Re: Custom progress bar for QTMovie??
Re: Custom progress bar for QTMovie??
- Subject: Re: Custom progress bar for QTMovie??
- From: douglas welton <email@hidden>
- Date: Wed, 21 Apr 2010 10:57:04 -0400
Chase,
The method I use for doing this relies on QuickTime, not QTKit. Even so, I think it is most effective. I implement a movieController action callback filter. This method is demonstrated in the "Adding New Capabilities to the QTKitPlayer Application" section of this document:
<http://developer.apple.com/legacy/mac/library/documentation/QuickTime/Conceptual/QTKitProgrammingGuide/Chapter05/AddingToQTKitPlayer.html#//apple_ref/doc/uid/TP40001245-CH207-TPXREF101>
later,
douglas
Establish a
On Apr 20, 2010, at 11:09 PM, Chase Meadors wrote:
> I'm making a completely custom CoreAnimation-based view that plays an audio media stored in a QT movie. However, I'm struck with an implementation problem with indicating the current time in the movie.
>
> Ideally, if QTMovie defined a currentTime property, I could use bindings or a binding-like design to handle the implementation of some time text & progress bar. However, QTMovie does not define it as a property. It appears setCurrentTime is not meant as an accessor to the variable; it's not called when current time changes. There also is no delegate method or anything that is called when currentTime changes.
>
> I could setup a timer to check on my QTMovie's currentTime, but that seems silly to setup a 1 second timer to check that the current time has increased by 1 second, when I could just maintain my own current time property.
>
> As said before, I could maintain my own currentTime property, incrementing it every second that the QTMovie is playing, and I suppose re-sync it whenever the user manually changes the currentTime. However, this just seems like horrible design.
>
> So anyway, QTMovie doesn't appear to support a bindings like design for it's currentTime, so how would one go about implementing a custom progress slider, or text, representing the current time of a QTMovie??
>
> Thanks for any thoughts! -Chase
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