Re: [ros-dev] [gvg] 19895: Make sure that WM_NCPAINT messages are generated by calling BeginPaint

[Filip Navara]

Ge van Geldorp wrote:

> >  From: Filip
> > Navara
> >
> > The previous code was perfectly valid. Why did you change it? 
> > If GetUpdateRect returns FALSE then there's no need to call 
> > BeginPaint...
> >     
> >  
> Possibly I fixed it wrong. Try minimizing the window with the old code. This
> will set the WINDOWOBJECT_NEED_NCPAINT flag. As a result, an endless stream
> of WM_PAINT messages is generated, 'cause that flag is never reset. Calling
> BeginPaint resets the flag.
>   
>  
I overlooked that the code used GetUpdateRect with the last parameter 
set to FALSE, it should be set to TRUE. In that case GetUpdateRect is 
responsible for sending the WM_NCPAINT message and cleaning the update 
region.

- Filip