Thanks, Kostas, especially part about Qt styling.
I answered my solution yesterday, but it didn't appear in ML, it went to zejlko
only - I noticed later. So here it is:
I don't have QtNativeEventFilter in qtdefines.inc at all.
However, I found simple workaround. I create main form with Visible:=False; and
when all other forms are created I do FrmMain.Show; (in *.lpr). The order of
events is as expected.
Thanks.
______________________________________________________________
Od: "Kostas Michalopoulos via lazarus" <[email protected]>
Komu: "Lazarus mailing list" <[email protected]>
Datum: 26.11.2018 11:32
Předmět: Re: [Lazarus] Order of OnCreate and OnActivate in Qt4
I wouldn't rely on event order as anything between the creation to
Application.Run could call Application.ProcessMessages - including some
components/controls you may be using. As a rule of thumb you should assume that
after calling a control (or form) that it can start receiving events.In Qt4
styling is done through native code (QStyle subclasses) and it can alter
widgets (QStyle::polish) so it isn't unthinkable that a theme could do
something that generates events.
On Sun, Nov 25, 2018 at 6:47 PM zeljko via lazarus <[email protected]
<[email protected]>> wrote:On 11/25/2018 04:43 PM, Vojtěch Čihák via
lazarus wrote:
> CRASH, because code in OnActivate assumes that FrmContext already exists.
>
> So, Qt4+Plastique has different order of events than Qt4+QtCurve.
>
> Unfortunately, I cannot reproduce with simple demo.
>
> What I'm doing wrong? Do I rely on something that is not guaranteed?
Try to disable usage of QtNativeEventFilter in qtdefines.inc if it's
enabled.
zeljko
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