gramps/gramps2/src/plugins/StatisticsChart.py

#
# Gramps - a GTK+/GNOME based genealogy program
#
# Copyright (C) 2003-2005  Donald N. Allingham
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# Statistics plugin (w) 2004-2005 by Eero Tamminen with lots of help
# from Alex Roitman.
#
# To see things still missing, search for "TODO"...
#
# $Id$

"""
Statistics Chart report
"""

#------------------------------------------------------------------------
#
# python modules
#
#------------------------------------------------------------------------
import time
from gettext import gettext as _

#------------------------------------------------------------------------
#
# GNOME/gtk
#
#------------------------------------------------------------------------
import gtk

#------------------------------------------------------------------------
#
# GRAMPS modules
#
#------------------------------------------------------------------------

# Person and relation types
from RelLib import Person, Family
# gender and report type names
import BaseDoc
import Report
import ReportUtils
import ReportOptions
import GenericFilter
import DateHandler
from Utils import ProgressMeter
from TransUtils import strip_context as __

#------------------------------------------------------------------------
#
# Global options and their names
#
#------------------------------------------------------------------------

class _options:
    # sort type identifiers
    SORT_VALUE = 0
    SORT_KEY = 1

    sorts = [
        (SORT_VALUE, "Item count", _("Item count")),
        (SORT_KEY, "Item name", _("Item name"))
    ]
    genders = [
        (Person.UNKNOWN, "Both", _("Both")),
        (Person.MALE, "Men", _("Men")),
        (Person.FEMALE, "Women", _("Women"))
    ]


#------------------------------------------------------------------------
#
# Data extraction methods from the database
#
#------------------------------------------------------------------------
class Extract:

    def __init__(self):
        """Methods for extracting statistical data from the database"""
        # key, non-localized name, localized name, type method, data method
        self.extractors = {
            'data_title':  ("Title", __("person|Title"),
                            self.get_person, self.get_title),
            'data_sname':  ("Surname", _("Surname"),
                            self.get_person, self.get_surname),
            'data_fname':  ("Forename", _("Forename"),
                            self.get_person, self.get_forename),
            'data_gender': ("Gender", _("Gender"),
                            self.get_person, self.get_gender),
            'data_byear':  ("Birth year", _("Birth year"),
                             self.get_birth, self.get_year),
            'data_dyear':  ("Death year", _("Death year"),
                             self.get_death, self.get_year),
            'data_bmonth': ("Birth month", _("Birth month"),
                            self.get_birth, self.get_month),
            'data_dmonth': ("Death month", _("Death month"),
                            self.get_death, self.get_month),
            'data_dcause': ("Cause of death", _("Cause of death"),
                             self.get_death, self.get_cause),
            'data_bplace': ("Birth place", _("Birth place"),
                            self.get_birth, self.get_place),
            'data_dplace': ("Death place", _("Death place"),
                             self.get_death, self.get_place),
            'data_mplace': ("Marriage place", _("Marriage place"),
                             self.get_marriage_handles, self.get_places),
            'data_mcount': ("Number of relationships", _("Number of relationships"),
                             self.get_family_handles, self.get_handle_count),
            'data_fchild': ("Age when first child born", _("Age when first child born"),
                             self.get_child_handles, self.get_first_child_age),
            'data_lchild': ("Age when last child born", _("Age when last child born"),
                             self.get_child_handles, self.get_last_child_age),
            'data_ccount': ("Number of children", _("Number of children"),
                             self.get_child_handles, self.get_handle_count),
            'data_mage':   ("Age at marriage", _("Age at marriage"),
                             self.get_marriage_handles, self.get_event_ages),
            'data_dage':   ("Age at death", _("Age at death"),
                             self.get_person, self.get_death_age),
            'data_age':    ("Age", _("Age"),
                             self.get_person, self.get_person_age),
            'data_etypes': ("Event type", _("Event type"),
                             self.get_event_handles, self.get_event_type)
        }

    # ----------------- data extraction methods --------------------
    # take an object and return a list of strings

    def get_title(self, person):
        "return title for given person"
        # TODO: return all titles, not just primary ones...
        title = person.get_primary_name().get_title()
        if title:
            return [title]
        else:
            return [_("(Preferred) title missing")]
    
    def get_forename(self, person):
        "return forenames for given person"
        # TODO: return all forenames, not just primary ones...
        firstnames = person.get_primary_name().get_first_name().strip()
        if firstnames:
            return [name.capitalize() for name in firstnames.split()]
        else:
            return [_("(Preferred) forename missing")]
        
    def get_surname(self, person):
        "return surnames for given person"
        # TODO: return all surnames, not just primary ones...
        surnames = person.get_primary_name().get_surname().strip()
        if surnames:
            return [name.capitalize() for name in surnames.split()]
        else:
            return [_("(Preferred) surname missing")]
        
    def get_gender(self, person):
        "return gender for given person"
        # TODO: why there's no Person.getGenderName?
        # It could be used by getDisplayInfo & this...
        if person.gender == Person.MALE:
            return [_("Men")]
        if person.gender == Person.FEMALE:
            return [_("Women")]
        return [_("Gender unknown")]

    def get_year(self, event):
        "return year for given event"
        date = event.get_date_object()
        if date:
            year = date.get_year()
            if year:
                return [str(year)]
        return [_("Date(s) missing")]
        
    def get_month(self, event):
        "return month for given event"
        date = event.get_date_object()
        if date:
            month = date.get_month()
            if month:
                return [DateHandler.displayer._months[month]]
        return [_("Date(s) missing")]

    def get_cause(self, event):
        "return cause for given event"
        cause = event.get_cause()
        if cause:
            return [cause]
        return [_("Cause missing")]

    def get_place(self, event):
        "return place for given event"
        place_handle = event.get_place_handle()
        if place_handle:
            place = self.db.get_place_from_handle(place_handle).get_title()
            if place:
                return [place]
        return [_("Place missing")]

    def get_places(self, data):
        "return places for given (person,event_handles)"
        places = []
        person, event_handles = data
        for event_handle in event_handles:
            event = self.db.get_event_from_handle(event_handle)
            place_handle = event.get_place_handle()
            if place_handle:
                place = self.db.get_place_from_handle(place_handle).get_title()
                if place:
                   places.append(place)
            else:
                places.append(_("Place missing"))
        return places
    
    def get_person_age(self, person):
        "return age for given person, if alive"
        death_handle = person.get_death_handle()
        if not death_handle:
            return [self.estimate_age(person)]
        return [_("Already dead")]

    def get_death_age(self, person):
        "return age at death for given person, if dead"
        death_handle = person.get_death_handle()
        if death_handle:
            return [self.estimate_age(person, death_handle)]
        return [_("Still alive")]

    def get_event_ages(self, data):
        "return ages at given (person,event_handles)"
        ages = []
        person, event_handles = data
        for event_handle in event_handles:
            ages.append(self.estimate_age(person, event_handle))
        if ages:
            return ages
        return [_("Events missing")]

    def get_event_type(self, data):
        "return event types at given (person,event_handles)"
        types = []
        person, event_handles = data
        for event_handle in event_handles:
            event = self.db.get_event_from_handle(event_handle)
            types.append(event.get_name())
        if types:
            return types
        return [_("Events missing")]

    def get_first_child_age(self, data):
        "return age when first child in given (person,child_handles) was born"
        ages, errors = self.get_sorted_child_ages(data)
        if ages:
            errors.append(ages[0])
            return errors
        return [_("Children missing")]

    def get_last_child_age(self, data):
        "return age when last child in given (person,child_handles) was born"
        ages, errors = self.get_sorted_child_ages(data)
        if ages:
            errors.append(ages[-1])
            return errors
        return [_("Children missing")]

    def get_handle_count(self, data):
        "return number of handles in given (person,handle_list) used for child count, family count"
        return [str(len(data[1]))]

    # ------------------- utility methods -------------------------
    
    def get_sorted_child_ages(self, data):
        "return (sorted_ages,errors) for given (person,child_handles)"
        ages = []
        errors = []
        person, child_handles = data
        for child_handle in child_handles:
            child = self.db.get_person_from_handle(child_handle)
            birth_handle = child.get_birth_handle()
            if birth_handle:
                ages.append(self.estimate_age(person, birth_handle))
            else:
                errors.append(_("Birth missing"))
                continue
        ages.sort()
        return (ages, errors)

    def estimate_age(self, person, end=None, begin=None):
        """return estimated age (range) for given person or error message.
           age string is padded with spaces so that it can be sorted"""
        age = ReportUtils.estimate_age(self.db, person, end, begin)
        if age[0] < 0 or age[1] < 0:
            # inadequate information
            return _("Date(s) missing")
        if age[0] == age[1]:
            # exact year
            return "%3d" % age[0]
        else:
            # minimum and maximum
            return "%3d-%d" % (age[0], age[1])

    # ------------------- type methods -------------------------
    # take db and person and return suitable gramps object(s)

    def get_person(self, person):
        "return person"
        return person

    def get_birth(self, person):
        "return birth event for given person or None"
        birth_handle = person.get_birth_handle()
        if birth_handle:
            return self.db.get_event_from_handle(birth_handle)
        return None
    
    def get_death(self, person):
        "return death event for given person or None"
        death_handle = person.get_death_handle()
        if death_handle:
            return self.db.get_event_from_handle(death_handle)
        return None
    
    def get_child_handles(self, person):
        "return list of child handles for given person or None"
        children = []
        for fam_handle in person.get_family_handle_list():
            fam = self.db.get_family_from_handle(fam_handle)
            for child_handle in fam.get_child_handle_list():
                children.append(child_handle)
        # TODO: it would be good to return only biological children,
        # but GRAMPS doesn't offer any efficient way to check that
        # (I don't want to check each children's parent family mother
        # and father relations as that would make this *much* slower)
        if children:
            return (person, children)
        return None

    def get_marriage_handles(self, person):
        "return list of marriage event handles for given person or None"
        marriages = []
        for family_handle in person.get_family_handle_list():
            family = self.db.get_family_from_handle(family_handle)
            if family.get_relationship() == Family.MARRIED:
                for event_handle in family.get_event_list():
                    if event_handle:
                        event = self.db.get_event_from_handle(event_handle)
                        if event.get_name() == "Marriage":
                            marriages.append(event_handle)
        if marriages:
            return (person, marriages)
        return None

    def get_family_handles(self, person):
        "return list of family handles for given person or None"
        families = person.get_family_handle_list()

        if families:
            return (person, families)
        return None

    def get_event_handles(self, person):
        "return list of event handles for given person or None"
        events = person.get_event_list()

        if events:
            return (person, events)
        return None

    # ----------------- data collection methods --------------------

    def get_person_data(self, person, collect):
        """Adds data from the database to 'collect' for the given person,
           using methods rom the 'collect' data dict tuple
        """
        for chart in collect:
            # get the information
            type_func = chart[2]
            data_func = chart[3]
            obj = type_func(person)        # e.g. get_date()
            if obj:
                value = data_func(obj)        # e.g. get_year()
            else:
                value = [_("Personal information missing")]
            # list of information found
            for key in value:
                if key in chart[1].keys():
                    chart[1][key] += 1
                else:
                    chart[1][key] = 1

    
    def collect_data(self, db, filter_func, options, genders,
                     year_from, year_to, no_years):
        """goes through the database and collects the selected personal
        data persons fitting the filter and birth year criteria. The
        arguments are:
        db          - the GRAMPS database
        filter_func - filtering function selected by the StatisticsDialog
        options     - report options_dict which sets which methods are used
        genders     - which gender(s) to include into statistics
        year_from   - use only persons who've born this year of after
        year_to     - use only persons who've born this year or before
        no_years    - use also people without known birth year
        
        Returns an array of tuple of:
        - Extraction method title
        - Dict of values with their counts
        (- Method)
        """
        self.db = db        # store for use by methods

        data = []
        ext = self.extractors
        # which methods to use
        for key in options:
            if options[key] and key in self.extractors:
                # localized data title, value dict, type and data method
                data.append((ext[key][1], {}, ext[key][2], ext[key][3]))
        
        # go through the people and collect data
        for person_handle in filter_func.apply(db, db.get_person_handles(sort_handles=False)):

            person = db.get_person_from_handle(person_handle)
            # check whether person has suitable gender
            if person.gender != genders and genders != Person.UNKNOWN:
                continue
        
            # check whether birth year is within required range
            birth = self.get_birth(person)
            if birth:
                birthdate = birth.get_date_object()
                if birthdate.get_year_valid():
                    year = birthdate.get_year()
                    if not (year >= year_from and year <= year_to):
                        continue
                else:
                    # if death before range, person's out of range too...
                    death = self.get_death(person)
                    if death:
                        deathdate = death.get_date_object()
                        if deathdate.get_year_valid() and deathdate.get_year() < year_from:
                            continue
                        if not no_years:
                            # do not accept people who are not known to be in range
                            continue

            self.get_person_data(person, data)
        return data

# GLOBAL: required so that we get access to _Extract.extractors[]
# Unfortunately class variables cannot reference instance methods :-/
_Extract = Extract()

#------------------------------------------------------------------------
#
# Statistics report
#
#------------------------------------------------------------------------
class StatisticsChart(Report.Report):

    def __init__(self, database, person, options_class):
        """
        Creates the Statistics object that produces the report.
        Uses the Extractor class to extract the data from the database.

        The arguments are:

        database        - the GRAMPS database instance
        person          - currently selected person
        options_class   - instance of the Options class for this report

        To see what the options are, check the options help in the options class.
        """
        Report.Report.__init__(self,database,person,options_class)
    
        filter_num = options_class.get_filter_number()
        filters = options_class.get_report_filters(person)
        filters.extend(GenericFilter.CustomFilters.get_filters())
        filterfun = filters[filter_num]

        options = options_class.handler.options_dict
        self.bar_items = options['bar_items']
        year_from = options['year_from']
        year_to = options['year_to']
        gender = options['gender']

        # title needs both data extraction method name + gender name
        if gender == Person.MALE:
            genders = _("Men")
        elif gender == Person.FEMALE:
            genders = _("Women")
        else:
            genders = None

        # needed for keyword based localization
        mapping = {
            'genders': genders,
            'year_from': year_from,
            'year_to': year_to
        }
	self.progress = ProgressMeter(_('Statistics Charts'))

        # extract requested items from the database and count them
	self.progress.set_pass(_('Collecting data...'), 1)
        tables = _Extract.collect_data(database, filterfun, options,
                        gender, year_from, year_to, options['no_years'])
	self.progress.step()

	self.progress.set_pass(_('Sorting data...'), len(tables))
        self.data = []
        sortby = options['sortby']
        reverse = options['reverse']
        for table in tables:
            # generate sorted item lookup index index
            lookup = self.index_items(table[1], sortby, reverse)
            # document heading
            mapping['chart_title'] = table[0]
            if genders:
                heading = _("%(genders)s born %(year_from)04d-%(year_to)04d: %(chart_title)s") % mapping
            else:
                heading = _("Persons born %(year_from)04d-%(year_to)04d: %(chart_title)s") % mapping
            self.data.append((heading, table[0], table[1], lookup))
	    self.progress.step()
	#DEBUG
        #print heading
        #print table[1]


    def lookup_compare(self, a, b):
        "compare given keys according to corresponding lookup values"
        return cmp(self.lookup_items[a], self.lookup_items[b])

    def index_items(self, data, sort, reverse):
        """creates & stores a sorted index for the items"""

        # sort by item keys
        index = data.keys()
        index.sort()
        if reverse:
            index.reverse()

        if sort == _options.SORT_VALUE:
            # set for the sorting function
            self.lookup_items = data
        
            # then sort by value
            index.sort(self.lookup_compare)
            if reverse:
                index.reverse()

        return index

    
    def define_graphics_styles(self):
        """
        Define the graphics styles used by the report. Paragraph definitions
        have already been defined in the document. The styles used are:

        SC-title - Contains the SC-Title paragraph style used for
                the title of the document
        SC-text  - Contains the SC-Name paragraph style used for
                the individual's name
        SC-color-N - The colors for drawing pies.
        SC-bar - A red bar with 0.5pt black line.
        """
        g = BaseDoc.GraphicsStyle()
        g.set_paragraph_style("SC-Title")
        g.set_color((0,0,0))
        g.set_fill_color((255,255,255))
        g.set_line_width(0)
        g.set_width(self.doc.get_usable_width())
        self.doc.add_draw_style("SC-title",g)

        g = BaseDoc.GraphicsStyle()
        g.set_paragraph_style("SC-Text")
        g.set_color((0,0,0))
        g.set_fill_color((255,255,255))
        g.set_line_width(0)
        self.doc.add_draw_style("SC-text",g)

        width = 0.8
        self.colors = 7
        # red
        g = BaseDoc.GraphicsStyle()
        g.set_paragraph_style('SC-Text')
        g.set_color((0,0,0))
        g.set_fill_color((255,0,0))
        g.set_line_width(width)
        self.doc.add_draw_style("SC-color-0",g)
        # orange
        g = BaseDoc.GraphicsStyle()
        g.set_paragraph_style('SC-Text')
        g.set_color((0,0,0))
        g.set_fill_color((255,158,33))
        g.set_line_width(width)
        self.doc.add_draw_style("SC-color-1",g)
        # green
        g = BaseDoc.GraphicsStyle()
        g.set_paragraph_style('SC-Text')
        g.set_color((0,0,0))
        g.set_fill_color((0,178,0))
        g.set_line_width(width)
        self.doc.add_draw_style("SC-color-2",g)
        # violet
        g = BaseDoc.GraphicsStyle()
        g.set_paragraph_style('SC-Text')
        g.set_color((0,0,0))
        g.set_fill_color((123,0,123))
        g.set_line_width(width)
        self.doc.add_draw_style("SC-color-3",g)
        # yellow
        g = BaseDoc.GraphicsStyle()
        g.set_paragraph_style('SC-Text')
        g.set_color((0,0,0))
        g.set_fill_color((255,255,0))
        g.set_line_width(width)
        self.doc.add_draw_style("SC-color-4",g)
        # blue
        g = BaseDoc.GraphicsStyle()
        g.set_paragraph_style('SC-Text')
        g.set_color((0,0,0))
        g.set_fill_color((0,105,214))
        g.set_line_width(width)
        self.doc.add_draw_style("SC-color-5",g)
        # gray
        g = BaseDoc.GraphicsStyle()
        g.set_paragraph_style('SC-Text')
        g.set_color((0,0,0))
        g.set_fill_color((210,204,210))
        g.set_line_width(width)
        self.doc.add_draw_style("SC-color-6",g)

        g = BaseDoc.GraphicsStyle()
        g.set_color((0,0,0))
        g.set_fill_color((255,0,0))
        g.set_line_width(width)
        self.doc.add_draw_style("SC-bar",g)


    def write_report(self):
        "output the selected statistics..."

	self.progress.set_pass(_('Saving charts...'), len(self.data))
        for data in self.data:
            self.doc.start_page()
            if len(data[2]) < self.bar_items:
                self.output_piechart(data[0], data[1], data[2], data[3])
            else:
                self.output_barchart(data[0], data[1], data[2], data[3])
            self.doc.end_page()
	    self.progress.step()
	self.progress.close()


    def output_piechart(self, title, typename, data, lookup):

        # set layout variables
        middle = self.doc.get_usable_width() / 2
        
        # start output
        self.doc.center_text('SC-title', title, middle, 0)
        yoffset = ReportUtils.pt2cm(self.doc.style_list['SC-Title'].get_font().get_size())
        
        # collect data for output
        color = 0
        chart_data = []
        for key in lookup:
            style = "SC-color-%d" % color
	    text = "%s (%d)" % (key, data[key])
            # graphics style, value, and it's label
            chart_data.append((style, data[key], text))
            color = (color+1) % self.colors
        
	margin = 1.0
	legendx = 2.0
	
        # output data...
        radius = middle - 2*margin
        yoffset = yoffset + margin + radius
        ReportUtils.draw_pie_chart(self.doc, middle, yoffset, radius, chart_data, -90)
        yoffset = yoffset + radius + margin
	
	text = _("%s (persons):") % typename
	ReportUtils.draw_legend(self.doc, legendx, yoffset, chart_data, text)


    def output_barchart(self, title, typename, data, lookup):

        pt2cm = ReportUtils.pt2cm
        font = self.doc.style_list['SC-Text'].get_font()

        # set layout variables
        width = self.doc.get_usable_width()
        row_h = pt2cm(font.get_size())
        max_y = self.doc.get_usable_height() - row_h
        pad =  row_h * 0.5
        
        # check maximum value
        max_value = 0
        for key in lookup:
            max_value = max(data[key], max_value)
        # horizontal area for the gfx bars
	margin = 1.0
	middle = width/2.0
	textx = middle + margin/2.0
	stopx = middle - margin/2.0
        maxsize = stopx - margin

        # start output
        self.doc.center_text('SC-title', title, middle, 0)
        yoffset = pt2cm(self.doc.style_list['SC-Title'].get_font().get_size())
        #print title

	# header
	yoffset += (row_h + pad)
	text = _("%s (persons):") % typename
	self.doc.draw_text('SC-text', text, textx, yoffset)

        for key in lookup:
            yoffset += (row_h + pad)
            if yoffset > max_y:
            # for graphical report, page_break() doesn't seem to work
                self.doc.end_page()
                self.doc.start_page()
                yoffset = 0

            # right align bar to the text
            value = data[key]
            startx = stopx - (maxsize * value / max_value)
            path = ((startx, yoffset),
                    (stopx, yoffset),
                    (stopx, yoffset + row_h),
                    (startx, yoffset + row_h))
            self.doc.draw_path('SC-bar', path)
	    # text after bar
	    text = "%s (%d)" % (key, data[key])
            self.doc.draw_text('SC-text', text, textx, yoffset)
            #print key + ":",
        
        return

#------------------------------------------------------------------------
#
# Statistics report options
#
#------------------------------------------------------------------------
class StatisticsChartOptions(ReportOptions.ReportOptions):
    """
    Defines options and provides their handling interface.
    """
    def __init__(self,name, person_id=None):
        ReportOptions.ReportOptions.__init__(self, name, person_id)

    def set_new_options(self):
    # Options specific for this report
        self.options_dict = {
            'gender'    : Person.UNKNOWN,
            'sortby'    : _options.SORT_VALUE,
            'reverse'   : 0,
            'year_from' : 1700,
            'year_to'   : time.localtime()[0],
            'no_years'  : 0,
            'bar_items' : 8
        }
        for key in _Extract.extractors:
            self.options_dict[key] = 0
        self.options_dict['data_gender'] = 1

        self.options_help = {
            'gender'    : ("=num", "Genders included",
                               ["%d\t%s" % (item[0], item[1]) for item in _options.genders],
                               False),
            'sortby'    : ("=num", "Sort chart items by",
                                ["%d\t%s" % (item[0], item[1]) for item in _options.sorts],
                                False),
            'reverse'   : ("=0/1", "Whether to sort in reverse order",
                                ["Do not sort in reverse", "Sort in reverse"],
                                True),
            'year_from' : ("=num", "Birth year from which to include people",
                                "Earlier than 'year_to' value"),
            'year_to'   : ("=num", "Birth year until which to include people",
                                "Smaller than %d" % self.options_dict['year_to']),
            'no_years'  : ("=0/1", "Whether to include people without known birth years",
                                ["Do not include", "Include"], True),
            'bar_items' : ("=num", "Use barchart instead of piechart with this many or more items",
                                "Number of items with which piecharts still look good...")
        }
        for key in _Extract.extractors:
            self.options_help[key] = ("=0/1", _Extract.extractors[key][0],
                                ["Leave chart with this data out", "Include chart with this data"],
                                True)

                                
    def enable_options(self):
        # Semi-common options that should be enabled for this report
        self.enable_dict = {
            'filter'    : 0,
        }
    
        
    def make_default_style(self, default_style):
        """Make the default output style for the Statistics report."""
        f = BaseDoc.FontStyle()
        f.set_size(10)
        f.set_type_face(BaseDoc.FONT_SERIF)
        p = BaseDoc.ParagraphStyle()
        p.set_font(f)
        p.set_alignment(BaseDoc.PARA_ALIGN_RIGHT)
        p.set_description(_("The style used for the items and values."))
        default_style.add_style("SC-Text",p)

        f = BaseDoc.FontStyle()
        f.set_size(14)
        f.set_type_face(BaseDoc.FONT_SANS_SERIF)
        p = BaseDoc.ParagraphStyle()
        p.set_font(f)
        p.set_alignment(BaseDoc.PARA_ALIGN_CENTER)
        p.set_description(_("The style used for the title of the page."))
        default_style.add_style("SC-Title",p)

        
    def get_report_filters(self, person):
        """Set up the list of possible content filters."""
    
        if person:
            name = person.get_primary_name().get_name()
            gramps_id = person.get_gramps_id()
        else:
            name = 'PERSON'
            gramps_id = ''
    
        all = GenericFilter.GenericFilter()
        all.set_name(_("Entire Database"))
        all.add_rule(GenericFilter.Everyone([]))

        des = GenericFilter.GenericFilter()
        des.set_name(_("Descendants of %s") % name)
        des.add_rule(GenericFilter.IsDescendantOf([gramps_id, 1]))

        ans = GenericFilter.GenericFilter()
        ans.set_name(_("Ancestors of %s") % name)
        ans.add_rule(GenericFilter.IsAncestorOf([gramps_id, 1]))

        com = GenericFilter.GenericFilter()
        com.set_name(_("People with common ancestor with %s") % name)
        com.add_rule(GenericFilter.HasCommonAncestorWith([gramps_id]))

        return [all, des, ans, com]

    
    def add_user_options(self, dialog):
        """
        Override the base class add_user_options task to add
        report specific options
        """
        # how to sort the data
        self.sort_menu = gtk.combo_box_new_text()
        for item_idx in range(len(_options.sorts)):
            item = _options.sorts[item_idx]
            self.sort_menu.append_text(item[2])
            if item[0] == self.options_dict['sortby']:
                self.sort_menu.set_active(item_idx)
        tip = _("Select how the statistical data is sorted.")
        dialog.add_option(_("Sort chart items by"), self.sort_menu, tip)

        # sorting order
        tip = _("Check to reverse the sorting order.")
        self.reverse = gtk.CheckButton(_("Sort in reverse order"))
        self.reverse.set_active(self.options_dict['reverse'])
        dialog.add_option(None, self.reverse, tip)
        self.reverse.show()

        # year range
	from_adj = gtk.Adjustment(value=self.options_dict['year_from'],
				  lower=1, upper=time.localtime()[0],
				  step_incr=1, page_incr=100)
        self.from_box = gtk.SpinButton(adjustment=from_adj, digits=0)
	to_adj = gtk.Adjustment(value=self.options_dict['year_to'],
				lower=1, upper=time.localtime()[0],
				step_incr=1, page_incr=100)
        self.to_box = gtk.SpinButton(adjustment=to_adj, digits=0)

        box = gtk.HBox()
        box.add(self.from_box)
        box.add(gtk.Label("-"))
        box.add(self.to_box)
        tip = _("Select year range within which people need to be born to be selected for statistics.")
        dialog.add_option(_('People born between'), box, tip)
        box.show_all()

        # include people without known birth year?
        tip = _("Check this if you want people who have no known birth date or year to be accounted also in the statistics.")
        self.no_years = gtk.CheckButton(_("Include people without known birth years"))
        self.no_years.set_active(self.options_dict['no_years'])
        dialog.add_option(None, self.no_years, tip)
        self.no_years.show()

        # gender selection
        self.gender_menu = gtk.combo_box_new_text()
        for item_idx in range(len(_options.genders)):
            item = _options.genders[item_idx]
            self.gender_menu.append_text(item[2])
            if item[0] == self.options_dict['gender']:
                self.gender_menu.set_active(item_idx)
        tip = _("Select which genders are included into statistics.")
        dialog.add_option(_("Genders included"), self.gender_menu, tip)

        # max. pie item selection
        tip = _("With fewer items pie chart and legend will be used instead of a bar chart.")
	pie_adj = gtk.Adjustment(value=self.options_dict['bar_items'],
				 lower=0, upper=20, step_incr=1)
        self.bar_items = gtk.SpinButton(adjustment=pie_adj, digits=0)
        dialog.add_option(_("Max. items for a pie"), self.bar_items, tip)

        # -------------------------------------------------
        # List of available charts on a separate option tab
        idx = 0
        half = (len(_Extract.extractors)+1)/2
        hbox = gtk.HBox()
        vbox = gtk.VBox()
        self.charts = {}
        for key in _Extract.extractors:
            check = gtk.CheckButton(_Extract.extractors[key][1])
            check.set_active(self.options_dict[key])
            self.charts[key] = check
            vbox.add(check)
            idx += 1
            if idx == half:
                hbox.add(vbox)
                vbox = gtk.VBox()
        hbox.add(vbox)
        tip = _("Mark checkboxes to add charts with indicated data")
        dialog.add_frame_option(_("Charts"), "", hbox, tip)
        hbox.show_all()

        # Note about children
        label = gtk.Label(_("Note that both biological and adopted children are taken into account."))
        dialog.add_frame_option(_("Charts"), "", label)

        
    def parse_user_options(self, dialog):
        """
        Parses the custom options that we have added.
        """
        self.options_dict['sortby'] = _options.sorts[self.sort_menu.get_active()][0]
        self.options_dict['reverse'] = int(self.reverse.get_active())
        self.options_dict['year_to'] = int(self.to_box.get_value_as_int())
        self.options_dict['year_from'] = int(self.from_box.get_value_as_int())
        self.options_dict['no_years'] = int(self.no_years.get_active())
        self.options_dict['gender'] = _options.genders[self.gender_menu.get_active()][0]
        self.options_dict['bar_items'] = int(self.bar_items.get_value_as_int())
        for key in _Extract.extractors:
            self.options_dict[key] = int(self.charts[key].get_active())

#------------------------------------------------------------------------
#
# Register report/options
#
#------------------------------------------------------------------------
from PluginMgr import register_report

register_report(
    name = 'statistics_chart',
    category = Report.CATEGORY_DRAW,
    report_class = StatisticsChart,
    options_class = StatisticsChartOptions,
    modes = Report.MODE_GUI | Report.MODE_BKI | Report.MODE_CLI,
    translated_name = _("Statistics Chart"),
    status = (_("Stable")),
    author_name="Eero Tamminen",
    author_email="",
    description= _("Generates statistical bar and pie charts of the people in the database.")
    )