10, 15-places);
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}
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if(typeof constraints.min != "number"){
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constraints.min = -9 * Math.pow(10, 15-places);
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}
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this.inherited(arguments, [ constraints ]);
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if(this.focusNode && this.focusNode.value && !isNaN(this.value)){
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this.set('value', this.value);
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}
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},
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_onFocus: function(){
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if(this.disabled){ return; }
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var val = this.get('value');
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if(typeof val == "number" && !isNaN(val)){
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var formattedValue = this.format(val, this.constraints);
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if(formattedValue !== undefined){
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this.textbox.value = formattedValue;
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}
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}
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this.inherited(arguments);
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},
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format: function(/*Number*/ value, /*number.__FormatOptions*/ constraints){
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// summary:
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// Formats the value as a Number, according to constraints.
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// tags:
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// protected
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var formattedValue = String(value);
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if(typeof value != "number"){ return formattedValue; }
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if(isNaN(value)){ return ""; }
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// check for exponential notation that dojo/number.format() chokes on
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if(!("rangeCheck" in this && this.rangeCheck(value, constraints)) && constraints.exponent !== false && /\de[-+]?\d/i.test(formattedValue)){
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return formattedValue;
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}
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if(this.editOptions && this.focused){
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constraints = lang.mixin({}, constraints, this.editOptions);
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}
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return this._formatter(value, constraints);
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},
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/*=====
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_parser: function(value, constraints){
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// summary:
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// Parses the string value as a Number, according to constraints.
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// value: String
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// String representing a number
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// constraints: number.__ParseOptions
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// Formatting options
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// tags:
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// protected
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return 123.45; // Number
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},
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=====*/
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_parser: number.parse,
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parse: function(/*String*/ value, /*number.__FormatOptions*/ constraints){
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// summary:
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// Replaceable function to convert a formatted string to a number value
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// tags:
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// protected extension
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var v = this._parser(value, lang.mixin({}, constraints, (this.editOptions && this.focused) ? this.editOptions : {}));
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if(this.editOptions && this.focused && isNaN(v)){
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v = this._parser(value, constraints); // parse w/o editOptions: not technically needed but is nice for the user
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}
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return v;
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},
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_getDisplayedValueAttr: function(){
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var v = this.inherited(arguments);
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return isNaN(v) ? this.textbox.value : v;
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},
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filter: function(/*Number*/ value){
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// summary:
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// This is called with both the display value (string), and the actual value (a number).
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// When called with the actual value it does corrections so that '' etc. are represented as NaN.
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// Otherwise it dispatches to the superclass's filter() method.
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//
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// See `dijit/form/TextBox.filter()` for more details.
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return (value == null /* or undefined */ || value === '') ? NaN : this.inherited(arguments); // set('value', null||''||undefined) should fire onChange(NaN)
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},
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serialize: function(/*Number*/ value, /*Object?*/ options){
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// summary:
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// Convert value (a Number) into a canonical string (ie, how the number literal is written in javascript/java/C/etc.)
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// tags:
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// protected
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return (typeof value != "number" || isNaN(value)) ? '' : this.inherited(arguments);
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},
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_setBlurValue: function(){
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var val = lang.hitch(lang.mixin({}, this, { focused: true }), "get")('value'); // parse with editOptions
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this._setValueAttr(val, true);
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},
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_setValueAttr: function(/*Number*/ value, /*Boolean?*/ priorityChange, /*String?*/ formattedValue){
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// summary:
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// Hook so set('value', ...) works.
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if(value !== undefined && formattedValue === undefined){
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formattedValue = String(value);
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if(typeof value == "number"){
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if(isNaN(value)){ formattedValue = '' }
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// check for exponential notation that number.format chokes on
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else if(("rangeCheck" in this && this.rangeCheck(value, this.constraints)) || this.constraints.exponent === false || !/\de[-+]?\d/i.test(formattedValue)){
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formattedValue = undefined; // lets format compute a real string value
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}
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}else if(!value){ // 0 processed in if branch above, ''|null|undefined flows through here
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formattedValue = '';
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value = NaN;
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}else{ // non-numeric values
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value = undefined;
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}
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}
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this.inherited(arguments, [value, priorityChange, formattedValue]);
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},
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_getValueAttr: function(){
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// summary:
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// Hook so get('value') works.
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// Returns Number, NaN for '', or undefined for unparseable text
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var v = this.inherited(arguments); // returns Number for all values accepted by parse() or NaN for all other displayed values
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// If the displayed value of the textbox is gibberish (ex: "hello world"), this.inherited() above
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// returns NaN; this if() branch converts the return value to undefined.
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// Returning undefined prevents user text from being overwritten when doing _setValueAttr(_getValueAttr()).
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// A blank displayed value is still returned as NaN.
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if(isNaN(v) && this.textbox.value !== ''){
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if(this.constraints.exponent !== false && /\de[-+]?\d/i.test(this.textbox.value) && (new RegExp("^"+number._realNumberRegexp(lang.mixin({}, this.constraints))+"$").test(this.textbox.value))){ // check for exponential notation that parse() rejected (erroneously?)
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var n = Number(this.textbox.value);
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return isNaN(n) ? undefined : n; // return exponential Number or undefined for random text (may not be possible to do with the above RegExp check)
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}else{
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return undefined; // gibberish
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}
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}else{
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return v; // Number or NaN for ''
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}
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},
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isValid: function(/*Boolean*/ isFocused){
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// Overrides dijit/form/RangeBoundTextBox.isValid() to check that the editing-mode value is valid since
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// it may not be formatted according to the regExp validation rules
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if(!this.focused || this._isEmpty(this.textbox.value)){
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return this.inherited(arguments);
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}else{
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var v = this.get('value');
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if(!isNaN(v) && this.rangeCheck(v, this.constraints)){
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if(this.constraints.exponent !== false && /\de[-+]?\d/i.test(this.textbox.value)){ // exponential, parse doesn't like it
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return true; // valid exponential number in range
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}else{
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return this.inherited(arguments);
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}
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}else{
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return false;
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}
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}
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}
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});
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var NumberTextBox = declare("dijit.form.NumberTextBox", [RangeBoundTextBox, NumberTextBoxMixin], {
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// summary:
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// A TextBox for entering numbers, with formatting and range checking
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// description:
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// NumberTextBox is a textbox for entering and displaying numbers, supporting
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// the following main features:
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//
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// 1. Enforce minimum/maximum allowed values (as well as enforcing that the user types
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// a number rather than a random string)
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// 2. NLS support (altering roles of comma and dot as "thousands-separator" and "decimal-point"
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// depending on locale).
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// 3. Separate modes for editing the value and displaying it, specifically that
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// the thousands separator character (typically comma) disappears when editing
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// but reappears after the field is blurred.
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// 4. Formatting and constraints regarding the number of places (digits after the decimal point)
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// allowed on input, and number of places displayed when blurred (see `constraints` parameter).
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baseClass: "dijitTextBox dijitNumberTextBox"
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});
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NumberTextBox.Mixin = NumberTextBoxMixin; // for monkey patching
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/*=====
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NumberTextBox.__Constraints = declare([RangeBoundTextBox.__Constraints, number.__FormatOptions, number.__ParseOptions], {
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// summary:
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// Specifies both the rules on valid/invalid values (minimum, maximum,
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// number of required decimal places), and also formatting options for
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// displaying the value when the field is not focused.
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// example:
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// Minimum/maximum:
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// To specify a field between 0 and 120:
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// | {min:0,max:120}
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// To specify a field that must be an integer:
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// | {fractional:false}
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// To specify a field where 0 to 3 decimal places are allowed on input:
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// | {places:'0,3'}
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});
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=====*/
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return NumberTextBox;
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});
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