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# (C) Copyright 2008-2023 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
# the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Thanks for using Enthought open source!
# ------------------------------------------------------------------------------
# Copyright (c) 2007, Riverbank Computing Limited
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD license.
# However, when used with the GPL version of PyQt the additional terms
# described in the PyQt GPL exception also apply
#
# Author: Riverbank Computing Limited
# ------------------------------------------------------------------------------
""" Implements a wrapper around the PyQt clipboard that handles Python objects
using pickle.
"""
from pyface.qt import QtGui
from pyface.ui.qt.mimedata import PyMimeData, str2bytes
from traits.api import HasTraits, Instance, Property
# -------------------------------------------------------------------------
# '_Clipboard' class:
# -------------------------------------------------------------------------
class _Clipboard(HasTraits):
"""The _Clipboard class provides a wrapper around the PyQt clipboard."""
# -------------------------------------------------------------------------
# Trait definitions:
# -------------------------------------------------------------------------
#: The instance on the clipboard (if any).
instance = Property()
#: Set if the clipboard contains an instance.
has_instance = Property()
#: The type of the instance on the clipboard (if any).
instance_type = Property()
#: The application clipboard.
clipboard = Instance(QtGui.QClipboard)
# -------------------------------------------------------------------------
# Instance property methods:
# -------------------------------------------------------------------------
def _get_instance(self):
"""The instance getter."""
md = PyMimeData.coerce(self.clipboard.mimeData())
if md is None:
return None
return md.instance()
def _set_instance(self, data):
"""The instance setter."""
self.clipboard.setMimeData(PyMimeData(data))
def _get_has_instance(self):
"""The has_instance getter."""
return self.clipboard.mimeData().hasFormat(PyMimeData.MIME_TYPE)
def _get_instance_type(self):
"""The instance_type getter."""
md = PyMimeData.coerce(self.clipboard.mimeData())
if md is None:
return None
return md.instanceType()
# -------------------------------------------------------------------------
# Other trait handlers:
# -------------------------------------------------------------------------
def _clipboard_default(self):
"""Initialise the clipboard."""
return QtGui.QApplication.clipboard()
# -------------------------------------------------------------------------
# The singleton clipboard instance.
# -------------------------------------------------------------------------
clipboard = _Clipboard()
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