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count a treeview root items

Posted on 2004-09-05
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Last Modified: 2011-09-20
hey all,
anyone have a function that can count the root items in a treeview?
not the total item count, I dont want to count the children....
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Question by:LMuadDIb
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6 Comments
 
LVL 7

Expert Comment

by:DavidBirch2dotCom
ID: 11985043
You might be interested in a treeview which is a huge amount better than the delphi default one Virtual treeview from www.delphi-gems.com - it has a rootnodecount property and has many more options... its well worthwhile if you are going to be doing anything serious with a treeview

David

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LVL 7

Accepted Solution

by:
DavidBirch2dotCom earned 100 total points
ID: 11985084
try this code

function TotalRootNodes(ATreeView: TTreeview): Integer;
var
 I,ANodes : Integer;
begin
  ANodes := 0;
  for I := 0 to ATreeView.Items.Count-1 do
     if ATreeView.Items[I].Parent = nil then
       inc(ANodes);
  Result := ANodes;
end;

A sample call would be

numItems:= TotalRootNodes(TreeView1);



its from this thread
http://www.experts-exchange.com/Programming/Programming_Languages/Delphi/Q_20693535.html

you might find something else useful from it

David
0
 
LVL 27

Expert Comment

by:kretzschmar
ID: 11987373
another possibility (just from head, not tested)

function countChilds(ATree : TTreeView;ANode : TTreeNode) : Integer;
var
  CNode : TTreeNode;
begin
  result := 0;
  if ANode = Nil then
    CNode := ATree.Items.GetFirstNode
  else
    cNode := ANode.GetFirstChild;
  if assigned(CNode) then
  begin
    while assigned(CNode) do
    begin
      result := result +1;
      cNode := cNode.GetNextSibling;
    end;
  end;
end;


meikl ;-)
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LVL 7

Expert Comment

by:DavidBirch2dotCom
ID: 11987817
Thanks for the points :)

I beat the mighty kretzschmar  ;-p) he he ;)

David
0
 
LVL 27

Expert Comment

by:kretzschmar
ID: 11988360
:-))
i posted my suggestion already after you got the grade, david,
so you was never in danger :-))

btw. i'm not mighty, i'm just a simple coder

meikl ;-)
0
 
LVL 7

Expert Comment

by:DavidBirch2dotCom
ID: 11988379
lol ;P
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