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Simulate an OnCheck event for TListView checkboxes (Views: 100)


Problem/Question/Abstract:

I am working on a program that uses a TListView with the checkboxes property set to true. There are several things I would like to be triggered off of the boxes being checked or unchecked. Is there any OnCheck event or something similar that I can use to start a process off of the check of one of these boxes?

Answer:

It seems, there isn't such event. But you could use this workaround:

procedure TForm1.ListView1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
var
  li: TListItem;
  ht: THitTests;
begin
  if ListView1.Items.Count <= 0 then
    exit;
  li := ListView1.GetItemAt(x, y);
  if Li <> nil then
  begin
    if li.Selected = false then
      li.Selected := true;
  end
  else
    exit;
  ht := LVSoLine.GetHitTestInfoAt(x, y);
  if ht = [htOnStateIcon] then
  begin
    { Write your code here for checkbox OnCheck event. Remember this will
    fire after the checkbox state is changed }
  end;
end;

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