Re: CFPasteboardResolveAllPromisedData crash

• Subject: Re: CFPasteboardResolveAllPromisedData crash
• From: David Kocher <email@hidden>
• Date: Tue, 1 Feb 2005 00:47:14 +0100
• Delivered-to: email@hidden
• Delivered-to: email@hidden

For whatever reason I get a
	Can't cache image
error message in the console.log

-dk

On 31. Jan 2005, at 18:14, Adam Maxwell wrote:

On Monday, January 31, 2005, at 08:08AM, Nick Zitzmann <email@hidden> wrote:

On Jan 31, 2005, at 8:29 AM, David Kocher wrote:

While searching for this problem in the archives I also found the
discussion about the 'frozen' message queue problem described in this
[ http://www.cocoabuilder.com/archive/message/cocoa/2003/5/15/81424 ]
thread which I can't solve proberly as well because of the slideback
'table row image' drawn when returning YES from
tableViewWriteRowsToPasteboard:. Is anyone out there who knows a
solution for this by now?

The only solution for the message queue freeze problem that does not
involve using private APIs is to subclass NSTableView, override
-mouseDown:, and rewrite almost all of the functionality of the method.
Which means it'll have to handle selecting rows and sending single and
double-click actions. This breaks NSTableView's periodic event
handling, so -mouseDragged: will be called when the mouse is dragged,
and there you can begin the file-promise drag. If you begin a
file-promise drag in -mouseDragged:, then the message queue will not
freeze.

Warning: This will probably also break the NSTableView -clickedRow
method.

We've all filed bugs on this, right? Overriding -mouseDown: for NSTableView is insane if you want to preserve all of the proper selection/dragging behavior.

Someone else in this group also figured out a way of doing this that
doesn't involve overriding -mouseDown:, but does involve dependence on
private AppKit APIs. I don't recommend doing this, but the message
should be in the archives.

I did it without using private API or overriding -mouseDown:, so it can be done (the basic solution I used should be in the archives as well). It's not what the documentation recommends, but at least it works.

--
Adam

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