Копировать и вставлять TreeNode

Материал из DRKB

Копировать и вставлять TreeNode[править | править код]

var
  SL : TStringList;

procedure TForm1.CutBtnClick(Sender: TObject);
var
  i, j, StartLevel: integer;
  TNSel: TTreeNode;
begin
  TNSel := TreeView1.Selected;
  if TNSel <> nil then
  begin
    StartLevel := TNSel.Level;
    i := TNSel.AbsoluteIndex;
    j := i; // note for later deletion
    if SL = nil then
      SL := TStringList.Create
    else
      SL.Clear;
    SL.AddObject(TNSel.Text, Pointer(0));
    Inc(i);
    with TreeView1 do
    begin
      while Items[i].Level > StartLevel do
      begin
        { stop before next sibling to top node }
        SL.AddObject(Items[i].Text, Pointer(Items[i].Level - StartLevel));
        Inc(i);
      end;
      Items[j].Delete;
    end;
  end;
end;

procedure TForm1.PasteBtnClick(Sender: TObject);
var
  i, Level : integer;
  TNSel, TN : TTreeNode;
begin
  with TreeView1 do
  begin
    TNSel := Selected;
    if TNSel <> nil then
    begin
      TN := Items.Insert(TNSel, SL.Strings[0]);
      Level := integer(SL.Objects[0]); // should be 0
      for i := 1 to SL.Count - 1 do
      begin
        if integer(SL.Objects[i]) < Level then
        begin
          { go up one level }
          TN := TN.Parent;
          Level := Integer(SL.Objects[i]);
        end;
        if Level = Integer(SL.Objects[i]) then
          { same level }
          TN := Items.Add(TN, SL.Strings[i])
        else
        begin
          { go down one level }
          TN := Items.AddChild(TN, SL.Strings[i]);
          Level := Integer(SL.Objects[i]);
        end;
      end;
    end;
  end;
end;


Source: http://delphiworld.narod.ru/
ID: 01115