Re: Handle drop to WebView: WebDragDestinationActionDHTML
Re: Handle drop to WebView: WebDragDestinationActionDHTML
- Subject: Re: Handle drop to WebView: WebDragDestinationActionDHTML
- From: Mike Abdullah <email@hidden>
- Date: Thu, 28 Oct 2010 01:08:45 +0100
Subclass WebView and override the standard NSDraggingDestination methods.
On 28 Oct 2010, at 00:19, Wayne Shao wrote:
> I would like to handle drop to WebView to not load the dropped object, but
> to perform some customized action.
> However, I ran into similar issues as described here:
>
> http://lists.apple.com/archives/webkitsdk-dev/2005/May/msg00046.html
>
> Basically, for these two callbacks in WebUIDelegate,
>
> - A. – webView:dragDestinationActionMaskForDraggingInfo:<http://developer.apple.com/library/mac/documentation/Cocoa/Reference/WebKit/Protocols/WebUIDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/instm/NSObject/webView:dragDestinationActionMaskForDraggingInfo:>
> -
> - B. – webView:willPerformDragDestinationAction:forDraggingInfo:<http://developer.apple.com/library/mac/documentation/Cocoa/Reference/WebKit/Protocols/WebUIDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/instm/NSObject/webView:willPerformDragDestinationAction:forDraggingInfo:>
> -
>
> My question is: How can I return something other
> than WebDragDestinationActionLoad in A and still have a chance to process
> the data in method B?
>
> Currently, the issues are:
>
>
> - If I return WebDragDestinationActionDHTML, B is never called.
> - If return WebDragDestinationActionLoad, B is called, but I do not want
> to load the dropped resource. I want to customize it by extracting data and
> update the current resource in WebView.
> - Another option is to do the custom data extraction in A and
> return WebDragDestinationActionNone. But the callback A is invoked multiple
> times during a drag/drop operation, I need to only process it once at the
> last callback. i.e., the correct place to do it is in callback method B.
>
> Any solutions?
>
> Thanks,
> --
> W. Shao
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