Board index » cppbuilder » Problem with TTreeView and AddChild (or my code)???

2007-06-06 01:27:15 AM
cppbuilder45
Hello all (i hope this is the right newsgroup...),
i've been scratching my head with the function below for days and would
appreciate some help. The objective of this function is to recursively look
through a directory and subdirectory for all folders that contain a
umfolder.ini file and add them to a Treeview control. That all works fine
but the function fails when the line to call Addchild is called.
The NewNode ptr is not initialised correctly and hence the remaining
assignments to NewNode fails. I know the searching etc works fine as i have
removed the TTreeview code and tested.
At the time the AddChild is called, the tNode, tv and asFolder variables are
all valid
void __fastcall TCC3UserFolders::GetUserContainerFolders(AnsiString
StartPath,TTreeView *tv,TTreeNode *tNode)
{
TSearchRec sr;
AnsiString asPath,asUMini,asFolder;
//TTreeNode *NewNode;
asPath = StartPath+"\\*.*";
if(FindFirst(asPath, 0x0000FFFF, sr) == 0)
{
do
{
if((sr.Attr & faDirectory)>0)
{
// sr.Name is a subdirectory
if((sr.Name!=".")&&(sr.Name!=".."))
{
asUMini=StartPath+"\\"+sr.Name+"\\UMFolder.ini";
if(FileExists(asUMini)) //Stops search going too deep
{
asFolder=sr.Name;
TTreeNode *NewNode =tv->Items->AddChild(tNode,asFolder); //@@LINE
DOES NOT WORK CORRECTLY
NewNode->ImageIndex =2;
NewNode->SelectedIndex =3;
NewNode->Data = new
AnsiString(StartPath+"\\"+sr.Name);
GetUserContainerFolders(StartPath+"\\"+sr.Name,tv,NewNode);
}
}
}
}
while(FindNext(sr) == 0);
FindClose(sr);
}
}
Can any bright spark spot anything obvious that i just cannot see??
All help appreciated
Thanks
Andy
 

"A Johnson" < XXXX@XXXXX.COM >wrote in message
'tNode' is valid when you call the function for the first time?
- Dennis
 

Hi, thanks for the reply. It is indeed valid - i've double checked and
double checked again - im using BDS2006 on a win2003 system. I have a
suspicion the code works fine on a win2000 system but i cannot check right
now (tomorrow). Should the OS version make a difference? Also, im calling
this function from within the Form's constructor - not sure if that makes
any diff. Immediately prior to the first call to this function, node's are
added with no problem. I just cannot figure it out...
"Dennis Jones" < XXXX@XXXXX.COM >wrote in message

{smallsort}

"A Johnson" < XXXX@XXXXX.COM >wrote in message
GetUserContainerFolders().
original node is invalid to begin with.
place.
Try the following:
void __fastcall TCC3UserFolders::GetUserContainerFolders(const
AnsiString &StartPath, TTreeView *tv, TTreeNode *tNode)
{
TSearchRec sr;
AnsiString asPath, asFolder;
asPath = IncludeTrailingBackslash(StartPath);
if( FindFirst(asPath + "*.*", faAnyFile, sr) == 0 )
{
do
{
if( sr.Attr & faDirectory )
{
// sr.Name is a subdirectory
if( (sr.Name != ".") && (sr.Name != "..") )
{
asFolder = asPath + sr.Name;
if( FileExists(asFolder + "\\UMFolder.ini") )
//Stops search going too deep
{
TTreeNode *NewNode;
if( tNode )
NewNode = tv->Items->AddChild(tNode,
sr.Name);
else
NewNode = tv->Items->Add(NULL,
sr.Name);
NewNode->ImageIndex = 2;
NewNode->SelectedIndex = 3;
NewNode->Data = new AnsiString(asFolder);
GetUserContainerFolders(asFolder, tv,
NewNode);
}
}
}
}
while( FindNext(sr) == 0 );
FindClose(sr);
}
}
Gambit