Implemented the UI

__init__.py

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+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+from calendar_ui import DatePicker, CalendarWidget

calculator.kv

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+
+<CustButton@Button>
+    font_size: 32
+    background_color: .55,.5,.4,.6
+<CalcGridLayout>:
+    id: calculator
+
+    rows: 5
+    cols: 3
+    padding: 30
+    spacing: 10
+
+    Label:
+
+        text: calculator.fake_init()
+        font_size: 20
+        canvas.before:
+
+    BoxLayout:
+        Image :
+            source: 'back.png'
+            allow_stretch: True
+            keep_ratio: False
+    BoxLayout:
+        DatePicker:
+
+            id: date
+    BoxLayout:
+
+        CustButton:
+            text: "low to high"
+            font_size: 20
+        CustButton:
+            text: "high to low"
+            font_size: 20
+    BoxLayout:
+        CustButton:
+            text: "low to high"
+            font_size: 20
+        CustButton:
+            text: "high to low"
+            font_size: 20
+
+    BoxLayout:
+        CustButton:
+            text: "Set Date"
+            on_press:
+                calculator.set_date(date)
+                one.text = calculator.top_ten("0")
+                two.text = calculator.top_ten("1")
+                three.text = calculator.top_ten("2")
+                four.text = calculator.top_ten("3")
+                five.text = calculator.top_ten("4")
+                six.text = calculator.top_ten("5")
+                seven.text = calculator.top_ten("6")
+                eight.text = calculator.top_ten("7")
+                nine.text = calculator.top_ten("8")
+
+
+
+    BoxLayout:
+        CustButton:
+            id: one
+            text: calculator.top_ten("0")
+            on_press: calculator.pull_up_ticker(one)
+            background_color: (0, 0.6, 0.2, 1.0)
+            font: 10
+    BoxLayout:
+        CustButton:
+            id: two
+            text: calculator.top_ten("1")
+            on_press: calculator.pull_up_ticker(two)
+            background_color: (0, 0.6, 0, 1.0)
+    BoxLayout:
+        CustButton:
+            id: three
+            text: calculator.top_ten("2")
+            on_press: calculator.pull_up_ticker(three)
+            background_color: (.4, 0.6, 0, 1.0)
+    BoxLayout:
+        CustButton:
+            id: four
+            text: calculator.top_ten("3")
+            on_press: calculator.pull_up_ticker(four)
+            background_color: (.6, 0.8, 0, 1.0)
+    BoxLayout:
+        CustButton:
+            id: five
+            text: calculator.top_ten("4")
+            on_press: calculator.pull_up_ticker(five)
+            background_color: (.8, 0.8, 0, 1.0)
+    BoxLayout:
+        CustButton:
+            id: six
+            text: calculator.top_ten("5")
+            on_press: calculator.pull_up_ticker(six)
+            background_color: (.8, 0.6, 0, 1.0)
+    BoxLayout:
+        CustButton:
+            id: seven
+            text: calculator.top_ten("6")
+            on_press: calculator.pull_up_ticker(seven)
+            background_color: (1, 0.8, 0, 1.0)
+    BoxLayout:
+        CustButton:
+            id: eight
+            text: calculator.top_ten("7")
+            on_press: calculator.pull_up_ticker(eight)
+            background_color: (1, 0.6, .2, 1.0)
+    BoxLayout:
+        CustButton:
+            id: nine
+            text: calculator.top_ten("8")
+            on_press: calculator.pull_up_ticker(nine)
+            background_color: (1, 0.4, 0, 1.0)

calendar_data.py

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+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+###########################################################
+# KivyCalendar (X11/MIT License)
+# Calendar & Date picker widgets for Kivy (http://kivy.org)
+# https://bitbucket.org/xxblx/kivycalendar
+# 
+# Oleg Kozlov (xxblx), 2015
+# https://xxblx.bitbucket.org/
+###########################################################
+
+
+from calendar import month_name, day_abbr, Calendar, monthrange
+from datetime import datetime
+from locale import getdefaultlocale
+from calendar import timegm as TimeEncoding
+def get_month_names():
+    """ Return list with months names """
+
+    result = []
+    # If it possible get months names in system language
+    try:
+        with TimeEncoding("%s.%s" % getdefaultlocale()) as time_enc:
+            for i in range(1, 13):
+                result.append(month_name[i].decode(time_enc))
+
+        return result
+
+    except:
+        return get_month_names_eng()
+
+def get_month_names_eng():
+    """ Return list with months names in english """
+
+    result = []
+    for i in range(1, 13):
+        result.append(month_name[i])
+
+    return result
+
+def get_days_abbrs():
+    """ Return list with days abbreviations """
+
+    result = []
+    # If it possible get days abbrs in system language
+    try:
+        with TimeEncoding("%s.%s" % getdefaultlocale()) as time_enc:
+            for i in range(7):
+                result.append(day_abbr[i].decode(time_enc))    
+    except:
+        for i in range(7):
+            result.append(day_abbr[i])
+
+    return result
+
+def calc_quarter(y, m):
+    """ Calculate previous and next month """
+
+    # Previous / Next month's year number and month number
+    prev_y = y
+    prev_m = m - 1
+    next_y = y
+    next_m = m + 1    
+
+    if m == 1:
+        prev_m = 12
+        prev_y = y - 1
+    elif m == 12:
+        next_m = 1
+        next_y = y + 1
+
+    return [(prev_y, prev_m), (y, m), (next_y, next_m)]
+
+def get_month(y, m):
+    """ 
+    Return list of month's weeks, which day 
+    is a turple (<month day number>, <weekday number>) 
+    """
+
+    cal = Calendar()
+    month = cal.monthdays2calendar(y, m)
+
+    # Add additional num to every day which mark from 
+    # this or from other day that day numer
+    for week in range(len(month)):
+        for day in range(len(month[week])):
+            _day = month[week][day]
+            if _day[0] == 0:
+                this = 0
+            else: 
+                this = 1
+            _day = (_day[0], _day[1], this)
+            month[week][day] = _day
+
+    # Days numbers of days from preious and next monthes
+    # marked as 0 (zero), replace it with correct numbers
+    # If month include 4 weeks it hasn't any zero
+    if len(month) == 4:
+        return month        
+
+    quater = calc_quarter(y, m)
+
+    # Zeros in first week    
+    fcount = 0
+    for i in month[0]:
+        if i[0] == 0:
+            fcount += 1
+
+    # Zeros in last week
+    lcount = 0
+    for i in month[-1]:
+        if i[0] == 0:
+            lcount += 1
+
+    if fcount:
+        # Last day of prev month
+        n = monthrange(quater[0][0], quater[0][1])[1]
+
+        for i in range(fcount):
+            month[0][i] = (n - (fcount - 1 - i), i, 0)
+
+    if lcount:
+        # First day of next month
+        n = 1
+
+        for i in range(lcount):
+            month[-1][-lcount + i] = (n + i, 7 - lcount + i, 0)
+
+    return month
+
+def get_quarter(y, m):
+    """ Get quarter where m is a middle month """
+
+    result = []
+    quarter = calc_quarter(y, m)
+    for i in quarter:
+        result.append(get_month(i[0], i[1]))
+
+    return result
+
+def today_date_list():
+    """ Return list with today date """
+
+    return [datetime.now().day, datetime.now().month, datetime.now().year]
+
+def today_date():
+    """ Return today date dd.mm.yyyy like 28.02.2015 """
+
+    return datetime.now().strftime("%d.%m.%Y")