GoodMorningSunshine/clock.py

# Many thanks to https://stackoverflow.com/questions/18923321/making-a-clock-in-kivy
import collections
import datetime
import math
import sys
import traceback
import copy
import os

def is_arm():
    if (os.uname()[4][:3] == 'arm') or (os.uname()[4][:7] == 'aarch64'):
        return True
    else:
        return False

if is_arm():
    # Do not forget to create udev rule:
    # echo 'SUBSYSTEM=="backlight",RUN+="/bin/chmod 666 /sys/class/backlight/%k/brightness /sys/class/backlight/%k/bl_power"' | sudo tee -a /etc/udev/rules.d/backlight-permissions.rules
    from rpi_backlight import Backlight

from kivy.config import Config
#Config.set('graphics', 'width', '800')
#Config.set('graphics', 'height', '480')
Config.set('graphics', 'width', '667')
Config.set('graphics', 'height', '400')
Config.set('graphics', 'maxfps', '60')

from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.label import Label
from kivy.uix.slider import Slider
from kivy.uix.button import Button
from kivy.clock import Clock
from kivy.lang import Builder
from kivy.graphics import Color, Line, Rectangle

import pulsectl
import vlc 

Builder.load_string('''
<MyClockWidget>:
    on_pos: self.update_display()
    on_size: self.update_display()

    FloatLayout
        id: face
        size_hint: None, None
        pos_hint: {"center_x":0.5, "center_y":0.5}
        size: 0.9*min(root.size), 0.9*min(root.size)
        canvas:
            Color:
                rgb: 0.1, 0.1, 0.1
            Ellipse:
                size: self.size
                pos: self.pos

    FloatLayout
        id: hands
        size_hint: None, None
        pos_hint: {"center_x":0.5, "center_y":0.5}
        size: 0.9*min(root.size), 0.9*min(root.size)

    FloatLayout
        id: set_alarm_button
        size_hint: None, None
        pos_hint: {"center_x":0.9, "center_y":0.1}
        size: 0.1*min(root.size), 0.1*min(root.size)

    FloatLayout
        id: settings_button
        size_hint: None, None
        pos_hint: {"center_x":0.9, "center_y":0.9}
        size: 0.1*310/560*min(root.size), 0.1*310/560*min(root.size)

    FloatLayout
        id: settings_menu
        size_hint: None, None
        pos_hint: {"center_x":0.5, "center_y":0.5}
        size: 0.7*min(root.size), 0.7*min(root.size)
        canvas:
            Color:
                rgb: 0.1, 0.1, 0.1
            Rectangle:
                size: self.size
                pos: self.pos
        GridLayout:
            rows: 8
            cols: 2
            pos_hint: {"center_x":0.5, "center_y":0.5}
            Label:
                text: "Volume"
                halign: "left"
                valign: "middle"
                text_size: self.size
            Slider:
                id: volume_slider
                min: 0
                max: 20
                value: 15
                on_value: root.volume_slider_value(*args)
                value_track: True
                value_track_color: [1, 0, 0, 1]
            Label:
                text:"Wake up sound"
                halign: "left"
                valign: "middle"
                text_size: self.size
            Button:
                id: settings_menu_wake_up_sound_select_button
                on_press: root.settings_menu_wake_up_sound_select_button_cb()
                text: str(app.alarm_settings.sound_selected)
            Label:
                text:"Wake up brightness"
                halign: "left"
                valign: "middle"
                text_size: self.size
            Slider:
                id: wake_up_bightness_slider
                min: 0
                max: 20
                value: 20
                on_value: root.wake_up_brightness_slider_value(*args)
                value_track: True
                value_track_color: [1, 0, 0, 1]
            Label:
                text:"Reading light brightness"
                halign: "left"
                valign: "middle"
                text_size: self.size
            Slider:
                id: reading_light_brightness_slider
                min: 0
                max: 20
                value: 1
                on_value: root.reading_light_brightness_slider_value(*args)
                value_track: True
                value_track_color: [1, 0, 0, 1]
            Label:
                text:"Display brightness"
                halign: "left"
                valign: "middle"
                text_size: self.size
            Slider:
                id: display_brightness_slider
                min: 0
                max: 20
                value: 10
                on_value: root.display_brightness_slider_value(*args)
                value_track: True
                value_track_color: [1, 0, 0, 1]
    FloatLayout
        id: settings_menu_wake_up_sound
        size_hint: None, None
        pos_hint: {"center_x":0.5, "center_y":0.5}
        size: 0.7*min(root.size), 0.7*min(root.size)
        canvas:
            Color:
                rgb: 0.1, 0.1, 0.1
            Rectangle:
                size: self.size
                pos: self.pos
        BoxLayout:
            orientation: "vertical"
            pos_hint: {"center_x":0.5, "center_y":0.5}
            Label:
                text: "Select wake up sound"
            GridLayout:
                cols: 2
                CheckBox:
                    group: "settings_menu_wake_up_sound"
                    on_active: root.settings_menu_wake_up_sound_cb(self, self.active, "Birds")
                    id: settings_menu_wake_up_sound_Birds
                Label:
                    text: "Birds"
                    halign: "left"
                    valign: "middle"
                    text_size: self.size
                    active: True
                CheckBox:
                    group: "settings_menu_wake_up_sound"
                    on_active: root.settings_menu_wake_up_sound_cb(self, self.active, "NPO Radio 1")
                    id: settings_menu_wake_up_sound_NpoRadio1
                Label:
                    text: "NPO Radio 1"
                    halign: "left"
                    valign: "middle"
                    text_size: self.size
            Button:
                id: settings_menu_wake_up_sound_Ok_button
                on_press: root.settings_menu_wake_up_sound_Ok_button_cb()
                text: "Ok"
''')

Position = collections.namedtuple('Position', 'x y')

class AlarmSettings():
    alarm_time = datetime.datetime(2022, 12, 10, 7, 30, 0, 0)
    alarm_activated = False
    alarm_playing = False

    alarm_modified = False
    led_color = [0, 0, 0]
    # sound_selected = "NPO Radio 1"
    # sound_source = "https://icecast.omroep.nl/radio1-bb-mp3"
    sound_selected = "Birds"
    sound_source = "Woodpecker Chirps - QuickSounds.com.mp3"
    seconds_to_sunrise = 30 * 60 # 30 minutes

    volume = 15
    wake_up_brightness = 20
    reading_light_brightness = 1
    display_brightness = 10

class Touch():
    def __init__(self, x=None):
        if x is None:
            self.pos = []
            self.spos = []
            self.is_empty = True
            self.angle = 0
        else:
            self.pos = [i for i in x.pos]
            self.spos = [i for i in x.spos]
            self.is_empty = False
            x = self.spos[0] - 0.5
            y = self.spos[1] - 0.5
            self.angle = math.atan2(y, x) / math.pi; # angle is between -1 and 1

    def __repr__(self):
        return ".is_empty: " + str(self.is_empty) + ", .pos: " + str(self.pos) + ", .spos: " + str(self.spos)

    def copy(self, x):
        self = Touch(x)

    def clear(self):
        self = Touch()

class MyClockWidget(FloatLayout):
    grabbed = ""
    face_numbers = []

    # if not grabbed, set_alarm_timeout_counter is incremented at every update call; 
    # this is used to blink the hands at 1 Hz when setting the alarm and releasing the hand
    set_alarm_timeout_counter = 0
    seconds_to_next_alarm = 0
    led_color = [0, 0, 0]

    # view can be one of the following strings:
    # - "clock" 
    # - "set_alarm"
    # - "settings_menu"
    # - "settings_menu_wake_up_sound"
    view = "clock"

    # we need a dirty hack to sensure that radio button is always in sync with selected setting
    settings_menu_wake_up_sound_select_button_cb_hack = False

    # defer drawing to improve application speed: if list of draw calls for
    # this frame is identical to list of previous frame then nothing needs to
    # be drawed
    draw_list_last_frame = []
    draw_list_curr_frame = []

    touch_prev = Touch()
    vlc = vlc.Instance()
    player = vlc.media_player_new()

    is_arm = is_arm()

    if is_arm:
        backlight = Backlight()
    else:
        backlight = None

    def play_sound(self, source):
        alarm_settings = App.get_running_app().alarm_settings

        if (self.player.get_state() == vlc.State.NothingSpecial) or \
                (self.player.get_state() == vlc.State.Paused) or \
                (self.player.get_state() == vlc.State.Stopped) or \
                (self.player.get_state() == vlc.State.Ended) or \
                (self.player.get_state() == vlc.State.Error):
            print("beep beep! " + source)
            media = self.vlc.media_new(source)
            self.player.set_media(media)
            self.player.play()
            alarm_settings.alarm_playing = True

    def stop_sound(self):
        self.player.stop()
        alarm_settings = App.get_running_app().alarm_settings
        alarm_settings.alarm_playing = False

    def set_backlight(self, x):
        offset = 3
        # 20 steps to from 1 to 100 - offset
        c = (100 - offset)**(1/20)

        y = c**x + offset
        z = max(1, round(y))
        self.backlight.brightness = z

    def hide_widget(self, widget, hide=True):
        if hasattr(widget, 'saved_attrs'):
            if not hide:
                widget.height, widget.size_hint_y, widget.opacity, widget.disabled = widget.saved_attrs
                del widget.saved_attrs
        elif hide:
            widget.saved_attrs = widget.height, widget.size_hint_y, widget.opacity, widget.disabled
            widget.height, widget.size_hint_y, widget.opacity, widget.disabled = 0, None, 0, True

    def draw_face(self):
        """
        Add number labels when added in widget hierarchy
        """

        alarm_settings = App.get_running_app().alarm_settings

        if self.view == "set_alarm":
            time = alarm_settings.alarm_time
        else:
            time = datetime.datetime.now()

        for i in range(1, 13):
            if time.hour < 12:
                offset = 0
            else:
                offset = 12

            self.face_numbers.append(Label(
                text=str(i + offset),
                pos_hint={
                    # pos_hint is a fraction in range (0, 1)
                    "center_x": 0.5 + 0.45*math.sin(2 * math.pi * i/12),
                    "center_y": 0.5 + 0.45*math.cos(2 * math.pi * i/12),
                }
            ))
            self.ids["face"].add_widget(self.face_numbers[i - 1])

    def update_face(self):
        alarm_settings = App.get_running_app().alarm_settings

        if self.view == "set_alarm":
            time = alarm_settings.alarm_time
        else:
            time = datetime.datetime.now()

        for i in range(0, 12):
            if time.hour < 12:
                offset = 0
            else:
                offset = 12

            self.face_numbers[i].text=str(i + 1 + offset)


    def on_parent(self, myclock, parent):
        self.draw_face()

    def position_on_clock(self, fraction, length):
        """
        Calculate position in the clock using trygonometric functions
        """
        center_x = self.size[0]/2
        center_y = self.size[1]/2
        return Position(
            center_x + round(length * math.sin(2 * math.pi * fraction)),
            center_y + round(length * math.cos(2 * math.pi * fraction)),
        )

    def update_set_alarm_button(self):
        alarm_settings = App.get_running_app().alarm_settings

        if (self.view == "set_alarm") or alarm_settings.alarm_activated:
            source = 'alarm_on.png'
            rgb = [0.9, 0.0, 0.0]
        else:
            source = 'alarm_off.png'
            rgb = [1.0, 1.0, 1.0]

        set_alarm_button = self.ids["set_alarm_button"]
        self.draw_list_curr_frame.append(["canvas.clear()", set_alarm_button])
        with set_alarm_button.canvas:
            self.draw_list_curr_frame.append(["Color", set_alarm_button.canvas, rgb[0], rgb[1], rgb[2]])
            # Rectangle(size=set_alarm_button.size, pos=set_alarm_button.pos, source=source)
            self.draw_list_curr_frame.append(["Rectangle", set_alarm_button.canvas, set_alarm_button.size, set_alarm_button.pos, source])

    def update_settings_button(self):
        alarm_settings = App.get_running_app().alarm_settings

        if (self.view.startswith("settings_menu")):
            source = 'settings_visible.png'
            rgb = [0.9, 0.0, 0.0]
        else:
            source = 'settings_not_visible.png'
            rgb = [1.0, 1.0, 1.0]

        settings_button = self.ids["settings_button"]
        self.draw_list_curr_frame.append(["canvas.clear()", settings_button])
        with settings_button.canvas:
            self.draw_list_curr_frame.append(["Color", settings_button.canvas, rgb[0], rgb[1], rgb[2]])
            # Rectangle(size=settings_button.size, pos=settings_button.pos, source=source)
            self.draw_list_curr_frame.append(["Rectangle", settings_button.canvas, settings_button.size, settings_button.pos, source])

    def sun_rise(self):
        alarm_settings = App.get_running_app().alarm_settings

        # to do: calculate brightness and color according to sun rise instead of linear increment
        intensity = math.floor((1.0 - self.seconds_to_next_alarm / alarm_settings.seconds_to_sunrise) * 256.0)
        if intensity < 0:
            intensity = 0

        led_color = [0, 0, 0]
        for i in range(3):
            led_color[i] = intensity

        if self.led_color != led_color:
            self.led_color = led_color

    def check_sun_rise(self):
        alarm_settings = App.get_running_app().alarm_settings

        if alarm_settings.alarm_activated == False:
            return

        if self.seconds_to_next_alarm < alarm_settings.seconds_to_sunrise:
            self.sun_rise()

    def check_play_sound(self):
        alarm_settings = App.get_running_app().alarm_settings

        if alarm_settings.alarm_activated == False:
            return

        if (self.seconds_to_next_alarm < 0.1) or (alarm_settings.alarm_playing == True):
            if alarm_settings.sound_source != "":
                self.play_sound(alarm_settings.sound_source)

    def calc_seconds_to_next_alarm(self):
        alarm_settings = App.get_running_app().alarm_settings

        if alarm_settings.alarm_activated == False:
            return

        # Make sure alarm_time is in the future but not more than 24 h from now
        now = datetime.datetime.now()
        d = alarm_settings.alarm_time - now
        alarm_settings.alarm_time -= datetime.timedelta(days=d.days)

        # Calculate number of seconds until next alarm
        d = alarm_settings.alarm_time - now
        self.seconds_to_next_alarm = d.days * 24 * 3600 + d.seconds + d.microseconds / 1000000.0

    def check_alarm(self):
        self.calc_seconds_to_next_alarm()
        self.check_sun_rise()
        self.check_play_sound()

    def update_clock(self):
        self.draw_list_curr_frame.append(["self.hide_widget", self.ids["face"], False])
        self.draw_list_curr_frame.append(["self.hide_widget", self.ids["hands"], False])
        alarm_settings = App.get_running_app().alarm_settings

        if self.view == "set_alarm":
            time = alarm_settings.alarm_time
        else:
            time = datetime.datetime.now()

        hands = self.ids["hands"]
        seconds_hand = self.position_on_clock(time.second/60, length=0.45*hands.size[0])
        minutes_hand = self.position_on_clock(time.minute/60+time.second/3600, length=0.40*hands.size[0])
        hours_hand = self.position_on_clock(time.hour/12 + time.minute/720, length=0.35*hands.size[0])

        self.update_face()

        #hands.canvas.clear()
        self.draw_list_curr_frame.append(["canvas.clear()", hands])
        update_rate = App.get_running_app().update_rate
        with hands.canvas:
            if self.view == "set_alarm":
                if self.grabbed != "" or self.set_alarm_timeout_counter < 1 * update_rate or \
                      self.set_alarm_timeout_counter % update_rate <= update_rate / 2 or alarm_settings.alarm_modified == False:
                    self.draw_list_curr_frame.append(["Color", hands.canvas, 0.9, 0.0, 0.0])
                    # Line(points=[hands.center_x, hands.center_y, hours_hand.x, hours_hand.y], width=3, cap="round")
                    self.draw_list_curr_frame.append(["Line", hands.canvas, [hands.center_x, hands.center_y, hours_hand.x, hours_hand.y], 3, "round"])
                    self.draw_list_curr_frame.append(["Color", hands.canvas, 0.8, 0.0, 0.0])
                    #Line(points=[hands.center_x, hands.center_y, minutes_hand.x, minutes_hand.y], width=2, cap="round")
                    self.draw_list_curr_frame.append(["Line", hands.canvas, [hands.center_x, hands.center_y, minutes_hand.x, minutes_hand.y], 2, "round"])

                if self.grabbed == "":
                    self.set_alarm_timeout_counter += 1

                if self.set_alarm_timeout_counter >= 4.5 * update_rate:
                    self.view = "clock"
                    self.set_alarm_timeout_counter = 0

                    if alarm_settings.alarm_modified:
                        alarm_settings.alarm_activated = True
                    alarm_settings.alarm_modified = False
            else:
                self.draw_list_curr_frame.append(["Color", hands.canvas, 0.9, 0.9, 0.9])
                # Line(points=[hands.center_x, hands.center_y, hours_hand.x, hours_hand.y], width=3, cap="round")
                self.draw_list_curr_frame.append(["Line", hands.canvas, [hands.center_x, hands.center_y, hours_hand.x, hours_hand.y], 3, "round"])
                self.draw_list_curr_frame.append(["Color", hands.canvas, 0.8, 0.8, 0.8])
                # Line(points=[hands.center_x, hands.center_y, minutes_hand.x, minutes_hand.y], width=2, cap="round")
                self.draw_list_curr_frame.append(["Line", hands.canvas, [hands.center_x, hands.center_y, minutes_hand.x, minutes_hand.y], 2, "round"])
                self.draw_list_curr_frame.append(["Color", hands.canvas, 0.7, 0.7, 0.7])
                # Line(points=[hands.center_x, hands.center_y, seconds_hand.x, seconds_hand.y], width=1, cap="round")
                self.draw_list_curr_frame.append(["Line", hands.canvas, [hands.center_x, hands.center_y, seconds_hand.x, seconds_hand.y], 1, "round"])

    def update_settings(self):
        if self.view == "settings_menu":
            self.draw_list_curr_frame.append(["self.hide_widget", self.ids["settings_menu"], False])
        elif self.view == "settings_menu_wake_up_sound":
            self.draw_list_curr_frame.append(["self.hide_widget", self.ids["settings_menu_wake_up_sound"], False])

    def draw_display(self):
        if self.draw_list_curr_frame != self.draw_list_last_frame:
            for i in self.draw_list_curr_frame:
                if i[0] == "self.hide_widget":
                    self.hide_widget(i[1], i[2])
                elif i[0] == "canvas.clear()":
                    i[1].canvas.clear()
                elif i[0] == "Color":
                    with i[1]:
                        Color(i[2], i[3], i[4])
                elif i[0] == "Rectangle":
                    with i[1]:
                        Rectangle(size=i[2], pos=i[3], source=i[4])
                elif i[0] == "Line":
                    with i[1]:
                        Line(points=i[2], width=i[3], cap=i[4])
                else:
                    print("Unknown draw command: " + i[0])
            self.draw_list_last_frame = self.draw_list_curr_frame
        self.draw_list_curr_frame = []
            
    def update_display(self, *args):
        self.check_alarm()

        # Hide all dynamic widgets; will be enabled when updating respecive view
        self.draw_list_curr_frame.append(["self.hide_widget", self.ids["face"], True])
        self.draw_list_curr_frame.append(["self.hide_widget", self.ids["hands"], True])
        self.draw_list_curr_frame.append(["self.hide_widget", self.ids["settings_menu"], True])
        self.draw_list_curr_frame.append(["self.hide_widget", self.ids["settings_menu_wake_up_sound"], True])

        self.update_set_alarm_button()
        self.update_settings_button()
        if self.view == "clock" or self.view == "set_alarm":
            self.update_clock()
        elif self.view.startswith("settings_menu"):
            self.update_settings()
        else:
            print("unknown view: " + self.view)

        self.draw_display()

    def settings_menu_wake_up_sound_select_button_cb(self):
        self.settings_menu_wake_up_sound_select_button_cb_hack = True
        alarm_settings = App.get_running_app().alarm_settings

        self.ids["settings_menu_wake_up_sound_Birds"].active = False
        self.ids["settings_menu_wake_up_sound_NpoRadio1"].active = False
        print("sound selected: " + alarm_settings.sound_selected)
        if alarm_settings.sound_selected == "Birds":
            self.ids["settings_menu_wake_up_sound_Birds"].active = True
        elif alarm_settings.sound_selected == "NPO Radio 1":
            self.ids["settings_menu_wake_up_sound_NpoRadio1"].active = True
            
        self.view = "settings_menu_wake_up_sound"

    def settings_menu_wake_up_sound_Ok_button_cb(self):
        alarm_settings = App.get_running_app().alarm_settings

        self.ids["settings_menu_wake_up_sound_select_button"].text = alarm_settings.sound_selected
        self.view = "settings_menu"

    def settings_menu_wake_up_sound_cb(self, instance, value, sound):
        alarm_settings = App.get_running_app().alarm_settings

        if self.settings_menu_wake_up_sound_select_button_cb_hack:
            self.settings_menu_wake_up_sound_select_button_cb_hack = False
            if not (alarm_settings.sound_selected == "" and sound != ""):
                return
            
        if value == True:
            print("You selected " + sound)
        else:
            print("You deselected " + sound)

        alarm_settings.sound_source = ""
        alarm_settings.sound_selected = ""
        if self.ids["settings_menu_wake_up_sound_Birds"].active:
            alarm_settings.sound_selected = sound
            alarm_settings.sound_source = "Woodpecker Chirps - QuickSounds.com.mp3"
        elif self.ids["settings_menu_wake_up_sound_NpoRadio1"].active:
            alarm_settings.sound_selected = sound
            alarm_settings.sound_source = "https://icecast.omroep.nl/radio1-bb-mp3"

    def volume_slider_value(self, *args):
        alarm_settings = App.get_running_app().alarm_settings

        alarm_settings.volume = int(args[1])

        print("Volume changed to " + str(alarm_settings.volume))

        with pulsectl.Pulse('volume-increaser') as pulse:
            for sink in pulse.sink_list():
                # Volume is usually in 0-1.0 range, with >1.0 being soft-boosted
                old_vol = pulse.volume_get_all_chans(sink)
                pulse.volume_set_all_chans(sink, alarm_settings.volume / 20.0)
                new_vol = pulse.volume_get_all_chans(sink)
                print("HW volume changed from " + str(old_vol) + " to " + str(new_vol))


    def wake_up_brightness_slider_value(self, *args):
        alarm_settings = App.get_running_app().alarm_settings

        alarm_settings.wake_up_brightness = int(args[1])
        print("Wake up brightness changed to " + str(alarm_settings.wake_up_brightness))

    def reading_light_brightness_slider_value(self, *args):
        alarm_settings = App.get_running_app().alarm_settings

        alarm_settings.reading_light_brightness = int(args[1])
        print("Reading light brightness changed to " + str(alarm_settings.reading_light_brightness))

    def display_brightness_slider_value(self, *args):
        alarm_settings = App.get_running_app().alarm_settings

        alarm_settings.display_brightness = int(args[1])
        if self.is_arm:
            self.set_backlight(alarm_settings.display_brightness)

    def on_alarm_button_pressed(self):
        alarm_settings = App.get_running_app().alarm_settings

        alarm_settings.alarm_modified = False
        self.set_alarm_timeout_counter = 0

        if self.view == "set_alarm":
            self.view = "clock"
            alarm_settings.alarm_activated = False
        else:
            self.view = "set_alarm"
            alarm_settings.alarm_activated = True

    def on_settings_button_pressed(self):
        print("settings button pressed from view " + self.view)
        if self.view != "settings_menu":
            self.view = "settings_menu"
        else:
            self.view = "clock"
        print("view updated to " + self.view)

    def on_touch_up(self, touch):
        self.grabbed = ""
        alarm_settings = App.get_running_app().alarm_settings


        if (self.view == "set_alarm") and (self.grabbed == "hour" or self.grabbed == "minute"):
            self.set_alarm_timeout_counter = 0

        super(MyClockWidget, self).on_touch_up(touch)

    def on_touch_move(self, touch):
        if self.grabbed == "":
            return

        alarm_settings = App.get_running_app().alarm_settings

        self.alarm_set_timeout = 0

        touch_curr = Touch(touch)

        # Ugly workaround for issue with Kivy and Raspberry Pi 3 + touch screen
        tol = 0.5 # 0.5 is equal to 90 degrees
        inc = 1 # 1 is equal to 180 degrees
        if (self.touch_prev.is_empty == False) and (touch_curr.angle - self.touch_prev.angle >= tol):
            while touch_curr.angle - self.touch_prev.angle >= tol:
                touch_curr.angle -= inc
        elif (self.touch_prev.is_empty == False) and (touch_curr.angle - self.touch_prev.angle <= -tol):
            while touch_curr.angle - self.touch_prev.angle <= -tol:
                touch_curr.angle += inc

        self.touch_prev = copy.deepcopy(touch_curr)

        if self.grabbed == "minute":
            alarm_settings.alarm_modified = True
            self.set_alarm_timeout_counter = 0
            minute = round(-touch_curr.angle * 30 + 15)

            while minute < 0:
                minute += 60
            while minute >= 60:
                minute -= 60

            # Sometimes the hand is 30 minutes ahead / behind the place where the user touches the screen --> correct for this behavior
            if (((minute - alarm_settings.alarm_time.minute) >= 15) and ((minute - alarm_settings.alarm_time.minute) <= 45)):
                minute = minute - 30
            elif (((minute - alarm_settings.alarm_time.minute) <= -15) and ((minute - alarm_settings.alarm_time.minute) >= -45)):
                minute = minute + 30

            while minute < 0:
                minute += 60
            while minute >= 60:
                minute -= 60

            # hour correction
            hour = alarm_settings.alarm_time.hour
            if alarm_settings.alarm_time.minute >= 55 and minute <= 5:
                hour += 1
            elif alarm_settings.alarm_time.minute <= 5 and minute >= 55:
                hour -= 1

            while hour < 0:
                hour += 24
            while hour >= 24:
                hour -= 24

            alarm_settings.alarm_time = datetime.datetime(alarm_settings.alarm_time.year, \
                alarm_settings.alarm_time.month, alarm_settings.alarm_time.day, \
                hour, minute, alarm_settings.alarm_time.second, 0)
        elif self.grabbed == "hour":
            alarm_settings.alarm_modified = True
            self.set_alarm_timeout_counter = 0
            hour = round(-touch_curr.angle * 6 + 3)

            while hour < 0:
                hour += 12
            while hour >= 12:
                hour -= 12

            # Sometimes the hand is 6 hours ahead / behind the place where the user touches the screen --> correct for this behavior
            if (((hour - alarm_settings.alarm_time.hour) >= 3) and ((hour - alarm_settings.alarm_time.hour) <= 9)):
                hour = hour - 6
            if (((hour - alarm_settings.alarm_time.hour) <= -3) and ((hour - alarm_settings.alarm_time.hour) >= -9)):
                hour = hour + 6

            while hour < 0:
                hour += 12
            while hour >= 12:
                hour -= 12

            if alarm_settings.alarm_time.hour >= 12:
                hour += 12


            # AM / PM correction
            if alarm_settings.alarm_time.hour == 11 and hour == 0:
                hour = 12
            elif alarm_settings.alarm_time.hour == 23 and hour == 12:
                hour = 0
            elif alarm_settings.alarm_time.hour == 0 and hour == 11:
                hour = 23
            elif alarm_settings.alarm_time.hour == 12 and hour == 23:
                hour = 11

            minute = alarm_settings.alarm_time.minute
            alarm_settings.alarm_time = datetime.datetime(alarm_settings.alarm_time.year, \
                alarm_settings.alarm_time.month, alarm_settings.alarm_time.day, \
                hour, alarm_settings.alarm_time.minute, alarm_settings.alarm_time.second, 0)

        super(MyClockWidget, self).on_touch_move(touch)

    def on_touch_down(self, touch):
        alarm_settings = App.get_running_app().alarm_settings

        time = alarm_settings.alarm_time
        hands = self.ids["hands"]
        minutes_hand = self.position_on_clock(time.minute/60+time.second/3600, length=0.40*hands.size[0])
        hours_hand = self.position_on_clock(time.hour/12 + time.minute/720, length=0.35*hands.size[0])

        if (0.85 <= touch.spos[0] <= 0.95) and (0.05 <= touch.spos[1] <= 0.15):
            self.on_alarm_button_pressed()
        elif (0.85 <= touch.spos[0] <= 0.95) and (0.85 <= touch.spos[1] <= 0.95):
            self.on_settings_button_pressed()
        elif self.view == "set_alarm":
            self.set_alarm_timeout_counter = 0
            if self.grabbed == "":
                if (minutes_hand.x - 0.1 * self.size[0] <= touch.pos[0] <= minutes_hand.x + 0.1 * self.size[0]) and \
                    (minutes_hand.y - 0.1 * self.size[1] <= touch.pos[1] <= minutes_hand.y + 0.1 * self.size[1]):
                    self.grabbed = "minute"
                    self.touch_prev.clear()
                elif (hours_hand.x - 0.1 * self.size[0] <= touch.pos[0] <= hours_hand.x + 0.1 * self.size[0]) and \
                    (hours_hand.y - 0.1 * self.size[1] <= touch.pos[1] <= hours_hand.y + 0.1 * self.size[1]):
                    self.grabbed = "hour"
                    self.touch_prev.clear()
                else:
                    self.grabbed = ""
                print("grabbed: " + self.grabbed)
        elif self.view == "settings_menu":
            pass
        elif self.view == "clock":
            self.stop_sound()

        super(MyClockWidget, self).on_touch_down(touch)


class MyApp(App):
    alarm_settings = AlarmSettings()
    update_rate = 60.0

    # apply volume setting
    with pulsectl.Pulse('volume-increaser') as pulse:
        for sink in pulse.sink_list():
            # Volume is usually in 0-1.0 range, with >1.0 being soft-boosted
            old_vol = pulse.volume_get_all_chans(sink)
            pulse.volume_set_all_chans(sink, alarm_settings.volume / 20.0)
            new_vol = pulse.volume_get_all_chans(sink)
            print("HW volume changed from " + str(old_vol) + " to " + str(new_vol))

    def build(self):
        clock_widget = MyClockWidget()
        update_rate = App.get_running_app().update_rate
        # update initially, just after construction of the widget is complete
        Clock.schedule_once(clock_widget.update_display, 0)
        # then update at update_rate times per second
        Clock.schedule_interval(clock_widget.update_display, 1.0/update_rate)
        return clock_widget

def except_hook(type, value, tb):
    return

if __name__ == '__main__':
    # sys.excepthook = except_hook
    MyApp().run()