Painting on a temporary layer

[Bart Coppens]

I looked a bit at how I made a new layer in the text tool, and I was able to 
get the layer to be displayed. Unfortunately it looks really hacky and awful: 
I now use 
 
m_target = dynamic_cast<KisDoc*>(m_subject->document())->layerAdd( 
currentImage(), device->width(), device->height(), "temp", OPACITY_OPAQUE); 
 
instead of manually creating a new layer. Not only does it look ugly, it also 
has the side effect of this layer suddenly becoming visible in the layer 
selection box. And as you feared it's quite slow, so I fear I will have to use 
the undo information... 
 
Bart Coppens