[Qt-interest] how to paint monochrome QImagecolorised(black=>arbitrary color, white=>transparent)?

[Stephen Chu]

In article <hs5aem$el$1 at eple.troll.no>,
 "Ross Bencina" <rossb-lists at audiomulch.com> wrote:

> > If your image is a 1-bit bitmap, you can convert it to a QBitmap then
> > set the background mode to transparent, set pen to the color you want.
> > Then draw the pixmap:
> >
> >   QBitmap theBitmap = QBitmap::fromImage(theImage);
> >   painter->setBackgroundMode(Qt::TransparentMode);
> >   painter->setPen(theColor);
> >   painter->drawPixmap(where, theBitmap);
> 
> Thanks, actually my source image was in a resource so it was possible to 
> load the bitmap directly from the resource:
> 
> QBitmap theBitmap( ":/DynamicsMeterNumber0.png" );
> ...
> painter->setBackgroundMode(Qt::TransparentMode);
> painter->setPen(theColor);
> painter->drawPixmap(where, theBitmap);
> 
> Many thanks
> 
> Ross. 

Glad to help. How if I can only figure out how to use an 8-bit image as 
a mask to arbitrary drawing...

-- 
Stephen Chu