How do I convert an osx fileid to a filepath [duplicate] - macos

Question

I am essentially repeating a question that was asked (but not answered) in the comments of PyQt: Getting file name for file dropped in app .
What I'd like to be able to do, a la that post, is convert an output from a file drop event in pyqt that currently looks like this:
/.file/id=6571367.661326 into an actual file path (i.e. /.Documents/etc./etc./myProject/fileNeeded.extension)
so that I can make use of the file that made the attempted QDropEvent. how to do this. Any thoughts?
EDIT:
As mentioned below in the comments, this appears to be a platform specific problem. I am running Mac OS X El Capitan (10.11.2)

Answer 1

I figured out the solution after translating Obj-C code found in https://bugreports.qt.io/browse/QTBUG-40449. Note that this solution is only necessary for Macs running OS X Yosemite or later AND not running PyQt5 (i.e. running v.4.8 in my case).
import objc
import CoreFoundation as CF
def getUrlFromLocalFileID(self, localFileID):
localFileQString = QString(localFileID.toLocalFile())
relCFStringRef = CF.CFStringCreateWithCString(
CF.kCFAllocatorDefault,
localFileQString.toUtf8(),
CF.kCFStringEncodingUTF8
)
relCFURL = CF.CFURLCreateWithFileSystemPath(
CF.kCFAllocatorDefault,
relCFStringRef,
CF.kCFURLPOSIXPathStyle,
False # is directory
)
absCFURL = CF.CFURLCreateFilePathURL(
CF.kCFAllocatorDefault,
relCFURL,
objc.NULL
)
return QUrl(str(absCFURL[0])).toLocalFile()
To see this working in a drag and drop situation, see below:
import sys
import objc
import CoreFoundation as CF
from PyQt4.QtGui import *
from PyQt4.QtCore import *
class MyListWidget(QListWidget):
def __init__(self, parent):
super(MyListWidget, self).__init__(parent)
self.setAcceptDrops(True)
self.setDragDropMode(QAbstractItemView.InternalMove)
def getUrlFromLocalFileID(self, localFileID):
localFileQString = QString(localFileID.toLocalFile())
relCFStringRef = CF.CFStringCreateWithCString(
CF.kCFAllocatorDefault,
localFileQString.toUtf8(),
CF.kCFStringEncodingUTF8
)
relCFURL = CF.CFURLCreateWithFileSystemPath(
CF.kCFAllocatorDefault,
relCFStringRef,
CF.kCFURLPOSIXPathStyle,
False # is directory
)
absCFURL = CF.CFURLCreateFilePathURL(
CF.kCFAllocatorDefault,
relCFURL,
objc.NULL
)
return QUrl(str(absCFURL[0])).toLocalFile()
def dragEnterEvent(self, event):
if event.mimeData().hasUrls():
event.acceptProposedAction()
else:
super(MyListWidget, self).dragEnterEvent(event)
def dragMoveEvent(self, event):
super(MyListWidget, self).dragMoveEvent(event)
def dropEvent(self, event):
if event.mimeData().hasUrls():
event.setDropAction(Qt.CopyAction)
event.accept()
links = []
for url in event.mimeData().urls():
if QString(url.toLocalFile()).startsWith('/.file/id='):
url = self.getUrlFromLocalFileID(url)
links.append(url)
else:
links.append(str(url.toLocalFile()))
for link in links:
self.addItem(link)
else:
super(MyListWidget,self).dropEvent(event)
class MyWindow(QWidget):
def __init__(self):
super(MyWindow,self).__init__()
self.setGeometry(100,100,300,400)
self.setWindowTitle("Filenames")
self.list = MyListWidget(self)
layout = QVBoxLayout(self)
layout.addWidget(self.list)
self.setLayout(layout)
if __name__ == '__main__':
app = QApplication(sys.argv)
app.setStyle("plastique")
window = MyWindow()
window.show()
sys.exit(app.exec_())