Nontrivial Undo Support for WebView
Nontrivial Undo Support for WebView
- Subject: Nontrivial Undo Support for WebView
- From: "Benjamin Jackson" <email@hidden>
- Date: Tue, 15 May 2007 20:02:07 -0300
Hi all,
I'm working on an application which uses a WebView that interacts with
some external controls. The controls modify my Model class, which
generates some HTML and outputs it into the WebView by loading a
temporary file.
This was all well and good until I tried to add undo support to my
application. I tried subclassing WebView and setting undoManager: to
return the same UndoManager as my Model, which worked until a page
reload was required, at which point the UndoManager seemed to push
only the WebView's undo commands off the stack. This sort of makes
sense, since I imagine that the intent of the designers was that if
I'm reloading a page I'm probably opening up a new document and won't
need those actions anymore.
I've found one example of seamless undo with an NSTextField and other
controls in the Vermont Cocoa Recipe's sample code
(http://www.stepwise.com/Articles/VermontRecipes/), but none of those
actions modify the contents of the text view, and I doubt it will work
for my case.
Does anyone have an idea what I can do to work around this? I imagine
there's some methods hiding in the WebView docs that I can override to
get an elegant solution for this.
Thanks,
Ben
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