文本区域的Dojo验证 [英] Dojo validation of a textarea

问题描述

我试图第一次使用dojo，所以这可能很明显。

我有一个非常简单的形式，其中一个textarea需要要填写。

 < script src =http://ajax.googleapis.com/ajax/libs/dojo/1.10。 3 / dojo / dojo.js>< / script>< form id ='form1'action =method =dojoType =dijit.form.Form> < label for =dob> desc：< / label> < textarea class ='multilinecontrol'dojoType =dijit.form.Textareaselected ='true'required ='true'>< / textarea> < button type ='submit'id =nextname =nextdojoType =dijit.form.Button>下一个< / button>< / form>  

添加必需属性，所以我可以确保该表单在用户可以继续之前有效。

然而，当窗体显示时，textarea有一个红色的焦点环绕没有其他小部件的行为就像这样，它真的很讨厌。

任何想法如何摆脱它？

我可以通过将某些默认文本放在放在这里中，但是我必须进行额外的验证工作 - 我目前无法解决这个问题。

解决方案

而不是复制整个现有的类，只需使用mixin：

  define（[dojo / _base / declare，dojo / _base / lang，dijit / form / SimpleTextarea，dijit / form / ValidationTextBox 
 function（declare，lang，SimpleTextarea，ValidationTextBox）{
 
 return declare（'dijit.form .ValidationTextArea'，[SimpleTextarea，ValidationTextBox]，{
构造函数：function（params）{
 this.constraints = {}; 
 this.baseClass + ='dijitValidationTextArea'; 
}，
 templateString：< textarea $ {！nameAttrSetting} data-dojo-attach-point ='focusNode，containerNode，textbox'autocomplete ='off'>< / textarea>， 
验证器：function（value，constraints）{
 return（new RegExp（^（?:+ this._computeRegexp（constraints）+）+（this.required？ ）+$，[m]））。test（value）&& 
（！this.required ||！this._isEmpty（value））&& 
（this._isEmpty（value）|| this.parse（value，constraints）！== undefined）; // Boolean 
} 
}）
}）
  

不幸的是由于Textarea调整大小，因此我无法像使用验证输入那样获得与红色感叹号完全相同的行为，所以我完成了CSS技巧：

  .dijitValidationTextAreaError，.dijitValidationTextAreaError.dijitTextBoxHover {
 background-image：url（error.png）; 
 background-position：right; 
 background-repeat：no-repeat; 
} 
  

需要将error.png从claro主题复制到您的css位置。它显示在文本区域内，不在外面，但它是唯一的，相当小的区别。

I'm attempting to use dojo for the first time, so this may be be obvious.

I have a very simple form with one textarea in it that needs to be filled in.

<script src="http://ajax.googleapis.com/ajax/libs/dojo/1.10.3/dojo/dojo.js"></script>
<form id='form1' action="" method="" dojoType="dijit.form.Form">
  <label for="dob">desc:</label>
  <textarea class='multilinecontrol' dojoType="dijit.form.Textarea" selected='true' required='true'></textarea>
  <button type='submit' id="next" name="next" dojoType="dijit.form.Button">
    Next</button>
</form>

I've added the 'required' property, so i can ensure the form is valid before the user can proceed.

However when the form is show the textarea has a red focus ring around it, None of the other widgets behave like this and its really annoying.

Any idea how to get rid of it?

I could hack it by putting some kind of default text in like 'Put stuff here' but then I have to do extra validation work - which I presently can't work out how to do.

解决方案

Instead of copying the whole existing classes, it's enough to use mixin:

define(["dojo/_base/declare", "dojo/_base/lang", "dijit/form/SimpleTextarea", "dijit/form/ValidationTextBox"],
function(declare, lang, SimpleTextarea, ValidationTextBox) {

  return declare('dijit.form.ValidationTextArea', [SimpleTextarea, ValidationTextBox], {
    constructor: function(params){
      this.constraints = {};
      this.baseClass += ' dijitValidationTextArea';
    },    
    templateString: "<textarea ${!nameAttrSetting} data-dojo-attach-       point='focusNode,containerNode,textbox' autocomplete='off'></textarea>",
    validator: function(value, constraints) {
      return (new RegExp("^(?:" + this._computeRegexp(constraints) + ")"+(this.required?"":"?")+"$",["m"])).test(value) &&
        (!this.required || !this._isEmpty(value)) &&
        (this._isEmpty(value) || this.parse(value, constraints) !== undefined); // Boolean
    }
    })
  })

Unfortunatelly, I wasn't able to get exactly the same behaviour with red exclamation sign as with validating input - because of Textarea resizing factility, so I've done the CSS trick:

.dijitValidationTextAreaError, .dijitValidationTextAreaError.dijitTextBoxHover {
 background-image: url("error.png");
 background-position: right;
 background-repeat: no-repeat;
}

The error.png needs to be copied from claro theme to your css location. It is displayed inside the text area, not outside it, but it's the only, quite minor difference.

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