[Lazarus] Bug 15390 and Showmodal

[patspiper]

On 18/04/12 16:22, Martin wrote:
> On 18/04/2012 11:53, Hans-Peter Diettrich wrote:
>> patspiper schrieb:
>>
>>>> No, FormClose() isn't called when modal form is hidden via Hide();
>>>>
>>> Correct
>>>>
>>>> , so form still exists and it can be called with ShowModal() or 
>>>> Show() again.
>>>>
>>> I beg to differ here as Showmodal should not exit unless the modal 
>>> form is closed.
>>
>> A modal form (dialog) can be used to accept multiple user entries 
>> (filename...). Then the form object must stay alife until the 
>> application has read all entries. That's why a modal form only hides 
>> itself on exit.
>>
>
> closed <> destroy
>
> Close() depends on close action, which include free and hide.
> Close() on a modal Form in LCL ignores close action and always hides 
> (by setting ModalResult = mrCancel.
>
> Hide() or Visible:=False does not set ModalResult
>
> In fact if in Delphi you hide a modalform, then ShowModal does not return.
Correct
> I don't know, if this is intended or accidental behaviour.
It is intended behaviour. Embarcadero docs clearly state:
"ShowModal does not return until the form closes"

Lazarus docs:
"Show this form as modal - ie control cannot be resumed by another form 
until the current form is closed"
> While of course you can use this, there is a real danger of such a 
> modal form become hidden, with no means of ever getting it back or 
> exiting it.
This is fine especially that the same situation arises when the main 
form is hidden -> no means of ever getting it back or exiting it. It is 
up to the programmer to decide if he opts to hide it.

Stephano