def dropEvent(self, e: QDropEvent):
"""Handle Drag and Drop events. The :py:class:`QDropEvent`
performs the actual drop operation.
We support the following operations: if an Image is dropped,
we will use it as input image for the :py:class:`Toolbox`.
"""
mimeData = e.mimeData()
if mimeData.hasUrls() and self._toolbox:
# 1. We just consider the first URL, even if multiple URLs
# are provided.
url = mimeData.urls()[0]
LOG.info("Drag and dropped %d URLs, took first: %s",
len(mimeData.urls()), url)
# 2. Convert the URL to a local filename
filename = url.toLocalFile()
description = f"Dropped in image ({filename})"
LOG.info("Converted URL to local filename: '%s'", filename)
# 3. Set this file as input image for the toolbox.
self._toolbox.set_input_from_file(filename,
description=description)
# 4. Mark the Drop action as accepted (we actually perform
# a CopyAction, no matter what was proposed)
if e.proposedAction() == Qt.CopyAction:
e.acceptProposedAction()
else:
# If you set a drop action that is not one of the
# possible actions, the drag and drop operation will
# default to a copy operation.
e.setDropAction(Qt.CopyAction)
e.accept()
