openlp/openlp/core/lib/baselistwithdnd.py

# -*- coding: utf-8 -*-
# vim: autoindent shiftwidth=4 expandtab textwidth=80 tabstop=4 softtabstop=4
"""
OpenLP - Open Source Lyrics Projection
Copyright (c) 2008-2009 Raoul Snyman
Portions copyright (c) 2008-2009 Martin Thompson, Tim Bentley

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA
"""
import types

from PyQt4 import QtCore, QtGui
from openlp.core.lib.toolbar import *
from openlp.core.lib import translate

class BaseListWithDnD(QtGui.QListView):

    def __init__(self,parent = None):
        QtGui.QListView.__init__(self,parent)
        assert (self.PluginName) # this must be set by the class which is inheriting
    def mouseMoveEvent(self, event):
        """
        Drag and drop event does not care what data is selected
        as the recipient will use events to request the data move
        just tell it what plugin to call
        """
        if event.buttons() != QtCore.Qt.LeftButton:
            return
        drag = QtGui.QDrag(self)
        mimeData = QtCore.QMimeData()
        drag.setMimeData(mimeData)
        mimeData.setText(self.PluginName)
        dropAction = drag.start(QtCore.Qt.CopyAction)
        if dropAction == QtCore.Qt.CopyAction:
            self.close()