[Lazarus] {Spam?} Re: Modal windows on Cocoa

[Michael Van Canneyt]

On Sun, 13 Nov 2016, zeljko wrote:

> On 13.11.2016 19:52, Michael Van Canneyt via Lazarus wrote:
>> 
>> Hi,
>> 
>> I am not sure whether this is a bug of the cocoa widgetset, or whether this
>> is a general limitation of the Mac.
>> 
>> Imagine a main form, which shows a modal form. The modal form shows a
>> message dialog (ShowMessage or MessageDlg, it makes no difference).
>> 
>> This works perfectly on Linux and Windows.
>> 
>> If you do this on a Mac, then the program hangs: there is no way to press
>> the OK button in the message dialog.
>> 
>> Is this a limitation of the Mac ? I have never seen a Mac program do
>> this kind of thing, so I could imagine
>> that this is a limitation, but admittedly my experience on the Mac is
>> not as big as on PC...
>
> I'm still using Qt-4.8.6 (QtCarbon 32bit) for production under mac and it 
> does not have single problem with such windows, also tested with Qt-5.6.2 
> (QtCocoa 64bit) and there it works correct too, so doesn't look like 
> limitation :)

I didn't know that Qt could be used for mac.

It made me realize that I assumed I was using Cocoa, so I checked, and it
turns out it is Carbon, not cocoa :/

When I tried to change it, the IDE sends me to 'Additions and overrides'
But when I press 'Set LCLWidgetType', nothing visible happens, and the 
IDE becomes unresponsive. (Presumably some dropdown list is hidden behind
the modal project options dialog...)

I need to switch to another application and back to the IDE, then it becomes
responsive again. Since the IDE is built using Carbon, it seems safe to
assume there is a bug in the Carbon widgetset.

Michael.