Re: NSOutlineView drag and drop problem
Re: NSOutlineView drag and drop problem
- Subject: Re: NSOutlineView drag and drop problem
- From: Dave DeLong <email@hidden>
- Date: Thu, 10 Jun 2010 00:27:37 -0600
What about a category on NSPasteboard that uses an associated object to store stuff in the NSDraggingInfo?
Dave
Sent from my iPhone
On Jun 10, 2010, at 12:12 AM, Graham Cox <email@hidden> wrote:
> I'm implementing drag and drop in an outline view.
>
> I implement –outlineView:validateDrop:proposedItem:proposedChildIndex: to return one of several drag operation constants depending on combinations of source, destination and the source mask. For example the operation can be a move or a copy depending on certain things, but <option> modifier key always forces a copy. That works and the cursor badging correctly reflects the intentions of the drag.
>
> In –outlineView:acceptDrop:item:childIndex: I can work out much the same set of conditions as above and mostly do the right thing, but since a move or a copy is equally likely, I need a way to determine what the last drag operation returned during validation actually was. There doesn't seem to be a way to do this by requesting it from any of the parameters passed to that method. How can I get that?
>
> I could easily store the last value I returned in an ivar in my controller but it seems that there should be a way to just ask the drag system for it without this being necessary.
>
>
> --Graham
>
>
> _______________________________________________
>
> Cocoa-dev mailing list (email@hidden)
>
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>
> Help/Unsubscribe/Update your Subscription:
>
> This email sent to email@hidden
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden