How to acquire absolute filepath of drag-and-dropped file

[Fredrik Averpil]

Hi,

I've created a custom QLabel class which allows dropping a file onto it. But I'm having issues with fetching the filepath of the dropped file when dropped from anything but a Windows drive letter. So for example if you drag and drop a file from a network share (which has not been mapped to drive letter), I'm not getting the absolute full path. Also, on Mac OS X my code does not seem to work at all.

I'm totally new to the whole drag and drop concept and I feel I haven't had the time to read up on this prior to dig into code. So I'm a little lost on the concept side of things.

Do I have to check for the filepath of the dropped file in several different ways? This seems somewhat odd...

Any tips or ideas on how to deal with this are very much welcome.

Cheers,

Fredrik

This is the code I have currently:

class DropableQLabel(QtGui.QLabel):
    def __init__(self, parent):
        super(DropableQLabel, self).__init__(parent)

        self.skalman = parent.skalman
        self.skalman.browser = parent

        self.setFixedWidth(300)
        self.setFixedHeight(169)
        self.setFrameShape(QtGui.QFrame.Box)
        self.setAlignment(QtCore.Qt.AlignCenter)
        self.setAcceptDrops(True)
        

    def dragEnterEvent(self, event):
        print 'Entered droppable area'
        if event.mimeData().hasUrls():
            event.acceptProposedAction()
        else:
            super(DropableQLabel, self).dragEnterEvent(event)


    def dropEvent(self, event):
        if event.mimeData().hasUrls():
            for url in event.mimeData().urls():
                print url.path() # this is not always an absolute filepath
                

            event.acceptProposedAction()
        else:
            super(DropableQLabel,self).dropEvent(event)

​

[Justin Israel]

I don't recall there being too much variation in the way you retrieve the path of a dropped file. You just check for the urls, and for text. It's up to the underlying platform specific code to deliver the mime info as part of its drop.

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[Fredrik Averpil]

Well, that's what I thought too, from reading the docs.

But when dragging a file from \\100.0.0.1\share\folder\file.txt onto my droppable widget will result in the url: /share/folder/file.txt ... with the whole hostname/ipaddr omitted from the url. A bit confusing...

// Fredrik

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[Justin Israel]

What happens when you drag and drop that same thing onto a cmd terminal? I might be wrong, but my guess is that it is the actual mime data being delivered to your application. 

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[Fredrik Averpil]

Hi Justin,

When I drop a file from \100.0.0.1\share\folder\file.txt  onto a cmd window (Windows 7), the whole path is entered in the cmd window.

// Fredrik

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[Justin Israel]

Hmm, then I guess the windows specific logic in Qt is doing something :-/

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[Fredrik Averpil]

I think I figured it out.

When dragging and dropping a file from a Windows UNC path, you need to also query url.host() to get the host name/ipaddr.

So with my (previously posted) code, this finally catches the correct filepath of such a file.

def dropEvent(self, event):
    if event.mimeData().hasUrls():
        for url in

 event.mimeData().urls():
            print url.host()
            print url.path()
            return url.host()+url.path() # absolute filepath for UNC/Windows

        event.acceptProposedAction()
    else:
        super(DropableQLabel,self).dropEvent(event)

​

Haven't tried this on OSX yet.

// Fredrik

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[Fredrik Averpil]

Uhh... not really sure why I was bothering with all of this when there was this: url.toLocalFile()

:)

That seems to work for all kinds of paths.

// Fredrik

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[johan Borgström]

Hi Fredrik,

Did you try this on  OS X Yosemite?

url.toLocalFile() returns '/.file/id=1234567.12345678'. It seems to be a bug in Qt. Is there a known workaround in PySide to get a usable file path?

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