Re: Cover Flow in Cocoa?

[John C. Randolph]

On May 28, 2008, at 2:19 PM, Scott Anguish wrote:


I really can't stress how bad an idea using private API is.


Speaking as a former DTS engineer, I will second Scott's statement  
above.


-jcr
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Re: Cover Flow in Cocoa?

[Scott Anguish]

Jens (ex-Apple) is speaking from experience here (not from using  
private API, but from how things work)


Apple can change private API at any time because Apple controls all  
the apps that use it.  Teams can be made aware that change "foo" is  
happening, and they can be required to make alter their code to be  
compliant with that change. Making an API public can require major  
changes, or very minor ones (changing the name of a method ever so  
slightly based on feedback internally).


As Jens said, this happens all the time.



I really can't stress how bad an idea using private API is.





On May 28, 2008, at 3:51 PM, Alexander Cohen wrote:


On May 28, 2008, at 11:08 AM, Jens Alfke wrote:



On 28 May '08, at 1:04 AM, Steve Harrison wrote:

On another thread on the Apple Mailing Lists, Alexander Cohen said  
that there is an API in Leopard for CoverFlow (see archived post  
here: "http://www.cocoabuilder.com/archive/message/cocoa/2007/11/6/192424 
"):


Yeah, but that's private API. I wouldn't use that in a serious app,  
as it could change incompatibly or be taken out in any future OS  
release. (The former is quite likely: a primary reason why  
frameworks or classes don't get made public is that Apple hasn't  
polished their APIs yet. Making something public involves  
committing to supporting binary compatibility with it, which really  
limits what you can do with the API, and Apple doesn't take that  
lightly.)


I agree with you on that. The only reason i would see for using them  
is that the CoverFlow Private API is pretty much interchangeable  
with the ImageKit Browser API. This does at least show some sort of  
consistency and might point to the IKImageFlow being made public  
soon (I hope).


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Re: Cover Flow in Cocoa?

[Scott Anguish]

On May 28, 2008, at 4:04 AM, Steve Harrison wrote:

On another thread on the Apple Mailing Lists, Alexander Cohen said  
that there is an API in Leopard for CoverFlow (see archived post  
here: "http://www.cocoabuilder.com/archive/message/cocoa/2007/11/6/192424 
"):


there is no public, useable, API for Coverflow.

reverse engineering, and using, a private API is bad. your app will  
break in the future.



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Re: Cover Flow in Cocoa?

[Alexander Cohen]

On May 28, 2008, at 11:08 AM, Jens Alfke wrote:



On 28 May '08, at 1:04 AM, Steve Harrison wrote:

On another thread on the Apple Mailing Lists, Alexander Cohen said  
that there is an API in Leopard for CoverFlow (see archived post  
here: "http://www.cocoabuilder.com/archive/message/cocoa/2007/11/6/192424 
"):


Yeah, but that's private API. I wouldn't use that in a serious app,  
as it could change incompatibly or be taken out in any future OS  
release. (The former is quite likely: a primary reason why  
frameworks or classes don't get made public is that Apple hasn't  
polished their APIs yet. Making something public involves committing  
to supporting binary compatibility with it, which really limits what  
you can do with the API, and Apple doesn't take that lightly.)


I agree with you on that. The only reason i would see for using them  
is that the CoverFlow Private API is pretty much interchangeable with  
the ImageKit Browser API. This does at least show some sort of  
consistency and might point to the IKImageFlow being made public soon  
(I hope).


AC
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Re: Cover Flow in Cocoa?

[Jens Alfke]

On 28 May '08, at 1:04 AM, Steve Harrison wrote:

On another thread on the Apple Mailing Lists, Alexander Cohen said  
that there is an API in Leopard for CoverFlow (see archived post  
here: "http://www.cocoabuilder.com/archive/message/cocoa/2007/11/6/192424 
"):


Yeah, but that's private API. I wouldn't use that in a serious app, as  
it could change incompatibly or be taken out in any future OS release.  
(The former is quite likely: a primary reason why frameworks or  
classes don't get made public is that Apple hasn't polished their APIs  
yet. Making something public involves committing to supporting binary  
compatibility with it, which really limits what you can do with the  
API, and Apple doesn't take that lightly.)


—Jens

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Re: Cover Flow in Cocoa?

[Steve Harrison]

Hello,

Here are several things that might be of help...

As stated by Nick Zitzmann, Apple has a sample Cover Flow-style  
application called "CovertFlow", which is located at "/Developer/ 
Examples/Quartz/Core Animation/CovertFlow/".


On another thread on the Apple Mailing Lists, Alexander Cohen said  
that there is an API in Leopard for CoverFlow (see archived post here:  
"http://www.cocoabuilder.com/archive/message/cocoa/2007/11/6/192424";):



The name of the class is IKImageFlowView and it's in ImageKit. The API
is very similar to the other image kit classes. The dataSource and
delegates are almost the same. I have a working app that uses the
class and it's really nice ( Its not a shipping app, just test
purposes ). Very easy to set up.


There is also a tutorial on adding a Cover Flow view & Quick Look  
effects to a photo application at MacResearch: "http://macresearch.org/cocoa-tutorial-image-kit-cover-flow-and-quicklook-doing-things-we-shouldnt-are-too-fun-resist 
".


Quill
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Re: Cover Flow in Cocoa?

[colo]

Dumb question. But has anyone tried to recreate the Real First
Coverflow? The one that started thais whole thing. The Cover flow app
had a really smooth animation dynamic, and ever tilted overhead just
so slightly. That one was just awesome compared to the current
coverflow like



On Tue, May 27, 2008 at 11:33 AM, Bill Dudney <[EMAIL PROTECTED]> wrote:
> Hi Wayne,
>
> A screen cast in which I build out a custom cover flow impl using core
> animation and your iPhoto library just launched today;
>
> http://www.pragprog.com/screencasts/v-bdcora/creating-a-compelling-user-interface-with-core-animation
>
> The free intro shows the app that is built out.
>
> Any feedback would be greatly appreciated.
>
> HTH,
>
> -bd-
> http://bill.dudney.net/roller/objc
>
> On May 23, 2008, at 3:33 PM, Wayne Shao wrote:
>
>> I am thinking to use Cover Flow in cocoa app.
>>
>> - Is this a good idea for a desktop/laptop app?
>> - What APIs are available?
>>
>> Thanks,
>>
>> --
>> Wayne Shao
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Re: Cover Flow in Cocoa?

[Peter Maurer]

I am thinking to use Cover Flow in cocoa app.

- Is this a good idea for a desktop/laptop app?
- What APIs are available?


I wouldn't go as far as calling this an API, but feel free to look at  
the main header file of my Cover Flow implementation, which is  
implemented as a stand-alone bundle because it's supposed to work with  
applications that target Mac OS X 10.4 as well:


<http://www.manytricks.com/developer/PMFlowView.h>

If you think PMFlowView could be useful to you, I'd be happy to  
discuss details off list. :-)


Best,

Peter.
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Re: Cover Flow in Cocoa?

[Jonathan del Strother]

On Fri, May 23, 2008 at 10:33 PM, Wayne Shao <[EMAIL PROTECTED]> wrote:
> I am thinking to use Cover Flow in cocoa app.
>
> - Is this a good idea for a desktop/laptop app?
> - What APIs are available?

CoverFlow outside of iTunes?  Terrible idea, it'll never take off.
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Re: Cover Flow in Cocoa?

[Wayne Shao]

On Fri, May 23, 2008 at 2:40 PM, Nick Zitzmann <[EMAIL PROTECTED]> wrote:

>
> On May 23, 2008, at 3:39 PM, Wayne Shao wrote:
>
>  I never tried this on non-touch based devices. Not sure on the
>> scrolling/selection experience. Any standard Apple apps with this interface?
>>
>
>
> Finder and iTunes both use cover flow.
>
oh! I did not know this until now. thanks!

>
>
> Nick Zitzmann
> 
>
>


-- 
Wayne Shao
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Re: Cover Flow in Cocoa?

[Nick Zitzmann]

On May 23, 2008, at 3:39 PM, Wayne Shao wrote:

I never tried this on non-touch based devices. Not sure on the  
scrolling/selection experience. Any standard Apple apps with this  
interface?



Finder and iTunes both use cover flow.

Nick Zitzmann


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Re: Cover Flow in Cocoa?

[Wayne Shao]

Thanks,

On Fri, May 23, 2008 at 2:37 PM, Nick Zitzmann <[EMAIL PROTECTED]> wrote:

>
> On May 23, 2008, at 3:33 PM, Wayne Shao wrote:
>
>  I am thinking to use Cover Flow in cocoa app.
>>
>> - Is this a good idea for a desktop/laptop app?
>>
>
> Why not?


I never tried this on non-touch based devices. Not sure on the
scrolling/selection experience. Any standard Apple apps with this interface?

>
>
>  - What APIs are available?
>>
>
>
> The only built-in one is private. You can make your own using CoreAnimation
> though; search your drive for the "CovertFlow" sample.


> Nick Zitzmann
> <http://www.chronosnet.com/>
>
>


-- 
Wayne Shao
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Re: Cover Flow in Cocoa?

[Nick Zitzmann]

On May 23, 2008, at 3:33 PM, Wayne Shao wrote:


I am thinking to use Cover Flow in cocoa app.

- Is this a good idea for a desktop/laptop app?


Why not?


- What APIs are available?



The only built-in one is private. You can make your own using  
CoreAnimation though; search your drive for the "CovertFlow" sample.


Nick Zitzmann
<http://www.chronosnet.com/>

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Cover Flow in Cocoa?

[Wayne Shao]

I am thinking to use Cover Flow in cocoa app.

- Is this a good idea for a desktop/laptop app?
- What APIs are available?

Thanks,

-- 
Wayne Shao
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