[Lazarus] Form event

[Antonio Fortuny]

Le 20/02/2013 11:36, Hans-Peter Diettrich a écrit :
> Antonio Fortuny schrieb:
>>
>>
>> Le 19/02/2013 19:34, Hans-Peter Diettrich a écrit :
>>> Antonio Fortuny schrieb:
>>>> Hi folks.
>>>>
>>>> Do you know an event or any other trick I could use when a form
>>>> re-gains control, i.e. is focused again ?
>>>> Events OnShow, OnActivate fire only once after OnCreate.
>>>
>>> These were my candiates as well.
>>>
>>>> The form is brought to the foreground by the means of a
>>>> MyForm.BringToFront once a OtherForm.ShowModal returns. The reason is
>>>> because the WindowsCE forms stack control seems to be rubbish.
>>>
>>> Sorry, I don't know how WinCE behaves in this case.
>> Very simple: when yo exit a modal displayed form you are not always
>> sure to have on the screen the form which displayed the closed one.
>> That's why I guess that forms stack is not very well managed
>
> These are two problems. One is the Z order maintenance, and another one
> which messages are sent. I only know from working on one program (C++),
> that WinCE differs from traditional Windows behaviour.
I can aknowledge. This strange behaviour is what we see. This the reason 
why on ShowModal return a Self.BringToFront is performed and Z order 
stack problems are solved
>
>>  But when ShowModal
>>> returns, you can do whatever is needed - e.g. invoke FormActivate or
>>> whatever handler contains your specific code.
>> Yes, but the problem is that this main form shows two dozens of other
>> forms ! It's easy to gain control after ShowModal returns but the code
>> has to be repeated as many times as ther are forms to process.
>
> AFAIR the LCL maintains a forms list in Z order (Application.Forms?),
> which may be useful to establish the wanted Z order.
>
> DoDi
>
>
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