OCT
22
2005

Simply cool

I haven't been blogging for a while. Mainly because I simply haven't felt like it and I've been going through some things lately. But I promised that I'm going to show some movies of things I've been doing. There's really no good way of showing OpenGL effects, vns2swf just doesn't handle it. So those will come later.

Today we're going to talk a little bit about what we can do with ARGB visuals for Plasma. The problem was that we wanted to have custom shaped windows, whose shapes can be animating and anti-aliased. Something XShape can't handle. Therefore we made sure Qt works correctly with ARGB visuals. Now, the big question is "what are you talking about and what can I do with it?". So lets look at an example that I just recorded using vnc2swf (physos did the nice html wrapping of the files so if you post this blog somewhere have mercy on his server and try to mirror the files somewhere):
http://physos.net/zacks_videos/zacks_video_1.html (swf file at http://ktown.kde.org/~zrusin/cool1.swf )
As you can see we have a window shaped like gear, it holds normal Qt widgets (button, checkbox and labels in this case). Also note that after pressing the button we get a "notification" icon beyond our window. All of this is builtin in Qt. How do you get it? Well, you just fill your toplevel with a transparent brush and set its content propagation. Impressed?
Then lets do something cooler. Lets create a SVG file, lets create a widget and set its shape with the result of our SVG rendering (Qt 4.1 has native support for SVG. If I'm going to get more motivated I'm going to blog a little bit more about the funky things I did to QtSvg so I'm not going to go too deeply into SVG support).
http://physos.net/zacks_videos/zacks_video_2.html (swf file at http://ktown.kde.org/~zrusin/cool2.swf )
The coliber is a SVG file, on top of it we slap a QCheckBox and connect it's toggled signal to a label.
I've been talking a lot about future of graphics lately and one thing I always say is that all I'm doing is building a framework on top of which others can implement anything they want. We spent too much time hacking around framework to do cool stuff. Now our framework (X11 and Qt) support it all. Things like dashboard widgets would be now trivial to implement. In fact we can do it a lot better : connect SVG files with ECMA script and suddenly you get a lot more powerful framework. Isn't KDE 4 getting you all excited? ;)

Comments

Nothing else to say really.


By ismail at Sat, 10/22/2005 - 19:37

This all sounds very cool, but would it be possible to add non-flash versions of the movies? The only free swf player won't play them here :-(


By bart coppens at Sat, 10/22/2005 - 20:27

Just to answer a possible; "Q: Vut why don't you...?"
A: because macromedia never released one for 64bit machines. :(


By Thomas Zander at Sun, 10/23/2005 - 12:36

With a little hack and the magic of KDE, you can use 32 bit plugins in konqueror.
http://forums.gentoo.org/viewtopic-t-321907-highlight-nsplugin.html
and
http://forums.gentoo.org/viewtopic-t-216959.html

Should work with KDE 3.5, and on other distributions.

I know this is only a temp solution, but it does work (on kde 3.4 at least).


By Morten Sj√łgren at Wed, 12/21/2005 - 17:33

That would be awesome to see SVG + ECMA script. :) That will have some really amazing possibilities. How much svg does QT support? The whole of 1.1 and parts of 1.2? (1.2 isn't released so you can't say all of 1.2 ;) ) Do they support all the SMIL animations?

I have been waiting a long time to add svg animated emoticons to PSI. Finally with QT 4.1 it might be possible to do in a clean x-platform way! yea!


By am at Mon, 10/24/2005 - 11:07

Can we have some code-examples for this?
(and also for your other stuff like the rotating cube or the wobbling windows presented at akademy)


By hanno at Mon, 10/24/2005 - 20:54