OpenEuphoria

RE: Win32Lib: Common Controls revisited

• Posted by CoJaBo <cojabo at suscom.net> Aug 24, 2004
• 429 views

Matt Lewis wrote:
> 
> Derek Parnell wrote:
> > Brian Broker wrote:
> > > 
> > > If it doesn't break anything else, can we get this fix?  I'd really like 
> > > to have my programs look right with version 6 common controls.
> > 
> > The problem is triggered by the use of XP manifests. The way the Win32lib
> > works is that it sets the background color to the values built-in to the
> > library, whenever Windows asks for the user-defined background color. That
> > is to say, Win32lib gives all controls a user-defined color. By default
> > this is the colors set by the user in the current Display Appearance Scheme.
> > 
> > But this only works when there is no manifest in place, or the manifest
> > is using the 'classic' scheme. If an alterate manifest is active, Win32lib's
> > operation is always replacing whatever the manifest does with the built-in
> > colors (though not in ways you'd expect). 
> > 
> > To 'fix' this, I have to change the internal usage of a number of color
> > attributes so that the library only sets the background color for those
> > controls that have explicitly been asked by the user app to use a specific
> > color. This might also affect text colors too. So more research will 
> > need to be done.
> > 
> > The upshot is that it will take me a few days to get it right!
> 
> I guess this is where you've changed the classBGColor values from 
> COLOR_WINDOW to w32NoColor?  This causes a problem under Win2KPro with
> treeviews.  The tree lines now are dark grey, while the rest of the control
> is white.
This happens on XP PRO too.

>  
> Perhaps the old behavior should be maintained, and a new routine like 
> useThemes() could be implemented to change the appropriate backgrounds.
> I suppose you could autodetect this for XP.
> 
> Matt Lewis
>