qwtplot3d-interest

Re: Label background colo

[Keith, T. <ke...@um...>]

Actually, it looks like simply NOT calling pm_.fill() [which is the same =
as pm_.fill(Qt:;white)] at all should and does work for both Qt3 and =
Qt4.  Why is pm_.fill() there?  The non-text pixels are defined by the =
mask to be transparent and the text pixels are defined by the mask to be =
opaque and are painted explicitly on the pixmap ... but I agree that the =
behavior of QPixmap::fill() wrt to the mask has changed between Qt3 and =
Qt4 ...

Re: Label background colo

[Micha B. <kri...@us...>]

Friday, July 22, 2005, 20:37:52, Keith, Todd wrote:

> Actually, it looks like simply NOT calling pm_.fill() [which is the
> same as pm_.fill(Qt:;white)] at all should and does work for both Qt3
> and Qt4.

I think to remember (still not sure about this anymore), that I got
drawing errors seemingly caused by uninitialized background (despite the
masks existence) for some graphic-card/Qt-version combination at the
time, when I wrote the code (Qt3.0.?). This behavior was fixable by
introducing the artificial fill.
I think, the pixmap should respect the mask also in the case of a filling
operation. IMO, the whole mask/alpha-channel topic has not yet a completely
unmisleading solution in Qt4.
For general clarification, I filed a (pending) bug report to Trolltech.

Micha  
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