[Qt-interest] Dragging TreeWidgetItems in a QTreewidgets.

[phil prentice]

Hi
  I am using QT 4.2.1.  I have created a tree structure of 
icons(TreeWidgetItems).  As far as my application is concerned the order of 
the icons from top to bottom is important.  I wish to give the user the 
capability of moving the icons around the tree.  However the user must not be 
allowed to move an icon outside of its current level in the tree.  For 
example an icon at the top level should not be allowed to become a child of 
another icon.  

One obvious way to do this is to create up and down pushbuttons which move the 
highlighted icon up and down the tree at the allowed level.  However I was 
trying to be adventurous and use drag and drop.  The default implementation 
allows icons to be dropped inside other icons in the tree.  I derived a class 
from QTreewidget and re-implement the method dragMoveEvent(), but was not 
sure how to proceed from there.

Is it possible to do this using QT4.2.1 or should I stick to the nice simple 
up/down push buttons?

Thanks for your help

Phil