title: qt : How can I minimize qsplitter's child?
body: <p><img src="https://i.stack.imgur.com/F20qN.png" alt="QSplitter"></p>
  
  <p>I made a QSplitter layout. And under QSplitter, there is QWidget and it's gridLayout children. At this case, I can't minimize QSplitter to 0 size. As I see above, it has restriction for height.  What cause this problem?  I tested some cases, and I found that when I use QGridLayout for QWidget's children. But I can't set minimum height to 0.</p>