Dojo validation of a textarea

Question

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.

Answer 1

Based on your question, I guess you are using dojo 1.6

This is my ValidationTextarea. It uses SimpleTextArea to support 'row' and 'cols' and ValidationTextBox for validation stuff.

The idea is similar to another answer just that in this case I don't define a templateString for the widget.

dojo.provide('mynamespace.ValidationTextarea');
dojo.require("dijit.form.ValidationTextBox");
dojo.require("dijit.form.SimpleTextarea");

//ValidationTextarea: Validation class that hide the displayMessage and 
//implement the validate method used by forms
dojo.declare("mynamespace.ValidationTextarea",[dijit.form.ValidationTextBox,dijit.form.SimpleTextarea], {

//int
// The maximum number of characters
maxLength: 255,

validate: function() {
if (arguments.length==0)
        return this.validate(false);

    return this.inherited(arguments);
},            

onFocus: function() {
    if (!this.isValid()) {
        this.displayMessage(this.getErrorMessage());
    }
},

onBlur: function() {
    this.validate(false);
},

filter: function(/*String*/ value){
    // Override TextBox.filter to deal with newlines... specifically (IIRC) this is for IE which writes newlines
    // as \r\n instead of just \n
    if(value){
        value = value.replace(/\r/g,"");
    }
    return this.inherited(arguments);
},

displayMessage: function(/*String*/ message) { 

}

});