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

#  ============================================================================
#
#  Copyright (C) 2007-2013 Conceptive Engineering bvba. All rights reserved.
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#  This file is part of the Camelot Library.
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#  WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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#  ============================================================================

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

from PyQt4.QtCore import Qt

from customdelegate import CustomDelegate
from customdelegate import DocumentationMetaclass

from camelot.core.utils import ugettext
from camelot.core.utils import variant_to_pyobject

from camelot.view.controls import editors
from camelot.view.proxy import ValueLoading

DEFAULT_COLUMN_WIDTH = 20

class PlainTextDelegate( CustomDelegate ):
    """Custom delegate for simple string values"""

    __metaclass__ = DocumentationMetaclass

    editor = editors.TextLineEditor

    def __init__( self, 
                  parent = None, 
                  length = DEFAULT_COLUMN_WIDTH,
                  translate_content=False, 
                  **kw ):
        CustomDelegate.__init__( self, parent, length = length, **kw )
        self._translate_content = translate_content
        char_width = self._font_metrics.averageCharWidth()
        self._width = char_width * min( DEFAULT_COLUMN_WIDTH, length or DEFAULT_COLUMN_WIDTH )

    def paint(self, painter, option, index):
        painter.save()
        self.drawBackground(painter, option, index)
        value = variant_to_pyobject( index.model().data( index, Qt.EditRole ) )
        
        value_str = u''
        if value not in (None, ValueLoading):
            if self._translate_content:
                value_str = ugettext( unicode(value) )
            else:
                value_str = unicode(value)

        self.paint_text(painter, option, index, value_str)
        painter.restore()