Am Freitag, 14. August 2009 schrieb Alexei Puzikov: > >> Actually, you do, as soon as you'll pass over some amount of controls. > >> > >> I have the editor here that reimplements the screenshot (it's Maya, > >> btw) and in worst situations contains approx. 4500 controls. And I'm > >> still unable to remove > >> flickering on switch - basically, the layout refresh. > >> > >> If anybody can prototype something that works with big amount of > >> controls - his help would be enormous. Really. > > > > Hmm, Alexei, please don't feel offended, but presenting 4500 controls > > to user basically sounds like a pathologic situation, where _concepts_ > > lost control ;-)... > > Well, it's probably Friday evening fluctuated my math a little bit - > so, in worst case, > it's 1500 controls. Which is actually pretty easy to achieve: 2 > spacers, label, editor and slider > for each parameter.
Ahh, okay, we're talking about 500 composite widgets then - which is where things start to get imaginable ;-) > > How is a user supposed to master that? Something similar to > > car navigation for the screen? (Take the second branch right, move > > mouse 200mm north, you reached your target, it's on the left side..) > > Well, that's what makes my job interesting :) Yes, it's a tough UI > stuff. Filtering, proper > grouping, good usable search, tagging, good documentation and most of > all - good default values :) > > > Even, if that widget, or control, if you like, is implemented in C++, > > as long as it is resizing itself, flickering cannot be suppressed, > > since it forces Qt to redraw the whole frame. I would start looking, > > how to get the whole thing into managable pieces. Next you may try to > > use a home grown layout manager, that is optimized for these cases > > (e.g. moves screen areas, but that's going to be tough, don't it?) > > I'm not sure. What actually bugs me is that layout engine is > repainting the widgets > that's haven't changed their geometry. Given how many layouts I have, > this flickers.... > > You think this might be overwritten?... What I had in mind was a layout manager, that's being aware of the situation: repaint only small screen areas (the widget, that is resizing itself), and copying the unchanged screen areas around, its doable but that's going to be a tough job, I assume. Pete _______________________________________________ PyQt mailing list PyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt