Re: MacOSX-dev Digest, Vol 102, Issue 2

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Adam Nash
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On Oct 7, 2012, at 12:00 PM, [email protected] wrote:

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> Today's Topics:
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>   1. Re: Dragging file promises (Fritz Anderson)
>   2. Re: Dragging file promises (Christiaan Hofman)
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> From: Fritz Anderson <[email protected]>
> Subject: Re: Dragging file promises
> Date: October 6, 2012 12:35:58 PM PDT
> To: Christiaan Hofman <[email protected]>
> Cc: "macosx-dev ;cocoa-dev" <[email protected]>
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> On 6 Oct 2012, at 6:24 AM, Christiaan Hofman <[email protected]> =
wrote:
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>> I am trying to figure out how to drag file promises from views such =
as NSTableView. Before 10.6, I knew how to do this using =
NSFilesPromisePboardType and the =
namesOfPromisedFilesDroppedAtDestination: delegate methods.
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> I'm having trouble getting my head around any of this. For instance, -
> namesOfPromisedFilesDroppedAtDestination: isn't a delegate method, but =
a part of a protocol. And I don't see how NSTableView would know to call =
dragPromised... "implicitly," given that it never knows that it contains =
things that could me converted into file promises.
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> Could you post your code, please?
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> 	=97 F
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> --=20
> Fritz Anderson -- Xcode 4 Unleashed: 4.5 supplement in the works -- =
<http://x4u.manoverboard.org/>
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> From: Christiaan Hofman <[email protected]>
> Subject: Re: Dragging file promises
> Date: October 6, 2012 1:45:45 PM PDT
> To: Fritz Anderson <[email protected]>
> Cc: "macosx-dev ;cocoa-dev" <[email protected]>
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> On Oct 6, 2012, at 21:35, Fritz Anderson wrote:
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>> On 6 Oct 2012, at 6:24 AM, Christiaan Hofman <[email protected]> =
wrote:
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>>> I am trying to figure out how to drag file promises from views such =
as NSTableView. Before 10.6, I knew how to do this using =
NSFilesPromisePboardType and the =
namesOfPromisedFilesDroppedAtDestination: delegate methods.
>>=20
>> I'm having trouble getting my head around any of this. For instance, =
-
>> namesOfPromisedFilesDroppedAtDestination: isn't a delegate method, =
but a part of a protocol.
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> A protocol for a delegate (it's not a delegate you set explicitly, but =
the dragging source is implicitly used as the delegate for the drag =
operation.) Moreover, a corresponding method is a delegate (or more =
precisely datasource) method for NSTableView, which is really what it =
passes through in the end of the drop.
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>> And I don't see how NSTableView would know to call dragPromised... =
"implicitly," given that it never knows that it contains things that =
could me converted into file promises.
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> If you put a NSFilesPromisePboardType on the dragging pasteboard from =
the NSTableView datasource method =
tableView:writeRowsWithIndexes:toPasteboard:  (remember, I am talking =
about dragging, and this is how you start a drag from NSTableView), then =
promised files are dragged automatically, which should go through the =
view method implicitly (i.e. you don't have to do that yourself, =
NSTableView does this for you.) And at the drop the =
namesOfPromisedFiles... method is called.
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>> Could you post your code, please?
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>> 	=97 F
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> It really should not matter that much what the code is. The bottom =
line from this is that I say that I know how to drag file promises using =
the old API. And my question is how to drag file promises using the new =
API and UTIs. I did not go into detail, and really think I shouldn't, =
because anyone who could answer my question would know what I am talking =
about, and the code should be straightforward but tedious. So if you =
don't know what I am talking about, you almost certainly won't be able =
to answer my question.
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> Christiaan
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