Waiting on a user's response (from the gui)

Question

This should be a really simple problem, but I can't work it out.
I have two classes, my Engine and my Gui. The Engine tells the Gui what to display, the gui displays it and has methods to fire events when a user presses a button. I want to do something like the following
public class Engine {
  Gui gui;
  String[] pictures;
  // ... a bunch of stuff
  public void showPictures {
    for (int i=0; i<pictures.length; i++)
      gui.showPicture(pictures);
// wait on the user's response
Here's the question: preferably without using threading (though I could if I had to), how can I wait on a user's response from within a loop?
I considered having a boolean flag "hasResponded" in the gui, and then having a do-while loop just spinning until it saw that gui.hasResponded was equal to true, but it seems that this would add a lot of unnecessary processing load.
Any thoughts?
Thanks!

Answer 1

don1983p wrote:
I have the same question "So question is still just the simple one above: can I (easily) wait on some event, like the gui recording an action or anything else, from within a loop?"...If you have a question to ask, do so in a new thread. Don't resurrect a long-dead thread. Sure you can refer to it and even link to it, but let it rest in peace.
Any new ideas?Why would you expect the answer to change? You don't do this via a loop as GUIs don't work like this. Have you gone through the Swing tutorials? If not, please go through them as they'll show you how to do this correctly.
I wrote a WHILE loop, the condition of the loop being the values (getActionCommand) of some buttons being pressed. How can I wait for another button being pressed so I can get out of the loop?You don't. If you need to time a response, then use a Swing Timer. But most importantly, read the Swing tutorials.