[lazarus] Patch: window subclassing, paint messages

[Micha Nelissen]

Mattias Gaertner wrote:
> On Fri, 4 Jul 2003 13:15:15 +0200
> "Micha Nelissen" <mdvpost at hotmail.com> wrote:
> 
>> Mattias Gaertner wrote:
>>> On Fri, 4 Jul 2003 11:36:47 +0200
>>> "Micha Nelissen" <mdvpost at hotmail.com> wrote:
>>> 
>>>> Hi,
>>>> 
>>>> Attached is a patch to implement proper window subclassing and
>>>> paint messages. This will enable _LARGE_ parts of the lcl code with
>>>> respect to the interface because we actually get messages like
>>>> listbox insertitem etc. Speedbuttons will now also be drawn
>>>> correctly, groupboxes are drawn correctly...etc.
>>>> 
>>>> In wincontrol.inc I have changed the defaulthandler to send a
>>>> message. This is still up for debate, and I don't know the effects
>>>> on the GTK. Comments are welcome.
>>> 
>>> I didn't found this behaviour in the VCL. So, I changed them back to
>>> calling the DefaultHandler and added a TWinControl.DefaultHandler,
>>> that calls the new interface procedure CallDefaultWndHandler. The
>>> win32 interface then sends the paint message.
>>> Please test it. We can also add an interface method of its own for
>>> the paint message, if you like.
>> 
> 
>> 2) more typing on the Message? 'const Message: TLMessage' maybe?
> 
> Messages have different size. It must be untyped.

But you cast it to a TLMessage anyway? To get the Msg field?

Regards,

Micha.