NSImageView Drop

[IsaiahvH]

Hi there,

I’m really ashamed to ask my question, as I’ve found other forums already discussing it, but I didn’t understand it fully, so if someone would be so extremely kind to explain it (step by step) to me, I would very, very, grateful.

I’ve an “AppDelegate.applescript”.
All I want is that if the user drags an image into my NSImageView, I can get the source of that image.
How do I do that?

TechExpertHD said: (http://macscripter.net/viewtopic.php?id=37889)

Okay for people that have this same problem, step by step I’ll explain how to do this:

1. Create a new applescript class in your project.
2. The content of the class should be this:

script (Script Name)
property parent : class "NSImageView"

on draggingEntered_(info)
return current application's NSDragOperationCopy
end draggingEntered_

on performDragOperation_(info)
set pb to info's draggingPasteboard()
set theURL to pb's readObjectsForClasses_options_({current application's NSURL},missing value)'s lastObject()
set randomVar to theURL's lastPathComponent()
log randomVar
return true
end performDragOperation_

end script

3. In your app delegate input the following code:

(Script Name)'s registerForDraggedTypes_({"public.file-url"})

4. In Interface Builder, find your class called (Script Name) in the “Classes” section of your Library.
5. Add it to your project by drag and dropping it onto a window or some place else.
6. Build and Run!

(Me again)
But I don’t understand it fully…

1. Create a new applescript class in your project.

Does that mean I should just add an “blabla.applescript” file?
Or should a insert another “on TheScript”, “end script” in my already existing “AppDelegate.applescript”?

3. In your app delegate input the following code:

Which app delegate? My “AppDelegate.applescript”? (That sounded rather stupid).

4. In Interface Builder, find your class called (Script Name) in the “Classes” section of your Library.

Ehh. Library?
I could only find the “File Template-, Code Snippet-, Object- and Media Library” in the bottom-right corner.

I do realize my questions are rather weird and for you probably obvious, but I would be grateful if you were to answer them.

Thanks in advance,

Isaiah van Hunen

Model: iMac
AppleScript: 2.4.3
Browser: Google Chrome
Operating System: Mac OS X (10.7)

[Pezwell]

Hi Isaiah

The correct advice will depend on the version of Xcode that you are using. There are major differences between version 3 and version 4.

You seem like someone that is willing to figure things out, so my very short and lazy reply would be to look at the following link.

http://allancraig.net/index.php?option=com_docman&task=doc_download&gid=14&Itemid=100

This is a full project that you can check out. It basically does exactly what you are looking for. Download it and check out how the whole project is structured.
Also, check out the rest of the above site, it has a few other great example.

Good Luck

Regards

PJ

[Shane_Stanley]

@IsaiahvH

1. Create a new applescript class in your project.

Does that mean I should just add an “blabla.applescript” file?
Or should a insert another “on TheScript”, “end script” in my already existing “AppDelegate.applescript”?

Preferably a separate file.

3. In your app delegate input the following code:

Which app delegate? My “AppDelegate.applescript”?

Yes.

4. In Interface Builder, find your class called (Script Name) in the “Classes” section of your Library.

Ehh. Library?
I could only find the “File Template-, Code Snippet-, Object- and Media Library” in the bottom-right corner.

Click on your image view, show the Identity Inspector, and change the Custom Class to your new class name.

[IsaiahvH]

I’m so sorry…
I already got it by now…
Dunno why it didn’t work before though.
For others, I used this description:

@mekronk

Woo hoo! That worked. For anyone else trying to do the same, and you’re even more of a newbie than me, here is what I did. Just to experiment I created an NSBox object in my gui and then in the delegate script I entered:

script MSDropBox
	property parent : class "NSBox"
	
	on draggingEntered_(sender)
		log "entered"
		set pb to sender's draggingPasteboard()
		set theOptions to {NSPasteboardURLReadingFileURLsOnlyKey:1}
		return pb's canReadObjectForClasses_options_({current application's |NSURL|}, theOptions)
	end draggingEntered_
	
	on performDragOperation_(sender)
		log "perform"
		-- Get the file paths
		set pb to sender's draggingPasteboard()
		set theOptions to {NSPasteboardURLReadingFileURLsOnlyKey:1}
		set theURLs to pb's readObjectsForClasses_options_({current application's |NSURL|}, theOptions)
		log theURLs
		return true
	end performDragOperation_
end script

I also added this code to the applicationWillFinishLaunching_ handler:

		my dropBox's registerForDraggedTypes_({"public.file-url"})

where drop box has been connected to the box in IB. In interface builder I changed the class of my box from NSBox to MSDropBox. That was it.

Curiously, I could not get this to work with an NSTableView (the performDragOperation was ignored), but it did work for the NSScrollView of the table.