On Fri, 2006-03-17 at 12:25 +0100, Georg Baum wrote: > Abdelrazak Younes wrote:
... > > But on the subject of QPixmap vs QImage in QWorkArea, I would like to > > continue investigating this route a bit. Right now, correct me if I'm > > wrong, the lyx kernel ask for a repaint of the whole screen for each and > > every drawing operation as shown by the debug message in > > QScreen::expose(). So the whole image is sent through the network. I > > remember reading that this will eventually change in some future > > version, won't it? If yes, this would decrease the network traffic > > significantly. > > I remember having read that, too. I don't... but it appears straightforward to do. See patch. Works fine for me. - Martin
Index: screen.C =================================================================== --- screen.C (revision 13408) +++ screen.C (working copy) @@ -219,7 +219,8 @@ void LyXScreen::redraw(BufferView & bv, workarea().getPainter().start(); paintText(bv, vi); lyxerr[Debug::DEBUG] << "Redraw screen" << endl; - expose(0, 0, workarea().workWidth(), workarea().workHeight()); + //expose(0, 0, workarea().workWidth(), workarea().workHeight()); + expose(0, vi.y1, workarea().workWidth(), vi.y2 - vi.y1); workarea().getPainter().end(); theCoords.doneUpdating(); }
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