Speed, transparency, and drop issues with QGraphicsView

**jefferai** · 27th June 2007, 18:24

Not really...the code snippets in the first post are pretty much enough (just set the function that changes the transparency to a QTimeLine firing). I'm not interested in finding out if it appears fast on your really powerful machine, I'm interested in finding out why it's slow on normal machines.

**guilugi** · 27th June 2007, 18:33

Well, it's always better to have exactly the same code as yours, to see if all the issues are exactly the same.

This kind of issues can be provoked by hardware, drivers...etc
And it can be quite different from a machine to another.

**jefferai** · 27th June 2007, 18:37

You can find the latest version of the code here:

http://websvn.kde.org/trunk/extragea.../popupdropper/

You'd have to do a bit of tweaking around to actually have it run standalone...the code by itself should pretty much be entirely standalone but there's no main or qmake file.

Searching back in the history of popupdropperview.cpp you can see the various attempts at semi-transparent backgrounds of the QGV.

**guilugi** · 27th June 2007, 18:41

Ok, thanks, that will help.

**guilugi** · 29th June 2007, 15:17

Effectively, I have a lot of tweaking to make this sample work...you should have specified it was a part of amarok ;-)

I'll try to do this tonight.

**jefferai** · 29th June 2007, 17:04

You an Amarok fan? Or just finding that to tweak you have to do a lot of building? :-)

The code's undergone some changes the past few days, so if you're trying things out, make sure you keep up to date with SVN trunk.

Thanks a lot for looking at this.