title: Managing QMainwindow and its subwindows
body: <p>I have a program in Qt creator. In this program the main widget is an image viewer and 4 other widget are displayed in this main widget. 
  An overview of Software is available in this <a href="http://s5.picofile.com/file/8119389542/Project.png" rel="nofollow">link</a>
  How can i arrange this widgets in my image viewer program as shown in the picture?</p>