title: how to set Value for extjs textfield?
body: <p>i have a lot of textfields for userdata. and i wish to set it from DB. </p>
  
  <pre><code>items: [{
                          xtype: "form",
                          bodyPadding: 5,
                          border: false,
                          defaults: {
                              xtype: "textfield",
                              inputType: "text",
                              anchor: "100%"
                          },
                          items: [{
                              fieldLabel: 'Username:',
                              readOnly: true,
                              value: 'Admin',
                              name: "username"
                          }, {
  </code></pre>
  
  <p>i have external class named <code>openDB.js</code> with method <code>getUserByUsername()</code> 
  here is small code how its will be used in other view and it works, but in my actuall view i cant set the Value of textfield. please help how to do that?</p>
  
  <pre><code> openDB.getUserByUsername(user.username).then(function(userDetails) {
              me.setTitle("Welcome " + userDetails.mail + "!");
          });
  </code></pre>
  
  <p>i want to do something like this with  <code>value: 'Admin'</code> and so on...</p>
  
  <p>i found some method on Sencha Forum, but can I use it??</p>
  
  <pre><code>setValue: function(value) {
          var me = this;
          me.setRawValue(me.valueToRaw(value));
          return me.mixins.field.setValue.call(me, value);
      },
  </code></pre>