extjs: How to l set value for combobox when loading

Question

1. I am looking for a load listener, that when the combobox is up, load will be called and preform an ajax to the s

Answer 1

One of the things that I have wanted to do is have a default value from the store be selected when the combobox is rendered. Setting the combo box value to the first value from the store has worked pretty well.

Ext.create('Ext.form.field.ComboBox', {
...
value : this.myStore.first().get('aFieldName')