如果 dijit. form 内部的值被递增或衰减, 有没有办法赶上事件? NumberSpinner 部件被递增或衰减?
我打算做的是,每当数值在数字Spinner元件中值低于 0 设定的文本为“ 永远” 时, 当用户从“ 永远” 增加时, 值应该再次设定为 0 。
dojo.declare("MySpinner", [Spinner], {
zeroValue: Never ,
adjust: function(/*Object*/ val, /*Number*/ delta){
arguments[0] = val && val > 0 ? val : 0;
return this.inherited(arguments);
},
_getValueAttr: function() {
var v = this.inherited(arguments);
return (!v || v <= 0) ? 0 : v;
},
format: function(/*Number*/ value, /*dojo.number.__FormatOptions*/ constraints){
var v = this.inherited(arguments);
if (v <= 0 || !v)
return this.zeroValue;
return v;
},
isValid: function(/*Boolean*/ isFocused){
var v = this.get( value );
if (!v) {
return true;
}
return this.inherited(arguments);
}
});
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