Adrian on Painters and Qt4

[Boudewijn Rempt]

For archival purposes:

=================

The way the paint system currently works is that you have either a 
KisQPaintDeviceCanvas (based on a QWidget) or a KisOpenGLCanvas (based 
on a QGLWidget) and you paint on these using a KisCanvasPainter. 
KisCanvasPainter has mostly the same API as QPainter, so you can work 
with it much as you would a QPainter on a normal widget. 
KisQPaintDeviceCanvasPainter implements KisCanvasPainter using a 
QPainter internally. In Qt 3, since you can't paint with a QPainter on a 
QGLWidget, KisOpenGLCanvasPainter implements the KisCanvasPainter 
functions using the direct OpenGL interface. However, since in Qt 4 
QPainter can paint on a QGLWidget, KisCanvasPainter should be able to 
simply inherit QPainter and there should be no need for 
KisOpenGLCanvasPainter or KisQPaintDeviceCanvasPainter. That's how I saw 
it going.

=================
-- 
Boudewijn Rempt 
http://www.valdyas.org/fading/index.cgi
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