current status

when pressing enter key in <textbox multiline="true" rows="5" onOK=""/>, currently, it doesn't fire onOK event.

use case

There are at least 2 kinds of use cases for a multi-line textbox. Users will expect different behavior when pressing an "enter".

• text editor
  users edit a text/doc, therefore, when pressing "enter" key, they expect a new line.

• message sender box
  
  Users type a message in a textbox like Skype, Facebook message, Hangout. Therefore, they expect to send the message when pressing "enter" key. Only pressing shfit+enter produces a new line.

Since both cases are reasonable usage, so Textbox should provide an attribute to determine whether to send onOK event. like *tabbable", it determines whether to insert a tab or move focus out of a Textbox (both are valid).

proposed spec

textbox atrribute: submitByEnter
default: true

• When it's true, a textbox sends onOK event when pressing the enter key no matter multiline is true or false
  • with multiline="true", shift+enter still produces an new line

    <textbox submitByEnter="true" multiline="true">
    

• When it's false, pressing the enter key doesn't send onOK event no matter multiline is true or false