atreiu's dashboard

Similar request here: http://getsatisfaction.com/songbird/t... (but not strictly associated with itunes)
No response by the company, yet...

PS: I think the observer/listener you need to get the height/width changes is one of these:

sbIServicePaneListener:
http://developer.songbirdnest.com/add...

sbIDisplayPaneListener:
http://developer.songbirdnest.com/add...

BTW, you can post you question in the extension/feathers developers-forum, too:
http://groups.google.com/group/songbi...

I have a question, too, i'm hoping you might have an answer, because its "small-screen" related: Did you already find a way to skip the min-width for the Songbird-Application? Currently the window can only be resized to 640x480, not smaller. Setting the min-width-value for #mainplayer didn't help :-/

1.) I think "collapse" will be better, with "hidden" you have an empty row, with "collapse" the row is completely gone: http://www.w3schools.com/CSS/pr_class... (But as you said: just test it out)

2.) The Mozilla website really helped me with better documentation on XUL, even if its not songbird-specific: http://www.mozilla.org/projects/xul/

3.) Did you tried the min- and max-width? Maybe for the width, you have to set the width-values of servicepane, not for album-art-pane? Because albumart-pane is a child of servicepane? But you are right, if you need to set relative-values (100%), you can't achieve a square with css, because you have to check what the height is, to set the width. Absolute values (150px) should work.
To use relative values, I think you have to implement an "observer" via XUL (See tutorial on the extension-developer site), to get the value and changes of the height (the hard part), then you can set the fitting width via Javascript (the easy part).