access main window from function

[eric]

Actually the example I gave was just a theoretical example.
What I have in my program is this:

//step1: calculate x and y (both numbers are OK for window size)
 
  //step2:
   resize(x,y);
   QApplication::processEvents();
 
  //step3: do graphics and return to step 1

//step1: calculate x and y (both numbers are OK for window size)

  //step2:
   resize(x,y);
   QApplication::processEvents();

  //step3: do graphics and return to step 1

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steps 1 and 2 are in the same function, step 3 is in a different function.

Why does this code resize the screen only the first time it passes through it? Only the first set of x and y are executed and all the following ones are ignored.
I am doing all this to make the window wrap around a photo as I open it on the screen. Different photos are different size and I want the window size readjusted for each photo.

I use a lot of addStretch() to make my layout. Could this be causing the problem? Maybe once a large window is made the resize function cannot shrink the window because it cannot fit the expanded stretch in the new window? I don't know if this is making sense.