├── views ├── __init__.py ├── elements.py ├── images │ ├── keyboard.ppm │ └── bark180navy.ppm ├── settings.py ├── helpers.py ├── main_view.py ├── lfo_view.py └── keyboard_keys_view.py ├── .gitignore ├── requirements.txt ├── Chico.wav ├── README.md ├── config.py ├── translations.py ├── player.py ├── oscillator.py ├── app.py ├── sample.py ├── rompler.py └── LICENSE /views/__init__.py: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | *.pyc 2 | -------------------------------------------------------------------------------- /requirements.txt: -------------------------------------------------------------------------------- 1 | numpy==1.22.3 2 | PyAudio==0.2.11 3 | -------------------------------------------------------------------------------- /Chico.wav: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/aniawsz/subwoofler/HEAD/Chico.wav -------------------------------------------------------------------------------- /views/elements.py: -------------------------------------------------------------------------------- 1 | class SquareElement(object): 2 | side_width = 38 3 | radius = 18 4 | -------------------------------------------------------------------------------- /views/images/keyboard.ppm: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/aniawsz/subwoofler/HEAD/views/images/keyboard.ppm -------------------------------------------------------------------------------- /views/images/bark180navy.ppm: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/aniawsz/subwoofler/HEAD/views/images/bark180navy.ppm -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # subwoofler 2 | A barking sampler 3 | 4 | A fun instrument written in Python to demonstrate how simple, read-only samplers are made. 5 | -------------------------------------------------------------------------------- /config.py: -------------------------------------------------------------------------------- 1 | SAMPLE_NAME = "Chico.wav" 2 | 3 | # The size of the audio buffer 4 | BUFFER_SIZE = 32 5 | 6 | # MIDI note playing back the original sample at the original speed 7 | CENTRAL_NOTE = 67 8 | -------------------------------------------------------------------------------- /views/settings.py: -------------------------------------------------------------------------------- 1 | class Font(object): 2 | family = "Courier" 3 | size = 16 4 | 5 | 6 | class ColorScheme(object): 7 | light_gray = "#bfbcaf" 8 | navy = "#2b3b47" 9 | red = "#ff473e" 10 | slate = "#597b91" 11 | vivid_blue = "#00b1ff" 12 | dim_blue = "#0096d1" 13 | -------------------------------------------------------------------------------- /translations.py: -------------------------------------------------------------------------------- 1 | KEYBOARD_KEY_TO_MIDI_NOTE = { 2 | "a": 60, # C3 3 | "w": 61, # C#3 4 | "s": 62, # D3 5 | "e": 63, # D#3 6 | "d": 64, # E3 7 | "f": 65, # F3 8 | "t": 66, # F#3 9 | "g": 67, # G3 10 | "y": 68, # G#3 11 | "h": 69, # A3 12 | "u": 70, # A#3 13 | "j": 71, # B3 14 | "k": 72, # C4 15 | } 16 | 17 | 18 | from config import CENTRAL_NOTE 19 | 20 | def midi_note_to_speed(midi_note): 21 | difference = midi_note - CENTRAL_NOTE 22 | return pow(2, difference / 12) 23 | -------------------------------------------------------------------------------- /views/helpers.py: -------------------------------------------------------------------------------- 1 | from tkinter import font as tkFont 2 | 3 | from .settings import Font 4 | 5 | 6 | # Draws a rectangle with rounded corners on top of a tkinter.Canvas 7 | def create_round_rectangle(canvas, x1, y1, x2, y2, radius=25, **kwargs): 8 | r = radius 9 | points = ( 10 | x1+r, y1, x1+r, y1, 11 | x2-r, y1, x2-r, y1, 12 | x2, y1, x2, y1+r, 13 | x2, y1+r, x2, y2-r, 14 | x2, y2-r, x2, y2, 15 | x2-r, y2, x2-r, y2, 16 | x1+r, y2, x1+r, y2, 17 | x1, y2, x1, y2-r, 18 | x1, y2-r, x1, y1+r, 19 | x1, y1+r, x1, y1) 20 | return canvas.create_polygon(points, **kwargs, smooth=True) 21 | 22 | 23 | def make_font(family=Font.family, size=Font.size): 24 | return tkFont.Font(family=family, size=size) 25 | -------------------------------------------------------------------------------- /player.py: -------------------------------------------------------------------------------- 1 | import pyaudio 2 | 3 | from contextlib import contextmanager 4 | 5 | from config import BUFFER_SIZE 6 | 7 | 8 | class Player(object): 9 | 10 | def __init__( 11 | self, 12 | generate_data_callback, 13 | sample_width, 14 | number_of_channels, 15 | sample_rate, 16 | *a, 17 | **k 18 | ): 19 | self._generate_data = generate_data_callback 20 | self._sample_width = sample_width 21 | self._number_of_channels = number_of_channels 22 | self._sample_rate = sample_rate 23 | 24 | def _get_next_buffer(self, in_data, frame_count, time_info, status): 25 | return (self._generate_data(), pyaudio.paContinue) 26 | 27 | @contextmanager 28 | def stream_audio(self): 29 | pya = pyaudio.PyAudio() 30 | audio_stream = pya.open( 31 | format=pyaudio.get_format_from_width(self._sample_width), 32 | channels=self._number_of_channels, 33 | rate=self._sample_rate, 34 | output=True, 35 | stream_callback=self._get_next_buffer, 36 | frames_per_buffer=BUFFER_SIZE, 37 | ) 38 | audio_stream.start_stream() 39 | try: 40 | yield audio_stream 41 | finally: 42 | audio_stream.stop_stream() 43 | audio_stream.close() 44 | pya.terminate() 45 | -------------------------------------------------------------------------------- /oscillator.py: -------------------------------------------------------------------------------- 1 | import numpy as np 2 | 3 | 4 | class LFO(object): 5 | """ 6 | Low frequency oscillator. 7 | Generates sine waves of specified rate and sampling frequency (in Hz). 8 | """ 9 | def __init__(self, rate, sample_rate): 10 | self._rate = rate 11 | self._sample_rate = sample_rate 12 | self._is_on = False 13 | 14 | # Indicate the current position in the waveform cycle 15 | self._phase = 0.0 16 | self._update_phase_increment() 17 | 18 | def _update_phase_increment(self): 19 | self._phase_increment = 2 * np.pi * self._rate / self._sample_rate 20 | 21 | @property 22 | def is_on(self): 23 | return self._is_on 24 | 25 | @is_on.setter 26 | def is_on(self, value): 27 | self._is_on = value 28 | 29 | @property 30 | def rate(self): 31 | return self._rate 32 | 33 | @rate.setter 34 | def rate(self, value): 35 | self._rate = value 36 | self._update_phase_increment() 37 | 38 | @property 39 | def sample_rate(self): 40 | return self._rate 41 | 42 | @sample_rate.setter 43 | def sample_rate(self, value): 44 | self._sample_rate = value 45 | self._update_phase_increment() 46 | 47 | def generate_next_buffer(self, buffer_size=1): 48 | """ 49 | Return buffer_size number of waveform points, 50 | starting where the last call left off. 51 | """ 52 | for _ in range(buffer_size): 53 | phase = self._phase 54 | yield np.sin(phase) 55 | phase += self._phase_increment 56 | self._phase = phase 57 | 58 | def reset(self): 59 | self._phase = 0.0 60 | -------------------------------------------------------------------------------- /app.py: -------------------------------------------------------------------------------- 1 | import tkinter as tk 2 | 3 | from queue import Queue 4 | 5 | from rompler import Rompler 6 | from translations import KEYBOARD_KEY_TO_MIDI_NOTE 7 | from views.main_view import MainView 8 | 9 | 10 | class Application(object): 11 | def __init__(self, window, *a, **kw): 12 | super(Application, self).__init__(*a, **kw) 13 | 14 | self._window = window 15 | 16 | # Create and start an audio thread. 17 | # It's going to communicate with the main thread through a thread-safe queue. 18 | self._notes_queue = Queue(maxsize=1) 19 | self._rompler = Rompler(name="AudioThread", notes_queue=self._notes_queue) 20 | self._rompler.start() 21 | 22 | # Create the app's GUI 23 | self._view = MainView(window, self._rompler) 24 | 25 | # Stop the audio thread when the app is closing 26 | window.protocol("WM_DELETE_WINDOW", self._on_closing) 27 | 28 | window.bind("", self._handle_keypress) 29 | window.bind("", self._handle_keyrelease) 30 | 31 | def _on_closing(self): 32 | self._rompler.stop.set() 33 | self._window.destroy() 34 | 35 | def _handle_keypress(self, event): 36 | try: 37 | key = event.char 38 | midi_note = KEYBOARD_KEY_TO_MIDI_NOTE[key] 39 | self._notes_queue.put(midi_note) 40 | self._view.on_key_pressed(key) 41 | except KeyError: 42 | # note not supported 43 | pass 44 | 45 | def _handle_keyrelease(self, event): 46 | key = event.char 47 | self._view.on_key_released(key) 48 | 49 | 50 | if __name__ == '__main__': 51 | root = tk.Tk() 52 | app = Application(root) 53 | root.attributes("-topmost", True) 54 | root.mainloop() 55 | -------------------------------------------------------------------------------- /views/main_view.py: -------------------------------------------------------------------------------- 1 | import os.path 2 | import tkinter as tk 3 | 4 | from .keyboard_keys_view import KeyboardKeysView 5 | from .lfo_view import LfoView 6 | 7 | DIR_NAME = os.path.dirname(__file__) 8 | 9 | class MainView(tk.Frame): 10 | def __init__(self, window, rompler, *a, **kw): 11 | super(MainView, self).__init__(window, *a, **kw) 12 | 13 | self._window = window 14 | 15 | # Set up the main window 16 | window.title("Subwoofler") 17 | window.geometry("800x760+360+20") 18 | window.config(bg="#ffffff") 19 | window.resizable(0,0) 20 | 21 | self._canvas = tk.Canvas(window) 22 | self._canvas.pack() 23 | 24 | self._background_image = self._create_background_image() 25 | self._logo = self._create_logo() 26 | 27 | self._keyboard_keys_view = KeyboardKeysView(self._canvas) 28 | 29 | self._lfo_view = LfoView(self._canvas, rompler.lfo) 30 | 31 | def on_key_pressed(self, key): 32 | self._keyboard_keys_view.on_key_pressed(key) 33 | 34 | def on_key_released(self, key): 35 | self._keyboard_keys_view.on_key_released(key) 36 | 37 | def _create_background_image(self): 38 | image_path = os.path.join(DIR_NAME, "images/keyboard.ppm") 39 | background_image = tk.PhotoImage(file=image_path) 40 | 41 | self._canvas.configure( 42 | width=background_image.width(), 43 | height=background_image.height(), 44 | ) 45 | self._canvas.create_image(0, 0, anchor=tk.NW, image=background_image) 46 | 47 | return background_image 48 | 49 | def _create_logo(self): 50 | image_path = os.path.join(DIR_NAME, "images/bark180navy.ppm") 51 | image = tk.PhotoImage(file=image_path) 52 | self._logo_label = tk.Label(None, image=image) 53 | 54 | self._canvas.create_window(555, 155, anchor=tk.NW, window=self._logo_label) 55 | 56 | return image 57 | -------------------------------------------------------------------------------- /sample.py: -------------------------------------------------------------------------------- 1 | import numpy as np 2 | 3 | 4 | SAMPLE_WIDTH_TO_NP_DATA_TYPE = { 5 | 1: np.int8, 6 | 2: np.int16, 7 | 4: np.int32, 8 | } 9 | 10 | 11 | class EmptySampleException(Exception): 12 | def __str__(self): 13 | return "Please provide a non-empty sample" 14 | 15 | 16 | class UnsupportedSampleWidth(Exception): 17 | def __str__(self): 18 | return "Can't read the sample because of unsupported sample width" 19 | 20 | 21 | class Sample(object): 22 | """A read-only container for sample data""" 23 | def __init__(self, fs, channels_no, raw_data, sample_width): 24 | self._fs = fs 25 | self._channels_no = channels_no 26 | 27 | # An array with frames of audio sample data. 28 | # A frame size depends on the number of channels and 29 | # the with of an audio sample in bytes: 30 | # frame_size = channels_no * sample_width 31 | try: 32 | self._data_type = SAMPLE_WIDTH_TO_NP_DATA_TYPE[sample_width] 33 | except KeyError: 34 | raise UnsupportedSampleWidth() 35 | 36 | data = np.fromstring(raw_data, self._data_type) 37 | # Add the padding of one extra sample for linear interpolation in the player 38 | padding = np.zeros(1, dtype=self._data_type) 39 | self._data = np.append(data, padding) 40 | 41 | self._sample_width = sample_width 42 | 43 | @property 44 | def sample_rate(self): 45 | """Sample rate in Hz""" 46 | return self._fs 47 | 48 | @property 49 | def number_of_channels(self): 50 | """Number of audio channels. Returns 1 for mono, 2 for stereo""" 51 | return self._channels_no 52 | 53 | @property 54 | def data(self): 55 | """A numpy array of frames of audio data""" 56 | return self._data 57 | 58 | @property 59 | def sample_width(self): 60 | """Sample width in bytes""" 61 | return self._sample_width 62 | 63 | @property 64 | def data_type(self): 65 | """Numpy data type of the stored sample data""" 66 | return self._data_type 67 | -------------------------------------------------------------------------------- /rompler.py: -------------------------------------------------------------------------------- 1 | import numpy as np 2 | import time 3 | import wave 4 | 5 | from threading import Event, Thread 6 | 7 | from config import BUFFER_SIZE, SAMPLE_NAME 8 | from oscillator import LFO 9 | from player import Player 10 | from sample import EmptySampleException, Sample 11 | from translations import midi_note_to_speed 12 | 13 | 14 | def lerp(left, right, fraction): 15 | """ 16 | Interpolates linearly between two given points. 17 | Fraction is a number in the range [0, 1]. 18 | """ 19 | return (1 - fraction) * left + fraction * right 20 | 21 | 22 | class Rompler(Thread): 23 | 24 | def __init__(self, notes_queue, *a, **k): 25 | super(Rompler, self).__init__(*a, **k) 26 | 27 | self._notes_queue = notes_queue 28 | self._note = None 29 | 30 | sample = Sample(*self._read_sample()) 31 | if len(sample.data) <= 0: 32 | raise EmptySampleException 33 | self._sample = sample 34 | self._data_type = sample.data_type 35 | 36 | # Subtracting the last padding zero for interpolation (see the Sample class) 37 | self._max_position = len(sample.data) - 2 38 | self._current_position = 0.0 39 | 40 | self._zeros = np.zeros(BUFFER_SIZE, dtype=self._data_type) 41 | 42 | self._playback_speed = 1.0 43 | 44 | self._player = Player( 45 | generate_data_callback=self._generate_next_buffer, 46 | sample_width=sample.sample_width, 47 | number_of_channels=sample.number_of_channels, 48 | sample_rate=sample.sample_rate, 49 | ) 50 | 51 | self._gain = 1 52 | 53 | self.lfo = LFO(0.5, sample.sample_rate) 54 | self.stop = Event() 55 | 56 | def _read_sample(self): 57 | with wave.open(SAMPLE_NAME, "rb") as f: 58 | fs = f.getframerate() 59 | channels_no = f.getnchannels() 60 | data = f.readframes(-1) 61 | sample_width = f.getsampwidth() 62 | return fs, channels_no, data, sample_width 63 | 64 | def _gains_for_buffer(self): 65 | """ 66 | Returns the volume amplification for each sample in the buffer. 67 | The LFO returns values from -1 to 1. We normalize it to get values from 0 to 1. 68 | """ 69 | if self.lfo.is_on: 70 | lfo_buffer = np.fromiter( 71 | self.lfo.generate_next_buffer(BUFFER_SIZE), 72 | dtype=np.float 73 | ) 74 | return self._gain * ((lfo_buffer - 1)/2 + 1) 75 | return self._gain 76 | 77 | def _generate_next_sample_buffer(self): 78 | data = self._sample.data 79 | for _ in range(BUFFER_SIZE): 80 | position = self._current_position 81 | if position < self._max_position: 82 | sample_index = int(position) 83 | yield lerp( 84 | data[sample_index], 85 | data[sample_index + 1], 86 | position - sample_index 87 | ) 88 | self._current_position += self._playback_speed 89 | else: 90 | yield 0 91 | 92 | def _generate_next_buffer(self): 93 | # Check if a new note was added to the queue; if so, play the new note 94 | if not self._notes_queue.empty(): 95 | self._note = self._notes_queue.get() 96 | self._current_position = 0.0 97 | self._playback_speed = midi_note_to_speed(self._note) 98 | 99 | if self._note: 100 | sample_buffer = np.fromiter( 101 | self._generate_next_sample_buffer(), 102 | dtype=np.float, 103 | count=BUFFER_SIZE 104 | ) 105 | sample_buffer *= self._gains_for_buffer() 106 | return sample_buffer.astype(self._data_type) 107 | return self._zeros 108 | 109 | def run(self): 110 | with self._player.stream_audio(): 111 | while not self.stop.is_set(): 112 | time.sleep(0.1) 113 | -------------------------------------------------------------------------------- /views/lfo_view.py: -------------------------------------------------------------------------------- 1 | import tkinter as tk 2 | 3 | from .elements import SquareElement 4 | from .helpers import create_round_rectangle 5 | from .settings import ColorScheme 6 | 7 | 8 | class Layout(object): 9 | on_off_button_begin_x = 176 10 | on_off_button_begin_y = 400 11 | 12 | rate_slider_begin_x = 240 13 | rate_slider_begin_y = 410 14 | 15 | 16 | class ButtonOnItem(SquareElement): 17 | fill_color = ColorScheme.slate 18 | active_color = ColorScheme.red 19 | 20 | 21 | class RateSliderItem(object): 22 | width = 18 23 | length = 111 24 | radius = ButtonOnItem.radius 25 | fill_color = ColorScheme.slate 26 | 27 | 28 | class LfoView(object): 29 | def __init__(self, canvas, lfo, *a, **k): 30 | super(LfoView, self).__init__(*a, **k) 31 | 32 | self._canvas = canvas 33 | self._lfo = lfo 34 | 35 | self._set_up_on_off_button() 36 | self._set_up_rate_slider() 37 | 38 | def _set_up_on_off_button(self): 39 | self._on_off_button_id = self._create_on_off_button() 40 | 41 | side_width = ButtonOnItem.side_width 42 | self._on_off_button_frame = tk.Frame( 43 | None, 44 | width=side_width, 45 | height=side_width, 46 | background="", 47 | ) 48 | self._on_off_button_frame.bind("", self._on_on_off_button_pressed) 49 | self._on_off_button_window = self._create_on_off_button_window() 50 | 51 | def _create_on_off_button(self): 52 | side_width = ButtonOnItem.side_width 53 | begin_x = Layout.on_off_button_begin_x 54 | begin_y = Layout.on_off_button_begin_y 55 | 56 | return create_round_rectangle( 57 | self._canvas, 58 | begin_x, 59 | begin_y, 60 | begin_x + side_width, 61 | begin_y + side_width, 62 | radius=ButtonOnItem.radius, 63 | fill=ButtonOnItem.active_color if self._lfo.is_on else ButtonOnItem.fill_color, 64 | ) 65 | 66 | def _create_on_off_button_window(self): 67 | return self._canvas.create_window( 68 | Layout.on_off_button_begin_x, 69 | Layout.on_off_button_begin_y, 70 | anchor=tk.NW, 71 | window=self._on_off_button_frame, 72 | ) 73 | 74 | def _on_on_off_button_pressed(self, event): 75 | self._lfo.is_on = not self._lfo.is_on 76 | self._canvas.itemconfig( 77 | self._on_off_button_id, 78 | fill=ButtonOnItem.active_color if self._lfo.is_on else ButtonOnItem.fill_color, 79 | ) 80 | self._canvas.delete(self._on_off_button_window) 81 | self._on_off_button_window = self._create_on_off_button_window() 82 | 83 | def _set_up_rate_slider(self): 84 | self._rate_slider = self._create_rate_slider() 85 | 86 | self._canvas.create_window( 87 | Layout.rate_slider_begin_x + int(RateSliderItem.radius / 2), 88 | Layout.rate_slider_begin_y, 89 | anchor=tk.NW, 90 | window=self._rate_slider, 91 | ) 92 | 93 | def _create_rate_slider(self): 94 | begin_x = Layout.rate_slider_begin_x 95 | begin_y = Layout.rate_slider_begin_y 96 | 97 | create_round_rectangle( 98 | self._canvas, 99 | begin_x, 100 | begin_y, 101 | begin_x + RateSliderItem.length, 102 | begin_y + RateSliderItem.width, 103 | radius=RateSliderItem.radius, 104 | fill=RateSliderItem.fill_color, 105 | ) 106 | 107 | return tk.Scale( 108 | None, 109 | from_=0.5, 110 | to=15.0, 111 | resolution=0.1, 112 | orient=tk.HORIZONTAL, 113 | background=ColorScheme.navy, 114 | activebackground=ColorScheme.light_gray, 115 | borderwidth=0, 116 | troughcolor=RateSliderItem.fill_color, 117 | showvalue=0, 118 | sliderlength=5, 119 | width=RateSliderItem.width, 120 | length=RateSliderItem.length - RateSliderItem.radius, 121 | command=self._set_lfo_rate, 122 | ) 123 | 124 | def _set_lfo_rate(self, value): 125 | self._lfo.rate = float(value) 126 | -------------------------------------------------------------------------------- /views/keyboard_keys_view.py: -------------------------------------------------------------------------------- 1 | import tkinter as tk 2 | 3 | from .elements import SquareElement 4 | from .helpers import create_round_rectangle, make_font 5 | from .settings import ColorScheme 6 | 7 | 8 | class Layout(object): 9 | 10 | left_black_keys_begin_x = 240 11 | right_black_keys_begin_x = 440 12 | black_keys_begin_y = 503 13 | 14 | white_keys_begin_x = 201 15 | white_keys_begin_y = 661 16 | 17 | white_piano_key_width = 57 18 | white_piano_keys_spacing = 9 19 | 20 | black_piano_key_width = 45 21 | black_piano_keys_spacing = 21 22 | 23 | 24 | class KeyboardKeyItem(SquareElement): 25 | fill_color = ColorScheme.light_gray 26 | active_color = ColorScheme.red 27 | font_color = ColorScheme.navy 28 | font_size = 16 29 | 30 | 31 | LEFT_BLACK_KEYS = ['w', 'e'] 32 | RIGHT_BLACK_KEYS = ['t', 'y', 'u'] 33 | WHITE_KEYS = ['a', 's', 'd', 'f', 'g', 'h', 'j'] 34 | 35 | 36 | class KeyboardKeysView(object): 37 | def __init__(self, canvas, *a, **k): 38 | super(KeyboardKeysView, self).__init__(*a, **k) 39 | 40 | self._canvas = canvas 41 | 42 | self._keyboard_key_items = self._create_keyboard_key_items() 43 | 44 | def on_key_pressed(self, key): 45 | try: 46 | item_id = self._keyboard_key_items[key] 47 | self._canvas.itemconfig(item_id, fill=KeyboardKeyItem.active_color) 48 | except KeyError: 49 | pass 50 | 51 | def on_key_released(self, key): 52 | try: 53 | item_id = self._keyboard_key_items[key] 54 | self._canvas.itemconfig(item_id, fill=KeyboardKeyItem.fill_color) 55 | except KeyError: 56 | pass 57 | 58 | def _create_keyboard_key_items(self): 59 | keyboard_key_items = {} 60 | 61 | font = make_font(size=KeyboardKeyItem.font_size) 62 | 63 | width = KeyboardKeyItem.side_width 64 | 65 | white_keys_margin = Layout.white_piano_key_width - width 66 | spacing = Layout.white_piano_key_width + Layout.white_piano_keys_spacing 67 | 68 | keyboard_key_items.update( 69 | self._create_keyboard_key_items_for_keys( 70 | WHITE_KEYS, 71 | Layout.white_keys_begin_x, 72 | Layout.white_keys_begin_y, 73 | spacing, 74 | white_keys_margin, 75 | font, 76 | ) 77 | ) 78 | 79 | left_black_keys_margin = Layout.black_piano_key_width - width 80 | spacing = Layout.black_piano_key_width + Layout.black_piano_keys_spacing 81 | 82 | keyboard_key_items.update( 83 | self._create_keyboard_key_items_for_keys( 84 | LEFT_BLACK_KEYS, 85 | Layout.left_black_keys_begin_x, 86 | Layout.black_keys_begin_y, 87 | spacing, 88 | left_black_keys_margin, 89 | font, 90 | ) 91 | ) 92 | 93 | keyboard_key_items.update( 94 | self._create_keyboard_key_items_for_keys( 95 | RIGHT_BLACK_KEYS, 96 | Layout.right_black_keys_begin_x, 97 | Layout.black_keys_begin_y, 98 | spacing, 99 | left_black_keys_margin, 100 | font, 101 | ) 102 | ) 103 | 104 | return keyboard_key_items 105 | 106 | def _create_keyboard_key_items_for_keys( 107 | self, 108 | keys, 109 | begin_x, 110 | begin_y, 111 | spacing, 112 | margin, 113 | font 114 | ): 115 | keyboard_key_items = {} 116 | 117 | width = KeyboardKeyItem.side_width 118 | 119 | even_margins = margin % 2 == 0 120 | margin_left = int(margin / 2) 121 | begin_x += margin_left 122 | 123 | font_size = KeyboardKeyItem.font_size 124 | letter_width = font.metrics()['linespace'] 125 | 126 | text_margin_left = int(width / 2 - letter_width / 2) + 4 127 | text_margin_top = int(width / 2 - font_size / 2) 128 | 129 | for ix, key in enumerate(keys): 130 | keyboard_key_items[key] = create_round_rectangle( 131 | self._canvas, 132 | begin_x, 133 | begin_y, 134 | begin_x + width, 135 | begin_y + width, 136 | radius=KeyboardKeyItem.radius, 137 | fill=KeyboardKeyItem.fill_color, 138 | ) 139 | 140 | self._canvas.create_text( 141 | begin_x + text_margin_left, 142 | begin_y + text_margin_top, 143 | text=key.upper(), 144 | width=width, 145 | anchor=tk.NW, 146 | font=font, 147 | fill=KeyboardKeyItem.font_color, 148 | ) 149 | 150 | begin_x += spacing 151 | 152 | # Compensate for uneven left and right margins to avoid drifting to the left 153 | if not even_margins and ix % 2 == 0: 154 | begin_x += 1 155 | 156 | return keyboard_key_items 157 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU AFFERO GENERAL PUBLIC LICENSE 2 | Version 3, 19 November 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU Affero General Public License is a free, copyleft license for 11 | software and other kinds of works, specifically designed to ensure 12 | cooperation with the community in the case of network server software. 13 | 14 | The licenses for most software and other practical works are designed 15 | to take away your freedom to share and change the works. By contrast, 16 | our General Public Licenses are intended to guarantee your freedom to 17 | share and change all versions of a program--to make sure it remains free 18 | software for all its users. 19 | 20 | When we speak of free software, we are referring to freedom, not 21 | price. Our General Public Licenses are designed to make sure that you 22 | have the freedom to distribute copies of free software (and charge for 23 | them if you wish), that you receive source code or can get it if you 24 | want it, that you can change the software or use pieces of it in new 25 | free programs, and that you know you can do these things. 26 | 27 | Developers that use our General Public Licenses protect your rights 28 | with two steps: (1) assert copyright on the software, and (2) offer 29 | you this License which gives you legal permission to copy, distribute 30 | and/or modify the software. 31 | 32 | A secondary benefit of defending all users' freedom is that 33 | improvements made in alternate versions of the program, if they 34 | receive widespread use, become available for other developers to 35 | incorporate. Many developers of free software are heartened and 36 | encouraged by the resulting cooperation. However, in the case of 37 | software used on network servers, this result may fail to come about. 38 | The GNU General Public License permits making a modified version and 39 | letting the public access it on a server without ever releasing its 40 | source code to the public. 41 | 42 | The GNU Affero General Public License is designed specifically to 43 | ensure that, in such cases, the modified source code becomes available 44 | to the community. It requires the operator of a network server to 45 | provide the source code of the modified version running there to the 46 | users of that server. Therefore, public use of a modified version, on 47 | a publicly accessible server, gives the public access to the source 48 | code of the modified version. 49 | 50 | An older license, called the Affero General Public License and 51 | published by Affero, was designed to accomplish similar goals. This is 52 | a different license, not a version of the Affero GPL, but Affero has 53 | released a new version of the Affero GPL which permits relicensing under 54 | this license. 55 | 56 | The precise terms and conditions for copying, distribution and 57 | modification follow. 58 | 59 | TERMS AND CONDITIONS 60 | 61 | 0. Definitions. 62 | 63 | "This License" refers to version 3 of the GNU Affero General Public License. 64 | 65 | "Copyright" also means copyright-like laws that apply to other kinds of 66 | works, such as semiconductor masks. 67 | 68 | "The Program" refers to any copyrightable work licensed under this 69 | License. Each licensee is addressed as "you". "Licensees" and 70 | "recipients" may be individuals or organizations. 71 | 72 | To "modify" a work means to copy from or adapt all or part of the work 73 | in a fashion requiring copyright permission, other than the making of an 74 | exact copy. The resulting work is called a "modified version" of the 75 | earlier work or a work "based on" the earlier work. 76 | 77 | A "covered work" means either the unmodified Program or a work based 78 | on the Program. 79 | 80 | To "propagate" a work means to do anything with it that, without 81 | permission, would make you directly or secondarily liable for 82 | infringement under applicable copyright law, except executing it on a 83 | computer or modifying a private copy. Propagation includes copying, 84 | distribution (with or without modification), making available to the 85 | public, and in some countries other activities as well. 86 | 87 | To "convey" a work means any kind of propagation that enables other 88 | parties to make or receive copies. Mere interaction with a user through 89 | a computer network, with no transfer of a copy, is not conveying. 90 | 91 | An interactive user interface displays "Appropriate Legal Notices" 92 | to the extent that it includes a convenient and prominently visible 93 | feature that (1) displays an appropriate copyright notice, and (2) 94 | tells the user that there is no warranty for the work (except to the 95 | extent that warranties are provided), that licensees may convey the 96 | work under this License, and how to view a copy of this License. If 97 | the interface presents a list of user commands or options, such as a 98 | menu, a prominent item in the list meets this criterion. 99 | 100 | 1. Source Code. 101 | 102 | The "source code" for a work means the preferred form of the work 103 | for making modifications to it. "Object code" means any non-source 104 | form of a work. 105 | 106 | A "Standard Interface" means an interface that either is an official 107 | standard defined by a recognized standards body, or, in the case of 108 | interfaces specified for a particular programming language, one that 109 | is widely used among developers working in that language. 110 | 111 | The "System Libraries" of an executable work include anything, other 112 | than the work as a whole, that (a) is included in the normal form of 113 | packaging a Major Component, but which is not part of that Major 114 | Component, and (b) serves only to enable use of the work with that 115 | Major Component, or to implement a Standard Interface for which an 116 | implementation is available to the public in source code form. A 117 | "Major Component", in this context, means a major essential component 118 | (kernel, window system, and so on) of the specific operating system 119 | (if any) on which the executable work runs, or a compiler used to 120 | produce the work, or an object code interpreter used to run it. 121 | 122 | The "Corresponding Source" for a work in object code form means all 123 | the source code needed to generate, install, and (for an executable 124 | work) run the object code and to modify the work, including scripts to 125 | control those activities. However, it does not include the work's 126 | System Libraries, or general-purpose tools or generally available free 127 | programs which are used unmodified in performing those activities but 128 | which are not part of the work. For example, Corresponding Source 129 | includes interface definition files associated with source files for 130 | the work, and the source code for shared libraries and dynamically 131 | linked subprograms that the work is specifically designed to require, 132 | such as by intimate data communication or control flow between those 133 | subprograms and other parts of the work. 134 | 135 | The Corresponding Source need not include anything that users 136 | can regenerate automatically from other parts of the Corresponding 137 | Source. 138 | 139 | The Corresponding Source for a work in source code form is that 140 | same work. 141 | 142 | 2. Basic Permissions. 143 | 144 | All rights granted under this License are granted for the term of 145 | copyright on the Program, and are irrevocable provided the stated 146 | conditions are met. This License explicitly affirms your unlimited 147 | permission to run the unmodified Program. The output from running a 148 | covered work is covered by this License only if the output, given its 149 | content, constitutes a covered work. This License acknowledges your 150 | rights of fair use or other equivalent, as provided by copyright law. 151 | 152 | You may make, run and propagate covered works that you do not 153 | convey, without conditions so long as your license otherwise remains 154 | in force. You may convey covered works to others for the sole purpose 155 | of having them make modifications exclusively for you, or provide you 156 | with facilities for running those works, provided that you comply with 157 | the terms of this License in conveying all material for which you do 158 | not control copyright. Those thus making or running the covered works 159 | for you must do so exclusively on your behalf, under your direction 160 | and control, on terms that prohibit them from making any copies of 161 | your copyrighted material outside their relationship with you. 162 | 163 | Conveying under any other circumstances is permitted solely under 164 | the conditions stated below. Sublicensing is not allowed; section 10 165 | makes it unnecessary. 166 | 167 | 3. Protecting Users' Legal Rights From Anti-Circumvention Law. 168 | 169 | No covered work shall be deemed part of an effective technological 170 | measure under any applicable law fulfilling obligations under article 171 | 11 of the WIPO copyright treaty adopted on 20 December 1996, or 172 | similar laws prohibiting or restricting circumvention of such 173 | measures. 174 | 175 | When you convey a covered work, you waive any legal power to forbid 176 | circumvention of technological measures to the extent such circumvention 177 | is effected by exercising rights under this License with respect to 178 | the covered work, and you disclaim any intention to limit operation or 179 | modification of the work as a means of enforcing, against the work's 180 | users, your or third parties' legal rights to forbid circumvention of 181 | technological measures. 182 | 183 | 4. Conveying Verbatim Copies. 184 | 185 | You may convey verbatim copies of the Program's source code as you 186 | receive it, in any medium, provided that you conspicuously and 187 | appropriately publish on each copy an appropriate copyright notice; 188 | keep intact all notices stating that this License and any 189 | non-permissive terms added in accord with section 7 apply to the code; 190 | keep intact all notices of the absence of any warranty; and give all 191 | recipients a copy of this License along with the Program. 192 | 193 | You may charge any price or no price for each copy that you convey, 194 | and you may offer support or warranty protection for a fee. 195 | 196 | 5. Conveying Modified Source Versions. 197 | 198 | You may convey a work based on the Program, or the modifications to 199 | produce it from the Program, in the form of source code under the 200 | terms of section 4, provided that you also meet all of these conditions: 201 | 202 | a) The work must carry prominent notices stating that you modified 203 | it, and giving a relevant date. 204 | 205 | b) The work must carry prominent notices stating that it is 206 | released under this License and any conditions added under section 207 | 7. This requirement modifies the requirement in section 4 to 208 | "keep intact all notices". 209 | 210 | c) You must license the entire work, as a whole, under this 211 | License to anyone who comes into possession of a copy. This 212 | License will therefore apply, along with any applicable section 7 213 | additional terms, to the whole of the work, and all its parts, 214 | regardless of how they are packaged. This License gives no 215 | permission to license the work in any other way, but it does not 216 | invalidate such permission if you have separately received it. 217 | 218 | d) If the work has interactive user interfaces, each must display 219 | Appropriate Legal Notices; however, if the Program has interactive 220 | interfaces that do not display Appropriate Legal Notices, your 221 | work need not make them do so. 222 | 223 | A compilation of a covered work with other separate and independent 224 | works, which are not by their nature extensions of the covered work, 225 | and which are not combined with it such as to form a larger program, 226 | in or on a volume of a storage or distribution medium, is called an 227 | "aggregate" if the compilation and its resulting copyright are not 228 | used to limit the access or legal rights of the compilation's users 229 | beyond what the individual works permit. Inclusion of a covered work 230 | in an aggregate does not cause this License to apply to the other 231 | parts of the aggregate. 232 | 233 | 6. Conveying Non-Source Forms. 234 | 235 | You may convey a covered work in object code form under the terms 236 | of sections 4 and 5, provided that you also convey the 237 | machine-readable Corresponding Source under the terms of this License, 238 | in one of these ways: 239 | 240 | a) Convey the object code in, or embodied in, a physical product 241 | (including a physical distribution medium), accompanied by the 242 | Corresponding Source fixed on a durable physical medium 243 | customarily used for software interchange. 244 | 245 | b) Convey the object code in, or embodied in, a physical product 246 | (including a physical distribution medium), accompanied by a 247 | written offer, valid for at least three years and valid for as 248 | long as you offer spare parts or customer support for that product 249 | model, to give anyone who possesses the object code either (1) a 250 | copy of the Corresponding Source for all the software in the 251 | product that is covered by this License, on a durable physical 252 | medium customarily used for software interchange, for a price no 253 | more than your reasonable cost of physically performing this 254 | conveying of source, or (2) access to copy the 255 | Corresponding Source from a network server at no charge. 256 | 257 | c) Convey individual copies of the object code with a copy of the 258 | written offer to provide the Corresponding Source. This 259 | alternative is allowed only occasionally and noncommercially, and 260 | only if you received the object code with such an offer, in accord 261 | with subsection 6b. 262 | 263 | d) Convey the object code by offering access from a designated 264 | place (gratis or for a charge), and offer equivalent access to the 265 | Corresponding Source in the same way through the same place at no 266 | further charge. You need not require recipients to copy the 267 | Corresponding Source along with the object code. If the place to 268 | copy the object code is a network server, the Corresponding Source 269 | may be on a different server (operated by you or a third party) 270 | that supports equivalent copying facilities, provided you maintain 271 | clear directions next to the object code saying where to find the 272 | Corresponding Source. Regardless of what server hosts the 273 | Corresponding Source, you remain obligated to ensure that it is 274 | available for as long as needed to satisfy these requirements. 275 | 276 | e) Convey the object code using peer-to-peer transmission, provided 277 | you inform other peers where the object code and Corresponding 278 | Source of the work are being offered to the general public at no 279 | charge under subsection 6d. 280 | 281 | A separable portion of the object code, whose source code is excluded 282 | from the Corresponding Source as a System Library, need not be 283 | included in conveying the object code work. 284 | 285 | A "User Product" is either (1) a "consumer product", which means any 286 | tangible personal property which is normally used for personal, family, 287 | or household purposes, or (2) anything designed or sold for incorporation 288 | into a dwelling. In determining whether a product is a consumer product, 289 | doubtful cases shall be resolved in favor of coverage. For a particular 290 | product received by a particular user, "normally used" refers to a 291 | typical or common use of that class of product, regardless of the status 292 | of the particular user or of the way in which the particular user 293 | actually uses, or expects or is expected to use, the product. A product 294 | is a consumer product regardless of whether the product has substantial 295 | commercial, industrial or non-consumer uses, unless such uses represent 296 | the only significant mode of use of the product. 297 | 298 | "Installation Information" for a User Product means any methods, 299 | procedures, authorization keys, or other information required to install 300 | and execute modified versions of a covered work in that User Product from 301 | a modified version of its Corresponding Source. The information must 302 | suffice to ensure that the continued functioning of the modified object 303 | code is in no case prevented or interfered with solely because 304 | modification has been made. 305 | 306 | If you convey an object code work under this section in, or with, or 307 | specifically for use in, a User Product, and the conveying occurs as 308 | part of a transaction in which the right of possession and use of the 309 | User Product is transferred to the recipient in perpetuity or for a 310 | fixed term (regardless of how the transaction is characterized), the 311 | Corresponding Source conveyed under this section must be accompanied 312 | by the Installation Information. But this requirement does not apply 313 | if neither you nor any third party retains the ability to install 314 | modified object code on the User Product (for example, the work has 315 | been installed in ROM). 316 | 317 | The requirement to provide Installation Information does not include a 318 | requirement to continue to provide support service, warranty, or updates 319 | for a work that has been modified or installed by the recipient, or for 320 | the User Product in which it has been modified or installed. Access to a 321 | network may be denied when the modification itself materially and 322 | adversely affects the operation of the network or violates the rules and 323 | protocols for communication across the network. 324 | 325 | Corresponding Source conveyed, and Installation Information provided, 326 | in accord with this section must be in a format that is publicly 327 | documented (and with an implementation available to the public in 328 | source code form), and must require no special password or key for 329 | unpacking, reading or copying. 330 | 331 | 7. Additional Terms. 332 | 333 | "Additional permissions" are terms that supplement the terms of this 334 | License by making exceptions from one or more of its conditions. 335 | Additional permissions that are applicable to the entire Program shall 336 | be treated as though they were included in this License, to the extent 337 | that they are valid under applicable law. If additional permissions 338 | apply only to part of the Program, that part may be used separately 339 | under those permissions, but the entire Program remains governed by 340 | this License without regard to the additional permissions. 341 | 342 | When you convey a copy of a covered work, you may at your option 343 | remove any additional permissions from that copy, or from any part of 344 | it. (Additional permissions may be written to require their own 345 | removal in certain cases when you modify the work.) You may place 346 | additional permissions on material, added by you to a covered work, 347 | for which you have or can give appropriate copyright permission. 348 | 349 | Notwithstanding any other provision of this License, for material you 350 | add to a covered work, you may (if authorized by the copyright holders of 351 | that material) supplement the terms of this License with terms: 352 | 353 | a) Disclaiming warranty or limiting liability differently from the 354 | terms of sections 15 and 16 of this License; or 355 | 356 | b) Requiring preservation of specified reasonable legal notices or 357 | author attributions in that material or in the Appropriate Legal 358 | Notices displayed by works containing it; or 359 | 360 | c) Prohibiting misrepresentation of the origin of that material, or 361 | requiring that modified versions of such material be marked in 362 | reasonable ways as different from the original version; or 363 | 364 | d) Limiting the use for publicity purposes of names of licensors or 365 | authors of the material; or 366 | 367 | e) Declining to grant rights under trademark law for use of some 368 | trade names, trademarks, or service marks; or 369 | 370 | f) Requiring indemnification of licensors and authors of that 371 | material by anyone who conveys the material (or modified versions of 372 | it) with contractual assumptions of liability to the recipient, for 373 | any liability that these contractual assumptions directly impose on 374 | those licensors and authors. 375 | 376 | All other non-permissive additional terms are considered "further 377 | restrictions" within the meaning of section 10. If the Program as you 378 | received it, or any part of it, contains a notice stating that it is 379 | governed by this License along with a term that is a further 380 | restriction, you may remove that term. If a license document contains 381 | a further restriction but permits relicensing or conveying under this 382 | License, you may add to a covered work material governed by the terms 383 | of that license document, provided that the further restriction does 384 | not survive such relicensing or conveying. 385 | 386 | If you add terms to a covered work in accord with this section, you 387 | must place, in the relevant source files, a statement of the 388 | additional terms that apply to those files, or a notice indicating 389 | where to find the applicable terms. 390 | 391 | Additional terms, permissive or non-permissive, may be stated in the 392 | form of a separately written license, or stated as exceptions; 393 | the above requirements apply either way. 394 | 395 | 8. Termination. 396 | 397 | You may not propagate or modify a covered work except as expressly 398 | provided under this License. Any attempt otherwise to propagate or 399 | modify it is void, and will automatically terminate your rights under 400 | this License (including any patent licenses granted under the third 401 | paragraph of section 11). 402 | 403 | However, if you cease all violation of this License, then your 404 | license from a particular copyright holder is reinstated (a) 405 | provisionally, unless and until the copyright holder explicitly and 406 | finally terminates your license, and (b) permanently, if the copyright 407 | holder fails to notify you of the violation by some reasonable means 408 | prior to 60 days after the cessation. 409 | 410 | Moreover, your license from a particular copyright holder is 411 | reinstated permanently if the copyright holder notifies you of the 412 | violation by some reasonable means, this is the first time you have 413 | received notice of violation of this License (for any work) from that 414 | copyright holder, and you cure the violation prior to 30 days after 415 | your receipt of the notice. 416 | 417 | Termination of your rights under this section does not terminate the 418 | licenses of parties who have received copies or rights from you under 419 | this License. If your rights have been terminated and not permanently 420 | reinstated, you do not qualify to receive new licenses for the same 421 | material under section 10. 422 | 423 | 9. Acceptance Not Required for Having Copies. 424 | 425 | You are not required to accept this License in order to receive or 426 | run a copy of the Program. Ancillary propagation of a covered work 427 | occurring solely as a consequence of using peer-to-peer transmission 428 | to receive a copy likewise does not require acceptance. However, 429 | nothing other than this License grants you permission to propagate or 430 | modify any covered work. These actions infringe copyright if you do 431 | not accept this License. Therefore, by modifying or propagating a 432 | covered work, you indicate your acceptance of this License to do so. 433 | 434 | 10. Automatic Licensing of Downstream Recipients. 435 | 436 | Each time you convey a covered work, the recipient automatically 437 | receives a license from the original licensors, to run, modify and 438 | propagate that work, subject to this License. You are not responsible 439 | for enforcing compliance by third parties with this License. 440 | 441 | An "entity transaction" is a transaction transferring control of an 442 | organization, or substantially all assets of one, or subdividing an 443 | organization, or merging organizations. If propagation of a covered 444 | work results from an entity transaction, each party to that 445 | transaction who receives a copy of the work also receives whatever 446 | licenses to the work the party's predecessor in interest had or could 447 | give under the previous paragraph, plus a right to possession of the 448 | Corresponding Source of the work from the predecessor in interest, if 449 | the predecessor has it or can get it with reasonable efforts. 450 | 451 | You may not impose any further restrictions on the exercise of the 452 | rights granted or affirmed under this License. For example, you may 453 | not impose a license fee, royalty, or other charge for exercise of 454 | rights granted under this License, and you may not initiate litigation 455 | (including a cross-claim or counterclaim in a lawsuit) alleging that 456 | any patent claim is infringed by making, using, selling, offering for 457 | sale, or importing the Program or any portion of it. 458 | 459 | 11. Patents. 460 | 461 | A "contributor" is a copyright holder who authorizes use under this 462 | License of the Program or a work on which the Program is based. The 463 | work thus licensed is called the contributor's "contributor version". 464 | 465 | A contributor's "essential patent claims" are all patent claims 466 | owned or controlled by the contributor, whether already acquired or 467 | hereafter acquired, that would be infringed by some manner, permitted 468 | by this License, of making, using, or selling its contributor version, 469 | but do not include claims that would be infringed only as a 470 | consequence of further modification of the contributor version. For 471 | purposes of this definition, "control" includes the right to grant 472 | patent sublicenses in a manner consistent with the requirements of 473 | this License. 474 | 475 | Each contributor grants you a non-exclusive, worldwide, royalty-free 476 | patent license under the contributor's essential patent claims, to 477 | make, use, sell, offer for sale, import and otherwise run, modify and 478 | propagate the contents of its contributor version. 479 | 480 | In the following three paragraphs, a "patent license" is any express 481 | agreement or commitment, however denominated, not to enforce a patent 482 | (such as an express permission to practice a patent or covenant not to 483 | sue for patent infringement). To "grant" such a patent license to a 484 | party means to make such an agreement or commitment not to enforce a 485 | patent against the party. 486 | 487 | If you convey a covered work, knowingly relying on a patent license, 488 | and the Corresponding Source of the work is not available for anyone 489 | to copy, free of charge and under the terms of this License, through a 490 | publicly available network server or other readily accessible means, 491 | then you must either (1) cause the Corresponding Source to be so 492 | available, or (2) arrange to deprive yourself of the benefit of the 493 | patent license for this particular work, or (3) arrange, in a manner 494 | consistent with the requirements of this License, to extend the patent 495 | license to downstream recipients. "Knowingly relying" means you have 496 | actual knowledge that, but for the patent license, your conveying the 497 | covered work in a country, or your recipient's use of the covered work 498 | in a country, would infringe one or more identifiable patents in that 499 | country that you have reason to believe are valid. 500 | 501 | If, pursuant to or in connection with a single transaction or 502 | arrangement, you convey, or propagate by procuring conveyance of, a 503 | covered work, and grant a patent license to some of the parties 504 | receiving the covered work authorizing them to use, propagate, modify 505 | or convey a specific copy of the covered work, then the patent license 506 | you grant is automatically extended to all recipients of the covered 507 | work and works based on it. 508 | 509 | A patent license is "discriminatory" if it does not include within 510 | the scope of its coverage, prohibits the exercise of, or is 511 | conditioned on the non-exercise of one or more of the rights that are 512 | specifically granted under this License. You may not convey a covered 513 | work if you are a party to an arrangement with a third party that is 514 | in the business of distributing software, under which you make payment 515 | to the third party based on the extent of your activity of conveying 516 | the work, and under which the third party grants, to any of the 517 | parties who would receive the covered work from you, a discriminatory 518 | patent license (a) in connection with copies of the covered work 519 | conveyed by you (or copies made from those copies), or (b) primarily 520 | for and in connection with specific products or compilations that 521 | contain the covered work, unless you entered into that arrangement, 522 | or that patent license was granted, prior to 28 March 2007. 523 | 524 | Nothing in this License shall be construed as excluding or limiting 525 | any implied license or other defenses to infringement that may 526 | otherwise be available to you under applicable patent law. 527 | 528 | 12. No Surrender of Others' Freedom. 529 | 530 | If conditions are imposed on you (whether by court order, agreement or 531 | otherwise) that contradict the conditions of this License, they do not 532 | excuse you from the conditions of this License. If you cannot convey a 533 | covered work so as to satisfy simultaneously your obligations under this 534 | License and any other pertinent obligations, then as a consequence you may 535 | not convey it at all. For example, if you agree to terms that obligate you 536 | to collect a royalty for further conveying from those to whom you convey 537 | the Program, the only way you could satisfy both those terms and this 538 | License would be to refrain entirely from conveying the Program. 539 | 540 | 13. Remote Network Interaction; Use with the GNU General Public License. 541 | 542 | Notwithstanding any other provision of this License, if you modify the 543 | Program, your modified version must prominently offer all users 544 | interacting with it remotely through a computer network (if your version 545 | supports such interaction) an opportunity to receive the Corresponding 546 | Source of your version by providing access to the Corresponding Source 547 | from a network server at no charge, through some standard or customary 548 | means of facilitating copying of software. This Corresponding Source 549 | shall include the Corresponding Source for any work covered by version 3 550 | of the GNU General Public License that is incorporated pursuant to the 551 | following paragraph. 552 | 553 | Notwithstanding any other provision of this License, you have 554 | permission to link or combine any covered work with a work licensed 555 | under version 3 of the GNU General Public License into a single 556 | combined work, and to convey the resulting work. The terms of this 557 | License will continue to apply to the part which is the covered work, 558 | but the work with which it is combined will remain governed by version 559 | 3 of the GNU General Public License. 560 | 561 | 14. Revised Versions of this License. 562 | 563 | The Free Software Foundation may publish revised and/or new versions of 564 | the GNU Affero General Public License from time to time. Such new versions 565 | will be similar in spirit to the present version, but may differ in detail to 566 | address new problems or concerns. 567 | 568 | Each version is given a distinguishing version number. If the 569 | Program specifies that a certain numbered version of the GNU Affero General 570 | Public License "or any later version" applies to it, you have the 571 | option of following the terms and conditions either of that numbered 572 | version or of any later version published by the Free Software 573 | Foundation. If the Program does not specify a version number of the 574 | GNU Affero General Public License, you may choose any version ever published 575 | by the Free Software Foundation. 576 | 577 | If the Program specifies that a proxy can decide which future 578 | versions of the GNU Affero General Public License can be used, that proxy's 579 | public statement of acceptance of a version permanently authorizes you 580 | to choose that version for the Program. 581 | 582 | Later license versions may give you additional or different 583 | permissions. However, no additional obligations are imposed on any 584 | author or copyright holder as a result of your choosing to follow a 585 | later version. 586 | 587 | 15. Disclaimer of Warranty. 588 | 589 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 590 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 591 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 592 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 593 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 594 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 595 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 596 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 597 | 598 | 16. Limitation of Liability. 599 | 600 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 601 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 602 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 603 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 604 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 605 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 606 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 607 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 608 | SUCH DAMAGES. 609 | 610 | 17. Interpretation of Sections 15 and 16. 611 | 612 | If the disclaimer of warranty and limitation of liability provided 613 | above cannot be given local legal effect according to their terms, 614 | reviewing courts shall apply local law that most closely approximates 615 | an absolute waiver of all civil liability in connection with the 616 | Program, unless a warranty or assumption of liability accompanies a 617 | copy of the Program in return for a fee. 618 | 619 | END OF TERMS AND CONDITIONS 620 | 621 | How to Apply These Terms to Your New Programs 622 | 623 | If you develop a new program, and you want it to be of the greatest 624 | possible use to the public, the best way to achieve this is to make it 625 | free software which everyone can redistribute and change under these terms. 626 | 627 | To do so, attach the following notices to the program. It is safest 628 | to attach them to the start of each source file to most effectively 629 | state the exclusion of warranty; and each file should have at least 630 | the "copyright" line and a pointer to where the full notice is found. 631 | 632 | woofler 633 | Copyright (C) 2018 Anna Wszeborowska 634 | 635 | This program is free software: you can redistribute it and/or modify 636 | it under the terms of the GNU Affero General Public License as published 637 | by the Free Software Foundation, either version 3 of the License, or 638 | (at your option) any later version. 639 | 640 | This program is distributed in the hope that it will be useful, 641 | but WITHOUT ANY WARRANTY; without even the implied warranty of 642 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 643 | GNU Affero General Public License for more details. 644 | 645 | You should have received a copy of the GNU Affero General Public License 646 | along with this program. If not, see . 647 | 648 | Also add information on how to contact you by electronic and paper mail. 649 | 650 | If your software can interact with users remotely through a computer 651 | network, you should also make sure that it provides a way for users to 652 | get its source. For example, if your program is a web application, its 653 | interface could display a "Source" link that leads users to an archive 654 | of the code. There are many ways you could offer source, and different 655 | solutions will be better for different programs; see section 13 for the 656 | specific requirements. 657 | 658 | You should also get your employer (if you work as a programmer) or school, 659 | if any, to sign a "copyright disclaimer" for the program, if necessary. 660 | For more information on this, and how to apply and follow the GNU AGPL, see 661 | . 662 | --------------------------------------------------------------------------------