HTREEITEM CTreeViewEx::DragMoveItem(HTREEITEM hDraggingItem, HTREEITEM hDroppingItem, eTYPE_DROPPING eDropping)
{
CTreeCtrl& omTreeCtrl = GetTreeCtrl();
if(eDropping == NO_DROPPING)
{
return NULL;
}
if(bAnscestor(hDraggingItem, hDroppingItem) || !IsItemCanDropOn(hDraggingItem, hDroppingItem))
{
return NULL;
}
if(bSuccessor(hDraggingItem, hDroppingItem) && (eDropping == DROPPING_ABOVE))
{
return NULL;
}
if(hDraggingItem == hDroppingItem)
{
return NULL;
}
if(!hDroppingItem && eDropping == DROPPING_BELOW)
for(hDroppingItem = omTreeCtrl.GetRootItem(); omTreeCtrl.GetNextSiblingItem(hDroppingItem) != 0; hDroppingItem = omTreeCtrl.GetNextSiblingItem(hDroppingItem));
// Setup insertion parameters
HTREEITEM hInsertAfter = 0;
HTREEITEM hParent = 0;
switch(eDropping)
{
case DROPPING_BELOW:
hInsertAfter = hDroppingItem;
hParent = omTreeCtrl.GetParentItem(hDroppingItem);
break;
case DROPPING_ABOVE:
hInsertAfter = omTreeCtrl.GetPrevSiblingItem(hDroppingItem);
if(!hInsertAfter)
{
hInsertAfter = TVI_FIRST;
}
hParent = omTreeCtrl.GetParentItem(hDroppingItem);
break;
default:
ASSERT(false);
break;
}
m_hDraggingItemgedItem = CopyTotalBranch(hDraggingItem, hParent, hInsertAfter);
omTreeCtrl.DeleteItem(hDraggingItem);
return hInsertAfter;
}
/******************************************************************************
Function Name : CopyTotalBranch
Input(s) :
Output : HTREEITEM
Functionality :
Member of : CTreeViewEx
Friend of : -
Author(s) : Venkatanarayana Makam
Date Created : 30/03/2011
Modifications :
******************************************************************************/
HTREEITEM CTreeViewEx::CopyTotalBranch( HTREEITEM hBranchItem, HTREEITEM hNewParentItem, HTREEITEM hAfterItem /*= TVI_LAST*/ )
{
HTREEITEM hChildItem;
CTreeCtrl& omTreeCtrl = GetTreeCtrl();
HTREEITEM hNewItem = CopyTreeItem( hBranchItem, hNewParentItem, hAfterItem );
hChildItem = omTreeCtrl.GetChildItem(hBranchItem);
while( hChildItem != NULL)
{
CopyTotalBranch(hChildItem, hNewItem, TVI_LAST);
hChildItem = omTreeCtrl.GetNextSiblingItem( hChildItem );
}
return hNewItem;
}