[Lazarus] Maybe a bug: click on TImage behind another control with SetShape

[Fabio Luis Girardi]

I found this bug on bug tracker. I followed your idea and send a patch that
solves this. I'll try another approach tomorrow.

Thank you very much!
Em 21/11/2014 20:48, "Frederic Da Vitoria" <davitofrg at gmail.com> escreveu:

> 2014-11-21 16:01 GMT+01:00 Frederic Da Vitoria <davitofrg at gmail.com>:
>
>>
>> 2014-11-20 19:21 GMT+01:00 Fabio Luis Girardi <fluisgirardi at gmail.com>:
>>
>>> I don't know if this is a bug or not. I created a control from a
>>> TCustomControl that draws a polyline with a transparent background. The
>>> transparent effect has been using SetShape procedure using a bitmap of 1
>>> bit color depth.
>>>
>>> The "bug" (I don't know if this is a bug) is that a TImage behind of a
>>> instance of my polyline control don't receive the click messages, but a
>>> TButton instance receives.
>>>
>>> So, I don't know if this is a bug or I have to do something in my
>>> control to send these messages to TImage behind.
>>>
>>
>> I had once a similar issue with a tPanel behind another control, in
>> Delphi. IIRC, I indeed had to forward the messages in some way to the
>> tPanel. I can check in my archives, if you want, but I won't be able to do
>> it before tomorrow.
>>
>
> I just checked. Sorry, my memory was wrong, I did use TButtons. But it
> makes sense that the uppermost control would prevent any deeper control
> from receiving clicks, even if the uppermost control is visually
> transparent.
>
> --
> Frederic Da Vitoria
> (davitof)
>
> Membre de l'April - « promouvoir et défendre le logiciel libre » -
> http://www.april.org
>
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