Can we create a menu\panel like in Blender 2.4x ?


Really miss this type of menu\panel. If you, for example, work only with “View Properties” at the moment do you really need a toolbar that steals vertical space all the way up? It would be great if we could force regular 2.6-2.7 menus to not disappear while performing other , non-menu actions… Right now i’m digging blender sources, but the structure of events handling is not very clear for me, to be honest.
So, maybe, there is some relatively simple way to do this with Python?
PLEASE:( Just a simple (popup) menu which stays alive while you rotating you scene or moving object etc… Is this really such a non-trivial task?

I would call that a popup window. You can construct a popup using the current 2.7 API. I believe 2.71 makes these previously locked in place popups draggable.
https://developer.blender.org/rBdef5999f9b04368aa21485b514c0931f6fb43d8e

Here is an example image of a popup window from the RE:Ring AddOn.

Well, actually i want that popup to stay visible while navigating the scene. But I’v tried that addon and it behave like normal popup (which i know how to script). Or am i missing some ‘pin’ button?

Nope, there is no way to keep it visible.