hi, I put at begin of paintGL that code but print strange things.......

Qt Code: 
  1. cout << " size.width() " << size().width() << " " << " size.height() " << size().height() << endl;
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Qt Code: 
  1. // at start of app
  2.  size.width() 101  size.height() 31
  3. paintGL
  4.  size.width() 101  size.height() 31
  5. paintGL
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Qt Code: 
  1. //after a rotation or traslation
  2.  size.width() 320  size.height() 340
  3. paintGL
  4.  size.width() 447  size.height() 363
  5. paintGL
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why this change of values printed?? thanks