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# Source code for camelot.view.controls.filterlist

    #  ============================================================================
    #
    #  Copyright (C) 2007-2011 Conceptive Engineering bvba. All rights reserved.
    #  www.conceptive.be / project-camelot@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
    #  this file.  Please review this information to ensure GNU
    #  General Public Licensing requirements will be met.
    #
    #  If you are unsure which license is appropriate for your use, please
    #  visit www.python-camelot.com or contact project-camelot@conceptive.be
    #
    #  This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    #  WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    #
    #  For use of this library in commercial applications, please contact
    #  project-camelot@conceptive.be
    #
    #  ============================================================================

    """Controls to filter data"""

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

    from PyQt4 import QtGui, QtCore

    class FilterList( QtGui.QWidget ):
        """A list with filters that can be applied on a query in the tableview"""

        filters_changed_signal = QtCore.pyqtSignal()

        def __init__(self, items, parent):
            """
        :param items: list of tuples (filter, (name, choices)) for constructing the different filterboxes
        """
            super(FilterList, self).__init__(parent)
            #self.setFrameStyle(QtGui.QFrame.NoFrame)
            layout = QtGui.QVBoxLayout()
            layout.setMargin( 2 )
            layout.setSpacing( 4 )
            for filter, (name, options) in items:
                filter_widget = filter.render(self, name, options)
                layout.addWidget(filter_widget)
                filter_widget.filter_changed_signal.connect( self.emit_filters_changed )
            layout.addStretch()
            self.setLayout(layout)
            if len(items) == 0:
                self.setMaximumWidth(0)
            else:
                self.setSizePolicy( QtGui.QSizePolicy.MinimumExpanding,
                                    QtGui.QSizePolicy.Expanding )

        def decorate_query(self, query):
            for i in range(self.layout().count()):
                if self.layout().itemAt(i).widget():
                    query = self.layout().itemAt(i).widget().decorate_query(query)
            return query

        @QtCore.pyqtSlot()
        def emit_filters_changed(self):
            logger.debug('filters changed')
            self.filters_changed_signal.emit()

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