Add morse app

Signed-off-by: Francesco Gazzetta <fgaz@fgaz.me>

README.rst

@@ -153,6 +153,10 @@ simulator:
    :alt: Heart rate application running on the wasp-os simulator
    :width: 179
 
+.. image:: res/MorseApp.png
+   :alt: Morse translator/notepad application running on the wasp-os simulator
+   :width: 179
+
 .. image:: res/SportsApp.png
    :alt: Sports applications, a combined stopwatch and step counter
    :width: 179

docs/apps.rst

@@ -51,6 +51,8 @@ Applications
 
 .. automodule:: apps.haiku
 
+.. automodule:: apps.morse
+
 .. automodule:: apps.musicplayer
 
 .. automodule:: apps.sports

wasp/apps/morse.py

@@ -0,0 +1,148 @@
+# SPDX-License-Identifier: LGPL-3.0-or-later
+# Copyright (C) 2021 Francesco Gazzetta
+
+"""Morse translator and notepad
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+This app is a simple morse translator that also doubles as a notepad.
+Swipe up for a line, swipe down for a dot, tap for end letter, double tap for
+end word.
+Up to 7 lines of translation will be displayed on a 240x240 screen, and old
+lines will be deleted.
+There is a preview of the next letter at the bottom of the screen.
+
+
+.. figure:: res/MorseApp.png
+    :width: 179
+"""
+
+import wasp
+import icons
+import fonts
+from math import floor
+from micropython import const
+
+
+_WIDTH = const(240)
+_HEIGHT = const(240)
+# No easy way to make this depend on _WIDTH
+_MAXINPUT = const(16)
+
+# These two need to match
+_FONTH = const(24)
+_FONT = fonts.sans24
+
+_LINEH = int(_FONTH * 1.25)
+_MAXLINES = floor(_HEIGHT / _LINEH) - 1 # the "-1" is the input line
+
+_code = {
+        ""     : " ",
+
+        ".-"   : "A",
+        "-..." : "B",
+        "-.-." : "C",
+        "-.."  : "D",
+        "."    : "E",
+        "..-." : "F",
+        "--."  : "G",
+        "...." : "H",
+        ".."   : "I",
+        ".---" : "J",
+        "-.-"  : "K",
+        ".-.." : "L",
+        "--"   : "M",
+        "-."   : "N",
+        "---"  : "O",
+        ".--." : "P",
+        "--.-" : "Q",
+        ".-."  : "R",
+        "..."  : "S",
+        "-"    : "T",
+        "..-"  : "U",
+        "...-" : "V",
+        ".--"  : "W",
+        "-..-" : "X",
+        "-.--" : "Y",
+        "--.." : "Z",
+
+        ".----": "1",
+        "..---": "2",
+        "...--": "3",
+        "....-": "4",
+        ".....": "5",
+        "-....": "6",
+        "--...": "7",
+        "---..": "8",
+        "----.": "9",
+        "-----": "0",
+        }
+
+class MorseApp():
+    NAME = 'Morse'
+    # 2-bit RLE, 96x64, generated from res/morse_icon.png, 143 bytes
+    ICON = (
+        b'\x02'
+        b'`@'
+        b'?\xff\xff\xff\xff\x13\xc4?\x1c\xc6?\x1b\xc6?\x1b\xc6'
+        b'?\x1a\xc8?\x19\xc8?\x18\xca?\x17\xc4\x02\xc4?\x17'
+        b'\xc4\x02\xc4?\x16\xc5\x02\xc5?\x15\xc4\x04\xc4?\x15\xc4'
+        b'\x04\xc4?\x14\xc4\x06\xc4?\x13\xc4\x06\xc4?\x12\xc5\x06'
+        b'\xc5?\x11\xc4\x08\xc4?\x11\xd0?\x10\xd2?\x0f\xd2?'
+        b'\x0e\xc5\n\xc4?\x0e\xc4\x0c\xc4?\r\xc4\x0c\xc4?\x0c'
+        b'\xc5\x0c\xc5?\x0b\xc4\x0e\xc4?\x0b\xc4\x0e\xc4?\n\xc4'
+        b'\x10\xc4?\xff\xff\xff\xff\x83\xc4\x0e\xda4\xc4\x0e\xda4'
+        b'\xc4\x0e\xda4\xc4\x0e\xda?\xff\xff\xff\xfe'
+    )
+
+    def __init__(self):
+        self.letter = ""
+        self.text = [""]
+        pass
+
+    def foreground(self):
+        self._draw()
+        wasp.system.request_event(wasp.EventMask.TOUCH |
+                                  wasp.EventMask.SWIPE_UPDOWN)
+
+    def swipe(self, event):
+        if len(self.letter) < _MAXINPUT:
+            self.letter += "-" if event[0] == wasp.EventType.UP else "."
+            self._update()
+
+    def touch(self, event):
+        addition = _code[self.letter] if self.letter in _code else "/{}/".format(self.letter)
+        self.letter = ""
+        merged = self.text[-1] + addition
+        # Check if the new text overflows the screen and add a new line if that's the case
+        split = wasp.watch.drawable.wrap(merged, _WIDTH)
+        if len(split) > 2:
+            self.text.append(self.text[-1][split[1]:split[2]] + addition)
+            self.text[-2] = self.text[-2][split[0]:split[1]]
+            if len(self.text) > _MAXLINES:
+                self.text.pop(0)
+            # Ideally a full refresh should be done only when we exceed
+            # _MAXLINES, but this should be fast enough
+            self._draw()
+        else:
+            self.text[-1] = merged
+        self._update()
+
+    def _draw(self):
+        """Draw the display from scratch"""
+        draw = wasp.watch.drawable
+        draw.fill()
+        i = 0
+        for line in self.text:
+            draw.string(line, 0, _LINEH * i)
+            i += 1
+        self._update()
+
+    def _update(self):
+        """Update the dynamic parts of the application display, specifically the
+        input line and last line of the text.
+        The full text area is updated in _draw() instead."""
+        draw = wasp.watch.drawable
+        draw.string(self.text[-1], 0, _LINEH*(len(self.text)-1))
+        guess = _code[self.letter] if self.letter in _code else "?"
+        draw.string("{} {}".format(self.letter, guess), 0, _HEIGHT - _FONTH, width=_WIDTH)
+

wasp/apps/software.py

@@ -42,6 +42,7 @@ class SoftwareApp():
         db.append(('calc', factory('Calculator')))
         db.append(('faces', factory('Faces')))
         db.append(('gameoflife', factory('Game Of Life')))
+        db.append(('morse', factory('Morse')))
         db.append(('musicplayer', factory('Music Player')))
         db.append(('play2048', factory('Play 2048')))
         db.append(('snake', factory('Snake Game')))

wasp/boards/manifest_240x240.py

@@ -14,6 +14,7 @@ manifest = (
     'apps/gameoflife.py',
     'apps/haiku.py',
     'apps/heart.py',
+    'apps/morse.py',
     'apps/musicplayer.py',
     'apps/launcher.py',
     'apps/pager.py',