Method onMouseUp

Engine/source/gui/controls/guiTreeViewCtrl.cpp:3006–3476

on mouse up look at the current item and check to see if it is valid to move the selected item(s) to it.

// on mouse up look at the current item and check to see if it is valid
// to move the selected item(s) to it.
void GuiTreeViewCtrl::onMouseUp(const GuiEvent &event)
{
   if( !mActive || !mAwake || !mVisible )
      return;

   if( isMethod("onMouseUp") )
   {
      BitSet32 hitFlags = 0;
      Item* item;
      
      S32 hitItemId = -1;
      if( _hitTest( event.mousePoint, item, hitFlags ) )
         hitItemId = item->mId;
         
      onMouseUp_callback( hitItemId, event.mouseClickCount );
   }

   mouseUnlock();

   if ( mSelectedItems.empty())
   {
      mDragMidPoint = NomDragMidPoint;
      return;
   }

   BitSet32 hitFlags = 0;
   Item *item;
   bool hitCheck = _hitTest( event.mousePoint, item, hitFlags );
   mRenamingItem = NULL;

   if( hitCheck )
   {
      if ( event.mouseClickCount == 1 && !mMouseDragged && mPossibleRenameItem != NULL )
      {
         if ( item == mPossibleRenameItem )
            showItemRenameCtrl( item );
      }
      else // If mouseUp occurs on the same item as mouse down
      {
         bool wasSelected = isSelected( item );
         bool multiSelect = getSelectedItemsCount() > 1;
         if( wasSelected && multiSelect && item == mTempItem )
         {
            clearSelection();
            addSelection( item->mId );
         }
      }
   }

   mPossibleRenameItem = NULL;
   
   if (!mMouseDragged) 
      return;

   Item* newItem = NULL;
   Item* newItem2 = NULL;

   if (mFlags.test(IsEditable))