Source code for camelot.view.controls.delegates.comboboxdelegate

#  ============================================================================
#
#  Copyright (C) 2007-2013 Conceptive Engineering bvba. All rights reserved.
#  www.conceptive.be / info@conceptive.be
#
#  This file is part of the Camelot Library.
#
#  This file may be used under the terms of the GNU General Public
#  License version 2.0 as published by the Free Software Foundation
#  and appearing in the file license.txt included in the packaging of
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#  General Public Licensing requirements will be met.
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#  visit www.python-camelot.com or contact info@conceptive.be
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#  This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
#  WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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#  ============================================================================

import logging
logger = logging.getLogger('camelot.view.controls.delegates.comboboxdelegate')

from customdelegate import CustomDelegate, DocumentationMetaclass
from PyQt4.QtCore import Qt

from camelot.view.controls import editors
from camelot.core.utils import variant_to_pyobject
from camelot.view.proxy import ValueLoading

class ComboBoxDelegate(CustomDelegate):

    __metaclass__ = DocumentationMetaclass
    
    editor = editors.ChoicesEditor

    def setEditorData(self, editor, index):
        value = variant_to_pyobject(index.data(Qt.EditRole))
        field_attributes = variant_to_pyobject(index.data(Qt.UserRole))
        editor.set_field_attributes(**field_attributes)
        editor.set_value(value)

    def paint(self, painter, option, index):
        painter.save()
        self.drawBackground(painter, option, index)
        value = variant_to_pyobject(index.data(Qt.DisplayRole))
        if value in (None, ValueLoading):
            value = ''
        self.paint_text(painter, option, index, unicode(value) )
        painter.restore()