OK that's great Mike, thanks a lot for your help.
As you say that's probably not something they will need to change over
time so long as WebView remains in its current form.
Anyway, hopefully you've given me my 'get out of jail card'.
Cheers
-- Luke
On 2009-10-25, at 3:30 AM, Mike Abdullah wrote:
That's because it's a private method. Have a look at the WebKit
source – WebUIDelegatePrivate.h
It's been there since WebKit 3.0 so will probably be around for a
while to come. And at worst, WebKit will just stop calling your
method and you'll have to find something else (or include a custom
build of WebKit).
Final option is to use an overlay window.
On 24 Oct 2009, at 20:27, Luke Evans wrote:
Oh-oh. OK, 'tis as I feared then - I was living on a wing and a
prayer with Leopard (which did work perfectly in this regard to my
use of WebView in a layer-backed view hierarchy - i.e. at the
bottom of the stack).
I took a look at WebUIDelegate (as I think I had done a long while
back, while playing with how to draw over the top of web content).
I can't see from the docs how to use such a delegate to draw over
the web content. The delegate seems to be empowered to control a
lot of the expected user interactions, but I'm not sure how you
would draw with it.
BTW, I tried subclassing WebView when I was playing with it, way
back, but couldn't get the subclass to draw the web content before
my annotations. At the time I just called the superclass draw
method and then attempted to draw the annotations. Maybe I was
being too simplistic about it, and that having my own graphics
context or something would have made that work.
On 2009-10-24, at 3:36 AM, Mike Abdullah wrote:
WebView's don't support being layer-backed. But there is a private
WebUIDelegate method that will let you achieve what you want:
- (void)webView:(WebView *)sender didDrawRect:(NSRect)rect;
On 24 Oct 2009, at 00:53, Luke Evans wrote:
I have an app that plain stopped working between Leopard and Snow
Leopard.
This app relies on placing a WebView component in a Core
Animation layer view hierarchy (i.e. "Needs Core Animation Layer"
flag is turned on for this view and its superviews), so that I
can draw annotations over the web content with a mostly-
transparent 'glass view' in a layer above.
What I've found so far is that if I turn off the "Needs Layer"
flag on the WebView and all its superviews, then the web content
is visible. If I leave this flag on however, then all I get is a
plain white area, with no web content visible (though this
continues to be loaded).
I have logged this as a bug already - mostly because its a
behaviour change between Leopard and Snow Leopard, and I have not
found any documentation that indicate this is an intentional
change.
However, it _might_ be intentional, or possibly I was already
flying by the seat of my pants to have it working in the first
place. In any case, perhaps somebody has some concrete knowledge
on the subject...?
Cheers
-- Luke
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