There is no list of items that can be overlayed because almost any xul
item can be overlayed - including overlays, you just need to know what
item you want to overlay by looking at the xul source of what you want
to add something to .
So overlays work like this:
in a given xul file there are elements that have id's and almost any id
can be overlayed( in other langs they say interpolate), almost any xul
element can contain other xul elements. Lets say there is a menu you
want to add a menuitem to:
- orginal xul(say in browser.xul): <menu id="CoolMenu"> <menuitem
id="VeryCool"/></menu>
- overlay(say coolmenuOverlay.xul) to add HotItem: <menu id="CoolMenu">
<menuitem="HotItem">
Would overlay the CoolMenu adding HotItem to the end of the menu.
And the chrome.manifest would look like:
overlay chrome://browser/content/browser.xul
chrome://myextension/content/coolmenuOverlay.xul
The main thing is that you overlay an item that has id with a valid xul
item for the widget you are overlaying. Theres more to it than that but
that is the basic idea. Overlays are really pretty simple but can be
confusing until you get the idea, then they seem simple until you get
past the initial basic idea :) They are very similar to compound widgets
in tcl/tk except they can be 'smart' bringing style and
functionality(js) info in with them.
Michael Buckley wrote:
In other words you don't understand overlays.
When you use the chrome.manifest to overlay an xul file like this
overlay chrome://browser/content/browser.xul
chrome://editor/content/overlay.xul
The first parts states that it is an overlay. The second is the chrome
path to what I want to overlay. The last is my file.
So do you what a list of every thing in the chrome://browser/content/
folder? Go to the chrome folder extract Browser.jar got to the content
then browser folders. And you can overlay every xul file there if you
want to. No one is going to list every xul file in FireFox for you when
you can just look to see them yourself.
God Bless
Michael
Gareth Hunt wrote:
Hi all,
I understand how overlays work, but does anyone know of a reference
that describes or lists the ids where overlays can be applied?
There is not a particular id that I'm looking for. I am curious to
know to what extent overlays can be applied, but have not been able
to find a reference the describes all the overlay points. I'm
particularly interested in Firefox, but references for any of the
other applications would be welcome too.
I've tried xulplanet, and various google searches, but to no avail.
Thanks,
Gareth
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