[Lazarus] TCombobox major failure :(

[Michael Van Canneyt]

On Wed, 9 Jul 2008, Mattias Gärtner wrote:

> Zitat von Michael Van Canneyt <michael at freepascal.org>:
> 
> > Hi,
> >
> > In GTK 1, the TCombobox somehow looses the 'OnChange' event after it was
> > fired
> > once, but only when the items list is sorted.
> >
> > Steps to reproduce:
> > - Drop TCombobox on a new form
> > - Set items (one two three four five)
> > - Set Sorted=True  - this is required !!
> > - Set Style=csDropDownlist (don't know if this is required)
> > - In OnChange event handler show a message or something like it.
> > - Run project.
> > - Select item. Message appears.
> > - Select another item. Message does not appear.
> >
> > The event handler is still <> Nil (I added code to check this),
> > but is simply never called any more when something is selected.
> >
> > And in GTK 2 the event handler is always called twice !!
> 
> The GTK2 sends an LMCHANGED for the change of the edit and an LMSELCHANGE for
> the change of the ItemIndex.
> The LCL sends the second OnChange if OnSelect is nil. I don't know why.
> Maybe the LCL should be extended to not send the change two times?

Yes, because this is not consistent with the other widgetsets, and not 
consistent with Delphi ?

> 
> 
> > Is this a known issue ? I'm using Lazarus revision 15540.
> > Should I add it to the bug tracker ?
> > Because this is IMHO a major regression...
> 
> I will take a look at gtk1.

Thanks. That would be great.

Michael.