[lazarus] Need your thoughts on Caret

Marc Weustink marc at dommelstein.net
Mon Aug 11 16:00:37 EDT 2003

At 20:56 11-8-2003 +0200, Micha Nelissen wrote:
>The SynEdit creates a caret to display. This is implemented in the win32 
>interface, but the win32 interface needs it to be created on *every* 
>setfocus. That is, when you lose focus, you hide & destroy your caret, 
>then when you get focus, you need to create & show the caret. Help from 
>win32sdk on ShowCaret:
>ShowCaret shows the caret only if the specified window owns the caret, the 
>caret has a shape, and the caret has not been hidden two or more times in 
>a row. If one or more of these conditions is not met, ShowCaret does 
>nothing and returns FALSE.
>If you trace code flow you will see that ShowCaret indeed returns false 
>most of the time if not always.

What is the case, why is it false ?
You're not the owner ?
It has no shape ?
It't is pretty good hidden ?

>Since this involves more than simply adjusting the win32 interface, I ask 
>for your thoughts on this.

Why adjusting the interface ?


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