title: Qt - Print widgets in specific layout
body: <p>In my project I have some own widgets.
  When I click on a toolbar-button to print, I want to print the widgets in a 
  specific layout  (landscape-orientation).</p>
  
  <p>I tried it with a new QWidget with a layout, and in this layout add my widgets.
  But when I do this, my widget disappear from my mainwindow.</p>
  
  <p>How can I print my widget without disappearing and my own layout?</p>