# Source code for openpyxl.chartsheet.relation

    # Copyright (c) 2010-2024 openpyxl

    from openpyxl.descriptors import (
        Integer,
        Alias
    )
    from openpyxl.descriptors.excel import Relation
    from openpyxl.descriptors.serialisable import Serialisable

    class SheetBackgroundPicture(Serialisable):
        tagname = "picture"
        id = Relation()

        def __init__(self, id):
            self.id = id

    class DrawingHF(Serialisable):
        id = Relation()
        lho = Integer(allow_none=True)
        leftHeaderOddPages = Alias('lho')
        lhe = Integer(allow_none=True)
        leftHeaderEvenPages = Alias('lhe')
        lhf = Integer(allow_none=True)
        leftHeaderFirstPage = Alias('lhf')
        cho = Integer(allow_none=True)
        centerHeaderOddPages = Alias('cho')
        che = Integer(allow_none=True)
        centerHeaderEvenPages = Alias('che')
        chf = Integer(allow_none=True)
        centerHeaderFirstPage = Alias('chf')
        rho = Integer(allow_none=True)
        rightHeaderOddPages = Alias('rho')
        rhe = Integer(allow_none=True)
        rightHeaderEvenPages = Alias('rhe')
        rhf = Integer(allow_none=True)
        rightHeaderFirstPage = Alias('rhf')
        lfo = Integer(allow_none=True)
        leftFooterOddPages = Alias('lfo')
        lfe = Integer(allow_none=True)
        leftFooterEvenPages = Alias('lfe')
        lff = Integer(allow_none=True)
        leftFooterFirstPage = Alias('lff')
        cfo = Integer(allow_none=True)
        centerFooterOddPages = Alias('cfo')
        cfe = Integer(allow_none=True)
        centerFooterEvenPages = Alias('cfe')
        cff = Integer(allow_none=True)
        centerFooterFirstPage = Alias('cff')
        rfo = Integer(allow_none=True)
        rightFooterOddPages = Alias('rfo')
        rfe = Integer(allow_none=True)
        rightFooterEvenPages = Alias('rfe')
        rff = Integer(allow_none=True)
        rightFooterFirstPage = Alias('rff')

        def __init__(self,
                     id=None,
                     lho=None,
                     lhe=None,
                     lhf=None,
                     cho=None,
                     che=None,
                     chf=None,
                     rho=None,
                     rhe=None,
                     rhf=None,
                     lfo=None,
                     lfe=None,
                     lff=None,
                     cfo=None,
                     cfe=None,
                     cff=None,
                     rfo=None,
                     rfe=None,
                     rff=None,
                     ):
            self.id = id
            self.lho = lho
            self.lhe = lhe
            self.lhf = lhf
            self.cho = cho
            self.che = che
            self.chf = chf
            self.rho = rho
            self.rhe = rhe
            self.rhf = rhf
            self.lfo = lfo
            self.lfe = lfe
            self.lff = lff
            self.cfo = cfo
            self.cfe = cfe
            self.cff = cff
            self.rfo = rfo
            self.rfe = rfe
            self.rff = rff