NSPathcontrol and own drag and drop

[akader]

I am triying to implement a nspathcontrol and want to handle the drag and drop operation within the code, but i am having problems. The draggingEntered and performDragOperation are not reacting.
What am I doing wrong?

[code] property templatePathControl : missing value – connected to pathcontrol in UI

     on applicationWillFinishLaunching_(aNotification)
	templatePathControl's registerForDraggedTypes_({"public.file-url"})
    end applicationWillFinishLaunching_

    on draggingEntered_(sender)
	log "draggingEntered_"
	set pb to sender's draggingPasteboard()
	set theOptions to {NSPasteboardURLReadingFileURLsOnlyKey:1}
	set theresult to pb's canReadObjectForClasses_options_({current application's |NSURL|}, theOptions)
	return theresult
end draggingEntered_

on performDragOperation_(sender)
	-- Get the file path
	tell me to log "performDragOperation_"
	set pb to sender's draggingPasteboard()
	set theOptions to {NSPasteboardURLReadingFileURLsOnlyKey:1}
	set imageURLs to pb's readObjectsForClasses_options_({current application's |NSURL|}, theOptions)
	set draggedURL to item 1 of (imageURLs as list)
	set filePath to draggedURL's |path|()
	return true -- otherwise it doesn't happen
end performDragOperation_[/code]

[leonsimard]

Maybe this is related, not sure, but you do need this for drag and drop of files onto the app’s icon. Did you declare the document types you wish to be “seen” by your drag operation? In the Info panel of your Target, under the Properties Tab…

Also, I see you only register the public.file-url in the registerForDraggesTypes method, in the Docs it says:

NSPathControl automatically supports drag and drop, which can be further customized via delegate methods. To accept drag and drop, NSPathControl calls registerForDraggedTypes: with NSFilenamesPboardType and NSURLPboardType. When the URL value in the NSPathControl object changes because of an automatic drag and drop operation or the user selecting a new path via the open panel, the action is sent.

Maybe this is the reason why it doesn’t work. Plus, maybe someone else can confirm, but based on what is said in the Docs, the dragging of a URL onto a Path control seems to be a fairly automatic process…

Browser: Safari 531.22.7
Operating System: Mac OS X (10.6)

[akader]

Dropping a file on the app icon is not a problem and is working.
The problem is more the dragging en dropping of files on the pathcontrol widget in the UI.
The automatic handling of the drag and drop is no problem and works too.
I want to catch the the drop to take actions and accept or reject the dropped files.

[leonsimard]

Oh, then this is totally different than what I understood from your original post.

Have you looked at NSPathControlDelegate in the Docs? Especially the pathControl:validateDrop: method. I think this is what you are looking for.

You need to set a delegate for the path control and implement a few methods, but otherwise it looks feasible.

Browser: Safari 531.22.7
Operating System: Mac OS X (10.6)

[akader]

Thanks for the answer. It is the way to do it.

in the awakefromnib or on willfinishlaunching we register the drag

pathControl's registerForDraggedTypes_({current application's NSFilenamesPboardType})

then we need the following methods:

[code]on pathControl_validateDrop_(sender, draginfo)
– return the type of operation you want
return current application’s NSDragOperationCopy
end pathControl_validateDrop_

on pathControl_acceptDrop_(sender, draginfo)
– your code here

– true to accept , false to deny the drop
return true or false
end pathControl_acceptDrop_[/code]