[Lazarus] Detect that component selected in OI.

[Ondrej Pokorny]

On 22.05.2016 15:45, Vojtěch Čihák wrote:
>
> With a small correction: it must be hooked only in design time.
>
> constructor TMyTabSheet.Create(TheOwner: TComponent);
>
> begin
>
>   ...
>
>   if csDesigning in ComponentState then
>
> GlobalDesignHook.AddHandlerSetSelection(@HookSelection);
>
> end;
>

You should separate the hook completely from your run-time code. Use the 
hook (and include IDEIntf) only in your design-time package and unit.

Ondrej
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