# Source code for taurus.qt.qtgui.util.tauruscolor

    #!/usr/bin/env python

    # ###########################################################################
    #
    # This file is part of Taurus
    #
    # http://taurus-scada.org
    #
    # Copyright 2011 CELLS / ALBA Synchrotron, Bellaterra, Spain
    #
    # Taurus is free software: you can redistribute it and/or modify
    # it under the terms of the GNU Lesser General Public License as published by
    # the Free Software Foundation, either version 3 of the License, or
    # (at your option) any later version.
    #
    # Taurus 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 Lesser General Public License for more details.
    #
    # You should have received a copy of the GNU Lesser General Public License
    # along with Taurus.  If not, see <http://www.gnu.org/licenses/>.
    #
    # ###########################################################################

    """This module provides Qt color management for taurus
    """

    __docformat__ = "restructuredtext"

    from taurus.external.qt import Qt

    from taurus.core.util.colors import (
        ColorPalette,
        DEVICE_STATE_DATA,
        ATTRIBUTE_QUALITY_DATA,
    )
    from taurus.core.taurusbasetypes import AttrQuality
    from taurus.core.util.log import deprecation_decorator

    class QtColorPalette(ColorPalette):
        def __init__(self, dat, int_decoder_dict):
            ColorPalette.__init__(self, dat, int_decoder_dict)
            self._qcolor_cache_fg = dict()
            self._qcolor_cache_bg = dict()
            self._qbrush_cache_fg = dict()
            self._qbrush_cache_bg = dict()

        def qbrush(self, stoq):
            """Returns the brush for the specified state or quality"""
            name = self._decoder(stoq)

            f = self._qbrush_cache_fg
            b = self._qbrush_cache_bg
            if name not in f:
                f[name] = Qt.QBrush(self.qcolor(stoq)[1])

            if name not in b:
                b[name] = Qt.QBrush(self.qcolor(stoq)[0])
                if name == "None":
                    b[name].setStyle(Qt.Qt.BDiagPattern)

            return (b[name], f[name])

        def qcolor(self, stoq):
            """Returns the color for the specified state or quality"""
            name = self._decoder(stoq)

            f = self._qcolor_cache_fg
            b = self._qcolor_cache_bg
            if name not in f:
                f[name] = Qt.QColor(self.number(name, True))

            if name not in b:
                b[name] = Qt.QColor(self.number(name))

            return (b[name], f[name])

        @deprecation_decorator(alt="QtColorPalette.qcolor()", rel="4.5")
        def qvariant(self, stoq):
            """Returns the color for the specified state or quality"""
            return self.qcolor(stoq)

    QT_ATTRIBUTE_QUALITY_PALETTE = QtColorPalette(
        ATTRIBUTE_QUALITY_DATA, AttrQuality
    )

    try:
        # TODO: Tango-centric
        from taurus.core.tango import DevState

        QT_DEVICE_STATE_PALETTE = QtColorPalette(DEVICE_STATE_DATA, DevState)
    except ImportError:
        QT_DEVICE_STATE_PALETTE = QtColorPalette(DEVICE_STATE_DATA, {})