118382 - Implement opacity for popups and windows

Status: RESOLVED DUPLICATE of bug 113232

(Core :: XUL, enhancement, P5)

Description

[Hixie (not reading bugmail)]

We should properly support -moz-opacity for popups and windows. This means
checking to see what the computed value of the property is for the element being
popped up or the <window> or <dialog> element at the root of a chrome window,
and calling SetLayeredWindowAttributes() appropriately (on Windows XP, other
platforms will need to do this differently of course).

See: http://msdn.microsoft.com/library/en-us/winui/windows_3nar.asp

We should also support this property being changed on the fly. :-)

Comment 1

[David Hyatt]

Yes, I'm fully up to date on the layered window stuff (that works on Windows
2000 as well as XP).  That would enable us to properly support opacity for
popups on those operating systems.

Comment 2

[David Hyatt]

In theory we could make iframes support opacity as well using this mechanism.

Comment 3

[Anne (:annevk)]

Is this still a bug? (Recently '-moz-opactiy' changed into 'opacity'.)

Comment 4

[Martijn Wargers (dead)]

I guess this should work for <window>'s now that bug 113232 is fixed.
Transparency for popups didn't work the last time I checked. 
For <window>'s you need to add the attribute hidechrome="true" and load the xul
file from chrome in order for it to work.

Comment 5

[Anand Aiyer]

bug 70798 exists to add transparency support to popups