[Project_owners] Overlay reference ids

[Michael Buckley]

And then of course there is

<?xul-overlay href="chrome://foo/content/foo.xul"?>

If you are writing the xul file and what to add another to it.  But no
one seems to use that, don't know why.

God Bless
Michael

massey wrote:
>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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>>>
>>>
>>
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