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# Source code for camelot.view.controls.delegates.intervalsdelegate

    #  ============================================================================
    #
    #  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
    #
    #  ============================================================================
    from PyQt4 import QtGui
    from PyQt4.QtCore import Qt

    from customdelegate import DocumentationMetaclass, CustomDelegate
    from camelot.core.utils import variant_to_pyobject
    from camelot.view.proxy import ValueLoading

    class IntervalsDelegate(CustomDelegate):
        """Custom delegate for visualizing camelot.container.IntervalsContainer
      data:
      """

        __metaclass__ = DocumentationMetaclass

        def paint(self, painter, option, index):
            painter.save()
            self.drawBackground(painter, option, index)
            intervals_container = variant_to_pyobject(index.model().data(index, Qt.EditRole))
            field_attributes = variant_to_pyobject(index.data(Qt.UserRole))
            # background_color = QtGui.QColor(index.model().data(index, Qt.BackgroundRole))
            # editable is defaulted to False, because there is no editor, no need for one currently
            editable, color, background_color = False, None, None

            if field_attributes != ValueLoading:
                editable = field_attributes.get( 'editable', False )
                background_color = field_attributes.get( 'background_color', QtGui.QColor(index.model().data(index, Qt.BackgroundRole)) )
                color = field_attributes.get('color', None)

            if( option.state & QtGui.QStyle.State_Selected ):
                painter.fillRect(option.rect, option.palette.highlight())
            else:
                if not editable:
                    painter.fillRect(option.rect, option.palette.window())
                else:
                    painter.fillRect(option.rect, background_color)

            if intervals_container and intervals_container!=ValueLoading:
                rect = option.rect
                xscale = float(rect.width()-4)/(intervals_container.max - intervals_container.min)
                xoffset = intervals_container.min * xscale + rect.x()
                yoffset = rect.y() + rect.height()/2
                for interval in intervals_container.intervals:
                    pen = QtGui.QPen(interval.color or color)
                    pen.setWidth(3)
                    painter.setPen(pen)
                    xscale_interval = xscale
                    x1, x2 =  xoffset + interval.begin *xscale_interval, xoffset + interval.end*xscale_interval
                    painter.drawLine(x1, yoffset, x2, yoffset)
                    painter.drawEllipse(x1-1, yoffset-1, 2, 2)
                    painter.drawEllipse(x2-1, yoffset-1, 2, 2)
                    pen = QtGui.QPen(Qt.white)

            painter.restore()

        def createEditor(self, parent, option, index):
            pass

        def setEditorData(self, editor, index):
            pass

        def setModelData(self, editor, model, index):
            pass

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