Re: adding a page curl transition
Re: adding a page curl transition
- Subject: Re: adding a page curl transition
- From: Graham Cox <email@hidden>
- Date: Mon, 14 Sep 2009 13:57:32 +1000
On 14/09/2009, at 1:31 PM, Matt Neuburg wrote:
My question is simply this: what's the best strategy for
implementing this?
Unlike the Reducer tab view example, I don't have a view in advance
representing the future state of the window (i.e. what it will look
like
after the transition). I'm not substituting one view for another, I'm
altering the content of a whole bunch of fields at once and I want the
*whole* window to peel back to reveal the new values.
I'm thinking this is probably such a common thing to want to do that
someone
has already been down this road. Thx - m.
I've implemented this in a simple slideshow app that you can download
the source for. I just use Core Image - no point trying to roll your
own when the OS has a solution built right in - you need to have two
images in memory, the current one and the next one to show, and just
fill in the CI parameters, driving the time parameter from 0..1
This code dates from my first efforts with Cocoa so it might not be as
clean as it could be, and the Core Image stuff was grafted on when it
was first released. In other words, it might not be the best possible
code quality for a tutorial, but it works OK.
http://apptree.net/pictureshow.htm
(That's the app - I thought the source was there too but it isn't -
contact me off list if it hasn't gone up soon and you want it)
--Graham
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