[Lazarus] Subroutine ?

Hans-Peter Diettrich DrDiettrich1 at aol.com
Wed Jul 31 15:02:13 CEST 2013

Chavoux Luyt schrieb:
> On 31 July 2013 11:00, <lazarus-request at lists.lazarus.freepascal.org 
> <mailto:lazarus-request at lists.lazarus.freepascal.org>> wrote:
>     TComponent does not have Enabled. So the above code does not work.
>     TControl has Enabled.

Thanks, I missed that.

>     Disabling a control (e.g. no focus, some widgetsets draw them
>     gray) automatically disables child controls. So the easiest way
>     to disable all controls on a form is to set Form1.Enabled:=false.
>     Mattias
> Just a related question on this:
> What happens afterwards when I say Form1.Enabled:=true; ?
> If some controls were enabled beforehand and some were disabled, will 
> this be remembered or will I need to enable them one-by-one or will all 
> controls be enabled by default?

Enabling/disabling a Parent does not change the Enabled *values* of its 
child controls. Child controls of a disabled Parent are disabled 
implicitly, by e.g. message processing logic.


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