[fpc-pascal] TStringList.Put calls change even if value hasn't changed

Michael Van Canneyt michael at freepascal.org
Mon Feb 11 12:30:50 CET 2013

On Mon, 11 Feb 2013, Bart wrote:

> On 2/10/13, Michael Van Canneyt <michael at freepascal.org> wrote:
>> You expect wrong. No supposition is made whatsoever on the value.
>> Every write in the list triggers a change.
>> This is how delphi implements it, and that is how we implemented it.
> That's why I mentioned I might be horribly wrong.
> So Delphi compatibility.


> I think it's inconsitent with other components that have a OnChange.
> Generally this is only fired if something (text) "really" changed.

There are many exceptions to that rule.

> Current behaviour leads to many unneccesary calls to OnChange and
> OnChanging in a certain Lazarus LCL component (fixed it there).

I am aware of this.

But the impact of changing it is impossible to guess, so it is not 
subject to change.


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