Reply To: Enabling a button after text is entered without pressing Enter

[Jeremy]

Hello,

Since I haven’t implemented a callback command for the TextInput element that would listen to keypresses, the best solution is to use a Key element (for which there is a callback command) to listen to keypresses. Now, it reacts to keypresses so fast that immediately checking the value of the TextInput element in the callback block won’t capture the newly pressed key, so you want to add a slight delay, e.g. 5ms before checking it.

Here’s how to do it based on the example you give:

newTrial('test',
    newTextInput('test_input')
         .print()
    ,
    // empty string means any key
    newKey('').callback( 
        newTimer(5).start().wait()
        ,
        getTextInput('test_input').test.text(/\w/)
          .success( getButton('Next').enable() )
          .failure( getButton('Next').disable() )
    )
    ,  
    newButton('Next', 'Next')
         .print()
         .disable()
         .wait()
)

Let me know if you have any questions

Jeremy