title: Check if spacebar is pressed inside a NSTextView
body: <p>I have a NSTextView where I need to check when a specific button is pressed. Using ModifierKeyFlags I can check if buttons like shift and control is pressed, but I need to check if SPACE is pressed. Therefore, I cannot use the ModifierFlags (cause it can check some buttons, excluding the spacebar)</p>
  
  <p>So I need a check, that notifies me everytime I press the spacebar in the textfield in my application. Any thoughts? I think it needs to be something like this:</p>
  
  <pre><code>if(spacebar is pressed) {
          Dlog(@"give me a notification");
  }
  </code></pre>