void CCheckBoxTree::vSetCheckParent(HTREEITEM hItem)
{
if(hItem == nullptr)
{
return;
}
HTREEITEM hParentItem = GetParentItem(hItem);
HTREEITEM hChildItem;
BOOL bAllChecked = TRUE;
if( ItemHasChildren(hParentItem))
{
hChildItem = GetChildItem(hParentItem);
while(hChildItem)
{
if(!bIsItemChecked(hChildItem))
{
bAllChecked = FALSE;
break;
}
hChildItem = GetNextSiblingItem(hChildItem);
}
}
BOOL fCheck=0;
vSetCheck(hParentItem, bAllChecked);
vSetCheckParent(hParentItem);
vSetCheckChildren(hParentItem,!fCheck);
}
void CTreeViewEx::vSetCheckParent(HTREEITEM hItem)
{
if(hItem == NULL)
{
return;
}
CTreeCtrl &omTreeCtrl = GetTreeCtrl();
HTREEITEM hParentItem = omTreeCtrl.GetParentItem(hItem);
HTREEITEM hChildItem;
BOOL bAllChecked = TRUE;
if( omTreeCtrl.ItemHasChildren(hParentItem))
{
hChildItem = omTreeCtrl.GetChildItem(hParentItem);
while(hChildItem)
{
if(!bIsItemChecked(hChildItem))
{
bAllChecked = FALSE;
break;
}
hChildItem = omTreeCtrl.GetNextSiblingItem(hChildItem);
}
}
vSetCheck(hParentItem, bAllChecked);
vSetCheckParent(hParentItem);
return;
}
/******************************************************************************
Function Name : OnLButtonDown
Input(s) : UINT unFlag - Flags
CPoint point - Mouse Pointer point
Output : void
Functionality : ON_WM_LBUTTON Handler used to toggle the check point
Member of : CTreeViewEx
Friend of : -
Author(s) : Venkatanarayana Makam
Date Created : 30/03/2011
Modifications :
******************************************************************************/
void CTreeViewEx::OnLButtonDown(UINT unFlag, CPoint point)
{
UINT unHitTestFlags = 0;
HTREEITEM hItem = GetTreeCtrl().HitTest(point, &unHitTestFlags);
if((hItem != NULL) && (TVHT_ONITEMSTATEICON & unHitTestFlags))
{
BOOL bCheck = bIsItemChecked(hItem);
vSetCheck(hItem, !bCheck);
vSetCheckChildren(hItem, !bCheck);
vSetCheckParent(hItem);
return;
}
CTreeView::OnLButtonDown(unFlag, point);
}
